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When controlling ac and dc motors, power factor is an important drawback to consider. Why is this?
if it helps the subject is motor control principles
3 Answers
- 異域秦後人Lv 77 years ago
Some thing was wrong in your question.....
DC motor uses DC power that has nothing to do with power factor !
To compensate power factor is done into the AC motor itself before the speed control unit.
Compensate power factor near to 1 can reduce the waste of electricity .
- 7 years ago
The lower the power factor, the greater the current required to deliver the same power, and this requires heavier wiring. This is because the current and voltage are more out of phase. Power factor equals delivered power divided by apparent power, where apparent power equals voltage times current and delivered power equals voltage times current times the cosine of the phase angle between them. Obviously, this will not be a problem with DC motors, since there is no phase difference between current and voltage.
