Register to reply

Induction motor and sequence reactance

Share this thread:
Jun22-14, 10:06 AM
P: 12
Hello! This is my second post about sequence reactances. This time- its in induction motor.

To my understanding ( once again ) -

In any network (symmetrical or unsymmetrical) , there would be 3 components- positive sequence component, negative sequence component and zero sequence component.


In induction motors, what do the: running reactance, starter reactance and standstill reactance mean?


Do any one of them signify/mean the positive sequence reactance of a unsymmetrical fault system?
Phys.Org News Partner Engineering news on
A spray-on light show on four wheels: Darkside Scientific
Research project on accident-avoiding vehicle concluded
Smaller artificial magnetic conductors allow for more compact antenna hardware
Jun22-14, 10:07 AM
P: 12
BTW, a prompt reply is very much appreciated. Please and thank you!
Jun24-14, 08:40 AM
P: 60
According to IEC 60909-0 Ch. 3.8 Asynchronous motors 3.8.1 General:
The impedance ZM = R M + jXM of asynchronous motors in the positive- and negative-sequence systems can be determined by:
UrM is the rated voltage of the motor;
IrM is the rated current of the motor;
SrM is the rated apparent power of the motor (SrM = PrM/(effrM* COSfiTM);
PrM is the rated motor power [kW]
effrM is the rated motor efficiency
COSfiTM is the rated motor power factor
ILR/IrM is the ratio of the locked-rotor current to the rated current of the motor.

Register to reply

Related Discussions
Creating a PM Induction Generator from Induction Motor Electrical Engineering 0
Induction motor help.? Electrical Engineering 3
AC induction motor,i use a strong clamper to lock the motor shaft Electrical Engineering 14
Induction Coil powering a load (inductive reactance problem) Electrical Engineering 23
Induction Motor Electrical Engineering 1