Method for controlling an electronically commutated DC motor

Details Method for controlling an electronically commutated DC motor Method for controlling an electronically commutated DC motor

2005-01-04

2005-01-04

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S268000, C318S724000

Reexamination Certificate

active

06838841

ABSTRACT:
A method of controlling an electronically commutated DC motor having a multiphase stator winding which has an even number m of winding phases which are each connected in series with a controllable semiconductor switch, parallel to one another, in which in a lower power output range of the DC motor the semiconductor switches are cycled using a pulse control factor which is predefinable as a function of the rpm within the consecutive periods when the individual winding phases are energized. To reduce the maximum power losses in the semiconductor switches, a setpoint pulse control factor required for a setpoint rpm is achieved within a selected setting range of the pulse control factor by alternatingly setting a comparatively greater pulse control factor and a comparatively lower pulse control factor, and the setting of the two pulse control factors is varied over time so that a voltage setting the setpoint rpm is set across the stator winding on the average over time.

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