Protection for permanent magnet motor control circuits
US7652858B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 2007 |
| Grant date | Jan 26, 2010 |
| Priority date | — |
| Expiry date | Feb 19, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus are provided for protecting a motor control circuit in a permanent magnet electric motor system. The permanent magnet electric motor system includes a permanent magnet electric motor having a predetermined number of windings corresponding to the phases of the permanent magnet electric motor and a direct current (DC) bus coupled to a power source for providing operational power for the electric motor system. A motor control circuit is connected to the DC bus for receiving the operational power therefrom and is connected to the windings of the permanent magnet electric motor for controlling the permanent magnet electric motor. A protection circuit is connected to the DC bus for receiving the voltage therefrom for operation of the protection circuit and for detecting predetermined motor control circuit fault conditions from voltage sensed on the DC bus and in response thereto providing protection for the motor control circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.