Motor system with interrupted PWM oscillation

Electricity: motive power systems – Induction motor systems – Primary circuit control

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Details

318254, 318599, 363 41, 388811, H02P 05408

Patent

active

057931836

ABSTRACT:
A brushless DC motor system using PWM switching, in which the PWM switching is temporarily frozen whenever a zero crossing is expected in the back EMF. This avoids disruption of zero-crossing detection due to switching transients from the power transistor.

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