Controlling/driving apparatus for an electrically-driven compressor in a car
US5519301A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1994 |
| Grant date | May 21, 1996 |
| Priority date | — |
| Expiry date | Aug 16, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/72
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A controlling/driving apparatus for an electrically-driven compressor of an air conditioner mounted in an automobile. The apparatus comprises a DC-AC converting invertor 4 for converting a DC voltage into a pseudo AC voltage (e.g. a pulse train of positive and negative pulses), a DC voltage detector 7, and a pulse width changing unit 8 for changing the width of each pulse of the pulse train in accordance with the DC voltage detected by the DC voltage detector. Thus, the apparatus enables safe and efficient operation of the compressor with improved electric insulation and durability when large fluctuations in the power source voltage of the compressor occur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.