Overload current control circuit for a DC motor
US7550940B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2007 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Jan 8, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/0811
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An overload current control circuit for a DC motor comprises: a DC motor, a DC power source, a power semiconductor assembly, and a sampling resistor that are connected in series. The overload current control circuit further comprises a voltage polarity switching circuit that is connected to a circuit between the sampling resistor and the overload protection and detection circuit to control the single polarity of the sampling voltage of the first and second terminals of the sampling resistor, so as to provide constant voltage potential to the overload protection and detection circuit, thus providing overload protection to the DC motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.