Operation control method resonance frequency of reciprocating compressor
US6746211B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2002 |
| Grant date | Jun 8, 2004 |
| Priority date | — |
| Expiry date | Jul 24, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2203/0404
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An operation control method of a reciprocating compressor is disclosed in which, in case that a motor is overloaded, an operation frequency is increased to render magnetic fluxes of a magnet and an input current are mutually offset, so that a reciprocating compressor can be stably driven even in case of the overload. For this purpose, while the reciprocating compressor using an inverter is operated at a rated frequency, a current load of the motor is measured and the measured load is compared with a pre-set reference load. Upon comparison, if the measured load is greater than the reference load, it is determined as an overload and the operation frequency is increased by as much as a certain value higher than an oscillation frequency, for performing an overload operation. In order to compensate a stroke reduction generated as the operaiton frequency is increased by as much the certain value, the voltage applied to the motor is increased by as much as a certain level according to the increased operation frequency, thereby performing an overload operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.