PID principle - step response

Step response is a step input (step function) added to Water pump the system, the fan motor output of the system. Steady-state error refers to the AC motor response of the system after entering the steady stator state, the difference between generator set the desired output ac induction motor and the generator actual output of the system. The performance of the control system can be used to steady, accurate, quick three words to describe. Stability refers to the stability www.facebook.com/dongfeng.motor of the system (stability), a system to work normally, first of all generator ac synchronous generator must be stable, look from the step response should be permanent magnet motors for small diesel engine sale convergence; quasi refers to the accuracy of the control system, control accuracy, usually use the Steady state error to (Steady - state error), which represents the system output steady-state value and the difference between the expected value; quick response refers to the control system of quickness, usually use rise time to quantitative description.

Wire and cable, electrical should know some common sense

 induction motor rotor electronic parts 
Specifications
1.20 years manufacturing experience
2.competitive price,high quality
3.Delivery Detail:within 10 days after receiving deposit
Three-phase five wire with color yellow, green, red, 3 phase induction motor light blue, respectively the U, V, W, N protective earthing line double color (PE) transformer in operation, diesel generator each transformer phase current should not exceed rated current; The maximum unbalance current shall not exceed 25% of the rated current. Transformer generator operation should be performed periodically maintenance. The same transformer power electric water pump supply system, unsuitable mixed protective earthing and protection by zero. The voltage transformer secondary coil normally rated voltage 100 v. Secondary side of voltage transformer at work may not be short circuit. Due to short circuit will produce a lot of short acmotor2.blogspot.com circuit current, may burn out transformer, voltage transformer for this time, secondary side are installed fuse protection. 


Totally Enclosed Protect Feature and Three-phase Phase low rpm ac electric motor

Specifications
1.IEC standard 
2.OEM 
3.Voltage:50HZ &60HZ;380V&415V 
4.Protection class: IP54 

5.Packaging Details:80-112 carton box 132 and above ply wooden box
Secondary side of voltage transformer must be grounded at one end. This is to prevent the secondary coil insulation breakdown, a high pressure into the secondary side, endanger the safety of person and diesel generator set equipment. Current transformer secondary side close to the short circuit conditions at work. Rated current of the secondary coil is commonly 5 a current transformer secondary side is not allowed to open at work, current transformer secondary side must be grounded at one end, to prevent the first and second coil insulation breakdown, the side of a high voltage into the secondary side. Current transformer in diesel engine the join, want alternator generator to note magnetic generator the polarity of the first and second coil, transformer using subtractive polarity marking method in our country.

The choice of motor with contactor

3 Phase induction Electrical Motor MS Series for winding machine

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

rated voltage:+-5% 
Contactor shall be chosen principle: (1) by using the categories to choose: in the actual production, the water pump vast majority of cage motor use, diesel engine basic belongs to the category is chosen according to AC - 3 use. (2) to determine the level of capacity: the capacity of the contactor or main contactor under rated voltage 3 phase induction generator motor and other technical conditions, the determination of the rated current, attention should be paid to the following points: 1) the influence of duty and working frequency: when choosing contactor, attention should be paid to the control object is a long-term work week, or repeat short work. In the operating frequency is high, but also increase squirrel cage small diesel engine induction motor the contactor of the rated current capacity must be considered. Should as www.dongfeng-motor.com far as possible choose silver, silver or silver contact contactor, such as the KSDZ - U series products. 2) the influence of environmental conditions: production process environment is bad, dust pollution is serious, poor ventilation, and higher temperature in the workplace. To the choice of contactor should be taken down, let the use of technical measures. ac synchronous generator Contactor for rated current of the quick: watch a Y180L - 4, 2 kW motor, for example, from a quick table should check with U60 type contactor. The motor rated current 60 a, rated current 60 a contactor, according to the general AC alternator generator - 3 work category, the contactor to control power of 30 kw 380 v motor, control 380 v 22 kw motor, now belongs to let use reduction.

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.

Separated out type motor

electric motor stator rotor lamination motor parts 
Specifications
1. Lamination of electric motor 
2. IP54 class F 
3. 100% copper 
4. silicon steel stamping 

5.stunning performance 
 It adopts flame-proof case may produce a spark, arc and dangerous temperature of the electrical part is separated from the explosive gas mixtures around. However, the enclosure is not sealed, the explosive gas mixture by shell around the internal part of the joint clearance into the motor. When with spark, arc and dangerous high temperature within the enclosure contact with an ignition source might explode, at this moment the flame-proof shell the motor will not damage or deformation, flame and explosion or hot gas came permanent magnet motors for sale through joint clearance, also cannot ignite surrounding explosive gas mixture. Its main features are: (1) power level, installation size and speed of corresponding relation and DIN42673 consistent, at the electric motor price same time considering the inheritance and YB series and the interchangeability of Y2 series, make the necessary adjustments, more effective and applicable. (2) the whole series with F class insulation, temperature rise according to the assessment of class B. (3) the noise limit is lower than YB series, close to YB series of grade I noise, vibration limit and YB series. (4) motor electric improve the IP55 protection grade. (5) the whole series of choose low noise deep groove ball bearings, stand center high note oil discharge device is installed at more than 180 mm motor. (6) motor heat sink has two parallel horizontal distribution and the radiation distribution, give priority to with parallel horizontal distribution. (7) the main performance index reached the international advanced level in the early 1990 s.

3 okw motor, 380 v voltage. The power factor is 0.2, could you tell me how to calculate the rated current?

Rated current I = P30KW U0.38 KV / 1.732 * * 0.2 = 227.9081 A, but electric motor 12v 500w 30 kw motor power factor can't be so low ah, do you want to calculate no-load running current of motor. The question you ask is problematic. ac three phase motor 30 kw motor power factor should be above 0.75. If according to the capacity of current rating: I = P30KW U0.38 KV / 1.732 * * 0.75 = 60.7755 A. Teach you two formula, very useful: "capacity divided by the number of kv, dealer by coefficient of seventh. "A kw, two current" can estimate the rated current of three-phase motor. Low power factor, then the acmotor2.blogspot.com motor should be banned the example of the net. Line current of three-phase ac asynchronous motor I material 2 P, P - power, kw. I material 2 x 60 kw motor current 30 = 60 a.

Frequency conversion air conditioning variable frequency drive process

Air conditioning work, machine outside the CPU output frequency conversion control signals. In part of the process of frequency conversion output for introduction object, such as u, y, z three signals arrive at the same time, by plug CN1 access frequency conversion power diaphragm. Glowing light lotus root IC2, IC6, IC7 working at the same electric vehicle motor time. Light lotus root IC2 triode conduction, form a trigger signal uU, add to figure 7 uU work side, the upper arm tube conduction of U. Light lotus root IC6, IC7 conduction, form a trigger signal yN, zinc, and add to figure 7 yN, zinc, V, W phase under the arm two power tube conduction. Three ac motor power tube conduction, the PN dc electric fan motor power through the compressor UV, UW winding current formation, the electric compressor. 2 L1 c3 O1 I2 h8 N.C PU output "three phase six take" trigger signal, the power tube conduction in turn, can be formed in the compressor of the three-phase winding three-phase alternating current, www.dongfeng-motor.com compressor operation.

What are the components of transformer overhaul?

(1),hanging out of the body,overhaul,body (core,coil,generator generator set tap- changer and lead);(2),maintenance safety cover,oil storage tank,gas,heat pipe throttle single phase generator and casing;(3),and cooling device and oil filter equipment,(4),filter oil or oil changes,if necessary,dry processing.(5),the access control and measuring instrument,signal and protection device;6,clean up the shell,if necessary,paint;All landowners,assembly and measurement and test.

(1),hanging out of the body,overhaul,body (core,coil,tap-changer and lead);12v mini generator motor (2),maintenance safety cover,oil storage tank,gas,heat pipe throttle and casing;(3),and cooling device and oil filter equipment,(4),filter oil or oil changes,if necessary,dry processing.(5),the access control and measuring instrument,signal and protection device;6,clean up the shell,if necessary,paint;All landowners,assembly and measurement and test. Advantages of wound asynchronous motor can be through the collector ring wholesalemotor.blogspot.com and brush,plus resistor in series with the rotor loop,to improve the starting performance and can adjust speed change and resistance within a certain range.But the wound,more complicated than the squirrel- cage asynchronous motor structure,poor reliability of the movement of the price is more expensive.

The output frequency

The output frequency is describe the car power output voltage frequency.We use mains is alternating current (ac),frequency of permanent magnet generator 50 hz,so we want to car power electrical motor can also provide the same frequency of alternating current (ac),the current general car power can meet the demand,that is to say,the output motor run capacitor frequency is 50 hz.The same as the output voltage,output frequency will fluctuate within a certain scope,the range as small as possible,the range in practical use is in commonly 0.1 Hz.In addition some special car power output is the electricalmotor1.blogspot.com direct current,output frequency is zero,so the car power of generally used for special purposes,such as notebook car power dedicated to a certain type of notebook.

Voltage current transformer model meaning

Capacitive voltage transformer (CVT),in 1970 developed the domestic first 330 KVCVT,1980 and 1985,developed fan motor the first generation and second acmotortrading.blogspot.com generation KVCVT 500,1990 and 1995,developed the third and fourth generation KVCVT 500,more than 30 years has accumulated rich 12 volt electric motor experience in scientific research,development,design and production,in the domestic developed generation after generation of CVT new products,three phase induction motor giving impetus to the development of the domestic CVT.CVT's main features are: 1.High electric strength,insulation margin is large,reliable operation.2.Reliable damping ferroresonance.Successful adoption of the new group phase,with strict quality control,ensure that the factory's every piece of CVT are under any of the voltage from low to high effective damping various ferromagnetic resonance frequency.3.Good contact response characteristics.When the second time remaining after a short circuit voltage can fall below 5% in 20 ms,especially adapted to the fast relay protection.4.Has the power grid harmonic monitoring of patent technology.

Troubleshoot general steps - equipment inspection

According to the symptoms of the analysis permanent magnet motor of the preliminary conclusion and doubt,more detailed inspections of equipment,especially those who is considered the most possible fault zone.Attention should be paid to this stage should try to avoid unnecessary disassembly of permanent magnet generator equipment,to prevent more failure caused by the operation of the indiscretion.Don't adjust control device,because under normal circumstances,the fault parameters will hide blindly and symptoms has not been ruled out,but also with the development of the fault and make the symptoms appear,and may even cause more wholesalemotor.blogspot.com serious failure.So,fans motor must avoid blindness,prevent complicate fault for not careful operation,to avoid causing confusion symptoms instead,extend the time of troubleshooting.

Three-phase asynchronous motor speed and voltage have a relationship

Simple from the formula,the rotational speed of rotating speed and voltage are theoretically

acmotortrading.blogspot.com has nothing to do,in fact change the applied voltage is affect the speed of the motor.The following description can electric motors 12 volt help understand the asynchronous motor revolutions formula n = 60 f/p * (1-s) p-logarithm,s-slip Speed regulation method 1.Change the frequency of the power supply (2) pole change motor logarithmic 5kw permanent magnet generator 3.Change the slip.Slip changes can be made of the following measures to achieve 1.2.Change the applied voltage in mini electric motor the rotor circuit introduction plus resistance (3) the introduction of additional potential in the rotor circuit.

Pole changing logarithmic speed control method

This control method is used to change the connection mode of the stator acmotortrading.blogspot.com winding to change cage motor stator polar logarithmic to achieve speed,features below:With a hard mechanical properties,good stability;No slip loss,high efficiency;Wiring is simple,convenient control,low permanent magnet generators for sale price;Have used differential is bigger,cannot obtain smooth speed regulation;Can be used with regulating speed control,electromagnetic slip clutch,5kw permanent magnet generator smooth speed electric motors pricec haracteristics of high efficiency.This method is suitable for don't need a stepless speed regulation of production machinery,such as metal cutting machine tools,elevators,lifting equipment,fan,water pump,etc.

ISO9001-2008 certification ac three phase electric motor

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