Drive unit for compressor and refrigerator
US7392158B2 · kind B2 · utility
24Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2003 |
| Grant date | Jun 24, 2008 |
| Priority date | — |
| Expiry date | Dec 14, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An instantaneous current and instantaneous voltage of a three-phase coil of a brushless DC motor are detected, and the internal condition of a compressor is predicted from these detection values. The prediction about the internal condition of the compressor is made in such a way that motor driving torque which is a parameter of a motor model is identified and poor lubrication, liquid compression or the like is predicted from this identified motor driving torque. This enables it to make, in real time, a failure forecast, failure diagnosis etc. on the compressor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.