DC type fluorescent lamp light-regulator

Abstract

Being for substituting ballast, the light modulator operates under DC state, possessing features of stable brightness, light changes in stepless and wide suitable voltage range. Under user's control, ratio between maximum power and minimum power of the fluorescent lamp is larger than 10. Equal energy feeding technique with characteristics of adjustment in advance is adopted in the adjustable switch type DC equipower source as core set in the invention. The said DC equipower source restrains disturbance effect on output caused by ripple in input power source. The invention raises stability of system and lowers cost and size of system so as to suit fluorescent lamp family as a load of having negative resistance characteristic especially.

Description

(1) Technical field [0001] The technical field to which the present invention belongs is lighting electrical equipment. More specifically, the present invention relates to a switch-type direct current stable power supply capable of directly igniting fluorescent lamps. (2) Background technology [0002] Various switch-type DC stabilized power supplies that are widely used have a common feature, that is: when the working state of the load deviates, its adjustment circuit changes the conduction time of the switch in the stabilized power supply according to the feedback error information, thereby controlling the input power supply. The energy of the load makes the work of the load approach the predetermined state. However, for a certain input or load, the response of the system often exhibits oscillation characteristics. Due to the effect of feedback, the oscillation may be aggravated, or even unable to work. In this regard, in traditional technologies, large-capacity electrol...

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Problems solved by technology

This is because: classical damping technology does not have the function of detecting the current state of the system and determining its own state

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