Title:
COIL DIAGNOSIS DEVICE AND COIL DIAGNOSIS METHOD
Document Type and Number:
WIPO Patent Application WO/2019/045044
Kind Code:
A1
Abstract:
The purpose of the present invention is to diagnose the quality of a coil in a range under test that is broader than the coil on the basis of a response voltage obtained by applying an impulse voltage. A diagnosis device (1) for a coil (30) comprises: a voltage application unit (2) that applies an impulse voltage to the coil (30); a response voltage detection unit (3) that detects a response voltage from the coil (30) in response to the impulse voltage; an index computation unit (5) that computes a determination index, which indicates the electrical characteristics of the coil (30), on the basis of the response voltage; and a determination unit (6) that compares the determination index for a reference coil, which is a normal coil (30), and the determination index for a coil under test, which is a coil (30) to be diagnosed, to determine whether an abnormality is present in the coil under test. A zero cross point at which the response voltage intersects a reference voltage and/or a positive-side or negative-side peak voltage of the response voltage is used, in addition to a circuit constant of the coil (30), as the determination index.
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Inventors:
KIMURA HIDEAKI (JP)
Application Number:
PCT/JP2018/032335
Publication Date:
March 07, 2019
Filing Date:
August 31, 2018
Export Citation:
Assignee:
AISIN AW CO (JP)
International Classes:
G01R31/12; G01R31/34; G01R31/72
Foreign References:
JP2012058221A | 2012-03-22 | |||
JP2005037351A | 2005-02-10 | |||
JPH0688849A | 1994-03-29 | |||
JP2001215253A | 2001-08-10 | |||
JP2012242377A | 2012-12-10 | |||
JP2007274870A | 2007-10-18 |
Attorney, Agent or Firm:
R&C IP LAW FIRM (JP)
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