Cable, bus bar installation does not conform to the requirements

small motor spares suppliers of motor parts 

Specifications
1.20 years fan&motor manufactruer 
2.We can open mould&punch&diecast&finish&winding 

3.competitive price,high quality 
L, phenomenon (l), listed cable is installed is not regulated, and water pump price cable clutter in cable trench, bridge. (2), in the shaft, the cable hole wall sealing is not tight; Vertical fixed cable bracket is too small, too soft, downward sloping. (3), cable through the tube after not single phase motor sealing tight. Line (4), terminals (ear) is too big or too small, the wall is too thin, when pressure joint fracture. (5), the plug box installation of busbar is not straight, paragraphs bus is too long, not easy to transport and install. 2, (1) analysis of lamination the causes, the cable was not coordinate construction units, but their laying cable can pass. (2), and the construction unit in block heavy current generator shaft without good coordination, construction personnel don't master the plugging ac synchronous generator technology. (3), the material didn't pass the exam, purchasing personnel is not in accordance with the standard purchase cable fixed bracket and terminal in line (ears). (4), building professional for high voltage electrical professional do the area of the shaft is too small, result in heavy current shaft arrangement difficult. 

three phase induction electric motor Y series B35 1.5KW 2.2KW 37KW 75KW
Specifications
-One year warranty
-Within 25 days delivery
-Life: 5-7 years
3, preventive measures (1), and to coordinate between cable construction team, cable were lined up to the size and position, after the installation with moistureproof and anticorrosive card listed, indicating a variety of cable line number, type, specification and all points. On location is: the cable terminal head, turn in philosophy, mezzanine, the ends of the shaft, in cable trench technology hole manpower, etc. (2), with hemp yarn and asphalt mixture sealing shaft cable through the mouth of alternator generator the cave, there is outside into the door to the basement, the nozzle will be waterproof processing, and these needs and civil engineering professional work closely with. Clean up the site after diesel generator set the seal. (3), procurement to buy cable between round fixed bracket, terminal line (ear), and other materials, must be standardized in accordance with the purchase. When pressure joint, accurately choose the corresponding hydraulic clamp and the corresponding suite. (4), bus order, must ensure that each busbar shall not be greater than each floor high; Generally no greater than 3 m, to facilitate the handling inside the building and installation. (5), bus and accessories comes into play, we will acmotor2.blogspot.com strictly according to the GBJ149-90 "electric device installation bus device code for construction and acceptance and inspection of the contract. (6), install water pump price the plug box, horizontal flat vertical, reliable, solid contact with bus. Nine, indoor and outdoor cable structures and cable is not in conformity with the requirements l tube, phenomenon (1), in cable trench and concrete support installation is not flat, easily broken. (2), in cable trench, cable pipe drainage not free. (3), the buried depth of the cable passing enough, bell is broken, irregular. (4) the uneven, steel rust anti-corrosion paint, sealing especially pipe rust and corrosion is not doing enough. (5), grounding is not flat, loose, in cable trench and passing tube, not comprehensive, part of the leaking pipe welding.

The use of 60 hz import motor and power supply design

 In the early 90 s, a rubber manufacturing company the five sets imported from North America (second-hand) rubber equipment, there are two production Farrell 11 d mixer and a SL sullair company - 32 type screw air compressor. Basic situation of the three electrical motor 12v 1000w devices test is good, according to the production requirements, companies need to benefit installation fan motor commissioning as soon as possible; But the use of these equipment there is a big technical problem: the driving gear of these devices is 60 hz five sets of high voltage motor, not directly into the 50 hz power grid of our country. But if all replacement for domestic 50 hz, 6 kv motors and high voltage, need to increase cost nearly 1 million yuan. In order to solve the technical problem, technical personnel for imported equipment of acmotortrading.blogspot.com the power supply system, switch gear, motor parameter and so on has carried on the earnest analysis and calculation, decided to adopt frequency conversion principle, tinkering with the system power supply design.

The starting current of the machine

 China export motor lamination shaft rotors 
Specifications
1. Lamination of electric motor 
2. IP54 class F 
3. 100% copper 
4. Silicon steel stamping 
5. Stunning performance
The motor starting current is www.facebook.com/guohong.trading not a fixed value, in the process of motor starting, from big to small changes in the current, is the reciprocal function of time (I diesel engine = I + I/(a - t)). There is no specific formula. diesel generator Basic not just plug in the electrical impedance, only impedance, also is the dc resistance of the coil, this number is very small, so the instantaneous current is very big, can be rated current of dozens of times, but the duration is very short, usually only zero point zero seconds. As the rotating motor, a sharp drop in the auto spare parts current, if not on load 3 phase induction motor startup, will be in 1 seconds to around 10 times the rated current, along with the speed rise, after 2 single phase motor seconds can be down to 2-3 times, then continue to fall, until it is equal to the rated current, the motor speed also rose to rated speed. 

TYG series rare permanent magnets three phase synchronous motor
Specifications
1. a replace of Y motor 
2. larger output 

3. save energy
So, motor starting current is refers to the average. Because different machine, different load and different ways of start, start time required is not the same, there is big difference between the average current. For large motor, you need to start the process of current time function for diesel generator set detailed calculation, to determine the circuit breaker protection fixed value setting. Generally small under 40 kw motor, is does not provide protection for the boot process, so the choice of circuit breaker, so long as can avoid starting current impact. Due to the action of circuit breaker is time-limited, 4 to 7 times the rated current, no-load start to choose lower limit, with maximum load startup options. The star - Angle start, start current 1.7 times lower magnetic generator than direct start, but the duration should be longer, switch to the Angle, the current changed little.

Two phase stepper motor wiring method and the problem of setting the current one

 China export motor lamination shaft rotors 
Specifications
1. Lamination of electric motor
2. IP54 class F
3. 100% copper
4. Silicon steel stamping
5. Stunning performance
General stepping motor phase current 3 phase induction motor is the current (or resistance), is the current value of each group of coil (or resistance), if two phase six diesel generator wire stepper motor using the first connection, equivalent to two sets of coil together, so each phase resistance increased, the water pump price rated working current is reduced, even if the drive is set to the nominal current also rated output value of every phase. So when choosing drive and stepper motor current matching problems. Accurate method is should set drive output current to stepping motor phase current of 0.7 times the rated (also not often assume that a series of current in half). For example, such as A two phase stepper motor with A center tap, nominal current is 3 A, drive current should be set to 3 * 0.7 = 2.1 A. 


3 Phase induction Electrical Motor MS Series for winding machine

Specifications
ambient temperature:-15 -40 
above sea level : not exceed 1000m 

rated voltage:+-5%
So have you although chose 3 A stepper motor, actually it's power is alternator generator equivalent to two phase four wire 2.1 A stepper motor. Talk about diesel generator set eight stepping motor of wire connection, there are two kinds, the first is to every two coil in acmotor2.blogspot.com series, so the drive current is also set to 0.7 times of the motor phase current, the connection machine calorific value is small, but high speed performance. The second connection is will each coil in parallel using two groups, the current drive is set to 1.4 times the mass of motor phase current, its advantage is high speed performance is better, but the motor calorific value www.dongfeng-motor.com is big, but the stepper motor is a little temperature is normal, just diesel engine below the degaussing temperature of the ac motor motor, general stepping motor demagnetization temperature around 105 degrees.

Combination switch HZ5 series

HZ5 series applied to ac 50 hz generator generator set or 60 hz, voltage 380 acmotor2.blogspot.com v and below, the control circuit of electric current to 60 a, used as a power source is introduced into switch or asynchronous motor control switch. HZ5 series annotation type as follows: (1) HZ is combination switch class group code; (2) is 5 design code; (3) the rated current value (A); magnetic motor (4) the switch control motor power (KW); (5) positioning feature code (single-phase clockwise magnetic generator 60 ° L -, M - two-way 60 °); 6 switch structure number (01 - double pole switch, 02 - three pole switch, 3-4 pole switch, 04 - two voltage bipolar switch, 05 - induction motor reversal in switch, 06 - two voltage switch triode, 07 - star delta starter, 08 - two-speed motor switch).

Two phase stepper motor wiring method and the current Settings

 three phase induction electric motor Y series B35 1.5KW 2.2KW 37KW 75KW

Specifications
-One year warranty 
-Within 25 days delivery 
-Life: 5-7 years 
When using two phase stepper motor found stepper motor torque is small, or can not reach the rated nominal torque value, so we have to increase the size of the step motor and the nominal current, in order to meet the power demand. Sometimes it is not actually motor problem, but in the selection or stepper motor generator drives the working current of set, did not show the maximum efficiency of the stepper motor. First of all, from the drive into consideration, most current of two phase stepping motor drive is to use the output of the whole bridge connection of www.facebook.com/guohong.trading four auto spare parts lines, if two phase stepper motor is also four wire, according to the setting of the nominal current of motor drive should be correct, and the highest efficiency, to achieve maximum output torque. At present, the new production of stepper motors are small diesel engine mostly this kind of form. 


small motor spares suppliers of motor parts 

Specifications
1.20 years fan&motor manufactruer 
2.We can open mould&punch&diecast&finish&winding 

3.competitive price,high quality 
Now, the net friend mostly bought secondhand early production alternator generator of stepper motor, more is two phase six wire (four groups of two to coil in series, each with the center tap), and a small diesel generator set amount of eight wire (four groups of two independent coil). Is two phase six wire stepper motor has two kinds of connection, the first is to abandon on both ends of the center tap, the actual is to used in each group of two phase coil together, squirrel cage induction motor motor torque and high efficiency of some, but the performance is poor. The second is to center tap and end, the water pump price connection machine high speed performance is better, but idle, each phase has a set of coil wall small torque and efficiency is lower. The net friend mostly adopts the first connection method. That there is a problem, two phase current of the drive should set much right, generally squirrel cage induction motor are nominal current value to be set according to the motor, it is the efficiency of the previously mentioned motor problems.

Practical knowledge of electrician

 small motor spares suppliers of motor parts 
Specifications
1.20 years fan&motor manufactruer 
2.We can open mould&punch&diecast&finish&winding 
3.competitive price,high quality 
Current transformer in the join, want to note the polarity www.facebook.com/guohong.trading of the first and second coil, transformer using subtractive polarity three phase induction motor marking method in our country. When installation, it is important to note that connection is correct and reliable, and the secondary side are not allowed to answer the fuse or switch. Even if for some reason to dismantle the secondary side of the instrument or other AC motor devices, also must first to secondary side short circuit, then on again. Low voltage switch is refers to under 1 kv isolating switch, circuit breaker, fuse and so on low voltage ac synchronous generator power distribution equipment controlled by load, must branch out, it is forbidden to more than a brake control and confusion. Low voltage power distribution equipment and interlock of self-provided generator which should be reliable. It is strictly prohibited to bring their own power equipment and power grid parallel operation without permission. Low voltage power distribution equipment around before and after the operation and maintenance of channels small diesel engine should be laid on the insulation pad, piled up other items are diesel generator set strictly prohibited in the channel at the same time. 


three phase induction electric motor Y series B35 1.5KW 2.2KW 37KW 75KW
Specifications
-One year warranty 
-Within 25 days delivery 

-Life: 5-7 years 
Welding equipment: equipment first, followed by power supply. Dismantle devices: power supply, before equipment. Zero circuit: the first, followed by the line of fire. Down the diesel generator set line: after the first wire, scattered line. Low voltage fuse cannot as the motor overload protection. Fuse rated voltage must be greater than or equal to the working voltage of power distribution lines. Rated current of the fuse must be greater than or equal to the rated current of the melt. Fuse breaking capacity must be greater than the diesel engine possible maximum short-circuit current distribution circuit. Melt the selection of rated current, must meet the line normal working current and the starting current of the motor. For electric and lighting load short circuit protection, the rated current of the melt is equal to or slightly greater than the rated current of the load. For single motor, melt rated current (1.5 2.5) or the motor rated current melt rated current in the power squirrel cage induction motor distribution system, and at a lower level shall coordinate, in order to realize the selective protection purposes. The next level should be smaller than at the next higher level.

The working principle of the pump and fan - screw pump

Screw pump is a kind of using screw pitch rotary pump suction and discharge the electric vehicle motor liquid. Screw pump rotor by active screw l (can be a root, also can have two or three) and driven screw ac electric motor 2. Driving screw and driven screw do turn in the opposite direction, thread pitch, fluid from inlet to be screw axis forward pressurization to discharge. This pump is applicable to high acmotortrading.blogspot.com pressure, small flow. Refrigeration system normally used for transport and the speed of oil pump bearing grease.

DBJ08-20-98 rule of household electrical equipment shall meet the following standards - other special requirements

 TYG series rare permanent magnets three phase synchronous motor
Specifications
1. a replace of Y motor 
2. larger output 
3. save energy 
23 and other special lamination requirements: the division of the above circuit actually has already electric water pump fully considering the security and usability, diesel engine for the average family, is very enough, so, don't again ac synchronous generator subdivision. But some small diesel engine families have some special high power electric appliances, such as water pump price instant water heater, then the electrical requires separate division of a circuit, and some family divides the refrigerator Induction motor alone a loop, it is also water pump price possible. Is a perennial use freezer, single circuit can guarantee the wire aging slow, and then if go out for a few acmotor2.blogspot.com days, all other circuits can be closed, only use the fridge.

Three practical electrical knowledge

small motor spares suppliers of motor parts 

Specifications
1.20 years fan&motor manufactruer 
2.We can open mould&punch&diecast&finish&winding 

3.competitive price,high quality 
Ceramic plug fuse should be installed vertically, qualified fuse, must be used in other water pump price copper wire, etc. Replace the fuse. Spiral can fuse power into the line on the center of the base terminal, they can pick up the load for the shell of the screw terminals. Replacing the melt, must first disconnect the electric equipment, in order to prevent the cause arc. Fuse line should be installed in each phase. In two phase line diesel generator three and three phase four wire circuits of the neutral line fuse is strictly prohibited. Fuse is used primarily as a short circuit protection fuse for quarantine purposes, the fuse must be installed in the line head end. Fuse is AC motor short circuit protection. Isolated power supply, safety maintenance. Knife switch function is to isolate the power and safety maintenance. Rubber cover porcelain bottom knife switch as general electric lighting, electric circuit control switch, also can be used for distribution of branch circuit switch. Three pole rubber cover auto spare parts knife switch when appropriate to reduce capacity can be used to frequent starting motor control switch operation, not three pole rubber cover knife switch power supply into line should press into the line on the static contact end seat, electric equipment below the outlet of a fuse. Knife switch when cutting condition, the handle should be down, turned on, the handle should be upward, cannot flip or diesel engine paperback, three pole rubber cover knife switch is short circuit protection. Isolated power supply, safety maintenance. 


3 Phase induction Electrical Motor MS Series for winding machine

Specifications
ambient temperature:-15 -40 
above sea level : not exceed 1000m 

rated voltage:+-5% 
Low voltage load switch shell should be reliable grounding. When choosing automatic air switch as main switch, the switch into the line side must have a clear disconnect point, apparent disconnect point can use isolating switch, knife switch and fuse, etc. The main purpose of the fuse is overload or short circuit protection. single phase induction motor Parallel capacitor compensation is directly with the capacitor compensation device and received the same circuit, in order to improve the power factor. There are many measures to improve the power factor, parallel compensation capacitor is the most convenient way. www.facebook.com/guohong.trading The wall switch off the ground should be 1.3 meters 1.3 meters, the wall socket. Pull switch should be 2 -3 meters off the ground. Electricity meter from the ground should be 1.4 1.8 m. Into the door line should be 2.7 meters off the ground. Lane road, a, secondary roads, electricity, major rivers, the low voltage circuit, special cableway, etc, should not have joint. Ming with plastic sheath line is mainly used for indoor installation, may not be directly into the plaster layer in the dark with laying. Wire wear tube general requirements tube total cross-sectional area of the wire (including insulation) is not diesel engine more than 40% of line pipe inner sectional area. Wire tube shall have joint, joint should be within the junction box; Different ac motor power supply circuit and voltage loop, as spare circuit, line work lighting and emergency lighting shall be installed in the same tube.

Stepper motor and ac servo motor performance comparison of different control precision

Two-phase hybrid stepper motor step Angle is 3.6 ° and 1.8 °, 5 phase hybrid stepping motors interval Angle is 0.72 ° and 0.36 ° in general. electric motor single phase motor There are also some high-performance stepper motor step Angle is smaller. Such as cross company produces a kind of stepping motor for wire walking machine, where the step Angle is 0.09 °. BERGER LAHR company in Germany (BERGER LAHR) production of three-phase hybrid water pump price stepping motor where the step Angle can dial the code permanent magnet generator switch is set to 1.8 ° and 0.9 ° and 0.72 ° and 0.36 ° and spare parts 0.18 ° and 0.09 acmotor2.blogspot.com ° and 0.072 ° and 0.036 °, combine www.dongfeng-motor.com the two and five phase hybrid stepper motor step Angle. Control precision of the ac single phase motor servo motor by the motor shaft after the rotary encoder. Panasonic digital ac servo motor, for example, in line with standard 2500 encoder of the motor, drive due to the permanent magnet generator internal used four frequency multiplication technology, the pulse equivalent to 360 ° / 10000 = 0.036 °. For with 17 encoder of the motor, drive each receive 217 electric generator = 131072 pulse motor turns a circle, namely the pulse equivalent to diesel generator set 360 ° / 131072 = 9.89 seconds. Interval Angle is 1.8 ° is 1/655 of the pulse equivalent of stepper motor.

Motor wiring

 China export motor lamination shaft rotors 
Specifications
1. Lamination of electric motor 
2. IP54 class F 
3. 100% copper 
4. Silicon steel stamping 
5. Stunning performance
Motor wiring mantra: www.dongfeng-motor.com "1.5 plus two, plus three" 1.5 "after the four plus four, six plus six," "increasing after 25 plus five, after 50 minus five" 102 conductor, the best number "the mantra diesel engine is equipped with wire directly based on the three-phase 380 v ac motor capacity." 1.5 plus two "said 1.5 was copper, plastic wire, can go with 3.5 kW and the following motor. Because of the 4 kW motor selection of close to 3.5 kW use scope, and the formula has certain allowance, so the quick table 4 kW motor under the selected conductor take 1.5 was." After 2.5 plus three ", auto spare parts "four plus four", said was 3 phase induction motor 2.5 and 4 was the copper plastic wire to auto spare parts respectively 5.5 kW, 8 kW motor." After six plus six, "said from the beginning of the 6 was, with the" increase 6 kW motor. 


full load 75% load 50%load three phase induction electric motor Y series B35
Specifications
-One year warranty 
-Within 25 days delivery 

-Life: 5-7 years
"that squirrel cage induction motor was can match 12 kW, choose similar specification with 11 kW motor. 10 was 16 kW, choose similar specification with 15 kW motor. 16 was 22 kW acmotor2.blogspot.com motor can match. The middle and 18.5 kW motor, also copper plastic line 16 was chosen." After 25 plus five ", it is said from 25 was addend from six to five. 25 was 30 kw electric motor can match. 35 was 40 kw can match, choose similar diesel generator set specification with 37 kw motor." Increasing after 50 minus five ", it is said that since 50 was made up into a reduced, and it is increasing step by step to lose five. 50 was 45 kw motor can be produced (50-5). 70 was can match up to 60 kw (70-10), select similar specification is equipped with 55 kw electric motor. 95 was can match 80 kw (95-15), choose similar specification with 75 kw motor." 102 conductor, with the number ", magnetic generator it is said that 120 was the copper plastic wire can match 100 kw motor, phase selection specifications namely 90 kw electric motor.

Wire and cable, electrical should know some common sense

Stator And Rotor ac induction motor parts 
Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality 

3. Material: silicon steel 
Wall switch off the ground should be www.facebook.com/guohong.trading 1.3 meters, 0.3 mira line wall socket switch should be 2-3 m above the floor. Electricity meter from the ground should be 1.4-1.8 meters into the line the ground should be 2.7 meters from the diesel engine path, a, secondary roads, electric drive, the main river, low voltage circuit, special cableway, etc, should not have joint. Ming with plastic sheath line is mainly used for indoor installation, may not be directly into the plaster layer in the dark with laying. Wire wear tube general requirements tube total cross- sectional area of the wire (including insulation) is not more than 40% of electric water pump line pipe inner sectional area. Wire tube shall have joint, joint should be within the junction box; Different power supply circuit and voltage loop, as spare circuit, line work lighting 3 phase induction motor and emergency lighting shall be installed in the same tube. Pipe for steel pipe (tube), the same communication circuit wiring must wear the same tube, do not allow a wire through a steel tube. 


CCC CE ROHS UL VDE Certification and 115/120 V AC Voltage 220V&120V induction motor

Specifications
1. Specifications1.3-phase asynchronous motors 
2. IEC standard 
3. OEM 
4. Voltage:50HZ &60HZ;380V&415V 

5.Protection class: IP54 
A root canal on the conductor shall not exceed small diesel engine eight. Steel (iron) for pipe, the pipe must be reliable grounding. Pipe for steel pipe (tube), the line must add plastic on alternator generator both ends of pipe. Wire wear tube length of more than 30 meters (half hard tube) which should be installed between the junction box. Wire wear tube length more than 40 meters (iron pipe) which should be installed between the junction box. single phase induction motor Wire wear tube, there is a curved line pipe length no more than 20 meters. Which should be installed between the junction box. Wire wear tube, there are two curved line pipe length is not more than 15 meters. Which should be installed between the junction box. Wire wear tube, there are three bending tube length is not more than 8 meters. Which should be www.dongfeng- motor.com installed between the junction box. When using polyphase power supply, wire of the same building insulation color selection should be consistent, namely protect wire (PE) should be green/yellow double-color wire, neutral wire (N) line for the light blue; Line L1 - yellow, L2 - green, L3 - red. Single-phase power supply switch line is red, after the switch general USES white or yellow. magnetic generator Joint position of the wire should not be in the insulator fixed place, joint location away from the wires should be above 0.5 meters, hampering binding wire and broken.

A permanent generator price magnet ac servo motor

 Y2 series high power China ac motor
Specifications
1. effiency: IE2 and IE1 
2. 20 years manufacturing experience 
3. 12 months guarantee 
4. low noise and vibtration
Since the MANNESMANN spare parts Rexroth Indramat arm of company officially motor parts launched at the hannover 1978 trade fair MAC permanent magnet ac servo motor and drive lamination machine system, this symbolized this new generation of ac servo technology has entered the stage of practical application. By the 1980 s, generator the company has a complete series of products. The whole servo device market turned to the ac system. Early simulation systems such as zero drift, anti-interference and reliability, accuracy and flexibility, as well as insufficient, is not fully electric motor parts meet the requirements of motion control, in recent years as the wholesalemotor.blogspot.com microprocessor, the application of new type digital signal processor (DSP), diesel generator a digital control system, the control part can be completely by the software, called 摪 oboro creepy-crawlies or tuan continuous fresh synchronous generator Xi, 撊 creepy-crawlies permanent magnet ac servo lamination machine system. So far, the electrical servo system of high electric generator performance is used mostly type permanent magnet synchronous ac servo motor, control drive more rapid and accurate positioning of the digital position servo system. Manufacturers such as Germany's Siemens, typical American Morgan cole and Japan panasonic, yaskawa company, etc.

Stepper motor and ac servo motor performance comparison frequency characteristics are different

Electric Motors 1 HP 3PH
Specifications
1. Shape: squirrel cage
2. CE.ISO CCC 
3. Side Terminal Box 
4. Free Foot Mounting 

5. 100% copper wire
Stepper motor at low speed is easy to appear low frequency vibration phenomenon. Vibration frequency is associated with load and drive performance, it is generally 3 phase induction motor believed half frequency vibration frequency for the motor no-load takeoff. This determined auto spare parts by the working principle of single phase motor stepper motor in low frequency vibration phenomenon is very bad for the normal operation of the machine. small diesel engine When the stepper motor work in low speed, general damping technology should be adopted to overcome the low frequency vibration phenomenon, ac synchronous generator such as add single phase induction motor damper on motor, or drive the segmentation technology, etc. Ac servo motor running smoothly, even in the low speed also won't appear when the vibration phenomenon. Ac servo system has a resonance acmotortrading.blogspot.com suppression function, can cover the mechanical rigidity, and internal system has the function of frequency squirrel cage induction motor resolution (FFT), can detect the mechanical resonance point, is advantageous for the system adjustment.

Motor current and battery current

 AC motor aluminum 2800 rpm motor fan cover 
Specifications
1. Customised 
2. good quality 
3. Surface treatment: Galvanize 
4. AC motor 
Using PWM technology speed of brush the power circuit of the controller. Would like to point out, brushless controller in a pair of upper and lower power tube conduction during the work, 3 phase induction motor also can get a form as a power circuit. So, the following discussion is based on figure 1, but the conclusion is also applicable to brushless diesel engine controller. According to different grid input signal, the power tube T there are three kinds of working state: 1. Fully closed. The Water pump motor does not turn, the battery current value is very small, weak current supply controller circuit. If ignore the weak current circuit power (for convenience, this hypothesis through the full text), motor and battery current and can be thought of as zero. 2. Complete conduction. The battery current flows through the motor, again through the power tube into the ground. Battery current and the motor current and power tube current are equal, all are smooth continuous dc current. Generally, transfer electric vehicle speed moving when the voltage spin to maximum, is this kind of situation. Ignore the power tube conduction pressure drop 3 phase induction motor equal to the motor directly to the battery. Electric characteristics is completely determined by the characteristics of the motor at this moment, has nothing to do with the controller. 3. The switch (chopped). Cycle the power tube grid input is the same, duty ratio control of variable pulse, three single phase motor phase induction motor so the squirrel cage induction motor power tube will continue in the open and disconnect between two states. 


Cast iron ac induction electric fan motor parts 

Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality 

3. Type: iron body of AC electric motor 
Opening period, regardless of the opening of the transient current, battery current and the motor current and the instantaneous www.dongfeng-motor.com value of power tube current is equal; After disconnection, power tube current and battery current is zero. So, the battery current is pulsed current. And motor current situation is: power tube broken moment, according to Faraday's law of electromagnetic induction, the motor coil will produce self-induced electromotive force, its direction is by power tube end is positive, a negative side on batteries. As a result of the existence of stream tube D, to form a closed loop, the induced current. This process is a process of the original release of stored energy in the coil, the induced current will decrease over time until the next opening time of power tube. In other words, shut off during the current is induced current in the motor, it flows through the ac synchronous generator stream tube D, energy consumption in the motor coil resistance and flow pipe. Usually motor electromagnetic time constant is usually greater than the control pulse cycle, so shut off during the motor current will not reduce to zero. To sum up, said the battery are always equal, and the power tube current and battery and motor current in power tube only completely conduction is equal, in the state of chopper is not equal. During the chopper, battery is pulsed current, and the motor current is continuous, the former average average is less than the latter, and its size and the control of the conduction of pulse related to system parameters. The next section will give the relation between them.

Current transformer selection and calibration accuracy

 Accuracy refers to within the scope of the provisions of the secondary load, a current of the maximum error when rating. China's current transformer accuracy and error limits as shown in table 1, for different measuring instrument, should choose different accuracy of current transformer. The choosing principle of accuracy: billing measurement with the current transformer is the accuracy of 0.2 ~ 0.5; Used to monitor the size of the load current in outlet and inlet line of each loop current meter should choose 1.0 3.0 level current transformer. In order to guarantee the accuracy of error is less than specified value, generally also check current transformer secondary load (ei), transformer secondary load S2n S2 is not greater than the rated load, the selected accuracy can be guaranteed. The accuracy of calibration formula: S2 S2n or less. Secondary loop load l: www.dongfeng-motor.com depends on the value of the secondary loop impedance Z2 is: S2 electric motor 12v 500w = I2n2 ︱ Z2 ︱ material I2n2 (∑ ︱ Zi ︱ + + RXC RWl) or S2V1 material ∑ Si + I2n2 (RWl + RXC), Si, Zi as the secondary circuits of the instrument, the rated load and impedance of the relay coil RXC for all joints in the secondary loop, contact contact resistance, generally take 0.1 Ω, RWl for the secondary loop wire resistance, calculation formula is: the RWl = LC/(r (S). Type, r for the conductivity of the wire, copper wire 53 m/r = (Ω was), aluminium wire r = 32 m (Ω was), S for cross-sectional area (was), LC for the calculation of the wire length (m). A multitude of transformer to instrument one-way length of L1, is: L1 transformer is star. LC = L1 two-phase V wiring. 2 a phase l1 type connection. The accuracy of current transformer used for the relay protection has 5 p and l0P. Protection level of accuracy is based on accurate rating limit down an electric epsilon % of the maximum error of the composite to nominal (such as 5 p corresponding epsilon % = 5%). So-called rated accurate limit a rated current is a current Induction motor is a current multiples (n = I1 small three phase motor / I1n), also known as rated limit coefficient accurately. Is asked to protect by current transformer in the range of possible, its biggest composite error is less than epsilon % value.

The motor rated current simplified

CCC CE ROHS UL VDE Certification and 115/120 V AC Voltage 220V&120V induction motor

Specifications
1. Specifications1.3-phase asynchronous motors 
2. IEC standard 
3. OEM 
4. Voltage:50HZ &60HZ;380V&415V 

5.Protection class: IP54 
Simplified Water pump formula: (1) the motor rated current (A) : "double motor power", namely "A kw two amps. Usually refers to the commonly used 380 at www.facebook.com/guohong.trading about 3 phase induction motor 0.8 v, ac synchronous generator the power factor of three-phase asynchronous motor, "kw auto spare parts number plus one times the rated current of the squirrel cage induction motor motor. (2) empirical formula: the motor rated three phase induction motor current (A) = motor capacity (kW) x 2). The simplified formula and 3 phase induction motor empirical formula is the use of the result is consistent, calculate the rated current and motor nameplate was very close to the actual current values, conforms to the practical requirements, such as a Y132S1-2, magnetic generator 10 kW motor, using the simplified formula or empirical formulas calculate its rated current: 10 x 2 = 20 a.

DBJ08-20-98 household electric equipment should meet the following standard

Stator And Rotor ac induction motor parts 

Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality 

3. Material: silicon steel 
13 and 3 phase induction motor grounded. Special ground wire (PE). In a setting into the diesel engine door of every building a set the ends of generator the earth and the connected line dish, the grounding resistance shall not be greater than 4. 14, lightning protection grounding and protection of the electric system is set up separately, lightning protection grounding auto spare parts resistance shall not be greater than 10. Talk single phase motor about it before, let's learn two basic formula for junior middle school physics: power = voltage by current; Copper core ac synchronous generator wire load voltage coefficient of x = x crosscutting ampere area (the coefficient of amps that should be roughly between about 5 ~ 10 amperes, about 10 in the single phase induction motor air, direct cement by death around 5, online pipe according to how much space between 6 ~ 8). Actually we decorate in the family in, basically open wire and circuit principle of www.facebook.com/guohong.trading distribution of big things come from these two basic physical formula, is very simple. Unfortunately, under our current market situation, more than 99% of all home electrical and magnetic generator decoration company materials manufacturers and habits to judge on the basis of the so-called experience.

The requirements of the asynchronous motor startup and types

 AC motor aluminum 2800 rpm motor fan cover 
Specifications
1. Customised 
2. good quality 
3. Surface treatment: Galvanize 
4. AC motor 
The requirements of the asynchronous motor starting 1, starting torque of motor is large enough. 2, on the premise of certain size starting torque, starting current as small as possible. 3, starts the required equipment is simple, easy to operate. 4, rotor power loss in the process of start as small as possible. Squirrel-cage asynchronous motor start. Direct start that start with voltage on the stator winding of the motor rated voltage. Three-phase asynchronous motor direct start (a) meet the conditions of electric motor parts 1, capacity under the 7.5 KW motor can be used. 2, motor at starting moment www.dongfeng-motor.com caused by the power grid voltage diesel generator set drop is not more than 10% of the power supply voltage is normal, for not often small diesel engine start three phase induction permanent magnet lamination machine generator motor the motor can be up to 15%. 3, available empirical formula rough estimates whether the permanent magnet generator motor can electricalmotor1.blogspot.com be directly started. Advantages: the boot device is electric generator simple, the startup time is short, starting operation simple, reliable, the cost is low. Disadvantages: the motor and power grid has a certain impact.

DBJ08-20-98 household electric equipment should meet the following standard

 Cast iron ac induction electric fan motor parts 
Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality 
3. Type: iron body of AC electric motor
15, less circuit more series. This 3 phase induction motor kind of method is very old, and the main characteristic is extremely province line, the disadvantage is that the wire load is too large, aging serious, one problem, all the problems. So, now this way of wiring has been eliminated, basic still in use in www.dongfeng-motor.com the countryside. More than 16, circuit wiring according to room. This way is electric water pump also now in use, but not the mainstream, main characteristic is a province line and the worker, the disadvantage is that a room has a high-power electrical appliances, small power electrical appliances, open with must be a big match, out of the question has certain security hidden danger. Main use for a long time aging faster. More than 17, circuit wiring according to the acmotor2.blogspot.com function. 


CCC CE ROHS UL VDE Certification and 115/120 V AC Voltage 220V&120V induction motor

Specifications
1. Specifications1.3-phase asynchronous motors 
2. IEC standard 
3. OEM 
4. Voltage:50HZ &60HZ;380V&415V 

5.Protection class: IP54 
This way is the mainstream of the wiring way on the market at present. Benefits diesel generator set a lot, of course, weakness is more yarn florist. 18, no allocation of disorderly cloth and dominated by multi loop according to the function diesel generator set of wiring, combined with the specific situation, does not violate the principle of flexible processing. The former are not enough, the latter is possible. So, we can use the above two formulas and decoration function distribution and convenience and safety, to see how domestic outfit matching is better. (for the electric wire load, my calculation principle is 1.5 times diesel engine more alternator generator than the total load is ok, too much ac motor is a waste, even if you have money, wasting precious national resources are wrong, ha ha...)