Title:
LIGHT-EMITTING DEVICE, FIBER LASER, AND, GROUND FAULT DETERMINATION METHOD
Document Type and Number:
WIPO Patent Application WO/2018/105294
Kind Code:
A1
Abstract:
Provided is a light-emitting device capable of determining, in an unlit state, whether or not a ground fault has occurred, the determination not requiring the use of a shunt resistance. This light-emitting device (1) comprises: a current path (11) including a plurality of laser diodes (LD1 to LD6) and a power source (PS) provided upstream therefrom; and an LD control unit (13) determining whether or not a ground fault has occurred on the basis of an end-to-end voltage (VPQ) from a section containing the laser diode (LD1).
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Inventors:
KAMEYAMA TAKASHI (JP)
Application Number:
PCT/JP2017/040281
Publication Date:
June 14, 2018
Filing Date:
November 08, 2017
Export Citation:
Assignee:
FUJIKURA LTD (JP)
International Classes:
H05B37/02; G01R31/02; H02H3/16; H02H7/00; H02H11/00
Foreign References:
| JP2016195041A | 2016-11-17 | |||
| JP2016088296A | 2016-05-23 | |||
| JP2012160436A | 2012-08-23 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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