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Zero current switching between winding sets in a permanent magnet alternator having a split winding stator

  • US 5,510,696 A
  • Filed: 11/03/1994
  • Issued: 04/23/1996
  • Est. Priority Date: 11/03/1994
  • Status: Expired due to Fees
First Claim
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1. In a vehicle electrical system having a permanent magnet alternating current generator, said generator having a rotor and a polyphase output winding comprised of first and second winding sets, said first winding set having a larger number of turns per phase than said second winding set, each of said winding sets having AC output voltage terminals, an apparatus for selectively rectifying the AC output voltage from one of said first and second winding sets comprising:

  • a full-wave rectifier bridge having a DC output voltage and a plurality of AC input terminals corresponding to the number of phases of said generator;

    steering means operative in a first mode to couple said plurality of AC input terminals to the first winding set and decouple said plurality of AC input terminals from the second winding set and a second mode to couple said plurality of AC input terminals to the second winding set and decouple said plurality of AC input terminals from the first winding set;

    selection means for selecting said first mode when said rotor speed is below a predetermined threshold speed and said second mode when said rotor speed is above said threshold speed.

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