Solar power supply injection phase-locking power synthesis high-pressure sodium lamp

Abstract

The invention relates to the technical field of electric light source illumination and specifically discloses a solar power supply injection phase-locking power synthesis high-pressure sodium lamp. The high-pressure sodium lamp comprises a high-pressure sodium lamp, a solar power supply, a reference crystal oscillator, an oscillation driving chip, a push-pull amplifier, a push-pull oscillator, an addition coupler, a lamp tube trigger circuit, a frequency modulation signal generator and a lamp tube abnormal current detector. The oscillation driving chip is connected with the push-pull amplifier. An output power transformer T1 and a push-pull oscillator output power transformer T3 are fed into the addition coupler for power synthesis, and the synthesized power further undergoes voltage boost and is then fed into the lamp tube trigger circuit for turning the high-pressure sodium lamp tube on. Signals of the reference crystal oscillator are injected into the oscillation driving chip through a frequency divider for phase locking. After power synthesis of the push-pull amplifier output power transformer T1 and the push-pull oscillator output power transformer T3, a cross-coupling injection phase-locking frequency pulls the push-pull oscillator to realize coherent synchronous phase locking, and thus large-power illumination is achieved, and luminance declination caused by power unbalance resulted from oscillation frequency change since temperature rise of a device is too high is avoided. The high-pressure sodium lamp is suitable for illumination occasions of the high-pressure sodium lamp powered by the solar power source in a low-voltage and heavy-current manner.

Description

technical field [0001] The invention relates to the technical field of electric light source lighting, in particular to a high-pressure sodium lamp of solar power injection locking power synthesis. Background technique [0002] Electronic ballasts in the prior art usually use LC or RC oscillators as electric light sources for high-pressure sodium lamps, and the oscillation frequency generated is affected by the poor stability of temperature changes, the power is unstable, and the light intensity decreases, although the structure is simple and the cost is low. Due to the low power supply voltage, to obtain high-power lighting is bound to increase the current of the device, which will cause the power consumption of the oscillating power tube to increase sharply and the temperature rise will cause the oscillation frequency to change. As a result, the power amplitude of the light changes with frequency. At the same time, when the temperature of the coil increases, the magnetic p...

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Problems solved by technology

[0002] Electronic ballasts in the prior art usually use LC or RC oscillators as the electric light source of high-pressure sodium lamps, and the oscillation frequency generated is affected by poor stability of temperature changes. 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, which will cause the power consumption of the oscillating power tube to 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

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