Pulse width modulation (PWM) scheme for single shunt motor control
US10320323B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 2018 |
| Grant date | Jun 11, 2019 |
| Priority date | — |
| Expiry date | Mar 28, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/53876
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power module configured to supply a multi-phase current to a multi-phase load is provided. The power module includes an inverter circuit configured to generate a plurality of phase currents that contribute to the multi-phase current and an output voltage based on a plurality of pulse width modulation (PWM) signals; and a control unit configured to generate the plurality of PWM signals to control a plurality of phases based on space vector modulation and modulate the multi-phase current to generate a voltage space vector that is representative of the output voltage and which rotates through a plurality of PWM sectors of a space vector coordinate system. The control unit is configured to regulate a shifting pattern of the plurality of PWM signals during a zero vector switching period such that the shifting pattern is fixed for all of the plurality of PWM sectors as the voltage space vector rotates therethrough.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.