JPS5834397U

JPS5834397U - Low starting current type ballast for high pressure discharge lamps

Info

Publication number: JPS5834397U
Application number: JP12807781U
Authority: JP
Inventors: 「けん」持　芳生
Original assignee: 岩崎電気株式会社
Priority date: 1981-08-31
Filing date: 1981-08-31
Publication date: 1983-03-05

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の低始動電流型安定器の回路図、第２図は
本考案改良前の低始動電流型安定器の回路図、第３図は
本考案に係る低始動電流型安定器の基本回路図、第４図
は本考案の具体的実施例の回路図である。第３図におい
て、１・・・・・・交流電源、２・・・・・・限流リア
クトル、３・・・・・・放電灯、４・・・・・・限流半
導体素子、５・・・・・・正特性サーミスタ、６・・・
・・・導通制御器、７・・・・・・タイマー、８・・・
・・−高電圧パルス発生装置、９・・・・・・２次無負
荷電圧検知回路。Figure 1 is a circuit diagram of a conventional low starting current type ballast, Figure 2 is a circuit diagram of a low starting current type ballast before the improvement of the present invention, and Figure 3 is a circuit diagram of a low starting current type ballast according to the present invention. Basic circuit diagram: FIG. 4 is a circuit diagram of a specific embodiment of the present invention. In Fig. 3, 1... AC power supply, 2... Current limiting reactor, 3... Discharge lamp, 4... Current limiting semiconductor element, 5... ...Positive characteristic thermistor, 6...
... Continuity controller, 7... Timer, 8...
...-High voltage pulse generator, 9... Secondary no-load voltage detection circuit.

Claims

[Scope of utility model registration request]

(1) A current-limiting semiconductor element is connected in series with the current-limiting reactor of the discharge lamp, and its current-limiting function is activated by a timer for a certain period of time from the start of the discharge lamp, so that the lamp current at the start of the discharge lamp is kept below a certain value. In addition, a high voltage pulse generator for starting the discharge lamp is connected to a part of the winding of the current limiting reactor, and the high voltage pulse generator is connected to a part of the winding of the current limiting reactor.
A high voltage detection circuit comprising: a no-load voltage detection circuit configured to operate only when the discharge lamp is not lit; and a positive characteristic thermistor connected in parallel with the current-limiting semiconductor element. Low starting current type ballast for discharge lamps.

(2) Utility model registration scope In the ballast described in claim 1, the secondary no-load voltage detection circuit of the current limiting reactor simultaneously sends an operating signal to the high voltage pulse generator when the discharge lamp is not lit. A low starting current type ballast for a high pressure discharge lamp, characterized in that the ballast is configured to send a signal to a timer that controls the current limiting function of a current limiting semiconductor element to stop and reset the timer.