Circuit configuration and method for controlling an electric motor, in particular of a washing machine
US7239099B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 4, 2005 |
| Grant date | Jul 3, 2007 |
| Priority date | — |
| Expiry date | Nov 4, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/0241
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit configuration for driving an electric motor, in particular of a washing machine, includes power switches connected to connection terminals of the electric motor and to a voltage intermediate circuit. A driver circuit is connected to the voltage intermediate circuit and to the power switches. A control unit, in particular a micro controller, is connected to the driver circuit. The control unit generates control signals for controlling at least one rotation speed of the electric motor. The driver circuit generates short-circuit control signals for driving the power switches, which bring about a short circuit of the connection terminals connected to the power switches, independently of the control signals from the control unit. The driver circuit generates the short-circuit control signals as a function of a detection of an overvoltage of the voltage intermediate circuit over a desired voltage range. A method for controlling an electric motor is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.