Motor control device and machine tool
AssigneeFanuc Corporation
InventorsDaisuke Tajima, Yuuki Morita, Tadashi Okita
Life of this patent
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Abstract
A motor control device according to an aspect of the present disclosure controls a motor by switching between speed control and position control, and sets a maximum voltage applied to the motor during the position control to lower than a maximum voltage applied to the motor during the speed control.
Claims6
A motor control device which controls a motor by switching between speed control and position control, the motor control device comprising:
- a power source, wherein
- the motor control device sets a maximum voltage applied to the motor during the position control to lower than a maximum voltage applied to the motor during the speed control,
- the maximum voltage applied to the motor during the speed control is a rated voltage of the power source, and
- the maximum voltage applied to the motor during the position control is an actual voltage of the power source.
A motor control device which controls a motor by switching between speed control and position control, comprising:
- an induction motor control section which sets a speed of the motor at which starting to decrease d-phase current and q-phase current during the position control to lower than during the speed control,
- wherein the motor control device sets a maximum voltage applied to the motor during the position control to lower than a maximum voltage applied to the motor during the speed control.
A motor control device which controls a motor by switching between speed control and position control, comprising:
- a synchronous motor control section which sets a speed of the motor at which starting to apply d-phase current during the position control to lower than during the speed control,
- wherein the motor control device sets a maximum voltage applied to the motor during the position control to lower than a maximum voltage applied to the motor during the speed control.
Dependencies are inferred from the claim text.