Brushless D.C. motor having abnormal driving current cut-off cir

Details Brushless D.C. motor having abnormal driving current cut-off cir Brushless D.C. motor having abnormal driving current cut-off cir

1986-08-08

1988-01-26

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

361 30, 361 33, H05H 7085

Patent

active

047220201

ABSTRACT:
The safety circuit of the present invention is connected to a drive control circuit for applying driving signals to a plurality of switching devices connected to respective stator coils of the brushless D.C. motor at a predetermined timing, and sequentially supplying a driving current to each phase of the stator cells. The safety circuit is adapted to simultaneously detect the driving signals and generate a cut-off signal for cutting off the driving current supplied to each of the stator coils in the event that the driving signals are simultaneously applied to the switching devices in controlling a driving operation of the brushless D.C. motor.

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