Speed control for an electric motor
US7417389B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 26, 2006 |
| Grant date | Aug 26, 2008 |
| Priority date | — |
| Expiry date | Mar 29, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/2913
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system and method for controlling a rotational speed associated with a shaft or rotor of an electric motor comprises establishing a target rotational speed associated with a shaft or rotor of an electric motor. A sensor detects an actual rotational speed associated with the shaft or rotor of an electric motor. Speed error data is determined. The speed error defined as a difference between the target rotational speed and the actual rotational speed. A first duty cycle factor is determined based on the speed error data and a first gain constant. A second duty cycle factor is determined based on the speed error data and a second gain constant. Duty cycle input data is calculated for the electric motor based on a sum of the first duty cycle factor, the second duty cycle factor, and the target speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.