×

Electronically commutated motor for driving a compressor

  • US 5,423,192 A
  • Filed: 08/18/1993
  • Issued: 06/13/1995
  • Est. Priority Date: 08/18/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. A system for driving a compressor of a refrigeration system at one or more preset speeds, said system comprising:

  • a motor having a stationary assembly and a rotatable assembly in magnetic coupling relation thereto, said stationary assembly including windings adapted to be commutated in at least one preselected sequence, said rotatable assembly being in driving relation to the compressor;

    means for generating a speed select signal representative of a selected one of the preset speeds, said motor driving the compressor at a desired speed corresponding to the speed select signal;

    an application specific integrated circuit (ASIC) connected between the speed select signal generating means and the motor, said ASIC including a circuit for generating a position signal representative of a position of the rotatable assembly, said ASIC further including means, receiving and responsive to the speed select signal and the position signal, for generating a commutation signal for controlling commutation of the motor thereby to operate the motor at the selected preset speed as represented by the speed select signal; and

    power switching devices responsive to the commutation signal for selectively connecting a power supply to the windings in the preselected sequence to produce an electromagnetic field for rotating the rotatable assembly.

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