Title:
CONTROLLER OF PERMANENT MAGNET SYNCHRONOUS MOTOR
Document Type and Number:
WIPO Patent Application WO/2005/093942
Kind Code:
A1
Abstract:
A controller of a permanent magnet synchronous motor comprising an inverter (9) for receiving a DC voltage and converting it into an AC voltage having variable voltage and variable frequency so as to drive a permanent magnet synchronous motor (14), a speed controller (22) generating a command of a q-axis current component in the direction perpendicular to the magnetic field of the motor (14) according to a speed command signal, a loss calculation section (50) for calculating a loss from the sum of a copper loss value and an iron loss value of the motor (14), a d-axis current generator (52) generating a d-axis current command signal flowing to the motor according to a value obtained by subtracting the loss value from the rated loss value of the motor (14), and a resistor ON judging section (58) for judging whether the motor (14) is in regenerative state according to the DC voltage and operating the d-axis current generator (52) if it is in regenerative state.
Inventors:
ITOU NOBUO (JP)
HORII KEITA (JP)
HORII KEITA (JP)
Application Number:
PCT/JP2004/004044
Publication Date:
October 06, 2005
Filing Date:
March 24, 2004
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
ITOU NOBUO (JP)
HORII KEITA (JP)
ITOU NOBUO (JP)
HORII KEITA (JP)
International Classes:
H02P21/00; H02P21/02; H02P21/06; H02P21/14; (IPC1-7): H02P21/00
Foreign References:
| JP2001095300A | 2001-04-06 | |||
| JPH05137377A | 1993-06-01 | |||
| JP2003047300A | 2003-02-14 |
Attorney, Agent or Firm:
Miyata, Kaneo c/o Mitsubishi Denki Kabushiki Kaisha (2-3 Marunouchi 2-Chome, Chiyoda-k, Tokyo 10, JP)
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