Specifications
1.iron or steel
2.sand casting
3.ISO,UL,FM,LPCB,VDS,TS16949
4.timely delivery
5.reasonable price
1, rotor resistance. Wound rotor asynchronous motor rotor string into the appropriate three-phase symmetrical resistance. Can not only improve the starting torque, but also reduce the starting current. Such as the diesel engine required starting torque is equal to the maximum torque, Sm generator price = 1 for reducing starting time, Water pump increase the speed of the whole process of starting torque, smooth starting process, removing the concatenated starting resistance gradually. Advantages: reduce the starting current and starting torque maintain bigger scope, need to reload start-up equipment such as electric water pump bridge crane, hoist, etc. Weakness: the boot device is more, part of the energy consumption in the start resistance and start series 3 phase induction motor is less. 2, frequency-sensitive rheostat. Frequency-sensitive auto spare parts rheostat is a new non-contact element has a unique structure.
3 Phase induction Electrical Motor MS Series for winding machine
Specifications
ambient temperature:-15 -40
above sea level : not exceed 1000m
rated voltage:+-5%
The three-phase reactor to be like and its external structure, that is, there are three core column and of three winding, three windings into a star, and through the slip ring and brush with three-phase wound rotor motor rotor winding. Initially started when the wound rotor motor, www.dongfeng-motor.com motor speed is very low, so the rotor frequency f2 is a large (close to f1), in the core loss is very big, the equivalent resistance Rm is very big, therefore, limit the single phase induction motor starting current, increase the starting torque. Current frequency decrease with the increase of n, rotor (f2 = s f1) Rm decreases, and keep the starting current and torque must be numerical. Frequency-sensitive rheostat is actually using the rotor frequency f2 smooth change for the purpose of the smooth rotor loop total auto spare parts resistance decrease. After the start, the rotor winding short sub, the frequency- sensitive rheostat removed from the circuit. Because of frequency-sensitive rheostat equivalent resistance Rm and reactance Xm varies with the frequency of rotor current, responsive, so called frequency-sensitive rheostat. Advantage: the structure is simple, low cost, easy maintenance, smooth start. Weakness: the inductance exists, cos Φ low starting torque is not large, suitable for wound rotor motor start light load.
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