Title:
ELECTRONIC BALLAST STARTUP OUTPUT CURRENT-LIMITED CIRCUIT FOR HIGH VOLTAGE SODIUM LAMP
Document Type and Number:
WIPO Patent Application WO/2007/076641
Kind Code:
A1
Abstract:
A electronic ballast startup output current-limited circuit for high voltage sodium
lamp (4), which includes a triggering circuit (1) and a startup circuit (2), the
startup circuit (2) has two transformer T3, T4, the triggering circuit (1) supplies
starting signal to startup circuit (2); which characterized by connecting two
relays J1, J2 between two transformers T3, T4 of startup circuit (2), secondary
coils in said two transformers being connected in series, two relays acting due
to the signal supplied by control circuit (3) after the startup circuit (2) generating
strike voltage, the primary coil in two transformers which has the current limited
function being converted from series connection to parallel connection. In
this way, on the one hand, the bulb is able to trigger startup reliably, and the
output power of electronic ballast can also meet the challenge; on the other hand,
the resistance drops to one quarter which is in series connection after parallel
connection, controls the heating-up of T3, T4, electronic ballast's whole
temperature rise drops above 30%, improves stability and reliability of electronic
ballast.
Inventors:
CHEN XIUQING (CN)
Application Number:
PCT/CN2006/000158
Publication Date:
July 12, 2007
Filing Date:
January 26, 2006
Export Citation:
Assignee:
SHI JUNSHENG (CN)
CHEN XIUQING (CN)
CHEN XIUQING (CN)
International Classes:
H05B41/14
Domestic Patent References:
| WO2003055283A1 | 2003-07-03 |
Foreign References:
| CN2051031Y | ||||
| CN2405396Y | 2000-11-08 |
Attorney, Agent or Firm:
BEIJING SUNHOPE INTELLECTUAL PROPERTY LTD. (Kunxun Plaza Zhichun Road 9 Haidian District, Beijing 3, CN)
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