Title:
MOTOR CONTROL APPARATUS
Document Type and Number:
Japanese Patent JP2016116409
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a motor control apparatus capable of continuously controlling a discharge amount of cooling water from a water pump.SOLUTION: A position detection circuit 116 converts induction voltage generated in a non-energized phase of a motor body 118 for driving a pump 130 into a pulse signal. A microcomputer 110 calculates a position of a rotor from a signal converted as the pulse signal and controls an inverter circuit 114 through a pre-driver 112 so as to intermittently perform reverse rotation and continuously perform reverse rotation, low-speed positive rotation and high-speed positive rotation of the motor body 118 in accordance with the position of the rotor. Further, the microcomputer 110 controls the inverter circuit 114 so that when performing low-speed positive rotation of the motor body 118, a coil of one phase out of coils of three phases of the motor body 118 is turned to a non-energized state in accordance with the calculated rotor position, and a current is supplied from one coil out of coils of two phases to the other coil and then a current is supplied from the other coil to the one coil.SELECTED DRAWING: Figure 2
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| JPS525411 | MINIATURE BRUSHLESS MOTOR |
| WO/2006/008927 | ROTARY TOOL DRIVEN BY BRUSHLESS MOTOR |
Inventors:
NATSUME YOHEI
HIRAI NORIYUKI
TANAKA RYOSUKE
MATSUMOTO MASAKAZU
HIRAI NORIYUKI
TANAKA RYOSUKE
MATSUMOTO MASAKAZU
Application Number:
JP2014255383A
Publication Date:
June 23, 2016
Filing Date:
December 17, 2014
Export Citation:
Assignee:
ASMO CO LTD
International Classes:
H02P6/22; F04D15/00
Domestic Patent References:
| JP2009189176A | 2009-08-20 | |||
| JP2013192428A | 2013-09-26 | |||
| JP2005220886A | 2005-08-18 | |||
| JP2001173586A | 2001-06-26 |
Attorney, Agent or Firm:
Atsushi Nakajima
Kato Kazunori
Hiroshi Fukuda
Kato Kazunori
Hiroshi Fukuda