System and method for controlling motor speed using a biased pulse width modulated drive signal
US7193377B2 · kind B2 · utility
8Cited by
9References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 4, 2004 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Jan 30, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/29
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor drive circuit includes a switching circuit having an input node that receives a drive signal and a control node that receives a control signal. The switching circuit couples the input node to an output node responsive to the control signal. A bias element receives an input signal and is coupled to the output node of the switching circuit. The bias element automatically develops a bias voltage on the output responsive to the input signal. The drive circuit may be used, for example, in a motor control system to control the speed of a DC motor, such as in a power supply for a computer system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.