Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1985-09-27
1987-02-03
Shoop, Jr., William M.
Electricity: motive power systems
Switched reluctance motor commutation control
318138, 318439, H02P 602
Patent
active
046410660
ABSTRACT:
A control apparatus detects a suitable starting point during rotational oscillation of a rotor at the start of a brushless motor by combining the polarity of a counter electromotive force generated in an armature coil of an armature winding of the brushless motor for a nonexcited phase due to the rotational oscillation of the rotor (when armature coils for particular phases are excited at the start of the brushless motor) with the pulse edge of an excitation switchover signal obtained from the potential of a neutral point of the armature winding having the armature coils connected in star-connection and that of a neutral point of a detecting resistance circuit having resistors connected in star-connection. Each of the resistors of the resistance circuit is arranged in parallel with a corresponding one of the armature coils the armature winding. By driving the brushless motor from the detected suitable starting point, it is possible to effect smooth and quick control of the starting operation of the brushless motor.
REFERENCES:
patent: 3264539 (1966-08-01), Sander
patent: 3439243 (1969-04-01), Roth
Nagata Masami
Setaka Yousuke
Yanase Sumio
Nippondenso Co. Ltd.
Ro Bentsu
Shoop Jr. William M.
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