Sensorless field-oriented control (FOC) without current sampling for motors
US8928265B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2012 |
| Grant date | Jan 6, 2015 |
| Priority date | — |
| Expiry date | Mar 14, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus includes a sensorless field-oriented control (FOC) motor controller. The motor controller includes a pulse width modulation (PWM) controller configured to generate PWM signals and to provide the PWM signals to an inverter. The motor controller also includes an angle sampler configured to receive a commanded voltage angle signal and to provide the commanded voltage angle signal as an output signal in response to a triggering event. The triggering event is based on a voltage or a current associated with an input or an output of the inverter. The motor controller further includes a first combiner configured to combine (i) a feed-forward voltage angle signal and (ii) a second signal based on the output signal. The first combiner is configured to generate the commanded voltage angle signal. In addition, the motor controller includes a second combiner configured to combine a feed-forward voltage amplitude signal and the second signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.