Motor control device, motor control method, and non-transitory computer readable medium encoded with computer program

Patent metadata

Field	Value
Publication number	US-10090789-B2
Application number	US-201715657516-A
Country	US
Kind code	B2
Filing date	Jul 24, 2017
Priority date	Jul 27, 2016
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

To provide a motor control device capable of causing a motor to rotate in any rotation direction, even when leaving the connection state of the motor of a machine tool as standard. A motor control device (10) includes: a coordinate converter (36) as a voltage command output unit that outputs voltage command data instructing a voltage to be applied to a motor (14) based on an external instruction; a voltage command data interchanging unit (38) that outputs by interchanging or not interchanging the voltage command data, based on a setting for interchanging of a phase rotation of the voltage command data; a PWM output unit (40) as an amplifier that drives the motor (14) based on the voltage command data outputted by the voltage command data interchanging unit (38); a current detection unit (42) that detects the electric current flowing through the motor (14) and outputs current feedback data; and a current feedback data interchanging unit (44) that outputs by interchanging or not interchanging the current feedback data based on a setting for interchanging.

First claim

What is claimed is:

1. A motor control device for controlling a motor of a machine tool, comprising:
a voltage command output unit that outputs voltage command data instructing a voltage to be applied to the motor, based on an external instruction;
a voltage command data interchanging unit that outputs the voltage command data by interchanging or without interchanging, based on a setting for interchanging of a phase rotation of the voltage command data;
an amplifier that drives the motor based on voltage command data outputted by the voltage command data interchanging unit;
a current detection unit that detects electric current flowing through the motor, and outputs current feedback data;
a current feedback data interchanging unit that outputs the current feedback data by interchanging or without interchanging, based on a setting for interchanging of phase rotation of the voltage command data,
wherein the voltage command data interchanging unit:
interchanges the voltage command data, in a case of the setting for interchanging of the phase rotation of the voltage command data and the connection phase rotation of the motor being consistent, based on a set phase rotation for interchanging of the phase rotation of the voltage command data, and
outputs the voltage command data as is without interchanging, in a case of the setting for interchanging of the phase rotation of the voltage command data and the connection phase rotation of the motor not being consistent, and
wherein the current feedback data interchanging unit:
interchanges the current feedback data, in a case of the setting for interchanging of the phase rotation of the voltage command data and the connection phase rotation of the motor being consistent, based on a set phase rotation for interchanging of the phase rotation of the voltage command data, and
outputs the current feedback data as is without interchanging, in a case of the setting for interchanging of the phase rotation of the voltage command data and the connection phase rotation of the motor not being consistent.

2. The motor control device according to claim 1 , further comprising a setting unit that sets a setting for interchanging of the phase rotation of the voltage command data,
wherein the setting unit supplies the setting for interchanging of the phase rotation of the voltage command data to the voltage command data interchanging unit, and the current feedback data interchanging unit.

3. The motor control device according to claim 2 , wherein the setting unit detects the connection phase rotation of the motor, and supplies the connection phase rotation of the motor to the voltage command data interchanging unit and the current feedback data interchanging unit.

4. The motor control device according to claim 1 ,
wherein the voltage command data interchanging unit outputs an alarm, in a case of the setting for interchanging of the phase rotation of the voltage command data and the connection phase rotation of the motor not being consistent.

5. The motor control device according to claim 1 ,
wherein the voltage command data interchanging unit outputs an alarm in a case of the setting for interchanging of the phase rotation of the voltage command data and the connection phase rotation of the motor not being consistent, and a command for flowing excitation current of the motor being outputted externally.

6. A motor control method for controlling a motor of a machine tool, the method comprising the steps of:
outputting voltage command data that instructs a voltage to be applied to the motor, based on an external instruction;
outputting by interchanging or not interchanging the voltage command data, based on a setting for interchanging of a phase rotation of the voltage command data;
driving the motor based on the voltage command data outputted in the step of outputting by interchanging or not interchanging the voltage command data;
detecting electric current flowing through the motor, and outputting current feedback data; and
outputting by interchanging or not interchanging the current feedback data, based on the setting for interchanging of the phase rotation of the voltage command data,
wherein the step of outputting by interchanging or not interchanging the voltage command data includes:
a step of interchanging the voltage command data, in a case of the setting for interchanging of the phase rotation of the voltage command data and the connection phase rotation of the motor being consistent, based on a set phase rotation for interchanging of the phase rotation of the voltage command data, and
a step of outputting the voltage command data as is without interchanging, in a case of the setting for interchanging of the phase rotation of the voltage command data and the connection phase rotation of the motor not being consistent, and
wherein the step of outputting by interchanging or not interchanging the current feedback data includes:
a step of interchanging the current feedback data, in a case of the setting for interchanging of the phase rotation of the voltage command data and the connection phase rotation of the motor being consistent, based on a set phase rotation for interchanging of the phase rotation of the voltage command data, and
a step of outputting the current feedback data as is without interchanging, in a case of the setting for interchanging of the phase rotation of the voltage command data and the connection phase rotation of the motor not being consistent.

7. A non-transitory computer readable medium encoded with a computer program for enabling a computer to operate as a motor control device for controlling a motor of a machine tool, the computer program causing the computer to execute:
voltage command output processing of outputting voltage command data that instructs a voltage to be applied to the motor, based on an external instruction;
voltage command data interchanging processing of outputting by interchanging or not interchanging the voltage command data, based on a setting for interchanging of a phase rotation of the voltage command data;
processing of supplying the voltage command data outputted by the voltage command data interchanging unit to a predetermined amplifier, and driving the motor by the amplifier;
current detection processing of detecting electric current flowing through the motor, and outputting current feedback data; and
current feedback data interchanging processing of outputting by interchanging or not interchanging the current feedback data, based on the setting for interchanging of the phase rotation of the voltage command data,
wherein the voltage command data interchanging processing includes:
processing of interchanging the voltage command data, in a case of the setting for interchanging of the phase rotation of the voltage command data and the connection phase rotation of the motor being consistent, based on a set phase rotation for interchanging of the phase rotation of the voltage command data, and
processing of outputting the voltage command data as is without interchanging, in a case of the setting for interchanging of the phase rotation of the voltage command data and the connection phase rotation of the motor not being consistent, and
wherein the current feedback data interchanging processing includes:
processing of interchanging the current feedback data, in a case of the setting for interchanging of the phase rotation of the voltage command data and the connection phase rotation of the motor being consistent, based on a set phase rotation for interchanging of the phase rotation of the voltage command data, and
processing of outputting the current feedback data as is without interchanging, in a case of the setting for interchanging of the phase rotation of the volt

Assignees

• Fanuc Corp

Inventors

• Okita Tadashi
• Morita Yuuki
• Tajima Daisuke

Classifications

• H02P1/40 Primary

  in either direction of rotation · CPC title

• H02P6/18 Primary

  without separate position detecting elements · CPC title

• H02P6/16

  Circuit arrangements for detecting position · CPC title

• H02P21/18

  Estimation of position or speed · CPC title

• H02P23/14

  Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage · CPC title