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Patent Searching and Data


Title:
LOAD ABNORMALITY DETECTING CIRCUIT FOR INVERTER
Document Type and Number:
WIPO Patent Application WO/2019/087542
Kind Code:
A1
Abstract:
A load abnormality detecting circuit for an inverter to detect abnormality of a load during an operation of the inverter which has a self-arc-extinguishing element as a switching element and a phase synchronizing loop controlling an output frequency to be a resonance frequency of the load, the load abnormality detecting circuit includes a phase shift detection part that detects a phase shift between a gate voltage signal controlling ON/OFF of the self-arc-extinguishing element and an output current of the inverter which is applied to the load, and that sends a first abnormal load signal based on the phase shift.

Inventors:
KANAI TAKAHIKO (JP)
YANG YUE (JP)
Application Number:
PCT/JP2018/031233
Publication Date:
May 09, 2019
Filing Date:
August 23, 2018
Export Citation:
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Assignee:
NETUREN CO LTD (JP)
International Classes:
H02M1/32; H02M7/539; H02H7/122; H02J50/12; H05B6/02
Foreign References:
JP2005166621A2005-06-23
JP2007280897A2007-10-25
JPH11329707A1999-11-30
US6226196B12001-05-01
JP2015119583A2015-06-25
Other References:
None
Attorney, Agent or Firm:
KOH-EI PATENT FIRM, P.C. (JP)
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