Rotary machine controller, refrigerant compressor, refrigeration cycle system, and air conditioner
US11594993B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2018 |
| Grant date | Feb 28, 2023 |
| Priority date | — |
| Expiry date | Apr 9, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2205/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A controller includes: a connection switch that switches a connection state of a winding of a synchronous motor during a rotating operation of the synchronous motor; a current detector that detects a rotary machine current flowing in the synchronous motor; a position/speed estimator that estimates a magnetic pole position and speed of a rotor; a voltage applicator that applies a voltage to the synchronous motor; and a control circuitry that generates a voltage command given to the voltage applicator on the basis of the magnetic pole position and the speed, and outputs a switching operation command for switching the connection state to the connection switch. The control circuitry generates the voltage command to bring the rotary machine current close to zero before the connection state of the winding is switched.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.