Electricity: motive power systems – Switched reluctance motor commutation control
Patent
1989-01-27
1990-08-14
Ro, Bentsu
Electricity: motive power systems
Switched reluctance motor commutation control
310 63, 4174237, 318696, H02K 904, F04B 3504
Patent
active
049490222
ABSTRACT:
A direct current electrical fan motor for use in small electrical equipment such as down sized personal computers and the like incorporates a fan housing forming a circular fan opening and having a bearing support located centrally of the fan housing. A plurality of electrical coils are supported by the housing in spaced relation about the inner periphery of the fan housing. The fan housing also forms a circular internal channel at the inner peripheral portion thereof. A fan is provided centrally of the housing and is rotatably supported by the bearing. The fan incorporates a plurality of fan blades radiating from a central rotor and having a circular structural member supporting the tips of the blades against vibration. A plurality of permanent magnets are supported by the circular structural member and are movable within the internal channel of the housing upon rotation of the fan, thus moving in close proximity to the spaced coils of the housing during rotation of the fan. A solid state circuit is provided for commutation of the permanent magnets of the fan rotor. Indexing for the motor control circuit may be provided by an LED circuit including an LED, a light sensor and a reflector fixed to a portion of the rotating fan element.
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Jackson James L.
Ro Bentsu
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