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Motor Drive Architecture with Active Snubber

  • US 20090167225A1
  • Filed: 12/26/2007
  • Published: 07/02/2009
  • Est. Priority Date: 12/26/2007
  • Status: Active Grant
First Claim
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1. An active electrical protection apparatus for damping electrical transients in a control circuit of an electrical machine having phase windings driven using a commutation circuit and powered through a power supply connection, the apparatus comprising:

  • a power dissipating circuit arranged in parallel with said commutation circuit, and having a resistive element for dissipating power when electrical transients are damped and a first switch for switchably connecting said resistive element; and

    a controller for receiving a resonance signal representative of a resonance condition on said power supply connection, and for commanding said first switch at least as a function of said resonance signal.

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