Rotary machine control device, refrigerant compression device, refrigeration cycle apparatus, and air conditioner
US11626825B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2019 |
| Grant date | Apr 11, 2023 |
| Priority date | — |
| Expiry date | Jul 25, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotary machine control device includes a voltage application unit that applies a voltage to a rotary machine with three phases, a current detection unit that outputs current information representing information on a current caused to flow to the rotary machine by application of the voltage, a control unit that outputs a voltage command to apply a voltage between each of pairs of the phases of the rotary machine, and an open phase determination unit that performs open phase determination to determine whether an open phase occurs in the rotary machine, by detecting the values of currents flowing between the respective pairs of the phases by monitoring the voltage command and the current information, and by comparing the sum of the values of the currents flowing between the respective pairs of the phases with a predetermined reference value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.