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Title:
SYNCHRONOUS MOTOR DRIVE SYSTEM AND SYNCHRONOUS MOTOR DRIVE METHOD
Document Type and Number:
WIPO Patent Application WO/2019/083050
Kind Code:
A1
Abstract:
Provided in the first embodiment according to the present invention is an inverter system that directly tracks an optimum efficiency of a three-phase permanent magnet motor (synchronous motor) in a stationary coordinate system in a simpler manner. In this embodiment, as one means for implementing an optimum efficiency control of the permanent magnet type motor, attention is paid to load angles, and a motor torque direct control method is implemented by using a carrier wave clock synchronized with a drive frequency wavelength so as to digitally detect a phase difference between an armature magnetic flux and a permanent magnet magnetic flux, which represents a load angle, and performing the control so as to match the detected phase difference with the target phase difference. In the second embodiment, as another means for implementing an optimum efficiency control of the permanent magnet type motor, attention is paid to power factor angles, and a motor torque direct control method is implemented by using a carrier wave clock synchronized with a drive frequency wavelength so as to digitally detect the phase difference between a terminal voltage phase and a terminal current phase, which represents a power factor angle, and performing the control so as to match the detected phase difference with the target phase difference.

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Inventors:
YOSHINO HOZO (JP)
Application Number:
PCT/JP2018/040202
Publication Date:
May 02, 2019
Filing Date:
October 29, 2018
Export Citation:
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Assignee:
SYSTEM HOMES KK (JP)
International Classes:
H02P27/00
Domestic Patent References:
WO2011129297A12011-10-20
Foreign References:
JP2008131782A2008-06-05
JP2007116768A2007-05-10
JPH10341587A1998-12-22
US20060061923A12006-03-23
Attorney, Agent or Firm:
TANI & ABE, P.C. (JP)
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