US 10,090,789 B2Granted

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

AssigneeFanuc Corporation

InventorsTadashi Okita, Yuuki Morita, Daisuke Tajima

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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.

Claims7

Dependent claims

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.

8 more elements

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.

9 more elements

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 voltage command data and the connection phase rotation of the motor not being consistent.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/657,516Filed 24 Jul 2017
Priority: JP 2016-14730027 Jul 2016
Published: US 2018/0034391 A11 Feb 2018
Granted: 2 Oct 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H02P 6/18
Circuit arrangements for detecting position: without separate position detecting elements
H02P 1/40
For starting an individual polyphase induction motor: in either direction of rotation
H02P 6/16
Electronic commutators: circuit arrangements for detecting position
H02P 21/18
Estimation or adaptation of machine parameters, e.g. flux, current or voltage: estimation of position or speed