1. The number of reflect the synchronous speed of the motor, 2 pole synchronous speed was 3000 r/min, 4 pole synchronous speed was 1500 r/min, 6 pole synchronous speed was 1000 r/min, eight pole synchronous speed was 750 r/min. Winding motor vehicle spare parts the way go to form a loop, namely pole logarithm, come in pairs, extremely is the meaning of magnetic pole, the winding magnetic field when an electric current, there will be a pole. . Each group of three-phase ac motor coil produces N and S poles, each motor each phase contains the number of poles is very few. Due to the magnetic poles are paired, so the motor with 2, 4, 6, 8... Extremely. 2. If the frequency of the three-phase ac 50 Hz, the synthesis of the synchronous speed of the magnetic field of 50 r/s, which is 3000 r/min. If the rotating magnetic field of the motor is not just a pair of magnetic poles, further analysis can also get synchronous speed n. and the relationship between the logarithmic p magnetic poles: n = 60 f/p.f for frequency, the unit is Hz. N units for r/min. The ns and pick up the frequency of the alternating current (ac) (f), electrical magnetic pole has strict relationship between log (p). The ns = f/p in China, the power frequency 50 Hz, so the diode motor wholesalemotor.blogspot.com synchronous speed is 3000 RPM, quadrupole motor synchronous speed is 1500 RPM, and so on. The speed of the rotor asynchronous motor is always less than or more than its. The speed of the rotating magnetic field, asynchronous in the name of the resulting.
The difference between the rotational speed and rotating magnetic field of asynchronous motor rotor (called slip) usually within 10%. Thus, the ac motor (either synchronous or asynchronous). Speed is the restriction of the power frequency. Ac motor speed control, electrical motor therefore, is hard, the best way is to change the power frequency, whereas in the past to change the power frequency is more complex. So before the 70 s, in the required speed. Occasions, multi-purpose dc motor. With the development of power electronic technology, the ac motor frequency control of motor magnetic generator speed technology has started to get practical. 3. The synchronous motor speed = polar logarithmic x frequency (power frequency 50 hz) in our country, the asynchronous motor speed = extremely logarithmic x frequency - logarithmic * slip frequency. In addition, the same power of motor, the greater the speed, the smaller the output torque. 4) of synchronous motor pole: the large capacity of synchronous motor are turning pole type, namely the rotor magnetic pole, is produced by passing a dc excitation winding, and synchronous machine very logarithm is the logarithmic rotor magnetic pole. Eight pole motor rotor is eight pole, 2 p = 8, namely the motor with 4 poles. Steam turbine generator is non-salient pole type motor, more commonly a logarithmic rarely, generally for 1, 2, and n = 60 f/p, so his speed is high, up to 3000 RPM (frequency), and the number of hydro-generator. Quite a lot, for the salient pole rotor structure, the process is more complex, because the number of his lot, so he has a very low speed, perhaps only a few turns per second
Alibaba China Suppliers!!Export aluminum electric motor casing
Specifications
1. a replace of Y motor
2. larger output
3. save energy
4. Delivery Detail:within 30-35 days after receiving the deposit
Find converter internal dc power supply side and N and P, diesel engine dispatch multimeter to generator price resistance X10, red table bar got P, black table rods respectively in accordance generator with to R, S, T, there should electric water pump be about a few of the resistance, and the basic balance. Instead received a black watch rod P side, red table small diesel engine rods in turn squirrel cage induction motor received R, S, T, there is a close to www.dongfeng- motor.com the infinite value. Received a red table rod N side, repeat the above steps, should get the same results. We can determine if you diesel engine have the following as A result, the circuit is abnormal, a. resistance unbalanced three-phase, failure can explain rectifier bridge. B. red table welding P side bar, the resistance is infinite, can be alternator generator concluded that the rectifier bridge. Failure or starting resistance fault occurs.
Alibaba China Suppliers!!Export aluminum electric motor casing
Specifications
1. AC motor aluminum body
2. customized
3. 20 years manufacturing experience
4. competitive price,high quality
5. Packaging Details:exporting standards match exporting standards
6. Delivery Detail:within 15 days after receiving deposit
Choose fuse type and capacity, according to the protection of the load characteristics, the electric motors size of the short circuit current working conditions and use of the occasion. Most of the small and diesel engine medium-sized motor with light load or full pressure relief starting, lamination starting current is usually 5 to 7 times of the rated current; The power capacity is larger, low-voltage distribution main transformer (including capacity) in 1000 ~ 400 electric water pump kva, system impedance is small, when water pump price short-circuit fault occurs, the short circuit current is larger; The workplace such as kiln, grinding, poor ventilation condition, the working environment temperature is higher.
CCC,CE Certification and Waterproof Protect Feature ac motor
Specifications
power range: 0.12-18.5 kW
Centre height of frame: 63-160 mm
Rated Voltage: 220V
Rated Frequency: 50Hz or 60Hz
Packaging Details:80-112 carton box 132 and above plywood box
Therefore, choose fuse breaking capacity and rated current of the melt, compared with the general industrial use should appropriately increase a bit. 3.1 the melt the experience formula of the rated current melt Electric motor rated current (A) = motor rated current (A) (3). 3.2 melt rated current simplified formula: "melt protection, kw by 6" the simplified formula, is refers to a 380 v cage motors, light load starting or decompression starting full pressure, low operating frequency, suitable for below 90 kw and cage motor. If the actual use of the motor starting frequently, or starting time is long, the empirical formula or water pump price the simplified formula of the above results can be appropriately increased a little, but it should not be too large. In short to achieve when the motor starting, melt by fusing; In the case of short circuit fault, the melt acmotor2.blogspot.com must be reliable fuse, squirrel cage induction motor cut off power supply, to achieve the purpose of the short circuit protection.
The high voltage proportional relationship to transform the 100 v or lower level standard secondary voltage, for the use of protection, measurement and instrumentation. At the same time, the use of voltage transformer can be high voltage and electrical isolation. Although also be in accordance with the working principle of electromagnetic induction voltage transformer equipment, but its electromagnetic structure compared with the current transformer is just the opposite. Voltage transformer secondary circuit is high impedance circuit, the size of the secondary current is decided by the impedance of the loop. Secondary load impedance, small secondary current increase, makes a in a component of current automatically to meet electromagnetic balance of the relationship between the primary and secondary side. A voltage transformer is, as it were, structure and using a limited form of special transformer. Electromagnetic single phase motor current transformer is widely used in power system (hereinafter referred to as "current transformer"), its working principle is similar to the transformer.
The principle of current transformer wiring, as shown on the left. The characteristics of the current transformer is: (1) a coil in series in the circuit, and as a result, the number of turns in a coil current depends on the load current of the circuit under test. And has nothing to do with the secondary current; (2) current transformer secondary coil of the current meter and relay to the coil impedance is 220v 1.5kw ac motor very small, so under normal circumstances, current transformer run in to a short-circuit condition. The ratio of the current transformer primary and secondary rated current, called the rated mutual acmotortrading.blogspot.com inductance of the current transformer ratio: kn = I1n/I2n Because of one coil rated current I1n standardization, secondary coil rated current I2n unification of 5 (1 or 0.5), so the rated mutual inductance current transformer ratio have also been standardized. Kn can be approximately expressed as transformer primary and secondary winding turn ratio, namely the kn material kn = N1 N2 / type of N1, N2, for one, two coil number of turns.
Alibaba China Suppliers!!Export aluminum electric motor casing
Specifications
1. a replace of Y motor
2. larger output
3. save energy
4. Delivery Detail:within 30-35 days after receiving the deposit
Simplified formula: (1) the motor rated current (A) : "double motor power", generator namely "A kw two amps. Usually refers to the commonly used 380 at about 0.8 v, the power factor electric water pump of three-phase asynchronous motor diesel engine, "kw number plus one times the rated current of the motor. (2) empirical formula: the motor rated current (A) = motor capacity (kW) x 2 the simplified formula and empirical diesel generator set formula is the use of single generator set phase induction motor the result is consistent, the rated current and calculate the motor nameplate was very close to the actual current values, conforms to the practical requirements, A Y132S1-2, 10 kW motor, for www.facebook.com/guohong.trading diesel engine ac motor example, using the simplified formula or empirical formulas calculate its rated current: 10 x 2 = 20 A.
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
L, (1), using thin wall copper tube instead of thick wall steel pipe. (2), the embedded depth electric motors and position deviation is bigger. (3), cooked water pump in welding corner, on the wall of pipe and horizontal into household electric welding pipe network to link into 90 ° Angle. (4), into the pipe and the basement exterior wall waterproof processing is not good. 2, root cause generator analysis (l), material buyer purchases are not familiar with ac motor national norms, standards, some construction unit obfuscation to reduce costs; Construction manager is not strict or intentional misconduct of the contractor couldn't disagree, do not enforce norms and standards; Supervision of personnel management of the material approach a hole. (2), insufficient coordination with civil engineering and other professional team. (3), no pipe auto spare parts bending machine, or do not use pipe bender, not strong sense of responsibility, convenience to use welding to burn. Tube (4), embedded into the homes of workers don't understand waterproof technology, and is not waterproof, please professional help.
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 (l), and must use thick wall copper tube into the household embedded pipe or conform to the requirements of the PVC tube (general wall auto spare parts thickness PVC Φ l 14 more than 4.5 mm, Φ 56 meters to 3 mm). (2), strengthening coordination and cooperation with civil engineering and other related professional, clear outdoor floor level, to ensure that the embedded depth of not less than 0.7 meters. (3), strengthen the contracting team leadership and material buyer relevant laws and regulations of education, supervising personnel should strictly carry out material approach to test the rules, magnetic generator plug hole. (4), embedded steel pipe on the wall of elbow must use pipe bender www.facebook.com/guohong.trading bending, bending are not allowed to welding and welding. Steel pipe after bending, there should be no cracks and significant dent phenomenon, its bending flat program should not be greater than 10% of the pipe diameter, bending radius should not less than wear into the minimum allowable diesel engine bending radius of the cable. (5), good waterproof processing, please professional on-site guidance or by waterproof professional leagues do waterproof processing.
1. The number of reflect the synchronous speed of the motor, 2 pole synchronous speed was 3000 r/min, 4 pole synchronous speed was 1500 r/min, 6 pole synchronous speed was 1000 r/min, eight pole synchronous speed was 750 r/min. Winding motor vehicle spare parts the way go to form a loop, namely pole logarithm, come in pairs, extremely is the meaning of magnetic pole, the winding magnetic field when an electric current, there will be a pole. . Each group of three-phase ac motor coil produces N and S poles, each motor each phase contains the number of poles is very few. Due to the magnetic poles are paired, so the motor with 2, 4, 6, 8... Extremely. 2. If the frequency of the three-phase ac 50 Hz, the synthesis of the synchronous speed of the magnetic field of 50 r/s, which is 3000 r/min. If the rotating magnetic field of the motor is not just a pair of magnetic poles, further analysis can also get synchronous speed n. and the relationship between the logarithmic p magnetic poles: n = 60 f/p.f for frequency, the unit is Hz. N units for r/min. The ns and pick up the frequency of the alternating current (ac) (f), electrical magnetic pole has strict relationship between log (p). The ns = f/p in China, the power frequency 50 Hz, so the diode motor wholesalemotor.blogspot.com synchronous speed is 3000 RPM, quadrupole motor synchronous speed is 1500 RPM, and so on. The speed of the rotor asynchronous motor is always less than or more than its. The speed of the rotating magnetic field, asynchronous in the name of the resulting.
The difference between the rotational speed and rotating magnetic field of asynchronous motor rotor (called slip) usually within 10%. Thus, the ac motor (either synchronous or asynchronous). Speed is the restriction of the power frequency. Ac motor speed control, electrical motor therefore, is hard, the best way is to change the power frequency, whereas in the past to change the power frequency is more complex. So before the 70 s, in the required speed. Occasions, multi-purpose dc motor. With the development of power electronic technology, the ac motor frequency control of motor magnetic generator speed technology has started to get practical. 3. The synchronous motor speed = polar logarithmic x frequency (power frequency 50 hz) in our country, the asynchronous motor speed = extremely logarithmic x frequency - logarithmic * slip frequency. In addition, the same power of motor, the greater the speed, the smaller the output torque. 4) of synchronous motor pole: the large capacity of synchronous motor are turning pole type, namely the rotor magnetic pole, is produced by passing a dc excitation winding, and synchronous machine very logarithm is the logarithmic rotor magnetic pole. Eight pole motor rotor is eight pole, 2 p = 8, namely the motor with 4 poles. Steam turbine generator is non-salient pole type motor, more commonly a logarithmic rarely, generally for 1, 2, and n = 60 f/p, so his speed is high, up to 3000 RPM (frequency), and the number of hydro-generator. Quite a lot, for the salient pole rotor structure, the process is more complex, because the number of his lot, so he has a very low speed, perhaps only a few turns per second
