Title:
THREE-PHASE BRUSHLESS DC MOTOR
Document Type and Number:
Japanese Patent JP2021078162
Kind Code:
A
Abstract:
To provide a three-phase brushless DC motor which can be rotationally driven with high performance in both the rotations in a prescribed direction of a rotor magnet and in its inverse direction.SOLUTION: A three-phase brushless DC motor comprises a stator core, a rotor magnet installed rotatably to a stator, and magnetic pole detecting means 24 for detecting a magnetic pole of the rotor magnet. The magnetic pole detecting means has a first magnetic pole sensor set 20 for detecting the magnetic pole of the rotor magnet at normal rotation, and a second magnetic pole sensor set 22 for detecting the magnetic pole of the rotor magnet at reverse rotation. At the normal rotation, a first switching control signal is generated based on a detection signal from the first magnetic pole sensor set, and a driving current supplied to drive coils 8a to 8i is controlled based on the first switching control signal. Also at the reverse rotation, a second switching control signal is generated based on a detection signal from the second magnetic pole sensor set, and a driving current supplied to the drive coils is controlled based on the second switching control signal.SELECTED DRAWING: Figure 3
Inventors:
FUKAYA KOICHI
YAMAUCHI KAZUHIKO
YAMAUCHI KAZUHIKO
Application Number:
JP2019199963A
Publication Date:
May 20, 2021
Filing Date:
November 01, 2019
Export Citation:
Assignee:
ARUMO TECHNOS KK
International Classes:
H02K29/08; H02K11/33; H02K21/14; H02P6/16; H02P6/22
Domestic Patent References:
| JPH05176514A | 1993-07-13 |
Attorney, Agent or Firm:
Tadaaki Kishimoto
Hiromi Matsushita
Hiromi Matsushita