Control device for electric compressor
US9991835B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 22, 2013 |
| Grant date | Jun 5, 2018 |
| Priority date | — |
| Expiry date | Oct 22, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P31/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control device for an electric compressor, capable of successfully controlling a drive motor of the compressor in response to the load fluctuation having complicated frequency components even when the motor is controlled in a sensorless manner, is provided. The control device for an electric compressor includes: a repetitive control portion 5 to which a rotation speed difference between a target rotation speed of a motor which drives the compressor and the estimated rotation speed is input to perform a repetitive operation using the rotation speed difference of one preceding cycle of the compressor, thereby reducing the rotation speed difference; a pressure detecting portion 1 for the compressor; and a reset signal generation portion 4 calculating a timing of one rotation of the compressor by counting the number of predetermined parts of load fluctuations of the compressor based on the pressure value of the compressor, thereby outputting a reset signal to the repetitive control portion according to the timing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.