DC low-voltage power supply injection locking power synthesis dimming fluorescent lamp

Abstract

The invention relates to the technical field of electric light source lighting, and particularly relates to a DC low-voltage power supply injection locking power synthesis dimming fluorescent lamp which comprises a fluorescent lamp tube, a DC low-voltage power supply, a reference crystal oscillator, a phase dimming chip, a push-pull amplifier, a push-pull oscillator and a power synthesis coupler, wherein output of the phase dimming chip and the voltage controlled oscillator (VCO) is connected to the push-pull amplifier and fed into an adding coupler through a transformer T1 and a transformer T3 of the push-pull oscillator; synthesized power and booster voltage are matched with and turn on the lamp tube; reference crystal oscillator signals are injected to the voltage controlled oscillator (VCO) through a frequency divider to lock the phase; the transformer T1 of the push-pull amplifier and the transformer T3 of the push-pull oscillator carry out power synthesis, cross coupling and injection locking, and frequency pulling is coherent with the push-pull oscillator to lock the phase synchronously; and large-power lighting is acquired, thereby avoiding too high temperature rise of devices, changes in oscillation frequency, unbalance of the power and reduction of the lamplight. The DC low-voltage power supply injection locking power synthesis dimming fluorescent lamp is applied to dimming fluorescent lamp lighting occasions with DC low voltage and large-current power supply.

Description

technical field [0001] The invention relates to the technical field of electric light source lighting, in particular to a DC low-voltage power supply injection lock power synthesis dimming fluorescent lamp. Background technique [0002] In the prior art, electronic ballasts generally use LC or RC oscillators as the light source of fluorescent lamps, and the oscillation frequency generated is poorly stabilized by temperature changes, which affects power instability and light intensity drops, especially for fluorescent lamps powered by DC low-voltage power supplies that work at low voltage and high current. Although this electronic ballast has a simple structure and low cost. Due to the low power supply voltage, it is necessary to increase the device current to obtain high-power lighting, resulting in a sharp increase in the power consumption of the oscillating power tube and an excessively high temperature rise, resulting in a change in the oscillation frequency. As a result,...

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Problems solved by technology

In addition, the non-adjustable high-power strong light is a waste of electric energy, and the strong light pollutes the environment and affects vision and hinders work or life.

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