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1. (WO2017200424) LED LIGHT SOURCE POWERED BY AN UNSTABLE THREE-PHASE AC NETWORK

Pub. No.:    WO/2017/200424    International Application No.:    PCT/RU2017/000353
Publication Date: Fri Nov 24 00:59:59 CET 2017 International Filing Date: Fri May 26 01:59:59 CEST 2017
IPC: H05B 37/02
Applicants: SOKOLOV, Yuriy Borisovich
СОКОЛОВ, Юрий Борисович
Inventors: SOKOLOV, Yuriy Borisovich
СОКОЛОВ, Юрий Борисович
Title: LED LIGHT SOURCE POWERED BY AN UNSTABLE THREE-PHASE AC NETWORK
Abstract:
An LED light source powered by an unstable three-phase AC network relates to lighting technology and is intended for use in LED lighting devices which run on unstable three-phase AC networks. The technical and economic results of the claimed invention are a significant reduction in the cost, an increase in the reliability and a reduction in the weight and dimensions of LED lighting drivers, as well as an increase in the efficiency thereof. An LED-based light source includes a three-phase voltage rectifier (a first voltage source), a second adaptive voltage source, a voltage sensor of the first voltage source, and a group of series-connected LEDs with a passive current source, the first and second voltage sources being matched and connected in series, and the group of LEDs, connected in series with a passive current source, being connected into their combined voltage, wherein the voltage of the adaptive (second) voltage source is controlled by the voltage sensor of the first voltage source such that the combined voltage of the two voltage sources is always constant and depends on the range of instability of an AC network and the voltage at the adaptive voltage source.