System for reducing torque ripple in an electric motor
US9236820B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 11, 2013 |
| Grant date | Jan 12, 2016 |
| Priority date | — |
| Expiry date | Aug 26, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/098
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor control system is provided. The motor control system includes a motor, a position sensor, a current sensor, and a control module. The motor has a rotor and a stator. The motor generates an output torque based on a phase current applied to the motor. The output torque generated by the motor creates a torque ripple that is within a predefined range. The position sensor monitors the motor to determine a rotor position. The current sensor monitors the motor to determine the phase current. The control module is in communication with the motor, the position sensor, and the current sensor. The control module includes a lookup table that stores values of phase current commands. The control module determines a phase current command from the lookup table based on the rotor position and the phase current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.