Rotary speed control circuit for feeding a dc universal motor

Details Rotary speed control circuit for feeding a dc universal motor Rotary speed control circuit for feeding a dc universal motor

1997-09-22

2000-01-18

Nappi, Robert E.

Electricity: motive power systems

Alternating current commutating motors

Universal or a.c.-d.c. motors

363 37, H02K 2364

Patent

active

060160411

ABSTRACT:
A rotary speed control circuit for feeding a dc universal motor for driving a washing machine. A rectifier and a smoothing capacitor derive the operating voltage of the motor from the mains ac voltage and provided for control of the rotary speed is a regulating device (R) which controls a power stage for the motor, the power stage including a power switch (TR1) and a commutation diode (D1) in the topology of a low-setting device. The power stage feeding the motor includes a high-setting inductor (L) and can be switched over from the topology of a low-setting device to the topology of a high-setting device.

REFERENCES:
patent: 4615000 (1986-09-01), Fujii et al.
patent: 4838050 (1989-06-01), Azuma
patent: 5241257 (1993-08-01), Nordby et al.

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