Title:
ROTATIONAL PHASE DETECTOR OF SYNCHRONOUS MOTOR
Document Type and Number:
Japanese Patent JP2015100141
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide the rotational phase detector of a synchronous motor capable of detecting the rotational phase of a synchronous motor reliably at high speed, by means of one position sensor.SOLUTION: Assuming the amplitude of cogging torque is Ta, the degree of which is N, the frictional torque acting when a synchronous motor 1 is stopped is Tf, and the angle obtained by the following equation is X, a position sensor 2 is installed so that the rotational position of a rotor 11, when a position sensor signal from the position sensor 2 is switched, falls within a range capable of installing the position sensor separated by the angle X or more from a stable stop position determined by the cogging torque. X={sin(Tf/Ta)}/N.
Inventors:
NISHIWAKI KAZUHIRO
NAKAMURA AKIRA
NAKAMURA AKIRA
Application Number:
JP2013237540A
Publication Date:
May 28, 2015
Filing Date:
November 18, 2013
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H02P6/06; H02P6/08; H02P6/16; H02P6/17
Domestic Patent References:
| JP2013146164A | 2013-07-25 | |||
| JP2012152078A | 2012-08-09 | |||
| JP2007082370A | 2007-03-29 |
Foreign References:
| WO1993010593A1 | 1993-05-27 |
Attorney, Agent or Firm:
Keigo Murakami
Masuo Oiwa
Kenji Yoshizawa
Takenaka Ikuo
Masuo Oiwa
Kenji Yoshizawa
Takenaka Ikuo
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