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US 12,113,463 B2Granted
Motor control device
AssigneeFanuc Corporation
InventorsNaoya Nishinaga, Kenta Yamamoto
Life of this patent
Estimating the term…
Abstract
When the rotation direction of a motor is determined by a connection determination unit not to match a rotation command, the phase sequence of a current detection signal and the phase sequence of a voltage command are changed by a phase sequence change unit, or the positive/reverse polarity of an encoding signal outputted from an encoder is inverted by the phase sequence change unit, whereby the rotation direction of the motor controlled by a motor control device can match the rotation command.
Claims4
A motor control device comprising:
- a control unit configured to control a motor on a basis of voltage commands that are based on a rotation command;
- a rotation direction detection unit configured to detect a normal or reverse polarity of a rotation direction of the motor;
- and
- a current detection unit configured to detect a current flowing through each of power lines of the motor, wherein
- the control unit includes a connection determination unit for the power lines, and a phase rotation change unit,
- the connection determination unit for the power lines determines whether the rotation direction of the motor that is based on the rotation command and the rotation direction detected by the rotation direction detection unit match or mismatch each other, and
- when the rotation directions are determined to mismatch each other by the connection determination unit, the phase rotation change unit changes a phase rotation of detected current values and a phase rotation of the voltage commands, or reverses a polarity detected by the rotation direction detection unit, thereby controlling the motor.
4 more elements
Dependencies are inferred from the claim text.