Single coil, direct current permanent magnet brushless motor with voltage boost

  • US 6,940,238 B2
  • Filed: 11/18/2004
  • Issued: 09/06/2005
  • Est. Priority Date: 06/12/2003
  • Status: Active Grant
First Claim
Patent Images

1. A single coil, direct current permanent magnet brushless motor, comprising:

  • an internal rotor including at least four alternate poles;

    an external stator with a like number of salient poles, each including alternately wound coils coupled to form a single coil;

    a commutated H-bridge including a voltage boost circuit having capacitors providing a boosted voltage to alternately turn on high-side switches of the H-bridge, wherein the capacitors are charged by a low-side switching signal flowing through low-side switches; and

    a microcontroller to commutate the H-bridge.

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