JPS60107599U

JPS60107599U - Discharge tube high frequency constant power drive circuit

Info

Publication number: JPS60107599U
Application number: JP19853883U
Authority: JP
Inventors: 木下　和憲
Original assignee: 株式会社日立製作所
Priority date: 1983-12-26
Filing date: 1983-12-26
Publication date: 1985-07-22

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は放電管駆動原理図、第２図はランプ電力−イン
ピーダンス特性グラフ、第３図はランプ電力−電圧特性
グラフ、第４図はランプ電圧一点灯時間変化グラフ、第
５図はランプ立切れ防止原理図、第６図は立切れ防止回
路におけるランプ電力−電圧特性図、第７図は本考案の
一実施例のランプ立切れ防止回路区である。１・・・可変ＤＣ電源、２・・・高周波インバータ、３
・・・昇圧トランス、５・・・放電管、６・・・ランプ
電圧検出回路、７・・・高圧スタータ回路、８，９・・
・コンタクタ駆動回路、１０・・・ＤＣ入力、１１・・
・インダクタ可変信号、１２・・−ＤＣ電圧可変信号、
１３・・・放電検出信号。Figure 1 is a diagram of the discharge tube drive principle, Figure 2 is a lamp power-impedance characteristic graph, Figure 3 is a lamp power-voltage characteristic graph, Figure 4 is a lamp voltage vs. lighting time change graph, and Figure 5 is a lamp stand-up graph. FIG. 6 is a lamp power-voltage characteristic diagram in the lamp breakage prevention circuit, and FIG. 7 is a diagram of the lamp breakage prevention circuit according to an embodiment of the present invention. 1... Variable DC power supply, 2... High frequency inverter, 3
... Step-up transformer, 5... Discharge tube, 6... Lamp voltage detection circuit, 7... High voltage starter circuit, 8, 9...
・Contactor drive circuit, 10...DC input, 11...
・Inductor variable signal, 12...-DC voltage variable signal,
13...Discharge detection signal.

Claims

[Scope of utility model registration request]

A discharge tube high frequency drive circuit comprising a high frequency inverter, a step-up transformer, and a choke coil, which is equipped with a discharge tube voltage detection circuit, a variable choke that is switched by the detection signal thereof, and a variable output voltage high frequency inverter. Constant power drive circuit.