CN216775075U

CN216775075U - Quick discharge circuit of LED drive power supply electrolytic capacitor

Info

Publication number: CN216775075U
Application number: CN202123090857.1U
Authority: CN
Inventors: 都金龙; 乔凯; 王迎丰; 吴永斌; 罗滨汉; 张黎晨
Original assignee: Megaphoton Inc
Current assignee: Megaphoton Inc
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-06-17
Anticipated expiration: 2031-12-09

Abstract

The utility model provides a quick discharge circuit of an electrolytic capacitor of an LED driving power supply, which comprises a rectifier bridge circuit BD, a resistor R1, a thermistor NTC, a switch S and a voltmeter, wherein two input ends of the rectifier bridge circuit BD are respectively connected with the positive electrode and the negative electrode of the electrolytic capacitor, two output ends of the rectifier bridge circuit BD are respectively connected with the first end of the thermistor NTC and the first end of the resistor R1, the second end of the thermistor NTC is connected with the first end of the switch S, the second end of the switch S is connected with the second end of the resistor R1, and the voltmeter is connected with the first end of the thermistor NTC and the first end of the resistor R1. The input part of the utility model firstly passes through the rectifier bridge, thereby achieving the purpose of not distinguishing the positive electrode and the negative electrode, the accessed digital display voltmeter can display the electrolytic capacitor voltage in real time, and when the NTC thermistor is used for discharging, the NTC heating resistance value is reduced, thereby the problem of the slow discharging speed along with the reduction of the capacitor voltage is avoided.

Description

Quick discharge circuit of LED drive power supply electrolytic capacitor

Technical Field

The utility model relates to the technical field of LED lamp driving power supplies, in particular to an electrolytic capacitor quick discharge circuit of an LED driving power supply.

Background

With the widespread use of Light Emitting Diodes (LEDs), LEDs are also increasingly used for lighting, which has the advantages of high efficiency, long lifetime, small size, controllable spectrum, and capability of short-range illumination. The LED driving power supply used in cooperation with the LED driving power supply has good application and development prospects, and when the power supply is debugged, after the input end is disconnected, the electrolytic capacitor in the LED driving power supply can still be electrified for a long time, so that people are easily injured or other electronic components are easily damaged. At this time, the electrolytic capacitor needs to be rapidly discharged, but no effective discharge circuit module is available to achieve rapid discharge.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides the rapid discharging circuit of the electrolytic capacitor of the LED driving power supply, the discharging and testing are carried out without distinguishing the anode and the cathode of the electrolytic capacitor, and the discharging speed cannot be slowed down due to the reduction of the voltage in the electrolytic capacitor.

In order to solve the problems, the technical scheme adopted by the utility model is as follows:

the utility model provides a quick discharge circuit of LED drive power supply electrolytic capacitor which characterized in that: the rectifier bridge circuit comprises a rectifier bridge circuit BD, a resistor R1, a thermistor NTC, a switch S and a voltmeter, wherein two input ends of the rectifier bridge circuit BD are respectively connected with a positive electrode and a negative electrode of an electrolytic capacitor, two output ends of the rectifier bridge circuit BD are respectively connected with a first end of the thermistor NTC and a first end of the resistor R1, a second end of the thermistor NTC is connected with a first end of the switch S, a second end of the switch S is connected with a second end of the resistor R1, and the voltmeter is connected with the first end of the thermistor NTC and the first end of the resistor R1.

Furthermore, the voltmeter adopts a digital display voltmeter, and the voltage value of the capacitor can be displayed.

Further, the power supply of the voltmeter can be a fixed power supply or a movable power supply.

Further, be provided with first wireless communication module in the voltmeter, be connected with the cell-phone through first wireless communication module, voltage information is looked over to accessible cell-phone APP.

Further, the switch S is an electronic switch or a manual switch.

Further, electronic switch is provided with wireless communication module, is connected with the cell-phone through wireless communication module, and accessible cell-phone APP controls and looks over.

Further, the resistor R1 is a constant resistor.

Compared with the prior art, the utility model has the beneficial effects that:

the voltage of the electrolytic capacitor can be displayed in real time, the input part firstly passes through the rectifier bridge, so that the purpose of not distinguishing the positive electrode and the negative electrode can be achieved, the voltage of the electrolytic capacitor can be displayed in real time by the accessed digital display voltmeter, when the NTC thermistor is used for discharging, the NTC heating resistance value is reduced, so that the problem that the discharging speed is reduced along with the reduction of the voltage of the capacitor is solved, and the digital voltmeter can be used as a direct-current voltmeter when the discharging is not needed.

The utility model is described in further detail below with reference to the drawings and the detailed description.

Drawings

Fig. 1 is a schematic cross-sectional view of the present invention after disassembly.

Detailed Description

As shown in fig. 1, a fast discharging circuit for an electrolytic capacitor of an LED driving power supply includes a rectifier bridge circuit BD, a resistor R1, a thermistor NTC, a switch S, and a voltmeter, wherein two input terminals of the rectifier bridge circuit BD are respectively connected to a positive terminal and a negative terminal of the electrolytic capacitor, the two input terminals are a P1 terminal and a P2 terminal in fig. 1, and the two input terminals are connected to the rectifier bridge BD, so that whether an input 1 is connected to a positive terminal or an input 2 is connected to a positive terminal, the input terminals are both positive and negative (the positive terminal of the rectifier bridge is used as the positive terminal, and the negative terminal of the rectifier bridge is used as the negative terminal) after passing through the rectifier bridge, and thus the problem that the positive and negative terminals of the capacitor need to be distinguished is solved. Two output ends of the rectifier bridge circuit BD are respectively connected to a first end of the thermistor NTC and a first end of the resistor R1, a second end of the thermistor NTC is connected to a first end of the switch S, a second end of the switch S is connected to a second end of the resistor R1, and the voltmeter is connected to the first end of the thermistor NTC and the first end of the resistor R1.

When the switch S is closed, the input end contacts with a capacitor to be discharged, the resistor R1 and the thermistor NTC are connected in series to consume electric energy in the capacitor to discharge, and because current flows through the thermistor NTC during discharging, the temperature can be gradually increased, the resistance can be gradually reduced, and the problem that the discharging speed is reduced along with the reduction of voltage during discharging of the capacitor can be avoided. The resistor R1 can prevent the capacitor from being discharged when the input of the capacitor is not disconnected, and the discharge circuit is protected, and if the resistor R1 is not provided, the current flowing through the resistor R can be increased along with the reduction of the resistance value of the thermistor NTC, so that the risk of damage can be avoided.

The voltmeter adopts a digital display voltmeter, the voltage value of the capacitor can be displayed, in addition, a power supply source of the voltmeter can be selected according to selected parameters and a use environment, and the voltmeter can be selected to be fixed or movable. As shown in fig. 1, the power supply end of the voltmeter is P3, be provided with the first wireless communication module who is connected with the voltmeter master control in the voltmeter, be connected with the cell-phone through first wireless communication module, still can look over voltage information through cell-phone APP.

The switch S adopts an electronic switch or a manual switch. If adopt electronic switch, then electronic switch is provided with the second wireless communication module who is connected with the electronic switch master control, is connected with the cell-phone through second wireless communication module, and accessible cell-phone APP controls and looks over.

The resistor R1 is a constant resistor, and the size of the constant resistor can be selected according to the use environment.

The electrolytic capacitor voltage can be displayed in real time, the input part firstly passes through the rectifier bridge BD, so that the purpose of not distinguishing the positive electrode and the negative electrode can be achieved, the electrolytic capacitor voltage can be displayed in real time by the accessed digital display voltmeter, when the NTC thermistor is used for discharging, the NTC heating resistance value is reduced, so that the problem that the discharging speed is reduced along with the reduction of the capacitor voltage is solved, and the digital display voltmeter can be used as a direct-current voltmeter when the discharging is not needed. Compared with the direct discharge by using a resistor, the problems of casualties and device damage caused by incomplete discharge due to the fact that the capacitor voltage is unknown after the discharge can be solved. When discharging is not needed, the switch S can be switched off, and the circuit can be directly used as a voltmeter.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. The utility model provides a LED drive power supply electrolytic capacitor circuit that discharges fast which characterized in that: the electrolytic capacitor comprises a rectifier bridge circuit BD, a resistor R1, a thermistor NTC, a switch S and a voltmeter, wherein two input ends of the rectifier bridge circuit BD are respectively connected with a positive electrode and a negative electrode of an electrolytic capacitor, two output ends of the rectifier bridge circuit BD are respectively connected with a first end of the thermistor NTC and a first end of the resistor R1, a second end of the thermistor NTC is connected with a first end of the switch S, a second end of the switch S is connected with a second end of the resistor R1, and the voltmeter is connected with the first end of the thermistor NTC and the first end of the resistor R1.

2. The LED driving power supply electrolytic capacitor fast discharge circuit of claim 1, wherein: the voltmeter adopts a digital display voltmeter and can display the voltage value of the capacitor.

3. The LED driving power supply electrolytic capacitor fast discharge circuit of claim 2, wherein: the power supply of the voltmeter can be a fixed power supply or a movable power supply.

4. The LED driving power supply electrolytic capacitor fast discharge circuit as claimed in claim 3, wherein: be provided with first wireless communication module in the voltmeter, be connected with the cell-phone through first wireless communication module, voltage information is looked over to accessible cell-phone APP.

5. The LED driving power supply electrolytic capacitor fast discharge circuit of claim 1, wherein: the switch S adopts an electronic switch or a manual switch.

6. The LED driving power supply electrolytic capacitor fast discharge circuit as claimed in claim 5, wherein: the electronic switch is provided with a wireless communication module, is connected with a mobile phone through the wireless communication module, and can be controlled and checked through a mobile phone APP.

7. The LED driving power supply electrolytic capacitor fast discharge circuit of claim 1, wherein: the resistor R1 is a constant value resistor.