Laundry machine drive

• US 4,689,973 A
• Filed: 12/17/1986
• Issued: 09/01/1987
• Est. Priority Date: 09/21/1979
• Status: Expired

• Current Assignee: ITT Automotive Electrical Systems, Inc. (ITT, Inc.)
• Original Assignee: General Electric Company
• Inventors: Hershberger, Doran D.
• Primary Examiner(s): Coe, Philip R.
• Application Number:
  US06/942,896
• Time in Patent Office: 258 Days
• Field of Search: 310/156, 310/162-165, 310/181-184, 310/211, 310/212, 310/216, 68/23.7, 68/23 R, 29/418, 29/598
• US Class Current: 68/23.7
• CPC Class Codes: D06F 37/304 Arrangements or adaptations of electric motors
• CPC Class Codes: D06F 37/40 for driving the receptacle and an agitator or impeller, e.g. alternatively D06F37/304, D06F37/308 take precedence
• CPC Class Codes: H02K 1/2766 having a flux concentration effect

Abstract

A drive for a laundry machine having a means for agitating water and fabrics to launder the fabrics and for spinning the fabrics to effect centrifugal displacement of water from the fabrics. An electronically commutated motor energized from a DC power source for driving the agitating and spinning means includes a stator with a plurality of winding stages adapted to be electronically commutated in a plurality of preselected sequences, and a rotatable assembly is arranged in selective magnetic coupling relation with the winding stages so as to be rotatably driven thereby. The rotatable assembly is rotatably driven in one direction in response to the electronic commutation of at least some of the winding stages in one of the preselected sequences and also in the one direction and another direction opposite thereto in response to the electronic commutation of the winding stages in another of the preselected sequences. Means is provided for driving the agitating and spinning means from the rotatable assembly of the electronically commutated motor.

Claims

1. A drive for a laundry machine having a DC power source associated therewith and means for agitating water and fabrics to be laundered thereby to wash the fabrics and for thereafter spinning the fabrics to effect centrifugal displacement of water from the fabrics, the drive comprising:

an electronically commutated motor adapted to be energized from the DC power source for driving the agitating and spinning means, said electronically commutated motor comprising a stator, a multi-stage winding arrangement associated with the stator and having a plurality of winding stages adapted to be electronically commutated in a plurality of preselected sequences, and a rotatable assembly associated with said stator and arranged in selective magnetic coupling relation with said winding stages so as to be rotatably driven thereby, said rotatable assembly being rotatably driven in one direction in response to the electronic commutation of at least some of said winding stages in one of the preselected sequences and also being rotatably driven in the one direction and another direction opposite thereto in response to the electronic commutation of said winding stages in another of the preselected sequences; and

means for driving the agitating and spinning means from said rotatable assembly of said electronically commutated motor.

2. A drive as set forth in claim 1 further comprising means for securing said electromically commutated motor directly onto said driving means.

3. A drive as set forth in claim 1 further comprising means for selectively effecting a driven interconnection between said driving means and said rotatable assembly of said electronically commutated motor.

4. A drive as set forth in claim 1 wherein said driving means includes means adapted for conjoint rotation with said rotatable assembly of said electronically commutated motor.

5. A drive as set forth in claim 1 wherein said driving means is associated in mounting relation with said electronically commutated motor so as to be directly driven by said rotatable assembly thereof and includes means adapted for conjoint rotation with said rotatable assembly.

6. A drive as set forth in claim 5 further comprising means associated with at least one of said rotatable and said driving means and selectively operable for effecting a drivdn interconnection of said conjoint rotation means and said rotatable assembly.

7. A drive as set forth in claim 1 wherein said rotatable assembly includes a set of permanent magnet material elements arranged in the selective magnetic coupling relation with said winding stages.