Rotary speed control circuit for feeding a dc universal motor
US6016041A · kind A · utility
6Cited by
3References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1997 |
| Grant date | Jan 18, 2000 |
| Priority date | — |
| Expiry date | Sep 22, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/155
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.