Title:
A VOLTAGE REGULATION AND CONTROL CIRCUIT OF ILLUMINATION LAMPLIGHT
Document Type and Number:
WIPO Patent Application WO/2008/074231
Kind Code:
A1
Abstract:
A voltage regulation and control circuit of illumination lamplight is applied to a single-phase illumination system composed of a main power supply and lighting loads which are in series. The single-phase illumination system includes: a main power supply for outputting sine alternating current, lighting loads; a voltage regulation and control circuit of illumination lamplight which is in series in the loop formed with the main power supply and lighting loads, and includes a voltage regulation circuit and an auxiliary power supply. The voltage regulation circuit produces an auxiliary voltage to regulate and control the amplitude value of sinealternating current voltage on the lighting loads. The power consumption of this voltage regulation and control circuit of illumination lamplight is lower, and the harmonic waves on the lighting loads is also very small, so the alternating voltage on the lighting loads is still a sinusoid and satisfies with the normal voltage demand of lighting system loads. Especially for HID lamps and fluorescent lamps, the input of sinusoid voltage decreases flicker and increases power factor, prolongs the service life of light fixtures. The method can also be applied to other light fixtures with sinusoid voltage input.
Inventors:
CHENG KAWAI ERIC (CN)
CHOI WAIFUNG (CN)
CHEONG CHIKEONG (CN)
LU YAN (CN)
CHOI WAIFUNG (CN)
CHEONG CHIKEONG (CN)
LU YAN (CN)
Application Number:
PCT/CN2007/003726
Publication Date:
June 26, 2008
Filing Date:
December 21, 2007
Export Citation:
Assignee:
UNIV HONG KONG POLYTECHNIC (CN)
CHENG KAWAI ERIC (CN)
CHOI WAIFUNG (CN)
CHEONG CHIKEONG (CN)
LU YAN (CN)
CHENG KAWAI ERIC (CN)
CHOI WAIFUNG (CN)
CHEONG CHIKEONG (CN)
LU YAN (CN)
International Classes:
H05B41/38
Foreign References:
| CN87204363U | 1988-08-17 | |||
| CN2199662Y | 1995-05-31 | |||
| JP2005102347A | 2005-04-14 |
Attorney, Agent or Firm:
LUNG TIN INTERNATIONAL INTELLECTUAL PROPERTY AGENTLTD. (Tower B Grand Place,No.5 Huizhong Road,Chaoyang District, Beijing 1, CN)
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