Sensed motor winding current adapting blanking period between max/min values
US9397597B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2014 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Jun 7, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Stepper motor winding current regulation methods and apparatus adapt a maximum blanking period to generate an adapted blanking period that is proportional to a currently-selected current regulation set-point. Sensed winding current feedback is ignored at a current regulation controller during the adapted blanking period or during a minimum blanking period, whichever longer, to avoid attempting to track noise imposed upon a sensed winding current feedback signal at an initiation of rapid current changes di/dt. Doing so may decrease ripple in the motor winding current waveform and reduce zero-crossing distortion by decreasing overshoot of the current regulation set-point by the sensed winding current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.