Power conversion device and compressor driving device
US10177703B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2014 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | Sep 17, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A leak-current detecting unit detects a zero-phase current flowing from an electric-motor driving device, which drives an electric motor with electric power from an alternating-current power supply, or the electric motor to a ground, a leak-current control unit that, on the basis of the zero-phase current detected by the leak-current detecting unit, generates a control signal having cyclicity synchronized with the alternating-current power supply, and an anti-phase generating unit that generates an anti-phase current that is in anti-phase to the zero-phase current on the basis of the control signal from the leak-current control unit, and outputs the anti-phase current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.