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Double-full-bridge injection phase-locking power synthesis halogen lamp group

A technology of injecting phase-locking and double full bridge, which is applied in the direction of lighting devices, light sources, electrical components, etc., can solve problems such as shortened service life, unstable brightness of lamps, and accelerated device aging, so as to prolong service life and avoid temperature rise High oscillation frequency variation power imbalance, stable light effect

Inactive Publication Date: 2014-10-15
梅玉刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the prior art, LC or RC oscillators are usually used as the electric light source for halogen lamps. The oscillation frequency generated is affected by the poor stability of temperature changes and the power is not stable enough, resulting in a decrease in light intensity. Although the structure is simple and the cost is low
However, in order to obtain high-power lighting, the current of the device must be increased, 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

Method used

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  • Double-full-bridge injection phase-locking power synthesis halogen lamp group
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  • Double-full-bridge injection phase-locking power synthesis halogen lamp group

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Embodiment Construction

[0011] refer to figure 1 , 2 , 3( image 3 Taking the self-oscillating chip and the full-bridge inverter A circuit as an example, the self-oscillating chip and the full-bridge inverter B are the same), the specific implementation mode and embodiment of the present invention: including the power supply filter EMI and the rectifier bridge stack 11, power factor Calibrate APFC1, halogen lamp group 9, reference crystal oscillator 2, frequency divider 3, two self-oscillating chips 4, 6, full-bridge inverter A5, full-bridge inverter B7, summing coupler 8, lamp abnormality A current detector 10, wherein the reference crystal oscillator 2 is composed of a quartz crystal resonator JT, two inverter ICs 1 , IC 2 and resistance R 1 , capacitance C 0 、C 1 、C 2 composition, the first inverter IC 1 The bias resistor R is connected across the input and output terminals 1 , and respectively connected to the ground capacitor C 1 、C 2 , meanwhile, also across the series trimmer capaci...

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Abstract

The invention relates to the technical field of electric light source illumination, and especially relates to a double-full-bridge injection phase-locking power synthesis halogen lamp group. Two RC oscillators are connected with a resistor R11 and a capacitor C14 for synchronous oscillation. A self-sustained oscillation chip 4 and a full-bridge inverter A output power transformer T1, and a self-sustained oscillation chip 6 and a full-bridge inverter B output power transformer T2 are fed into an addition coupler in a reverse-phase way. The synthesized power matches a halogen lamp tube group. Signals of a reference crystal oscillator are injected into the RC oscillators of the two self-sustained oscillation chips 4, 6 through a frequency divider for phase locking, so that 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. Signals of a lamp tube abnormal current detector are accessed to the SD ends of the oscillators of the two self-sustained oscillation chips through a triode, so that oscillation is controlled to stop rapidly, and full-bridge inverter power MOS field effect transistors are further turned off. The halogen lamp group is suitable for commercial decoration large-power halogen lamp illumination.

Description

technical field [0001] The invention relates to the technical field of electric light source lighting, in particular to a double full-bridge injection phase-locked power synthesis halogen lamp group. Background technique [0002] In the prior art, LC or RC oscillators are usually used as the electric light source for halogen lamps, and the oscillation frequency generated is affected by the poor stability of temperature changes and the power is not stable enough, resulting in a decrease in light intensity. Although the structure is simple and the cost is low. However, in order to obtain high-power lighting, the current of the device must be increased, 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 th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B39/04
CPCY02B20/00
Inventor 阮树成梅玉刚
Owner 梅玉刚
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