| US 7,468,588 B2 | ||
| Apparatus and method for controlling operation of reciprocating compressor | ||
| Jae-Yoo Yoo, Gyeonggi-do (Korea, Republic of); Chel-Woong Lee, Seoul (Korea, Republic of); and Ji-Won Sung, Seoul (Korea, Republic of) | ||
| Assigned to LG Electronics Inc., Seoul (Korea, Republic of) | ||
| Filed on Nov. 17, 2004, as Appl. No. 10/989,387. | ||
| Claims priority of application No. 10-2003-0084638 (KR), filed on Nov. 26, 2003; and application No. 10-2003-0084641 (KR), filed on Nov. 26, 2003. | ||
| Prior Publication US 2005/0111987 A1, May 26, 2005 | ||
| Int. Cl. H02P 1/00 (2006.01); H02P 5/34 (2006.01) | ||
| U.S. Cl. 318—135 [318/114; 318/128; 318/632; 318/801; 417/44.11; 417/417] | 23 Claims |
| 1. An apparatus for controlling operation of a reciprocating compressor, comprising:
a mechanical resonance frequency calculating unit calculating a mechanical resonance frequency based on a current and a stroke
applied to a compressor;
an operating frequency command value determining unit determining an operating frequency command value within a predetermined
range of the calculated mechanical resonance frequency; and
a controller varying an operating frequency according to a comparison value between the determined operating frequency command
value and the present operating frequency, and driving the compressor based on the determined operating frequency command
value.
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