Title:
直流モータを制御するシステムおよび方法
Document Type and Number:
Japanese Patent JP5155322
Kind Code:
B2
Abstract:
Various systems and methods for controlling DC motors are disclosed herein. For example, one method provides for controlling a polyphase, brushless DC motor. The method includes providing a DC motor that has a plurality of phases. Such a DC motor operates by inducing a current in the plurality of phases in accordance with a plurality of commutation states. In the example, six commutation states are discussed, but fewer than or more than six commutation states may exist. The method further includes initializing a count, inducing a current in the plurality of phases in accordance with a first commutation state, and incrementing the count until the current achieves a threshold in the first commutation state. Then, a current is induced in the plurality of phases in accordance with a second commutation state, and the count is decremented until the current achieves the threshold in the second commutation state. The sign bit of the count is stored, and a desired initial commutation state is determined based at least in part on the sign bit of the count.
Inventors:
Dalberg, James A.
Wilson, Ross W.
Brenden, Jason Pea.
Wilson, Ross W.
Brenden, Jason Pea.
Application Number:
JP2009529165A
Publication Date:
March 06, 2013
Filing Date:
September 26, 2006
Export Citation:
Assignee:
Agia Systems Incorporated
International Classes:
H02P6/08; H02P7/06
Domestic Patent References:
| JP2006166574A | ||||
| JP2002325486A | ||||
| JP2005137141A |
Attorney, Agent or Firm:
Okabe
Masao Okabe
Nobuaki Kato
Shinichi Usui
Takao Ochi
Asahi Shinmitsu
Katsumi Miyama
Masao Okabe
Nobuaki Kato
Shinichi Usui
Takao Ochi
Asahi Shinmitsu
Katsumi Miyama