Title:
LIGHT-EMITTING DEVICE, FIBER LASER, AND GROUND FAULT DETERMINATION METHOD
Document Type and Number:
Japanese Patent JP2018097973
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a light-emitting device capable of determining whether a ground fault has occurred in a turned off state without using a shunt resistor for the determination.SOLUTION: A light-emitting device (1) includes a current path (11) including a plurality of laser diodes (LD1 to LD6) and a power supply (PS) provided upstream thereof, and an LD control unit (13) that judges whether a ground fault has occurred on the basis of the voltage (VPQ) at both ends of a section including the laser diode (LD1).SELECTED DRAWING: Figure 1
Inventors:
KAMEYAMA TAKASHI
Application Number:
JP2016239552A
Publication Date:
June 21, 2018
Filing Date:
December 09, 2016
Export Citation:
Assignee:
FUJIKURA LTD
International Classes:
H05B37/02; G01R31/02; H02H3/16; H02H7/00; H02H11/00
Domestic Patent References:
| JP2016195041A | 2016-11-17 | |||
| JP2016088296A | 2016-05-23 |
Attorney, Agent or Firm:
Harakenzo world patent & trademark