Electronic control device for an electronically commutative moto

Details Electronic control device for an electronically commutative moto Electronic control device for an electronically commutative moto

1994-03-30

1995-10-10

Wysocki, Jonathan

Electricity: motive power systems

Limitation of motor load, current, torque or force

318254, H02P 700

Patent

active

054573661

ABSTRACT:
An electronic control device for an electric motor (10), particularly an electrically commutated (EC) motor, whose motor windings (11 to 13), in order to control the winding current, are connected in series with respective control transistors (15 to 17) whose control connections are charged by control pulses which are triggered by commutation signals and which have a predeterminable pulse-duty factor (block control). At the same time, the control device varies the amplitudes of the control pulses to control and permit the operation of the control transistors (15 to 17) in their amplifying range (linear control). Block control dominates in the upper rpm range in order to improve efficiency with respect to pure linear control, and linear control dominates in the lower rpm range in order to prevent severe current peaks, and hence an increased noise development that would occur with pure block control.

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