Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1985-06-24
1986-12-02
Dobeck, B.
Electricity: motive power systems
Switched reluctance motor commutation control
318138, H02K 2900
Patent
active
046267514
ABSTRACT:
When the motor's permanent-magnet rotor is in a first range of angular positions a stator-winding phase is energized to have a first magnetic polarity, and to have an opposite second polarity when the rotor is in a second range of angular positions. The rotor angular position is sensed by a magnetic-field-sensitive semiconductor element, especially a Hall generator, responsive to the field from the permanent-magnet rotor. When the rotor is in a range of angular positions between such first and second ranges, all power transistors are rendered non-conductive, by control signals derived from the magnetic-field-sensitive semiconductor element by intermediate circuitry, to render the stator-winding phase currentless during the time interval within which commutation is to occur. The intermediate circuitry introduces threshold value(s), to determine from the rotor-position signal when the rotor is in such intermediate range, and may furthermore amplify the rotor-position signals and/or apply temperature compensation to highly-temperature-dependent rotor-position signals. The motor is a one-phase collectorless d.c. motor. The intermediate circuitry can also be used to furnish such temperature conpensation in the case of plural-phase collectorless d.c. motors.
REFERENCES:
patent: 3383574 (1968-05-01), Manteuffel
patent: 3719870 (1973-03-01), Bregeault
patent: 3873897 (1975-03-01), Muller
patent: 3898544 (1975-08-01), Tanikoshi
patent: 4134030 (1979-01-01), Pace
patent: 4449081 (1984-05-01), Doemen
Motorola, "Silicon Zener Diode and Rectifier Handbook" 1964, pp. 23-26.
Dobeck B.
Koss, Jr. Theodore J.
Papst-Motoren GmbH & Co KG
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