Variable motor speed control for automatic washer

Details Variable motor speed control for automatic washer Variable motor speed control for automatic washer

1989-06-12

1990-08-21

Smith, David

Electricity: motive power systems

Induction motor systems

Reversing

318257, 68 12R, H02P 320

Patent

active

049509691

ABSTRACT:
A variable speed control is provided for controlling a reversing permanent split capacitor motor in an automatic washer. The operation of the motor is controlled such that the motor will accelerate for a first predetermined time period and then coast with no power applied for a second predetermined time period. This generalized operation of the motor occurs in the spin cycle. In the agitate cycle, a logic decoding circuit uses a tach pulse signal indicative of the speed of the motor to provide a time for the motor to be on, and utilizes an AC line current zero crossing signal from a zero crossing detector to establish a time during which the motor is off, the motor on plus off time establishing a stroke rate for the agitate cycle.

REFERENCES:
patent: 2195287 (1940-03-01), Schaefer
patent: 2242343 (1941-05-01), Buchanan
patent: 2279210 (1942-04-01), Spear
patent: 3216226 (1965-11-01), Alger et al.
patent: 3315500 (1967-04-01), Brundage et al.
patent: 3369381 (1968-02-01), Crane et al.
patent: 3387205 (1968-06-01), Tesdall
patent: 3549969 (1970-12-01), Yoshimura
patent: 3622852 (1971-11-01), Myers
patent: 3688170 (1972-08-01), Karklys et al.
patent: 3891909 (1975-06-01), Newson
patent: 4070605 (1978-01-01), Hoeppner
patent: 4215303 (1980-07-01), Brimer
patent: 4232536 (1980-11-01), Koseki et al.
patent: 4235085 (1980-11-01), Torita
patent: 4288828 (1981-09-01), Kuntner et al.
patent: 4289995 (1981-09-01), Sorber et al.
patent: 4313075 (1982-01-01), Stewart et al.
patent: 4317343 (1982-03-01), Gerry
patent: 4372134 (1983-02-01), Matsuo
patent: 4411664 (1983-10-01), Rickard et al.
patent: 4461985 (1984-07-01), Stitt
patent: 4471274 (1984-09-01), Ross et al.
patent: 4473001 (1984-09-01), Rieger
patent: 4542633 (1985-09-01), Hirooka et al.

Affiliated with

Also associated with

Rating

Variable motor speed control for automatic washer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable motor speed control for automatic washer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable motor speed control for automatic washer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1680718