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Title:
SYNCHRONOUS-MACHINE CONTROL DEVICE, COMPRESSION SYSTEM, AND REFRIGERATION-CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/047930
Kind Code:
A1
Abstract:
Provided are a synchronous-machine control device, a compression system, and a refrigeration-cycle device that enable improvement in the accuracy of estimation of the permanent-magnet magnetic flux in a synchronous machine. A synchronous-machine control device (1) is connected to: a drive circuit (2) that drives a synchronous machine (10); and a detection circuit (3) that detects current flowing in the synchronous machine (10) and outputs a detection current indicating the current. The synchronous-machine control device (1) executes: a synchronous-machine control process to specify a command voltage such that the reactive power components in the synchronous machine (10) satisfy predetermined conditions, and to control the drive circuit (2) such that the drive circuit (2) applies to the synchronous machine (10) a voltage corresponding to the command voltage; and a magnet-flux estimation process that, when the reactive power components in the synchronous machine (10) satisfy the predetermined conditions on the basis of a relationship that the armature flux linkage, the armature reaction flux, and the magnetic flux of the permanent magnets of the synchronous machine (10) satisfy, estimates the magnetic flux from the armature flux linkage found from the detected current and the command voltage, and the armature reaction flux found from the inductance and the detection current of the synchronous machine (10).

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Inventors:
MATSUYAMA TETSUYA
TANAKA YUYA
HIWATA AKIRA
Application Number:
PCT/JP2023/015441
Publication Date:
March 07, 2024
Filing Date:
April 18, 2023
Export Citation:
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Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H02P21/14; F25B49/02; H02P25/024
Domestic Patent References:
WO2022034674A12022-02-17
Foreign References:
JP2016100994A2016-05-30
JP2016127697A2016-07-11
JP2009268268A2009-11-12
JP2003235286A2003-08-22
JP2015122928A2015-07-02
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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