Apparatus and related method to compensate for torque ripple in a permanent magnet electric motor
US5223775A · kind A · utility
71Cited by
9References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 28, 1991 |
| Grant date | Jun 29, 1993 |
| Priority date | — |
| Expiry date | Oct 28, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/902
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An input control current command signal is modified in accordance with a number of compensation factors stored in a memory and corresponding to each of a number of angular shaft positions to provide a control signal to cause an inverter to drive each of the number of phases of a permanent magnet axial-field motor to cause the motor to produce a ripple-free torque output. The compensation values stored in the memory are identified and determined in accordance with the source of the torque ripple such as vibration, load operation, noise and variations within the motor construction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.