Motor driving apparatus and refrigeration cycle equipment
US11031896B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2017 |
| Grant date | Jun 8, 2021 |
| Priority date | — |
| Expiry date | Jul 31, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/024
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric quantity of a power supply of a connection switching device for switching the connection state of a motor, or at least one electric quantity which varies with the first-mentioned electric quantity is detected, the result of the detection is used to detect or predict a fall of a voltage of the switching power supply. Based on the result of the detection or prediction, an inverter is so controlled as to stop the motor before the voltage of the switching power supply falls below the minimum voltage required for the operation of the connection switching device. Breakdown of the connection switching device can be prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.