Motor driving device including single inverter for single-phase motor and three-phase motor and appliance having the same
US11522475B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2021 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Jul 2, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2209/01
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor driving device controls a three-phase motor and a single-phase motor to operate in parallel. The motor driving device includes a dc terminal in which an upper and a lower DC-link capacitor are located. The motor driving device also includes a neutral terminal disposed between the upper and lower DC-link capacitors. The motor driving device includes an inverter that includes three pairs of upper switching elements and lower switching elements. Two pairs of upper switching elements and lower switching elements among three pairs are connected to an a-phase terminal and a b-phase terminal of the three-phase motor, respectively. The other pair of upper switching elements and lower switching elements among three pairs is connected to a first terminal of the single-phase motor. The neutral terminal is connected to a second terminal of the single-phase motor. A c-phase terminal of the three-phase motor is connected to the single-phase motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.