Double half-bridge injection phase-locked light-emitting diode led array lights

Abstract

The invention relates to the technical field of electric light source lighting, in particular to a double half-bridge injection phase-locked light-emitting diode LED array lamp. Including power filter EMI, rectifier bridge stack, power factor correction APFC, light-emitting diode LED array lights, reference crystal oscillator, frequency divider, two self-oscillating chips 4, 6, half-bridge inverter A, half-bridge inverter B , summing coupler, full-wave rectifier, the RC oscillators of the two self-oscillating chips 4 and 6 are connected to the resistance R 11 , capacitance C 15 Synchronous oscillation, self-oscillating chip 4 and half-bridge inverter A output power transformer T 2 With self-oscillating chip 6 and half-bridge inverter B output power transformer T 3 The reverse phase is fed into the summing coupler, and the power synthesis is driven by full-wave rectification to drive the light-emitting diode LED array lamp. 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 to obtain high-power lighting to 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 light-emitting diode LED array lamps.

Description

technical field [0001] The invention relates to the technical field of electric light source lighting, in particular to a double half-bridge injection phase-locked light-emitting diode LED array lamp. Background technique [0002] Electronic transformers in the prior art use LC or RC oscillators to drive light-emitting diode LED array lights, and the generated oscillation frequency is affected by poor temperature stability and the power is not stable enough, resulting in a decrease in light intensity. Although the electronic transformer with AC-DC-AC inverter , simple structure and low cost. 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 pa...

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Problems solved by technology

[0002] Electronic transformers in the prior art use LC or RC oscillators to drive light-emitting diode LED array lights, and the generated oscillation frequency is affected by poor temperature stability and the power is not stable enough, resulting in a decrease in light intensity. Although the electronic transformer with AC-DC-AC inverter , simple structure, low cost

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

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