CONTROL DEVICE FOR SYNCHRONOUS MOTOR AND ROTATIONAL POSITION DISPLACEMENT CORRECTING METHOD FOR SYNCHRONOUS MOTOR

Japanese Patent JP3789895

B2

PROBLEM TO BE SOLVED: To obtain a control device for a synchronous motor that can precisely correct the displacement of a rotational position related to a rotational position detector even in a state that a load is connected to a rotor while dispensing with a non-load detector and a motor voltage detector.
SOLUTION: The control device for the synchronous motor corrects the displacement of the rotational position related to the rotational position detector of the vector-controlled synchronous motor. The device comprises a current value generator that neglects a torque command when a phase correction command is inputted, and makes a d-axis current command and a q-axis current command zero, respectively, a current controller that outputs d-axis/q-axis voltage commands based on the d-axis/q-axis current commands, a phase correction amount detector that obtains an offset volume that makes the d-axis voltage command zero when it is not zero when the phase correction command is inputted, an adder that adds a rotor positional angle and the offset volume, and a voltage converter that obtains a three-phase voltage command based on the added value and the d-axis/q-axis voltage commands.

Shinji Nishimura
Nakayama Masakazu

JP2003054472A

June 28, 2006

February 28, 2003

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Mitsubishi Electric Corporation

H02P27/06; H02P6/06; H02P6/08; H02P6/15; H02P6/16; H02P6/17; H02P6/182; H02P21/00; H02P21/08; H02P21/18; H02P21/22; H02P21/24; H02P25/02; (IPC1-7): H02P7/63; H02P6/16

JP2004129359A
JP2002325493A
JP2002271910A
JP2001204190A
JP2001128484A
JP2000166278A
JP10080188A
JP6165561A

Michiteru Soga
Michiharu Soga
Hidetoshi Furukawa
Suzuki Kenchi
Kajinami order

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