Double half-bridge injection phase-locked power combining electrodeless lamp

Abstract

The invention relates to the technical field of electric light source lighting, in particular to a dual half-bridge injection phase-locked power synthesis electrodeless lamp. Including power filter EMI, rectifier bridge stack, power factor correction APFC, electrodeless lamp, reference crystal oscillator, frequency divider, two self-oscillating chips 4, 6, half-bridge inverter A, half-bridge inverter B, phase Add a coupler, and the RC oscillators of the two self-oscillating chips 4 and 6 are connected to the resistance R 4 , capacitance C 5 Synchronous oscillation, self-oscillating chip 4 and half-bridge inverter A output power transformer T 1 With self-oscillating chip 6 and half-bridge inverter B output power transformer T 2 The reverse phase is fed into the summing coupler, the power synthesis is inductively coupled to the lamp lighting through the magnetic ring, and the reference crystal oscillator signal is injected into the RC oscillators of the two self-oscillating chips 4 and 6 through the frequency divider to lock the phase to obtain high-power lighting and avoid The temperature rise of the device is too high, the oscillation frequency changes, the power is unbalanced, and the light drops. The invention is suitable for lighting occasions of high-power electrodeless lamps.

Description

technical field [0001] The invention relates to the technical field of electric light source lighting, in particular to a dual half-bridge injection phase-locked power synthesis electrodeless lamp. Background technique [0002] Electronic ballasts in the prior art generally use LC or RC oscillators as electric light sources for electrodeless lamps. The oscillation frequency generated is affected by poor temperature stability and the power is not stable enough, resulting in a decrease in light intensity. Although this electronic ballast has a simple structure and low cost Low. In order to obtain high-power lighting, the current of the device must be increased, and the power consumption of the oscillating power tube will increase sharply and the temperature will rise too high, resulting in a change in the oscillation frequency. As a result, the power amplitude of the light will be unbalanced as the frequency changes. At the same time, when the large current passes through the...

AI Technical Summary

Problems solved by technology

[0002] Electronic ballasts in the prior art generally use LC or RC oscillators as electric light sources for electrodeless lamps. The oscillation frequency generated is affected by poor temperature stability and the power is not stable enough, resulting in a decrease in light intensity. Although this electronic ballast has a simple structure and low cost Low

In order to obtain high-power lighting, the current of the device must be increased, and the power consumption of the oscillating power tube will increase sharply and the temperature will rise too high, resulting in a change in the oscillation frequency. As a result, the power amplitude of the light will be unbalanced as the frequency changes.

At the same time, when the large current passes through the coil, the temperature rises and the magnetic permeability decreases, and the magnetic saturation inductance becomes smaller and the impedance tends to zero. The working time of the lamp is proportional to the temperature rise, and the temperature rise accelerates the aging of the device. Burning out components shortens service life

Images