×

Combined motor drive and battery recharge system

  • US 5,341,075 A
  • Filed: 03/10/1993
  • Issued: 08/23/1994
  • Est. Priority Date: 03/10/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. An integrated motor drive and power source recharging system comprising:

  • a polyphase electric motor having a plurality of motor windings;

    a rechargeable DC power source having a positive terminal and a negative terminal;

    a plurality of bi-directional switching means for supplying electrical current to respective ones of the plurality of motor windings in a drive mode, each of the switching means having positive and negative terminals coupled in parallel to the positive and negative terminals of the DC power source, respectively, each of the switching means further having a center terminal coupled to a respective one of the motor windings in the drive mode;

    an AC port having first and second terminals for connection to a source of AC electrical power;

    first contactor means for selectively decoupling the center terminal of a first one of the plurality of switching means from its respective first motor winding in any mode other than the drive mode;

    second contactor means for selectively coupling the first terminal of the AC port to the center terminal of the first switching means and the second terminal of the AC port to the first motor winding in a recharge mode so as to incorporate the first motor winding as an inductive circuit element in a recharging circuit;

    switch control means for operating the plurality of switching means as a polyphase inverter in the drive mode and for operating at least the first switching means as a switching regulator in the recharge mode.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×