Title:
ARTIFICIAL LIGHTING DEVICE AND POWER SUPPLY METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/012753
Kind Code:
A1
Abstract:
[Problem] To provide an artificial lighting device capable of suppressing harmonics with a structure including only a linear load without use of a switching element and stopping inrush current while preventing a reduction in power factor by omitting a smoothing capacitor.
[Solution] An artificial lighting device comprises: multiple LED elements (200); an input division unit (110) for dividing a three phase power supplied from a three-phase AC power supply (300) into each input to U, V, W; a full-wave rectifier (120) for performing full-wave rectification on the divided input; a single phasing unit (130) for creating a single phased output by superimposing the outputs subjected to the full-wave rectification; and a single phased power supply (140) for providing the LED elements (200) with the output from the single phasing unit (130) as a power supply. Given that inductance components and capacitance components integrated by the entire large-scale LED illumination device assembly (200) are used as a pseudo-LC filter, harmonics resulting in noise can be suppressed to thereby improve power factor via a feedback loop from the input stage of the input division unit (110) toward the large-scale LED illumination device assembly (200).
Inventors:
NAITO SOUSUKE (JP)
Application Number:
PCT/JP2018/013206
Publication Date:
January 17, 2019
Filing Date:
March 29, 2018
Export Citation:
Assignee:
MICRO COATEC CO LTD (JP)
International Classes:
H05B37/02; A01G7/00; A01G9/20
Foreign References:
| JP2014207190A | 2014-10-30 | |||
| JPH03253262A | 1991-11-12 | |||
| JP2007174723A | 2007-07-05 |
Attorney, Agent or Firm:
NAGAI,Michiaki (JP)
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