Drive apparatus of synchronous motor and method for driving synchronous motor
US12401301B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2021 |
| Grant date | Aug 26, 2025 |
| Priority date | — |
| Expiry date | Jan 7, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2207/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A drive apparatus of a synchronous motor includes a current detecting unit that detects a phase current flowing to the synchronous motor and a magnetic pole position estimating unit that estimates a magnetic pole position of a rotor of the synchronous motor. The magnetic pole position estimating unit includes a first peak-to-peak detector that detects a first peak-to-peak value representing a difference between a maximum value and a minimum value of the phase current, a quadrature component detector that detects a quadrature component of the phase current, and a second peak-to-peak detector that detects a second peak-to-peak value representing a difference between a maximum value and a minimum value of the quadrature component. The magnetic pole position estimating unit calculates a first magnetic pole position and estimates an initial magnetic pole position of the rotor, based on the first magnetic pole position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.