Motor control device and air conditioner
US11012011B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2017 |
| Grant date | May 18, 2021 |
| Priority date | — |
| Expiry date | Apr 27, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P21/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor control device includes an inverter configured by a plurality of arms, a smoothing unit supplying a direct-current voltage to the inverter, a shunt resistor inserted between a lower-arm switching element for each phase of the inverter and a negative-electrode side of the smoothing unit, a master motor current sensor outputting a voltage according to a current flowing in a first motor connected in parallel to the inverter, and a computing unit generating driving signals for a plurality of switching elements based on an output of the master motor current sensor and an output corresponding to a voltage drop on the shunt resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.