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why a resistor is added in parallel with a transistor base-emitter. e.g., a transistor is driven through a 10k at its base and between base and emitter another 10k is connected in parallel?

CJCPE: The whole question is about why the loss (motor + inverter)is different for motoring and regen. For the same commanded torque, why measured torque using torque transducer, not estimated, are different for motoring and regen with open loop control?

It was realized that both 30kW induction and 100kW PM motor have different power loss during motoring and regen. It seems that regen has about 10% higher loss. The measurement was carried out such that DC bus voltage and current were controlled at fixed value, for motoring the dc current is out...

Please advise on the difference between op-amps and voltage comparitors. Can a comparitor be used as op amp or vise verse?

In general,what is the range of winding inductance of cage type induction motors with power of 100kW to 150kW for traction application?

In general,what is the winding inductance of cage type induction motors in the range of 100kW to 150kW for traction application?

The information provided is good, but the question is not answered - how the coupled output inductors improve the output cross regulation,,, With separate inductors, the load of one output increases will result in the voltage increase of other output. With coupled inductors, the voltage...

a two-transistor forward converter has two outputs - 15V and 24V. The two outputs have coupled output inductors. Please explain how the coupled output inductors improve the output cross regulation, reference preferred.

An induction motor is controlled with vector-control algorithm. Keeping Id constant, if the polarity of Iq is changed from '+' to '-', the motor torque should change from motoring to regenerating. Theoretically, if /Iq/ is the same, the torque, /T/, should be the same. The polarity of Iq only...