LED driving power supply

Abstract

An LED driving power supply comprises an LED driving power supply body, a storage battery, an output high voltage monitoring circuit, an output low voltage monitoring circuit, a switching circuit and a prompt control circuit. The LED driving power supply body, the storage battery, the output high-voltage monitoring circuit, the output low-voltage monitoring circuit, the switching circuit and the prompt control circuit are arranged in the element box and are electrically connected. Based on the LED power supply body, under the action of the switching circuit in application, the LED power supply can supply power to the LED lamp bead group, the output low-voltage monitoring circuit and the output high-voltage monitoring circuit monitor the magnitude of power supply voltage output by the LED power supply body in real time, and when the output power supply is too high or too low, the LED lamp bead group can be powered off. The output power supply can be cut off in time through the switching circuit, the storage battery is switched to supply power to the LED lamp beads, and related personnel can be prompted to carry out maintenance through the buzzer in time. Safe, stable and reliable work of the LED lamp beads is guaranteed as much as possible, and the LED lamp has good application prospects on the basis of the LED lamp beads.

Description

Technical Field

[0001] The utility model relates to the technical field of LED power supply equipment, in particular to an LED driving power supply. Background Art

[0002] LED lights have become the mainstream products for indoor lighting such as home use due to their energy-saving, environmental protection and long service life. The main function of the power supply of LED lights is to convert the AC 220V power supply into a DC power supply to power the LED lights.

[0003] With the development of technology, the power supply technology for LED lamps has also made certain progress. The authorized patent of my country with patent number "201520851982.5" and patent name "LED power supply" records that "the beneficial technical effect of the utility model LED power supply is that it can effectively reduce the working temperature of electronic devices, so that they can give full play to their working performance, and effectively improve reliability and stability. In addition, the structure is simple and easy to use." Although the above patent has achieved the technical effect of the invention described in it, it is limited by structure and function. Like other existing LED lamp power supplies in the field, it still has the following technical shortcomings that need to be improved. Specifically, the current LED lamp power supply does not have the output voltage monitoring function. When the power supply voltage output to the LED lamp is too high or too low due to various reasons (such as damage to related electronic components of the circuit or performance degradation), it will cause the LED lamp to work abnormally or even damaged. In summary, it is very necessary to provide an LED driver power supply that can effectively monitor the output voltage and prevent damage to LED lamp beads as much as possible. Utility Model Content

[0004] In order to overcome the drawbacks of the existing power supplies for LED lamps due to structural limitations as described in the background, the utility model provides an LED power supply body, which can not only supply power to the LED lamp bead group in application, but also monitor the output power supply voltage in real time. When the output voltage is too high or too low, it can promptly disconnect the output power supply and switch the battery to supply power to the LED lamp bead group, and promptly prompt relevant personnel to perform maintenance, thereby ensuring the safe, stable and reliable operation of the LED lamp beads as much as possible.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] An LED driving power supply comprises an LED driving power supply body and a battery, characterized in that it also comprises an output high voltage monitoring circuit, an output low voltage monitoring circuit, a switching circuit and a prompt control circuit; the LED driving power supply body, the battery, the output high voltage monitoring circuit, the output low voltage monitoring circuit, the switching circuit and the prompt control circuit are installed in a component box; the power output end of the LED driving power supply body is electrically connected to the output high voltage monitoring circuit, the output low voltage monitoring circuit, the switching circuit and the power input end of the battery; the signal output end of the output high voltage monitoring circuit and the output low voltage monitoring circuit is electrically connected to the signal input end of the switching circuit, the signal input end of the prompt control circuit is electrically connected to the trigger end of the switching circuit, the control output end of the prompt control circuit is electrically connected to the control input end of the switching circuit, the two poles of the battery are electrically connected to the adapter end of the switching circuit, and the power output end of the switching circuit is electrically connected to the power input end of the LED lamp group.

[0007] Furthermore, the battery is equipped with electrically connected diodes, and the positive electrode of the battery is connected to the negative electrode of the first diode and the positive electrode of the second diode.

[0008] Furthermore, the output high voltage monitoring circuit includes an electrically connected three-terminal voltage detector, an adjustable resistor, a resistor, and a diode, wherein the positive power supply input terminal of the three-terminal voltage detector is connected to one end of the adjustable resistor and one end of the resistor, the negative power supply input terminal of the three-terminal voltage detector is connected to the other end of the resistor, and the output terminal of the three-terminal voltage detector is connected to the positive electrode of the diode.

[0009] Furthermore, the output low voltage monitoring circuit includes an electrically connected three-terminal voltage detector, an adjustable resistor, a resistor, a diode, and a transistor, the positive power supply input terminal of the three-terminal voltage detector is connected to one end of the adjustable resistor and one end of the resistor, the negative power supply input terminal of the three-terminal voltage detector is connected to the other end of the resistor, the output terminal of the three-terminal voltage detector is connected to the base of the transistor, the collector of the transistor is connected to the positive electrode of the diode, and the other end of the adjustable resistor is connected to the emitter of the transistor.

[0010] Furthermore, the switching circuit includes an electrically connected resistor, a thyristor, and a relay, the thyristor anode is connected to the first normally closed contact terminal of the relay, the thyristor cathode is connected to the positive power input terminal of the relay, the second normally closed contact terminal of the relay is connected to the negative power input terminal, one of the control contact terminals of the relay is connected to one end of the first resistor, and the thyristor control terminal is connected to one end of the second resistor.

[0011] Furthermore, the prompt control circuit includes an electrically connected relay and a buzzer, and two ends of the buzzer power input and two ends of the relay power input are respectively connected.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the utility model is based on the LED power source body, and can supply power to the LED lamp bead group under the action of the switching circuit in the application, and the output low-voltage monitoring circuit and the output high-voltage monitoring circuit can monitor the power supply voltage output by the LED power source body in real time. When the output power is too high or too low, the output power can be disconnected in time through the switching circuit and the battery can be switched to supply power to the LED lamp bead, and the buzzer can be used to prompt the relevant personnel to perform maintenance in time. The utility model ensures the safe, stable and reliable operation of the LED lamp bead as much as possible. Based on the above, the utility model has a good application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a schematic diagram of the new structure of the utility model.

[0015] Figure 2 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0016] Figure 1 , 2 As shown in the figure, an LED driving power supply includes an LED driving power supply body A1, a battery G1, and also has an output high-voltage monitoring circuit 1, an output low-voltage monitoring circuit 2, a switching circuit 3, and a prompt control circuit 4; the LED driving power supply body A1, the battery G1, the output high-voltage monitoring circuit 1, the output low-voltage monitoring circuit 2, the switching circuit 3, and the prompt control circuit 4 are installed on a circuit board in a component box.

[0017] Figure 1 , 2As shown in , the battery G1 is equipped with two diodes VD and VD3 connected via circuit board wiring. The positive electrode of the battery G1 is connected to the negative electrode of the first diode VD and the positive electrode of the second diode VD3. The output high voltage monitoring circuit includes a three-terminal voltage detector E, an adjustable resistor RP, a resistor R2, and a diode VD1 connected via circuit board wiring. The positive power input terminal 2 of the three-terminal voltage detector E is connected to one end of the adjustable resistor RP and one end of the resistor R2. The negative power input terminal 3 of the three-terminal voltage detector E is connected to the other end of the resistor R2. The output terminal 1 of the three-terminal voltage detector E is connected to the positive electrode of the diode VD1. The output low voltage monitoring circuit includes a three-terminal voltage detector E2, an adjustable resistor RP1, a resistor R3, a diode VD2, and a transistor Q1 connected via circuit board wiring. The positive power input terminal 2 of the three-terminal voltage detector E2 is connected to one end of the adjustable resistor RP1 and one end of the resistor R3, the negative power input terminal 3 of the three-terminal voltage detector E2 is connected to the other end of the resistor R3, the output terminal 1 of the three-terminal voltage detector E2 is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the positive electrode of the diode VD2, and the other end of the adjustable resistor RP1 is connected to the emitter of the transistor Q1. The switching circuit includes resistors R1 and R4, thyristor VS1, and relay K1 connected via circuit board wiring. The anode of thyristor VS1 is connected to the first normally closed contact terminal of relay K1, the cathode of thyristor VS1 is connected to the positive power input terminal of relay K1, the second normally closed contact terminal of relay K1 is connected to the negative power input terminal, one of the control contact terminals of relay K1 is connected to one end of the first resistor R4, and the control terminal of thyristor VS1 is connected to one end of the second resistor R1. The prompt control circuit includes relay K2 and buzzer B1 connected via circuit board wiring, and the two ends of the power input of buzzer B1 are connected to the two ends of the power input of relay K2 respectively.

[0018] Figure 1 , 2As shown in the figure, the power input terminals 1 and 2 of the LED driver power supply body E1 and the two poles of the AC 220V power supply are connected through wires, and the power output terminals 3 and 4 of the LED driver power supply body E1 and the other end of the adjustable resistor RP and the other end of the resistor R2 of the power input terminal of the output high-voltage monitoring circuit, one end of the adjustable resistor RP1 and the other end of the resistor R3 of the power input terminal of the output low-voltage monitoring circuit, the anode of the thyristor VS1 of the power input terminal of the switching circuit and the negative power input terminal of the relay K1, the positive pole of the diode VD and the negative pole of the battery G1 are connected through wires. The signal output terminal of the output high-voltage monitoring circuit, the negative pole of the diode VD1, the signal output terminal of the output low-voltage monitoring circuit, and the other end of the resistor R1 of the signal input terminal of the switching circuit are connected through wires. The positive power input terminal and the negative power input terminal of the relay K2 of the prompt control circuit and the positive power input terminal and the negative power input terminal of the trigger terminal relay K1 of the switching circuit are connected through wires. The control contact end and the normally closed contact end of the control output end relay K2 of the prompt control circuit and the two ends of the control input end resistor R4 of the switching circuit are connected via wires respectively, the negative electrode of the diode VD3 of the battery G1 and the negative electrode of the battery G1 and the two normally open contact ends of the transfer end relay K1 of the switching circuit are connected via wires respectively, the other end of the power output end resistor R4 of the switching circuit and the other control contact end of the relay K1 and the two ends of the power input of the LED lamp group VL are connected via wires respectively.

[0019] Figure 1 , 2As shown in the figure, when the new type is working, the power output end of the LED driver power supply body E1 outputs 5V DC power through the two normally closed contact ends of the relay K1 and the two control contact ends through the resistor R4 to reduce the voltage and limit the current (3.2V) to supply power to the LED lamp bead group. Normally, the 5V power output from the 3rd and 4th pins of the LED driver power supply body E1 is converted to about 4.2V DC through the diode VD for unidirectional conduction and voltage reduction (voltage drop of about 0.8V) to charge the lithium battery G1, ensuring that when the LED driver power supply body E1 stops outputting power, the LED lamp bead group VL can be powered and work. After the output high-voltage monitoring circuit is powered on, when the LED driver power supply body E1 works normally and the output power is normal and around 5V, the 5V power supply enters the 2nd pin voltage of the three-terminal voltage detector E through the adjustable resistor RP and the resistor R2, which is less than the 4.75V threshold voltage inside the three-terminal voltage detector E. The 1st pin of the three-terminal voltage detector E outputs a low level, the thyristor VS1 will not be triggered to turn on, the power-off control contact end and the normally closed contact end of the relay K1 continue to be closed, and the 5V power supply continues to supply power to the power input ends of the LED lamp group VL through the two normally closed contact ends and the two control contact ends of the relay K1. When, due to various reasons, the LED drive power supply body E1 does not work properly (for example, internal electronic components are damaged) and the output power is higher than about 5V, the 5V power supply enters the 2-pin voltage of the three-terminal voltage detector E through the adjustable resistor RP and the resistor R2, which is higher than the 4.75V threshold voltage inside the three-terminal voltage detector E. The 1-pin of the three-terminal voltage detector E outputs a high level (the diode VD1 is unidirectionally conductive), the thyristor VS1 will be triggered to turn on (the resistor R1 reduces the voltage and limits the current), the relay K1 is energized to close its control contact end and the normally closed contact end to open the circuit, and its control contact end and the normally open contact end are closed.

[0020] Figure 1 , 2As shown, after the output low-voltage monitoring circuit is powered on, when the LED driving power supply body E1 works normally and the output power is normal and about 5V, the 5V power supply enters the 2-pin voltage of the three-terminal voltage detector E2 through the adjustable resistor RP1 and the resistor R3, which is greater than the 4.75V threshold voltage inside the three-terminal voltage detector E2. The 1-pin of the three-terminal voltage detector E2 outputs a high level, the thyristor VS1 will not be triggered to turn on, the relay K1 continues to close the power-off control contact terminal and the normally closed contact terminal, and the 5V power supply continues to supply power to the power input terminals of the LED lamp group VL through the two normally closed contact terminals and the two control contact terminals of the relay K1. When the LED driving power supply body E1 does not work properly due to various reasons (such as damage to internal electronic components) and the output power is lower than about 5V, the 5V power supply enters the 2nd pin voltage of the three-terminal voltage detector E2 through the adjustable resistor RP2 and the resistor R3, which is lower than the 4.75V threshold voltage inside the three-terminal voltage detector E2. The 1st pin of the three-terminal voltage detector E2 outputs a low level, and the low level enters the base of the transistor Q1. The transistor Q1 is turned on and the collector outputs a high level (the diode VD2 is unidirectionally conducted) and enters the control electrode of the thyristor VS1. The thyristor VS1 will be triggered to turn on (the resistor R1 reduces the voltage and limits the current), and the relay K1 is energized to attract its control contact end and the normally closed contact end to open the circuit, and its control contact end and the normally open contact end are closed.

[0021] Figure 1 , 2 As shown in the figure, when the voltage output by the LED driving power source body E1 is too high or too low, the relay K1 is energized to close its control contact terminal and the normally closed contact terminal is open, L The ED drive power supply body E1 no longer supplies power to the LED lamp bead group VL; after the relay K1 is energized and its control contact terminal and normally open contact terminal are closed, the power output by the battery G1 is converted to about 3.2V through the unidirectional conduction and voltage drop (about 0.8V) of the diode VD3, and supplies power to the power input terminals of the LED lamp group VL through the two normally open contact terminals and two control contact terminals of the relay K1; when the thyristor VS1 is turned on and the relay K1 is energized, the relay K2 and the buzzer B1 will be energized and work; when the relay K2 is energized and the control contact terminal and the normally open contact terminal are closed, the control contact terminal and the normally open contact terminal of the relay K2 short-circuit the two terminals of the resistor R4, so that the 3.2V power output by the battery is no longer subject to the voltage reduction and current limiting effect of the resistor R4, and directly supplies power to the power input terminals of the LED lamp group VL (to prevent the LED lamp bead group from working abnormally due to low voltage). The buzzer B1 is energized and sounds, and the user can promptly know that the output power voltage of the LED driving power supply body E1 is abnormal after hearing it.

[0022] Figure 1 , 2As shown, through the action of all the above circuits, in the application, under the action of the switching circuit, the LED lamp bead group can be powered, and the power supply voltage output by the LED power supply body can be monitored in real time. When the output power voltage is too high or too low, the output power can be disconnected in time through the switching circuit and the battery can be switched to power the LED lamp beads. The relevant personnel can also be prompted to perform maintenance in time through the buzzer, which reduces the probability of damage to the LED lamp bead group due to abnormal voltage, and ensures the safe, stable and reliable operation of the LED lamp beads as much as possible (battery G1 assists in power supply. When the output voltage of the LED drive power supply body E1 is abnormal and there is no power maintenance, the LED lamp bead group can still be powered and work normally for a period of time (generally 5 hours). In this new type, a power switch S1 is connected in series between the other control contact end of the relay K1 and the negative power input end of the LED lamp bead group VL (the handle is located outside the front opening of the component box. After turning off the power switch S1, when it is not used, the power output of the battery will not enter the power input end of the LED lamp bead group VL). Figure 2 In the figure, the battery G1 is a 4V / 15Ah lithium battery; the diodes VD, VD3, VD1, and VD2 are 1N4007; the relays K1 and K2 are DC12V (the relay K1 has two power input terminals, two control contact terminals, two normally open contact terminals, and two normally closed contact terminals; the relay K2 has two power input terminals, one control contact terminal, one normally open contact terminal, and one normally closed contact terminal); the transistor Q1 is a 9012 PNP transistor; the three-terminal voltage detectors E and E2 are AN051A; the resistance values ​​of the resistors R2, R3, R1, and R4 are 4.75K, 4.75K, 4.7K, and 360Ω, respectively; L The ED drive power supply body E1 is a finished product of an input AC 220V to DC 5V power supply module, which has two power input terminals and two power output terminals; the LED lamp bead group VL is a 10W LED lamp bead; the adjustable resistors RP and RP1 have a resistance of 4K (adjusted to 250Ω and 255Ω respectively).

[0023] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0024] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An LED driving power supply, comprising an LED driving power supply body and a battery, characterized in that: It also has an output high-voltage monitoring circuit, an output low-voltage monitoring circuit, a switching circuit, and a prompt control circuit; the LED driving power supply body, the battery, the output high-voltage monitoring circuit, the output low-voltage monitoring circuit, the switching circuit, and the prompt control circuit are installed in a component box; the power output end of the LED driving power supply body is electrically connected to the output high-voltage monitoring circuit, the output low-voltage monitoring circuit, the switching circuit, and the power input end of the battery; the signal output end of the output high-voltage monitoring circuit and the output low-voltage monitoring circuit is electrically connected to the signal input end of the switching circuit, the signal input end of the prompt control circuit is electrically connected to the trigger end of the switching circuit, the control output end of the prompt control circuit is electrically connected to the control input end of the switching circuit, the two poles of the battery are electrically connected to the adapter end of the switching circuit, and the power output end of the switching circuit is electrically connected to the power input end of the LED lamp group.

2. The LED driving power supply according to claim 1, characterized in that: The battery is equipped with an electrically connected diode, and the positive electrode of the battery is connected to the negative electrode of the first diode and the positive electrode of the second diode.

3. The LED driving power supply according to claim 1, characterized in that: The output high voltage monitoring circuit includes an electrically connected three-terminal voltage detector, an adjustable resistor, a resistor, and a diode. The positive power supply input terminal of the three-terminal voltage detector is connected to one end of the adjustable resistor and one end of the resistor, the negative power supply input terminal of the three-terminal voltage detector is connected to the other end of the resistor, and the output terminal of the three-terminal voltage detector is connected to the positive electrode of the diode.

4. The LED driving power supply according to claim 1, characterized in that: The output low voltage monitoring circuit includes an electrically connected three-terminal voltage detector, an adjustable resistor, a resistor, a diode, and a transistor. The positive power supply input terminal of the three-terminal voltage detector is connected to one end of the adjustable resistor and one end of the resistor, the negative power supply input terminal of the three-terminal voltage detector is connected to the other end of the resistor, the output terminal of the three-terminal voltage detector is connected to the base of the transistor, the collector of the transistor is connected to the positive electrode of the diode, and the other end of the adjustable resistor is connected to the emitter of the transistor.

5. The LED driving power supply according to claim 1, characterized in that: The switching circuit includes an electrically connected resistor, a thyristor, and a relay, wherein the thyristor anode is connected to the first normally closed contact terminal of the relay, the thyristor cathode is connected to the positive power input terminal of the relay, the second normally closed contact terminal of the relay is connected to the negative power input terminal, one of the control contact terminals of the relay is connected to one end of the first resistor, and the thyristor control terminal is connected to one end of the second resistor.

6. The LED driving power supply according to claim 1, characterized in that: The prompt control circuit includes an electrically connected relay and a buzzer, and two ends of the buzzer power input are connected to two ends of the relay power input respectively.

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