Title:
単一巻線逆EMF感知ブラシレスDCモータ
Document Type and Number:
Japanese Patent JP2007515919
Kind Code:
A
Abstract:
A method and controller for electronically commutating a permanent magnet brushless dc motor ( 21 ) under closed loop control where current is commutated ( 22 ) through successive combinations of two out of three stator windings to produce a rotating flux. Commutations are determined by each 60° angular position of the rotor by sensing the back EMF ( 24 ) induced in only one of the three stator windings whenever that winding has no applied current flowing in it to determine the 0° and 180° positions and extrapolating the 60°, 120°, 240° and 300° positions by dividing the time interval therebetween by a factor of 3.
More Like This:
Inventors:
Harwood Jonathan David
Application Number:
JP2006546882A
Publication Date:
June 14, 2007
Filing Date:
December 21, 2004
Export Citation:
Assignee:
Fisher and Peker Appliances Limited
International Classes:
H02P6/18; H02K29/00; H02P6/08
Attorney, Agent or Firm:
Sadao Kumakura
Fumiaki Otsuka
Shishido Kaichi
Disciple Maru Ken
Ino Sato
Fumiaki Otsuka
Shishido Kaichi
Disciple Maru Ken
Ino Sato