Control device for synchronous motor
AssigneeFanuc Corporation
InventorTatsuya Senoo
Life of this patent
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Abstract
Provided is a control device for a synchronous motor, the control device including a DC excitation command generation unit which generates a command for sending a DC current with a fixed current phase to a synchronous motor, and controls the magnitude of the DC current so as to apply deceleration torque to a rotor of the synchronous motor on the basis of at least one among the angular acceleration and the angular velocity of the rotor; and a magnetic pole position acquisition unit that acquires, as information indicating the magnetic pole position, the angular position of the rotor based on the output signal when a predetermined detection end condition is satisfied.
Claims10
A control device for a synchronous motor comprising:
- a processor configured to:
- generate a command for passing direct current in a fixed current phase through the synchronous motor and control magnitude of the direct current in such a way as to apply, during execution of a direct current excitation operation by the direct current, deceleration torque to a rotor of the synchronous motor, based on at least either of angular acceleration and angular velocity of the rotor;
- and
- acquire, as information representing a magnetic pole position, an angular position of the rotor based on an output signal of a position detector in the synchronous motor when a predetermined detection ending condition is satisfied.
A control device for a synchronous motor comprising:
- a processor configured to:
- generate a command for passing direct current in a fixed current phase through the synchronous motor and control magnitude of the direct current in such a way as to apply deceleration torque to a rotor of the synchronous motor, based on at lease either of angular acceleration and angular velocity of the rotor;
- and
- acquire, as information representing a magnetic pole position, an angular position of the rotor based on an output signal of a position detector in the synchronous motor when a predetermined detection ending condition is satisfied, -wherein
- the processor applies the deceleration torque by increasing magnitude of the direct current at a timing when polarity of the angular acceleration is reversed.
A control device for a synchronous motor comprising:
- a processor configured to:
- generate a command for passing direct current in a fixed current phase through the synchronous motor and control magnitude of the direct current in such a way as to apply deceleration torque to a rotor of the synchronous motor, based on at least either of angular acceleration and angular velocity of the rotor;
- acquire, as information representing a magnetic pole position, an angular position of the rotor based on an output signal of a position detector in the synchronous motor when a predetermined detection ending condition is satisfied;
- detect angular acceleration of the rotor, based on the output signal of the position detector;
- and
- detect angular velocity of the rotor, based on the output signal of the position detector, wherein
- the processor applies the deceleration torque to the rotor by decreasing magnitude of the direct current at a timing when polarity of the angular velocity is reversed after increasing magnitude of the direct current at a timing when polarity of the angular acceleration is reversed.
Dependencies are inferred from the claim text.