induction motor braking torque
induction motor braking torque
(OP)
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 changes the direction
of the torque.
In reality, the regerating torque is always higher, by 10%
than the motoring torque, WHY?
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 changes the direction
of the torque.
In reality, the regerating torque is always higher, by 10%
than the motoring torque, WHY?





RE: induction motor braking torque
RE: induction motor braking torque
RE: induction motor braking torque
I'm betting he hit the nail on the head with the comment about losses, assuming that you are computing torque from electrical quantities and change in rotor kinetic energy, rather than measuring torque directly. 5% losses is not unreasonable.