Design criteria for brushless dc motors for high-speed sensorless operation

摘要

A design criteria for brushless dc motors for high-speed sensorless operation is described. It is shown that motors can be designed such that the free-wheeling diodes in the power electronic drive have a low conduction angle, while exhibiting high efficiency. Thus, established sensorless commutation strategies based on the detection of the zero-crossing of the back-emf waveform, can be employed.