Title: Converter device and control method and refrigerating circulation device
Application Number: 200610160466 Application Date: 2006.11.28
Publication Number: 1976202 Publication Date: 2007.06.06
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H02P6/14;H02P6/16;F25B1/00
Applicant(s) Name: Toshiba Carrier Corp. Address:
Inventor(s) Name: Akiyama Kazuhiko;Kanazawa Hidetoshi;Kambe Soyuki
Attorney & Agent: hujian xin
Abstract:
    The present invention provides a converter device and control method and refrigerating circulation device which can accurately identify the rotate speed of the direct current motor, thus can suitably drive the direct current motor, regardless of how many the number of poles of the direct current motor is. The number of poles of the DC motor M is judged based on charge change in one circle rotation of three phase DC motor M without electric brush, if the judgement result is four poles, objective rotate speed NS is directly used based on the rotate speed command to control the output of the switch circuit; if the judgement result is six poles, 3/2 value of the objective rotate speed NS is taken as the suitable objective rotate speed NS to control the output of the switch circuit.
Time: 10