DC low-voltage double-push-injection phase-lock power synthesis metal halide lamp

Abstract

The invention relates to the electric light source lighting technology field, in particular to a DC low-voltage double-push-injection phase lock power synthesis metal halide lamp. The RC oscillators of two self-oscillating chips 4, 6 are jointly connected with a capacitor C4 and a resistor R2 to carry out synchronous oscillation. The self-oscillating chip 4 and a push-pull amplifier A output a power transformer T1; the self-oscillating chip 6 and a push-pull amplifier B output a power transformer T2; the power transformer T1 and the power transformer T2 are fed into an addition coupler in an anti-phase manner; the power synthesis is realized and the voltage is increased, and the lamp is turned on; a reference crystal oscillator signal is injected into an RC oscillator phase lock of the two self-oscillating chips 4,6 through a frequency divider; the oscillation frequency change, power imbalance and lighting decreasing because the device temperature is too high are prevented; a frequency modulated signal generator outputs a triangular wave low frequency signal which is connected with the RC oscillators of the two self-oscillating chips 4,6 so as to prevent the lamp from flashing. The metal halide lamp of the invention is suitable for the lighting conditions of DC low-voltage and large current power supply metal halide lamps.

Description

technical field [0001] The invention relates to the technical field of electric light source lighting, in particular to a DC low-voltage double-push injection phase-locked power synthesis metal halide lamp. Background technique [0002] In the prior art, electronic ballasts generally use LC or RC oscillators as metal halide lamp light sources, and the oscillation frequency generated is affected by poor stability of temperature changes, and the power is unstable and the light intensity drops. Although the structure is simple and the cost is low. Due to the low power supply voltage, it is necessary to increase the device current to obtain high-power lighting, so that 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 th...

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Problems solved by technology

However, the phase of the power synthesis oscillation voltage is inconsistent, and the nonlinear intermodulation affects the power imbalance

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