Power based pulse injection control for SR self sensing
US11545922B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jan 21, 2021 |
| Grant date | Jan 3, 2023 |
| Priority date | — |
| Expiry date | Mar 7, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2203/01
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Power based self-sensing of a rotor position of an SR motor at mid to high speeds and low torque is achieved by an SR motor control system by comparing the motor power to an injection maximum power. A position current pulse is injected to a stator pole in response to the motor power being less than the injection maximum power. An actual stator current created by the position current pulse is compared to an estimated stator current, and a stored estimated rotor position in a memory is updated to a new estimated rotor position if the actual stator current is not equal to the estimated stator current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.