LED lamp safety protection device

Abstract

The utility model discloses a LED lamp safety protection device, including a first connector and a first terminal; also including a bridge rectifier, a first capacitor, a second capacitor, a third capacitor, a three-winding transformer, a MOS tube, a first diode, a second diode, a third diode, a fourth diode, a first resistor and a second resistor; also including a second connector, a second terminal and two LED lamps; wherein the bridge rectifier includes a fifth diode, a sixth diode, a seventh diode and an eighth diode, the connector module is connected to one end of the protection circuit module, and the LED lamp assembly module is connected to the other end of the protection circuit module. The isolated power input and output are adopted, there is no direct electrical connection between the power input isolation module loop and the output loop, the power input and output are in an insulated high-resistance state, there is no current loop between the two, effectively preventing operators from electric shock, and the device is safe and reliable.

Description

Technical Field

[0001] The utility model relates to the field of LED lamp safety protection devices, in particular to an LED lamp safety protection device. Background Art

[0002] Some industrial assembly line inspection operations usually require the use of LED lights for auxiliary inspection. However, existing LED lights are generally connected to non-isolated power supplies for power supply. There is a direct current loop between the input and output of the non-isolated power supply. For example, the input and output are grounded, which can easily cause electric shock to operators and cause safety accidents. Utility Model Content

[0003] In order to overcome the above technical defects, the utility model provides an LED lamp safety protection device, which adopts isolated power input and output. There is no direct electrical connection between the power input isolation module loop and the output loop. The power input and output are in an insulated high-resistance state, and there is no current loop between the two, which effectively prevents operators from electric shock and is safe and reliable.

[0004] In order to solve the above problems, the utility model is implemented according to the following technical solutions:

[0005] The LED lamp safety protection device described in the utility model comprises a connector module, wherein the connector module comprises a first connector and a first wiring terminal;

[0006] A protection circuit module, the protection circuit module comprising a bridge rectifier, a first capacitor, a second capacitor, a third capacitor, a three-winding transformer, a MOS tube, a first diode, a second diode, a third diode, a fourth diode, a first resistor and a second resistor;

[0007] An LED lamp assembly module, the LED lamp assembly module comprising a second connector, a second wiring terminal and two LED lamps;

[0008] Wherein, the bridge rectifier includes a fifth diode, a sixth diode, a seventh diode and an eighth diode, the connector module is connected to one end of the protection circuit module, and the LED lamp assembly module is connected to the other end of the protection circuit module.

[0009] Preferably, the live wire end of the connector module is connected to the anode of the fifth diode and the cathode of the eighth diode, the cathode of the fifth diode is connected to one end of the first capacitor, the anode of the eighth diode is connected to the other end of the first capacitor, and the neutral wire end of the connector module is connected to the anode of the sixth diode and the cathode of the seventh diode.

[0010] Preferably, one end of the first capacitor is connected to one end of the three-winding transformer, the other end of the first capacitor is connected to the gate of the MOS tube, the other end of the three-winding transformer is connected to the drain of the MOS tube, and the source of the MOS tube is grounded.

[0011] Preferably, one end of the three-winding transformer is connected to the positive electrode of the first diode, the other end of the three-winding transformer is connected to the positive electrode of the second diode, the negative electrode of the first diode and the negative electrode of the second diode are connected to one end of the first resistor, the other end of the first resistor is connected to one end of the second capacitor, and the positive electrode of the second diode is connected to the other end of the second capacitor.

[0012] Preferably, one end of the second capacitor connected to the first resistor is connected to the positive electrode of the power supply, and one end of the second capacitor connected to the positive electrode of the second diode is connected to the negative electrode of the power supply.

[0013] Preferably, one end of the three-winding transformer is connected to the positive electrode of the third diode, the other end of the three-winding transformer is connected to the positive electrode of the fourth diode, the negative electrode of the third diode and the negative electrode of the fourth diode are connected to one end of the second resistor, the other end of the second resistor is connected to one end of the third capacitor, and the positive electrode of the third diode is connected to the other end of the third capacitor.

[0014] Preferably, one end of the third capacitor connected to the second resistor is connected to the positive electrode of the power supply, and one end of the third capacitor connected to the positive electrode of the third diode is connected to the negative electrode of the power supply.

[0015] Preferably, the other end of the positive electrode of the power supply is connected to the two LED lamps.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model provides an LED lamp safety protection device, which comprises a connector module, wherein the connector module comprises a first connector and a first wiring terminal; a protection circuit module, wherein the protection circuit module comprises a bridge rectifier, a first capacitor, a second capacitor, a third capacitor, a three-winding transformer, a MOS tube, a first diode, a second diode, a third diode, a fourth diode, a first resistor and a second resistor; an LED lamp component module, wherein the LED lamp component module comprises a second connector, a second wiring terminal and two LED lamps; wherein the bridge rectifier comprises a fifth diode, a sixth diode, a seventh diode and an eighth diode, the connector module is connected to one end of the protection circuit module, and the LED lamp component module is connected to the other end of the protection circuit module.

[0018] The LED lamp safety protection device provided by the utility model adopts isolated power input and output. There is no direct electrical connection between the power input isolation module loop and the output loop. The power input and output are in an insulated high-resistance state. There is no current loop between the two, which effectively prevents operators from electric shock and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is a connection principle diagram of the LED lamp safety protection device of the utility model;

[0021] In the figure:

[0022] 10-connector module;

[0023] 20- protection circuit module;

[0024] 30-LED light assembly module;

[0025] L-live wire terminal, N-neutral wire terminal, TWT-three-winding transformer, D1-first diode, D2-second diode, D3-third diode, D4-fourth diode, D5-fifth diode, D6-sixth diode, D7-seventh diode, D8-eighth diode, C1-first capacitor, C2-second capacitor, C3-third capacitor, R1-first resistor, R2-second resistor, G-gate, D-drain, S-source, V+-positive power supply, V-negative power supply. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] Figure 1 The utility model is a connection principle diagram of the LED lamp safety protection device.

[0028] like Figure 1As shown, the LED lamp safety protection device of the present embodiment technology includes a connector module 10, the connector module 10 includes a first connector and a first terminal; a protection circuit module 20, the protection circuit module 20 includes a bridge rectifier, a first capacitor C1, a second capacitor C2, a third capacitor C3, a three-winding transformer TWT, a MOS tube, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first resistor R1 and a second resistor R2; an LED lamp component module 30, the LED lamp component module 30 includes a second connector, a second terminal and two LED lamps; wherein the bridge rectifier includes a fifth diode D5, a sixth diode D6, a seventh diode D7 and an eighth diode D8, the connector module 10 is connected to one end of the protection circuit module 20, and the LED lamp component module 30 is connected to the other end of the protection circuit module 20.

[0029] It should be noted that a plug connector is a positioning joint for connecting electronic circuits. It consists of two parts, namely, a plug-in and a connector. Under normal conditions, it can be completely separated. The similarity between a switch and a connector is that the purpose of converting the connected circuit is achieved by changing the contact state of its contact pair. The essential difference is that the plug-in has only two states: insertion and removal. The switch can realize the conversion of the circuit on its body, while the connector cannot realize the conversion on the body. There is a fixed corresponding relationship between the contact pairs of the connector. Therefore, the connector can also be called a connector. The terminal block is an accessory product used to realize electrical connection. It is industrially classified as a connector. The terminal block is used to facilitate the connection of wires. It is actually a piece of metal sheet sealed in insulating plastic. There are holes at both ends for inserting wires. The terminal block can be divided into WUK terminal blocks, European terminal block series, plug-in terminal block series, etc. In a preferred embodiment, the connector module consists of a socket, a plug and a terminal block.

[0030] It should be noted that MOS is a metal-oxide semiconductor field effect transistor, or MOS field effect transistor for short. It is generally a metal-oxide-semiconductor field effect transistor, or a metal-insulator-semiconductor. It is a semiconductor device that uses the electric field effect of the control input loop to control the output loop current. Since it only conducts electricity through the majority carriers in the semiconductor, it is also called a unipolar transistor. Field effect transistors are voltage-controlled semiconductor devices. They have the advantages of high input resistance, low noise, low power consumption, large dynamic range, easy integration, no secondary breakdown, and a wide safe working area. MOS tubes have three pin names, namely gate G, source S, and drain D. There are four types of MOS tubes, namely enhancement PMOS tubes, enhancement NMOS tubes, depletion PMOS tubes, and depletion NMOS tubes. In a preferred embodiment, the MOS tube used is an enhanced NMOS tube, because it has a lower on-resistance and can be used in a more efficient switching power supply; the NMOS tube also has a high current carrying capacity and is suitable for high-power switching power supplies. A positive voltage is used in the power supply system, so it is more suitable for compatibility with these circuits; NMOS has a high compatibility in integrated circuits, a wide range of applications, and higher integration and reliability.

[0031] It should be noted that the bridge rectifier, also called a rectifier bridge stack, is the most commonly used circuit that uses the unidirectional conductivity of a diode for rectification, and is often used to convert alternating current into direct current. A bridge rectifier is composed of four diodes connected in a closed-loop "bridge" configuration to produce the desired output, which is equivalent to the fifth diode D5, the sixth diode D6, the seventh diode D7 and the eighth diode D8 in a preferred embodiment of the present application. The main advantage of this bridge rectifier circuit is that it does not require a special center-tapped transformer, thereby reducing size and cost. It should be particularly pointed out that diodes, as rectifying elements, should be selected according to different rectification methods and load sizes. If the selection is inappropriate, it may not work safely or even burn the tube; or it may be overkill, resulting in waste.

[0032] Specifically, the live wire terminal (L) of the connector module 10 is connected to the anode of the fifth diode D5 and the cathode of the eighth diode D8, the cathode of the fifth diode D5 is connected to one end of the first capacitor C1, the anode of the eighth diode D8 is connected to the other end of the first capacitor C1, and the neutral wire terminal N of the connector module 10 is connected to the anode of the sixth diode D6 and the cathode of the seventh diode D7.

[0033] Specifically, one end of the first capacitor C1 is connected to one end of the three-winding transformer TWT, the other end of the first capacitor C1 is connected to the gate G of the MOS tube, the other end of the three-winding transformer TWT is connected to the drain D of the MOS tube, and the source S of the MOS tube is grounded.

[0034] It should be noted that each phase of the three-winding transformer has three windings. When one winding is connected to an AC power source, the other two windings induce different potentials. This transformer is used for loads that require two different voltage levels. Power plants and substations usually have three different levels of voltage, so three-winding transformers are widely used in power systems. The high, medium and low voltage windings of each phase are all sleeved on the same core column. In order to ensure reasonable insulation, the high-voltage winding is usually placed on the outermost layer, and the medium-voltage and low-voltage windings are placed on the inner layer. In a preferred embodiment, a three-winding transformer TWT can be used to connect three transmission systems with different voltages with one three-winding transformer, which is more economical than using two ordinary transformers, takes up less space, and is more convenient to maintain and manage.

[0035] Specifically, one end of the three-winding transformer TWT is connected to the positive electrode of the first diode, the other end of the three-winding transformer TWT is connected to the positive electrode of the second diode D2, the negative electrode of the first diode and the negative electrode of the second diode D2 are connected to one end of the first resistor R1, the other end of the first resistor R1 is connected to one end of the second capacitor C2, and the positive electrode of the second diode D2 is connected to the other end of the second capacitor C2.

[0036] Specifically, one end of the second capacitor C2 connected to the first resistor R1 is connected to the positive electrode V+ of the power supply, and one end of the second capacitor C2 connected to the positive electrode of the second diode D2 is connected to the negative electrode V- of the power supply.

[0037] Specifically, one end of the three-winding transformer TWT is connected to the positive electrode of the third diode D3, the other end of the three-winding transformer TWT is connected to the positive electrode of the fourth diode D4, the negative electrode of the third diode D3 and the negative electrode of the fourth diode D4 are connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to one end of the third capacitor C3, and the positive electrode of the third diode D3 is connected to the other end of the third capacitor C3.

[0038] Specifically, one end of the third capacitor C3 connected to the second resistor R2 is connected to the positive electrode V+ of the power supply, and one end of the third capacitor C3 connected to the positive electrode of the third diode D3 is connected to the negative electrode V- of the power supply.

[0039] Specifically, the other end of the positive electrode V+ of the power supply is connected to the two LED lamps.

[0040] For other structures of the LED lamp safety protection device described in this embodiment, refer to the prior art.

[0041] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A LED lamp safety protection device, characterized in that: include: A connector module (10), the connector module (10) comprising a first connector and a first connection terminal; A protection circuit module (20), the protection circuit module (20) comprising a bridge rectifier, a first capacitor (C1), a second capacitor (C2), a third capacitor (C3), a three-winding transformer (TWT), a MOS tube, a first diode (D1), a second diode (D2), a third diode (D3), a fourth diode (D4), a first resistor (R1) and a second resistor (R2); An LED lamp assembly module (30), the LED lamp assembly module (30) comprising a second connector, a second connection terminal and two LED lamps; The bridge rectifier comprises a fifth diode (D5), a sixth diode (D6), a seventh diode (D7) and an eighth diode (D8); the connector module (10) is connected to one end of the protection circuit module (20); and the LED lamp assembly module (30) is connected to the other end of the protection circuit module (20).

2. The LED lamp safety protection device according to claim 1, characterized in that: The live wire terminal (L) of the connector module (10) is connected to the positive electrode of the fifth diode (D5) and the negative electrode of the eighth diode (D8), the negative electrode of the fifth diode (D5) is connected to one end of the first capacitor (C1), the positive electrode of the eighth diode (D8) is connected to the other end of the first capacitor (C1), and the neutral wire terminal (N) of the connector module (10) is connected to the positive electrode of the sixth diode (D6) and the negative electrode of the seventh diode (D7).

3. The LED lamp safety protection device according to claim 2, characterized in that: One end of the first capacitor (C1) is connected to one end of the three-winding transformer (TWT), the other end of the first capacitor (C1) is connected to the gate (G) of the MOS tube, the other end of the three-winding transformer (TWT) is connected to the drain (D) of the MOS tube, and the source (S) of the MOS tube is grounded.

4. The LED lamp safety protection device according to claim 3, characterized in that: One end of the three-winding transformer (TWT) is connected to the positive electrode of the first diode, the other end of the three-winding transformer (TWT) is connected to the positive electrode of the second diode (D2), the negative electrode of the first diode and the negative electrode of the second diode (D2) are connected to one end of the first resistor (R1), the other end of the first resistor (R1) is connected to one end of the second capacitor (C2), and the positive electrode of the second diode (D2) is connected to the other end of the second capacitor (C2).

5. The LED lamp safety protection device according to claim 4, characterized in that: One end of the second capacitor (C2) connected to the first resistor (R1) is connected to the positive electrode (V+) of the power supply, and one end of the second capacitor (C2) connected to the positive electrode of the second diode (D2) is connected to the negative electrode (V-) of the power supply.

6. The LED lamp safety protection device according to claim 5, characterized in that: One end of the three-winding transformer (TWT) is connected to the positive electrode of the third diode (D3), the other end of the three-winding transformer (TWT) is connected to the positive electrode of the fourth diode (D4), the negative electrode of the third diode (D3) and the negative electrode of the fourth diode (D4) are connected to one end of the second resistor (R2), the other end of the second resistor (R2) is connected to one end of the third capacitor (C3), and the positive electrode of the third diode (D3) is connected to the other end of the third capacitor (C3).

7. The LED lamp safety protection device according to claim 6, characterized in that: One end of the third capacitor (C3) connected to the second resistor (R2) is connected to the positive electrode (V+) of the power supply, and one end of the third capacitor (C3) connected to the positive electrode of the third diode (D3) is connected to the negative electrode (V-) of the power supply.

8. The LED lamp safety protection device according to claim 7, characterized in that: The other end of the positive electrode (V+) of the power supply is connected to the two LED lamps.

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