DC Low Voltage Double Push Injection Phase Locked Power Combination Low Pressure Sodium Lamp

Abstract

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 low-pressure sodium lamp. The two self-oscillating chips 4 and 6 are connected to the timing resistance-capacitance elements R2 and C4, and oscillate synchronously. The self-oscillating chip 4 and the push-pull amplifier A output power transformer T1 are connected with the self-oscillating chip 6 and the push-pull amplifier B output power transformer T2. Add a coupler, the power synthesis feeds the lamp tube circuit to ignite the low-pressure sodium lamp, and the reference crystal oscillator signal is injected into the RC oscillator of the two self-oscillating chips 4 and 6 through the frequency divider to lock the phase, so as to avoid excessive temperature rise of the device, oscillation frequency change, and power imbalance. decline. The invention is suitable for low-voltage sodium lamp lighting occasions powered by DC low voltage and high current.

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 low-pressure sodium lamp. Background technique [0002] Electronic ballasts in the prior art usually use LC or RC oscillators as low-voltage sodium electric 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 this electronic ballast has high current, it is simple in structure and low in cost. Due to the low power supply voltage, it is necessary to increase the device current to obtain high-power lighting, and the power consumption of the high-current oscillating power tube increases sharply and the temperature rises 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...

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Problems solved by technology

[0002] Electronic ballasts in the prior art usually use LC or RC oscillators as low-voltage sodium electric 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. high current, although this electronic ballast has 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, and the power consumption of the high-current oscillating power tube increases sharply and the temperature rises 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

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