Title:
POWER SUPPLY DEVICE AND POWER SUPPLY DEVICE FOR WELDING
Document Type and Number:
WIPO Patent Application WO/2019/146247
Kind Code:
A1
Abstract:
This power supply device is provided with: at least a pair of inverter circuits connected in parallel; at least a pair of transformer circuits which respectively transform output voltages of the inverter circuits; a current transformer in which one of wires to be detected of each of the inverter circuits is passed through a hollow coil comprising a magnetic material core with a detection wire wound thereon; an inverter control unit which controls a plurality of switching elements constituting each of the inverter circuits so that the phase of an inverter current from each of the inverter circuits flowing through each of the wires to be detected that are passed through the current transformer is inverted; and an anomaly determination unit which determines whether, on the basis of an induced current flowing through the detection wire of the current transformer, there is an anomaly in one of the inverter circuits.
Inventors:
HAMANO YOSHIYUKI
TABATA YOSHIYUKI
MORIKAWA TETSUYA
HORIE KOTA
MISAWA TSUKASA
TABATA YOSHIYUKI
MORIKAWA TETSUYA
HORIE KOTA
MISAWA TSUKASA
Application Number:
PCT/JP2018/043795
Publication Date:
August 01, 2019
Filing Date:
November 28, 2018
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H02M3/28; B23K9/10
Foreign References:
| JPH01270769A | 1989-10-30 | |||
| JPH09149661A | 1997-06-06 | |||
| JP2010190604A | 2010-09-02 | |||
| JP2013242225A | 2013-12-05 | |||
| JP2014103732A | 2014-06-05 |
Attorney, Agent or Firm:
KAWASAKI, HASHIMOTO AND PARTNERS (JP)
Download PDF: