Title:
PREHEATING CONTROL DEVICE FOR COMPRESSOR
Document Type and Number:
Japanese Patent JP2011127553
Kind Code:
A
Abstract:
To solve the problem that when a compressor is energized and preheated, if current is increased, switching energization phase generates torque, vibrations and noises, and meanwhile, if the current is decreased, the lengthened preheating time delays start of operation of the compressor.
In the preheating control device for the compressor, a current control device creates a current command whose frequency is high and whose effective value is large while preheat is being controlled. Because the device prevents the vibrations or noises generated from the compressor and shortens the time for heating the compressor, the device achieves prompt start of the operation of the compressor.
Inventors:
ITO YOSHITERU
Application Number:
JP2009288587A
Publication Date:
June 30, 2011
Filing Date:
December 21, 2009
Export Citation:
Assignee:
PANASONIC CORP
International Classes:
F04B49/06; F04B39/06; F04C28/06; F24F11/02; F25B1/00
Attorney, Agent or Firm:
Hiroki Naito
Daisuke Nagano
Kentaro Fujii
Daisuke Nagano
Kentaro Fujii
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