Motor driving control device and motor driving control method

Patent metadata

Field	Value
Publication number	US-10381964-B2
Application number	US-201815890622-A
Country	US
Kind code	B2
Filing date	Feb 7, 2018
Priority date	Feb 14, 2017
Publication date	Aug 13, 2019
Grant date	Aug 13, 2019

Abstract

There is provided a motor driving control device and a motor driving control method capable of quickly activating a motor. The motor driving control device comprises a motor driving unit, a control circuit unit and a position detector. The motor driving unit selectively energizes coils Lu, Lv, Lw of a plurality of phases of the motor. The control circuit unit outputs a driving control signal C1 to the motor driving unit to switch, in a predetermined order, an energization phase of the coils Lu, Lv, Lw of the plurality of phases to be energized by the motor driving unit. The position detector outputs a position signal corresponding to a position of a rotor of the motor. The control circuit unit adjusts the energization phase based on the position signal when the motor is activated, thereby matching variation timing of a phase of the position signal and the energization phase with each other, and outputs the driving control signal C1 according to a period of the position signal after the activation of the motor.

First claim

What is claimed is:

1. A motor driving control device comprising:
a motor driving unit for selectively energizing coils of a plurality of phases of a motor;
a control circuit unit for outputting a driving control signal to the motor driving unit to switch, in a predetermined order, an energization phase of the coils of the plurality of phases to be energized by the motor driving unit; and
a position detector for outputting a position signal corresponding to a position of a rotor of the motor, wherein
the control circuit unit adjusts the energization phase based on the position signal when the motor is activated, thereby matching variation timing of a phase of the position signal and the energization phase with each other, and outputs the driving control signal according to a period of the position signal after the activation of the motor.

2. The motor driving control device according to claim 1 , wherein when the motor is activated, the control circuit unit quickly switches the energization phase in the predetermined order to adjust the energization phase.

3. The motor driving control device according to claim 1 , wherein when the motor is activated, the control circuit unit starts a switching operation of the energization phase in a period longer than the period of the position signal, and then shortens the period of performing the switching operation of the energization phase every time a predetermined condition is satisfied.

4. The motor driving control device according to claim 3 , wherein when the motor is activated, the control circuit unit stops an operation for shortening the period of performing the switching operation of the energization phase when the variation timing of the phase of the position signal and the energization phase are matched with each other.

5. The motor driving control device according to claiml, wherein when the variation timing of the phase of the position signal and the energization phase are not matched with each other after the activation of the motor, the control circuit unit adjusts the energization phase based on the position signal to match the variation timing of the phase of the position signal and the energization phase with each other.

6. A method for controlling driving of a motor, wherein the motor comprises:
a motor driving unit for selectively energizing coils of a plurality of phases of a motor;
a control circuit unit for outputting a driving control signal to the motor driving unit to switch, in a predetermined order, an energization phase of the coils of the plurality of phases to be energized by the motor driving unit; and
a position detector for outputting a position signal corresponding to a position of a rotor of the motor, wherein the method comprises:
a first step of adjusting the energization phase based on the position signal to match variation timing of a phase of the position signal and the energization phase with each other when the motor is activated; and
a second step of outputting the driving control signal according to a period of the position signal after the activation of the motor in the first step.

Assignees

• Minebea Mitsumi Inc

Inventors

• Aoki Masato

Classifications

• H02P27/06

  using DC to AC converters or inverters (H02P27/05 takes precedence) · CPC title

• H02P23/28

  Controlling the motor by varying the switching frequency of switches connected to a DC supply and the motor phases · CPC title

• H02P6/20 Primary

  Arrangements for starting (H02P6/08 takes precedence) · CPC title

• H02P6/16

  Circuit arrangements for detecting position · CPC title

• H02P6/22 Primary

  in a selected direction of rotation · CPC title