Three-phase bridge rectifier circuit based on MOS (Metal Oxide Semiconductor) tube

Abstract

The utility model relates to a three-phase bridge rectifier circuit based on MOS tubes, and belongs to the technical field of rectifier circuits. Comprising an MOS tube U1, an MOS tube U2, an MOS tube U3, an MOS tube U7, an MOS tube U8, an MOS tube U9, a gate driver U4, a gate driver U5, a gate driver U6, an operational amplifier U10, an operational amplifier U11, an operational amplifier U12, a Zener diode D1, a Zener diode D2, a Zener diode D3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C1, a capacitor C2 and a capacitor C3. According to the utility model, positive and negative unknown three-phase input can be converted into positive and negative determined direct current input, so that direct current can be conveniently supplied to an LED chip of an automobile, and automobile lamps can be conveniently driven.

Description

Technical Field

[0001] The utility model belongs to the technical field of rectifier circuits, and in particular relates to a three-phase bridge rectifier circuit based on a MOS tube. Background Art

[0002] With the improvement of national economy and living standards, automobile industry technology is developing rapidly. And with the improvement of light-emitting zener diode technology, it has the advantages of high luminous efficiency, long life, good color rendering effect, etc., so it is widely used in vehicle lighting products. Car lights generally use halogen lamps or LED lamps. Since LED lamps use LED chips, LED chips need to be powered by direct current. If the car outputs alternating current, the alternating current needs to be rectified into direct current before it can be output to the LED chip. Therefore, the car light is designed with a bridge rectifier circuit at the input end, and the alternating current is rectified into direct current through the bridge rectifier circuit. Therefore, the utility model provides a new three-phase bridge rectifier circuit based on MOS tube. Summary of the invention

[0003] In order to overcome the problems mentioned in the background technology, the utility model provides a three-phase bridge rectifier circuit based on MOS tubes. The utility model can convert the three-phase input with unknown positive and negative into a DC input with certain positive and negative, so as to supply DC power to the LED chip of the car and drive the car lights.

[0004] To achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a three-phase bridge rectifier circuit based on a MOS tube includes a MOS tube U1, a MOS tube U2, a MOS tube U3, a MOS tube U7, a MOS tube U8, a MOS tube U9, a gate driver U4, a gate driver U5, a gate driver U6, an operational amplifier U10, an operational amplifier U11, an operational amplifier U12, a Zener diode D1, a Zener diode D2, a Zener diode D3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a capacitor C1, a capacitor C2 and a capacitor C3, the drain of the MOS tube U1, the drain of the MOS tube U2, The drain of MOS tube U3, the OUT pin of gate driver U4, the OUT pin of gate driver U5 and the OUT pin of gate driver U6 are all connected to the power input terminal VCC, the gate of MOS tube U1 is connected to the GATE pin of gate driver U4, the source of MOS tube U1, the IN pin of gate driver U4, one end of resistor R1, the drain of MOS tube U7, the inverting input terminal of operational amplifier U10 and one end of resistor R7 are all connected to the three-phase input terminal A, the other end of resistor R7 is connected to the three-phase input terminal B, the other end of resistor R1 is connected to the VS pin of gate driver U4 and one end of capacitor C1, the other end of capacitor C1 and the GND pin of gate driver U4 are grounded, the gate of MOS tube U7 is connected to resistor One end of resistor R4 is connected to the cathode of the voltage-stabilizing diode D1, the other end of resistor R4 is connected to the output end of the operational amplifier U10, the gate of MOS tube U2 is connected to the GATE pin of the gate driver U5, the source of MOS tube U2, the IN pin of the gate driver U5, one end of resistor R2, the drain of MOS tube U8, the inverting input end of the operational amplifier U11, and one end of resistor R8 are all connected to the three-phase input B end, the other end of resistor R8 is connected to the three-phase input C end, the other end of resistor R2 is connected to the VS pin of the gate driver U5 and one end of capacitor C2, the other end of capacitor C2 and the GND pin of the gate driver U5 are grounded, the gate of MOS tube U8 is connected to one end of resistor R5 and the cathode of the voltage-stabilizing diode D2, and resistor The other end of R5 is connected to the output end of the operational amplifier U11, the gate of the MOS tube U3 is connected to the GATE pin of the gate driver U6, the source of the MOS tube U3, the IN pin of the gate driver U6, one end of the resistor R3, the drain of the MOS tube U9, the inverting input end of the operational amplifier U12, and one end of the resistor R9 are all connected to the three-phase input A end, the other end of the resistor R9 is connected to the three-phase input C end, the other end of the resistor R3 is connected to the VS pin of the gate driver U6 and one end of the capacitor C3, the other end of the capacitor C3 and the GND pin of the gate driver U6 are grounded, the gate of the MOS tube U9 is connected to one end of the resistor R6 and the cathode of the voltage regulator diode D3, and the other end of the resistor R6 is connected to the output end of the operational amplifier U12.The source of MOS tube U7, the anode of Zener diode D1, the non-inverting input terminal of operational amplifier U10, the source of MOS tube U8, the anode of Zener diode D2, the non-inverting input terminal of operational amplifier U11, the source of MOS tube U9, the anode of Zener diode D3 and the non-inverting input terminal of operational amplifier U12 are all grounded.

[0005] Furthermore, the MOS transistor U1 , MOS transistor U2 , MOS transistor U3 , MOS transistor U7 , MOS transistor U8 and MOS transistor U9 are all NMOS transistors.

[0006] Furthermore, the gate driver U4, gate driver U5 and gate driver U6 are all high-side gate drivers MX5050T.

[0007] Furthermore, the resistors R1, R2, R3, R4, R5 and R6 are all current-limiting resistors, and the resistors R7, R8 and R9 are all varistors.

[0008] Beneficial effects of the utility model:

[0009] The circuit of the utility model can convert a three-phase input with unknown positive and negative into a DC input with determined positive and negative. The three-phase inputs A, B, and C only need to contain at least one positive and one negative, which is convenient for supplying DC power to the LED chip of the car and driving the car lights. At the same time, a varistor is connected to prevent the peak voltage on the car from damaging the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to facilitate understanding by technicians.

[0012] like Figure 1The utility model discloses a three-phase bridge rectifier circuit based on MOS tubes, and the three-phase bridge rectifier circuit based on MOS tubes includes MOS tubes U1, MOS tubes U2, MOS tubes U3, MOS tubes U7, MOS tubes U8, MOS tubes U9, gate drivers U4, gate drivers U5, gate drivers U6, operational amplifiers U10, operational amplifiers U11, operational amplifiers U12, and voltage regulator diodes D1. , Zener diode D2, Zener diode D3, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, resistor R7, resistor R8, resistor R9, capacitor C1, capacitor C2 and capacitor C3, the drain of the MOS tube U1, the drain of the MOS tube U2, the drain of the MOS tube U3, the OUT pin of the gate driver U4, the OUT pin of the gate driver U5 and the OUT pin of the gate driver U6 are all connected to the power input terminal VCC, the gate of the MOS tube U1 is connected to the GATE pin of the gate driver U4, the source of the MOS tube U1 and the IN pin of the gate driver U4 , one end of the resistor R1, the drain of the MOS tube U7, the inverting input terminal of the operational amplifier U10, and one end of the resistor R7 are all connected to the three-phase input A terminal, the other end of the resistor R7 is connected to the three-phase input B terminal, the other end of the resistor R1 is connected to the VS foot of the gate driver U4 and one end of the capacitor C1, the other end of the capacitor C1 and the GND foot of the gate driver U4 are grounded, the gate of the MOS tube U7 is connected to one end of the resistor R4 and the cathode of the voltage regulator diode D1, the other end of the resistor R4 is connected to the output terminal of the operational amplifier U10, the gate of the MOS tube U2 is connected to the GATE foot of the gate driver U5, and the MOS tube U The source of 2, the IN pin of the gate driver U5, one end of the resistor R2, the drain of the MOS tube U8, the inverting input terminal of the operational amplifier U11, and one end of the resistor R8 are all connected to the three-phase input terminal B, the other end of the resistor R8 is connected to the three-phase input terminal C, the other end of the resistor R2 is connected to the VS pin of the gate driver U5 and one end of the capacitor C2, the other end of the capacitor C2 and the GND pin of the gate driver U5 are grounded, the gate of the MOS tube U8 is connected to one end of the resistor R5 and the cathode of the voltage regulator diode D2, the other end of the resistor R5 is connected to the output terminal of the operational amplifier U11, the gate of the MOS tube U3 is connected to the gate driver The GATE pin of U6 is connected, the source of MOS tube U3, the IN pin of gate driver U6, one end of resistor R3, the drain of MOS tube U9, the inverting input terminal of operational amplifier U12, and one end of resistor R9 are all connected to the three-phase input terminal A, the other end of resistor R9 is connected to the three-phase input terminal C, the other end of resistor R3 is connected to the VS pin of gate driver U6 and one end of capacitor C3, the other end of capacitor C3 and the GND pin of gate driver U6 are grounded, the gate of MOS tube U9 is connected to one end of resistor R6 and the cathode of voltage regulator diode D3, and the other end of resistor R6 is connected to the output terminal of operational amplifier U12.The source of MOS tube U7, the anode of voltage zener diode D1, the non-inverting input terminal of operational amplifier U10, the source of MOS tube U8, the anode of voltage zener diode D2, the non-inverting input terminal of operational amplifier U11, the source of MOS tube U9, the anode of voltage zener diode D3 and the non-inverting input terminal of operational amplifier U12 are all grounded; the MOS tube U1, MOS tube U2, MOS tube U3, MOS tube U7, MOS tube U8 and MOS tube U9 are all NMOS tubes; the gate driver U4, the gate driver U5 and the gate driver U6 are all high-side gate drivers MX5050T; the resistor R1, the resistor R2, resistor R3, resistor R4, resistor R5 and resistor R6 are all current limiting resistors, resistor R7, resistor R8 and resistor R9 are all varistors; capacitors C1, capacitor C2 and capacitor C3 are filter capacitors; this circuit can convert three-phase input with unknown positive and negative into DC input with certain positive and negative, and the three-phase inputs A, B, and C only need to contain at least one positive and one negative. The connection of varistors can prevent the spike voltage on the car from damaging the circuit. Capacitors C2 and C3 are filter capacitors used to filter out interference signals. Resistors R1, resistor R2, resistor R3, resistor R4, resistor R5 and resistor R6 are all current limiting resistors used to limit current. ,

[0013] Working process:

[0014] The working principle of the utility model is as follows: Figure 1 As shown, assuming that the input is A positive and B negative at a certain moment, first, MOS tube U1 and MOS tube U8 are turned on through the body diode. The body diode has a large conduction voltage drop. After the gate driver U4 and the operational amplifier U11 recognize this voltage drop, they will output a high level, making MOS tube U1 and MOS tube U8 fully turned on. If C is positive when A is positive and B is negative, the body diode of MOS tube U3 will be turned on together with MOS tube U1, and the voltage drop of the body diode will cause the gate driver U6 to output a high level, and then MOS tube U3 will be fully turned on. If C is negative when A is positive and B is negative, the voltage drop of the body diode of MOS tube U9 will cause the operational amplifier U12 to output a high level, and then MOS tube U9 will be fully turned on.

[0015] If A is positive and C is negative, first, MOS tubes U1 and U9 are turned on through the body diodes. The body diodes have a large conduction voltage drop. After the gate driver U4 and the operational amplifier U12 recognize this voltage drop, they will output a high level, making MOS tubes U1 and U9 fully turned on. If B is positive when A is positive and C is negative, the body diode of MOS tube U2 will be turned on together with MOS tube U1. The voltage drop of the body diode makes the gate driver U5 output a high level, and then MOS tube U2 is fully turned on. If B is negative when A is positive and C is negative, the voltage drop of the body diode of MOS tube U8 makes the operational amplifier U11 output a high level, and then U8 is fully turned on; the working principle of any other situation is the same as above.

[0016] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the utility model.

Claims

1. A three-phase bridge rectifier circuit based on MOS tube, characterized in that: The three-phase bridge rectifier circuit based on MOS tube includes MOS tube U1, MOS tube U2, MOS tube U3, MOS tube U7, MOS tube U8, MOS tube U9, gate driver U4, gate driver U5, gate driver U6, operational amplifier U10, operational amplifier U11, operational amplifier U12, Zener diode D1, Zener diode D2, Zener diode D3, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, resistor R7, resistor R8, resistor R9, capacitor C1, capacitor C2 and capacitor C3, the drain of MOS tube U1, the drain of MOS tube U2, the drain of MOS tube U3, gate driver U4 The OUT pin of the gate driver U5 and the OUT pin of the gate driver U6 are all connected to the power input terminal VCC, the gate of the MOS tube U1 is connected to the GATE pin of the gate driver U4, the source of the MOS tube U1, the IN pin of the gate driver U4, one end of the resistor R1, the drain of the MOS tube U7, the inverting input terminal of the operational amplifier U10, and one end of the resistor R7 are all connected to the three-phase input terminal A, the other end of the resistor R7 is connected to the three-phase input terminal B, the other end of the resistor R1 is connected to the VS pin of the gate driver U4 and one end of the capacitor C1, the other end of the capacitor C1 and the GND pin of the gate driver U4 are grounded, the gate of the MOS tube U7 is connected to one end of the resistor R4, and the voltage regulator diode D 1, the other end of the resistor R4 is connected to the output end of the operational amplifier U10, the gate of the MOS tube U2 is connected to the GATE pin of the gate driver U5, the source of the MOS tube U2, the IN pin of the gate driver U5, one end of the resistor R2, the drain of the MOS tube U8, the inverting input end of the operational amplifier U11, and one end of the resistor R8 are all connected to the three-phase input B end, the other end of the resistor R8 is connected to the three-phase input C end, the other end of the resistor R2 is connected to the VS pin of the gate driver U5 and one end of the capacitor C2, the other end of the capacitor C2 and the GND pin of the gate driver U5 are grounded, the gate of the MOS tube U8 is connected to one end of the resistor R5 and the cathode of the voltage regulator diode D2, the other end of the resistor R5 The output end of the operational amplifier U11 is connected, the gate of the MOS tube U3 is connected to the GATE pin of the gate driver U6, the source of the MOS tube U3, the IN pin of the gate driver U6, one end of the resistor R3, the drain of the MOS tube U9, the inverting input end of the operational amplifier U12, and one end of the resistor R9 are all connected to the three-phase input A end, the other end of the resistor R9 is connected to the three-phase input C end, the other end of the resistor R3 is connected to the VS pin of the gate driver U6 and one end of the capacitor C3, the other end of the capacitor C3 and the GND pin of the gate driver U6 are grounded, the gate of the MOS tube U9 is connected to one end of the resistor R6 and the cathode of the voltage-stabilizing diode D3, and the other end of the resistor R6 is connected to the output end of the operational amplifier U12.The source of MOS tube U7, the anode of Zener diode D1, the non-inverting input terminal of operational amplifier U10, the source of MOS tube U8, the anode of Zener diode D2, the non-inverting input terminal of operational amplifier U11, the source of MOS tube U9, the anode of Zener diode D3 and the non-inverting input terminal of operational amplifier U12 are all grounded.

2. The three-phase bridge rectifier circuit based on MOS tube according to claim 1, characterized in that: The MOS transistor U1 , MOS transistor U2 , MOS transistor U3 , MOS transistor U7 , MOS transistor U8 and MOS transistor U9 are all NMOS transistors.

3. The three-phase bridge rectifier circuit based on MOS tube according to claim 1, characterized in that: The gate driver U4, gate driver U5 and gate driver U6 are all high-side gate drivers MX5050T.

4. The three-phase bridge rectifier circuit based on MOS tube according to claim 1, characterized in that: The resistors R1, R2, R3, R4, R5 and R6 are all current limiting resistors, and the resistors R7, R8 and R9 are all varistors.

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