Document Type and Number:
Japanese Patent JP4927052
Kind Code:
B2
Abstract:
To provide a refrigeration device capable of improving identification accuracy of inductance and improving operation efficiency.
In an air conditioner 110 equipped with a permanent-magnet synchronous motor 111 for driving a compressor 101 of a refrigeration cycle and an inverter device 210 for variable-controlling rotation frequency of the motor 111 by vector control, a microcomputer 231 of the inverter device 210 fixes a first d-shaft current command value Id*to a predetermined set value while fixing a predetermined time and a speed command value ω*as an identification mode during vector control operation. An average value is calculated by integrating difference between a second d-shaft current command value Id**and the first current command value Id*in the identification mode, and based on this, a correction amount ΔL*of an inductance setting value L*is calculated. After that, the vector control operation is carried out by using the inductance setting value L*to which the correction amount ΔL*is added.
COPYRIGHT: (C)2010,JPO&INPIT
Inventors:
Yoshiaki Kurita
Tatsuo Ando
Kuniaki Takatsuka
Takashi Oishi
Rei Kasahara
Ken Kinoshita
Kentaro Miura
Application Number:
JP2008242412A
Publication Date:
May 09, 2012
Filing Date:
September 22, 2008
Assignee:
Hitachi Appliances, Inc.
International Classes:
F25B1/00; F24F11/02; F24F11/47; F24F11/61; F24F11/64; F24F11/65; F24F11/86; H02P21/00; H02P21/02; H02P21/14; H02P21/18; H02P21/22; H02P21/24; H02P23/02; H02P23/14; H02P23/16; H02P27/04; H02P27/06; H02P27/08; F24F110/12; F24F140/00; F24F140/10; F24F140/20
Domestic Patent References:
| JP200749843A | | | | |
| JP20047924A | | | | |
| JP20085592A | | | | |
| JP200694601A | | | | |
| JP2006340530A | | | | |
| JP200811631A | | | | |
Attorney, Agent or Firm:
Kasuga Toshiaki
