Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1990-05-31
1991-07-30
Ro, Bentsu
Electricity: motive power systems
Switched reluctance motor commutation control
318138, H02P 602, H02K 2912
Patent
active
050362640
ABSTRACT:
A sensorless-type brushless motor equipped with a rotor having a plurality of magnet poles and a stator having a plurality of multi-phase drive coils to generate a rotational torque with respect to the rotor. The motor is arranged to be controllable by a control circuit arrangement which includes a drive pulse generation section for generating drive pulses corresponding to the rotational speed of the rotor and a motor drive section for supplying drive signals in shifts to the coils in response to the drive pulses so as to rotationally drive the rotor. Also included is a timing signal generation section for producing timing signals indicative at least two timings corresponding to a flowing time period for which the drive signal is supplied to at least one of the coils, on the basis of the rotor speed. The timing signal generation section is coupled to a voltage measurement section which is in turn coupled to an input terminal of the coil for measuring voltages at the input terminal in response to the produced timing signals. A correction signal generation section produces a correction signal on the basis of the voltage values measured by the voltage measurement section. The correction signal is supplied to the drive pulse generation section so as to correct the timing of generation of the drive pulses on the basis of the correction signal.
REFERENCES:
patent: 4162435 (1979-07-01), Wright
patent: 4525657 (1985-06-01), Nakase et al.
patent: 4603283 (1986-07-01), Oltendorf
patent: 4631459 (1986-12-01), Fujioka et al.
patent: 4928043 (1990-05-01), Plunkett
patent: 4937508 (1990-06-01), Rozman
Ro Bentsu
Victor Company of Japan Ltd.
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