Module for driving indication lamps in high-voltage potential indicator
A high-voltage live indicator technology, applied in the direction of electric light sources, electrical components, electroluminescence light sources, etc., can solve the problems that affect the normal application of high-voltage live indicators, the current has a great influence on the LED junction temperature, and LED damage, etc., to achieve Easy to promote and apply, low cost, uniform brightness effect
Inactive Publication Date: 2018-01-16
郑洪均
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Problems solved by technology
[0003] The indicator lights of high-voltage live indicators often use LED lights. According to the electrical characteristics of LEDs, the average forward current of LEDs increases linearly with the increase of forward voltage, and the forward voltage of LEDs after forward conduction The change of the current will cause a great change in the current on the LED, and the current has a great influence on the junction temperature of the LED. Excessive current can easily cause the LED to be damaged due to the rise of the junction temperature.
The LED is damaged due to voltage changes, which will affect the normal application of the high-voltage live indicator
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[0016] Such as figure 1 As shown, the module used to drive the indicator light in the high-voltage live indicator includes a rectifier unit, a polar capacitor C1, a thermistor PTC, a rectifier diode D5, a light-emitting diode group, and a constant current controller. Among them, there are four rectifier units In the bridge rectifier circuit composed of diodes, the four diodes are respectively the first diode D1, the second diode D2, the third diode D3 and the fourth diode D4. The rectification unit has two input terminals and two output terminals. The thermistor PTC is connected to one input terminal of the rectification unit. One output terminal of the rectification unit is connected to the LED group after being connected in series with the rectifier diode D5. The other output terminal of the rectification unit grounded. The anode of the polarity capacitor C1 is connected to the line between the output terminal of the rectifier unit and the anode of the rectifier diode D5, a...
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The invention discloses a module for driving indication lamps in a high-voltage potential indicator. The module for driving indication lamps in a high-voltage potential indicator includes a rectification unit, a polar capacitor, a rectifier diode, a light emitting diode group and a constant current controller, wherein the rectification unit is provided with two input terminals and two output terminals; one output terminal of the rectification unit is connected with the light emitting diodes in series, and then is connected with the light emitting diode group, and the other output terminal is grounded; the anode of the polar capacitor is connected with the line between the output terminal of the rectification unit and the anode of the rectifier diode, and the cathode of the polar capacitoris grounded; the light emitting diode group includes a plurality of serial light emitting diodes; each light emitting diode in the light emitting diode group is connected with a reverse voltage-stabilizer tube in parallel, and the output terminal of the light emitting diode group is connected with the input terminal of the constant current controller, and the output terminal of the constant current controller is grounded. The voltage-stabilizer tubes of the module for driving indication lamps in a high-voltage potential indicator can protect the light emitting diodes, and the constant currentcontroller can guarantee that the current on the line is stable so as to guarantee normal operation of the high-voltage potential indicator.
Description
technical field [0001] The invention relates to a charging detection device for high-voltage equipment, in particular to a module for driving an indicator lamp in a high-voltage charging indicator. Background technique [0002] Nowadays, high-voltage equipment is more and more widely used in the power generation, distribution, and power transmission systems of the power system. It is particularly necessary to configure live indicators. The live indicator is a kind of prompt safety device installed directly on the high-voltage power transmission and distribution facilities, which can visually show whether the high-voltage power transmission and distribution facilities have operating voltage. When the high-voltage power transmission and distribution facilities have operating voltage, live The indicator light on the indicator flashes to warn people that the high-voltage transmission and distribution facilities are live, and there is no indication when there is no electricity. ...
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Inventor 郑洪均
Owner 郑洪均