MOTOR CONTROL METHOD AND ITS APPARATUS

Title:

MOTOR CONTROL METHOD AND ITS APPARATUS

Document Type and Number:

WIPO Patent Application WO/2003/071672

Kind Code:

A1

Abstract:

A voltage sensing section (11a) and a current sensing section (11b) sense a voltage and a current to be supplied to a motor (5), and the sensed voltage and current values are supplied to a position sensing section (12). An angular velocity outputted from the position sensing section (12) is supplied to a differentiator (13) to output an angular acceleration. A fundamental wave component extracting section (14) extracts the fundamental wave component of the angular acceleration, and supplies the extracted component to an amplitude adjusting section (15). A subtracting section (16) subtracts the output of the amplitude adjusting section (15) from an average current command. As the result of this subtraction, a current sensing value and data on rotor position from the position sensing section (12) to a current control section (17) to execute current control operation. A current command is supplied to an inverter (4) to control the voltage and the current so as to suppress a variation in velocity due to the variation in load torque. Thus, stability is enhanced, and cost-down is achieved.

Inventors:

MAEDA TOSHIYUKI (JP)

Application Number:

PCT/JP2003/002091

Publication Date:

August 28, 2003

Filing Date:

February 25, 2003

Export Citation:

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Assignee:

DAIKIN IND LTD (JP)
MAEDA TOSHIYUKI (JP)

International Classes:

H02P6/06; H02P6/08; H02P6/18; H02P6/182; H02P6/28; H02P21/00; H02P21/05; H02P21/14; H02P21/16; H02P21/18; H02P21/22; H02P21/24; H02P23/04; H02P23/14; H02P27/06; (IPC1-7): H02P6/10

Foreign References:

JPH0279793A	1990-03-20
JP2001037281A	2001-02-09
JP2003092895A	2003-03-28

Other References: