Direct-current low-voltage power supply four-push-pull injection-locking power synthesis electrodeless lamp group

Abstract

The invention relates to the technical field of electric light sources and specifically discloses a direct-current low-voltage power supply four-push-pull injection-locking power synthesis electrodeless lamp group. A self-sustained oscillation chip A, an output power transformer T1 of a push-pull inverter A', a self-sustained oscillation chip B, and an output power transformer T2 of a push-pull inverter B' are fed into an addition coupler TB1. A self-sustained oscillation chip C, an output power transformer T3 of a push-pull inverter C', a self-sustained oscillation chip D and an output power transformer T4 of a push-pull inverter D' are fed into an addition coupler TB2. The addition coupler TB1 and the addition coupler TB2 are fed into an addition coupler TB3 for power synthesis. The synthesized power then undergoes a voltage boost and is further fed into a lamp tube circuit for turning an electrodeless lamp group on. Signals of a reference crystal oscillator are injected into four self-sustained oscillation chips through a frequency divider for phase locking and output power stabilizing. Excessive temperature rise of the device, changes of oscillation frequency, imbalanced power and dim light are avoided. Signals of a lamp tube abnormal current detector are accessed to the SD ends of the four self-sustained oscillation chips for power tube protection. The direct-current low-voltage power supply four-push-pull injection-locking power synthesis electrodeless lamp group is suitably used in meeting rooms, living rooms and households for illumination.

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 four-push-pull injection lock power synthesis electrodeless lamp group. Background technique [0002] In the prior art, an LC or RC oscillator is usually used as the electric light source of the electrodeless lamp group. The oscillation frequency generated is affected by the poor stability of temperature changes and the power is not stable enough, resulting in a decrease in light intensity. Although the structure is simple and the cost is low. However, in order to obtain high-power lighting, the current of the device must be increased, especially for the low-voltage DC power supply. Increasing the output power can only rely on the current to do work, and the power consumption of the oscillating power tube will increase sharply and the temperature will rise too high. Unbalanced power amplitude with frequency. At the same time, ...

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Problems solved by technology

However, the oscillating voltage phase of the power synthesis is inconsistent, and the nonline

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