TWM566962U - Photo-controlled driving circuit for high voltage utility power - Google Patents

Abstract

This disclosure is related to a photo-controlled driving circuit for high voltage utility power, which is used for working conditions of high voltage and high current of the utility power and the big surge of the utility power. The photo-controlled driving circuit comprises a photo-controlled switch circuit, a SCR photo-controlled driver and a main converter. The photo-controlled switch circuit includes a set of photo-controlled transisters (U1 and U2) and a first swiching transister Q1. The SCR photo-controlled driver includes a second switching transister Q2 and a third switching transister Q3 that coupled with a plurality of diodes D1~D4. The second switching transister Q2 and the third switching transister Q3 are coupled to the main converter. This disclosure provides a light control type driving circuit which can effectively achieve the ability of adjusting the driving current according to the voltage level of the utility power and further realize the topological structure resistant to the high voltage impact of the utility power to improve the overall efficiency of the circuit. In particular, this disclosure is applied to a high-power DC converter using a silicon controlled rectifier (SCR) as a switching device to improve its operating efficiency under the light load situation.

Description

Mains high voltage light control type driving circuit

The present invention relates to a commercial high-voltage light-controlled driving circuit, in particular to a field of a light-controlled driving circuit which is applied to a high-voltage and large-current in a general commercial power supply and a severe operation of a commercial power surge.

In the field of power electronics, SCR (Silicon-Controlled Rectifier) is often used to control the switch of the mains. However, the control signal has the same problem as the power-controlled rectifier (SCR), which leads to the drive-controlled rectifier (SCR) drive. The circuit needs to be isolated. At present, the isolation scheme adopted by the general industry usually adopts the strategies of transformer isolation type and light control isolation type. However, the traditional transformer-isolated drive line has defects such as high drive loss and poor pulse drive, especially the pulse drive will cause the impedance characteristic between the cathode/anode (AK) pole of the controlled rectifier (SCR). Pulse changes. In this way, in the case of high-current operation of the mains, the loss of the main control rectifier (SCR) body due to the impedance will increase significantly, which will reduce the efficiency of the device.

Based on the higher efficiency requirements of the device, the light-controlled isolated driving method has been proposed and widely used. However, the power supply device is limited by the high power density and the package, and the commonly used light-controlled sluice fluid element can withstand a maximum voltage of 800V. Therefore, the high voltage shock resistance and the shock surge problem of the light control sluice fluid have always been the design bottleneck. Therefore, it is necessary to propose a circuit topology capable of adjusting the driving current capacity according to the mains voltage, and at the same time realizing the high voltage and surge shock resistance against the mains, so as to improve the overall efficiency of the circuit.

The technical problem to be solved by the present invention is that the main control rectifier circuit (SCR) transformer isolation drive circuit existing in the above-mentioned existing topology circuit structure has large loss, the drive current is discontinuous, and the SCR has excessive body loss. The defect provides a high-voltage and high-current controlled-controlled rectifier (SCR) optically controlled isolation drive circuit with high efficiency and fast dynamic response.

The commercial high-voltage light-controlled driving circuit described in the present invention is used for working conditions of high-voltage high-current and commercial power surge of the utility power, and the high-voltage optical control driving circuit of the utility power comprises: a light-controlled switching circuit including a light control a thyristor assembly and a first switching element Q1, wherein the light control switch circuit is input with a driving switch signal; the optical thyristor fluid component is connected in series with the first switching element Q1, and the optical thyristor fluid component has at least four a controllable rectifier light control driving circuit, the input has a mains power supply, and is coupled to the light control switch circuit, the controllable rectifier light control drive circuit comprises: a second controlled voltage controlled rectifier switching element Q2; a third controlled step-controlled rectifier switching element Q3, the cathode end of the third controlled step-controlled rectifier switching element Q3 is coupled to the anode terminal of the second controlled step-controlled rectifier switching element Q2 and coupled to the mains power supply a first diode D1, the cathode end of the first diode D1 is coupled to the gate terminal of the second controlled step-controlled rectifier switching element Q2, and the anode terminal of the first diode D1 is coupled to The light control gate a third end of the body assembly; a second diode D2, the cathode end of the second diode D2 is coupled to the gate terminal of the third controlled step-controlled rectifier switching element Q3, the second diode D2 The anode end is coupled to the anode end of the first diode D1; a third diode D3, the cathode end of the third diode D3 is coupled to the second controlled step-controlled rectifier switching element Q2 An anode end of the third diode D3 is coupled to the fourth end of the light control fluid assembly; and a fourth diode D4, the cathode end of the fourth diode D4 is coupled to the anode terminal The anode end of the third diode D4 is coupled to the anode end of the third diode D3; a main circuit coupled to the control rectifier light a control circuit, the main circuit is provided with an A terminal, a B terminal and a mains ground; the A terminal of the main circuit is coupled to the cathode end of the second controlled rectifier switching element Q2, and the main circuit B The end is coupled to the anode end of the third controlled step-controlled rectifier switching element Q3; and a voltage stabilizing circuit coupled to the main circuit to regulate the output voltage of the main circuit to make the output of the main circuit The voltage can be stabilized.

10‧‧‧Light switch circuit

12‧‧‧Light control sluice fluid components

20‧‧‧Controlled rectifier light control drive circuit

30‧‧‧Main circuit

40‧‧‧Variable circuit

31‧‧‧First DC-DC Converter

32‧‧‧Second DC-DC converter

U1‧‧‧First light control fluid

U2‧‧‧Second light control fluid

Q1‧‧‧First switching element

Q2‧‧‧Second controlled voltage controlled rectifier switching element

Q3‧‧‧ Third controlled voltage controlled rectifier switching element

Q4‧‧‧fourth switching element

Q5‧‧‧ fifth switching element

SCRIO‧‧‧ drive switch signal

VCC‧‧‧DC power supply

GNDS‧‧‧DC power supply VCC ground wire

D1~D6‧‧‧first to sixth diode

R1~R2‧‧‧first and second resistors

R3~R4‧‧‧ Third and fourth voltage equalizing resistors

R5~R8‧‧‧ fifth to eighth resistor

C1~C7‧‧‧first to seventh capacitor

ZD1‧‧‧ voltage regulator

L1~L2‧‧‧first to second inductor

A‧‧‧A

B‧‧‧B end

1 is a schematic diagram of a circuit module connection according to an embodiment of the present invention; FIG. 2 is a schematic diagram of connection of various circuit components in the present embodiment; FIG. 3 is a schematic diagram of a positive half-cycle embodiment of the present embodiment; A schematic diagram of a negative half cycle embodiment.

The exemplary embodiments are described more fully hereinafter with reference to the accompanying drawings However, the novel concept may be embodied in many different forms and should not be construed as being limited to the illustrative embodiments set forth herein. Rather, these exemplary embodiments are provided so that this description will be thorough and complete, and the scope of the inventive concept will be fully conveyed by those skilled in the art. In the figures, the corresponding positions of the circuit blocks and the circuit elements and the various devices may be exaggerated for clarity, and similar elements are always indicated for similar reference numerals or numerals.

It should be understood that although the term switching element may be used herein to include a switching element, it refers to a term of a switching element, but is not limited to the use of IGBT, BJT, MOS, CMOS, JFET or MOSFET, ie, such elements It should not be limited by the actual product terminology of such electronic components. And the first, second, third... appearing herein; or the first switching element Q1, the fourth switching element Q4; or the first capacitor C1, the second capacitor C2; or the first diode D1 , the second diode D2; ..., these terms are used to clearly distinguish one component from another component, not a certain order of the components, that is, there may be a first switching component, fourth The switching element without the implementation of the second switching element does not necessarily have a continuous serial number as the labeling relationship of the component symbol.

As used herein, the terms first, second, upper or lower, left or right, left or right, primary or secondary, etc., are used to clearly distinguish one element. An endpoint is different from another endpoint of the component, or between an element and another element, or between an endpoint and another endpoint, and is not intended to limit the order in which the character number is presented. Relationship or positional relationship, and not necessarily a numerically continuous relationship. Also, the term "and/or" may be used to include any of the associated listed items and all combinations of one or more. Furthermore, the terms "plural" or "at least two" may be used herein to describe a plurality of elements, but such plural elements or at least two elements are not limited to implementations having two, three or four And more than four component numbers represent the techniques implemented.

The utility model discloses a utility high-voltage light-controlled driving circuit, which is used for high-voltage and high-current of a commercial power and a working condition of a commercial power surge, and provides a high-voltage and high-current with high efficiency and fast dynamic response, and is suitable for a commercial power supply. A circuit component composition and connection relationship of a light-controlled isolation driving circuit of a controlled-controlled rectifier (SCR) effectively improves the loss of the prior art voltage-controlled rectifier (SCR) transformer isolation driving circuit and the discontinuity of the driving current The fault of the main control rectifier (SCR) body is too large.

FIG. 1 discloses a new high-voltage optical control driving circuit of the utility model, which comprises a light control switch circuit 10, a controlled rectifier light control driving circuit 20, a main circuit 30 and a voltage stabilizing circuit 40. The main circuit 30 is referred to as a converter. The light control switch circuit 10 is input with a drive switch signal SCRIO, and the switch operation of the light control switch circuit 10 is performed by the drive switch signal SCRIO. The controllable rectifier light control driving circuit 20 is coupled to the light control switch circuit 10, and is controlled by the switching action of the light control switch circuit 10, and is input with a commercial power supply. The output of the controllable rectifier optical control circuit 20 is coupled to the main circuit 30, which is used to control the main circuit 30 for further power converters.

The voltage stabilizing circuit 40 is coupled to the main circuit 30, and regulates the output voltage of the main circuit 30 so that the output voltage of the main circuit 30 can be stably outputted. Not affected by changes in input voltage or changes in input current. In actual circuit operation, the actual implementation of the voltage stabilizing circuit 40 may be by an electronic voltage regulator, for example, one or more resistor elements connected in series with one or more diode elements connected in series. Or a diode component and a series of different passive components; this is only an embodiment, the actual application of the present invention is not limited thereto.

For further explanation, please refer to FIG. 2, wherein the light control switch circuit 10 includes a light control sluice fluid assembly 12 and a first switching element Q1; the light control sluice fluid assembly 12 is connected in series with the first switching element Q1. Light control sluice fluid assembly 12 has at least four ends. The light control sluice fluid assembly 12 is composed of at least two light control sluice fluids connected in series, for example, a first light control fluid U1 and a second light control fluid disclosed in FIG. U2 is composed of two serial connections. Furthermore, the first end of the light-control sluice fluid assembly 12 is coupled to the DC power source VCC; the 汲 terminal of the first switching element Q1 is coupled to the second end of the light-control sluice fluid assembly 12, the source of the first switching element Q1 The grounding of the source terminal is connected to the ground (GNDS) of the DC power source VCC, and the gate terminal of the first switching element Q1 is coupled to the driving switch signal SCRIO.

It should be noted that the first light control fluid U1 and the second light control fluid U2 are connected to each of the four ends, as indicated in FIG. 2, and further, the first end of the first light control fluid U1 is The first end of the light control sluice fluid assembly 12; the second end of the second light control sluice fluid U2 is the second end of the light control sluice fluid assembly 12; the third end of the first light control sluice fluid U1 is the light control The third end of the thyristor assembly 12; the fourth end of the second thyristor fluid U2 is the fourth end of the light control sluice fluid assembly 12. Therefore, the first end of the first light control fluid U1 is coupled to the DC power source VCC, the third end of the first light control fluid U1 is coupled to the controllable rectifier light control driving circuit 20; and the second light control The first end of the thyristor U2 is coupled to the second end of the first light control fluid U1; the second end of the second light control fluid U2 is coupled to the 汲 terminal of the first switching element Q1; the second light control The third end of the thyristor fluid U2 is coupled to the fourth end of the first light control fluid U1; the fourth end of the second light control fluid U2 is coupled to the controllable rectifier light control driving circuit 20.

In an embodiment, the light control switch circuit 10 further includes a voltage stabilizing component ZD1, a first capacitor C1, a second resistor R2, and a first resistor R1. The cathode end of the voltage stabilizing component ZD1 is connected to the driving. The first end of the first capacitor C1 is coupled in parallel with the second resistor R2; the first end of the first capacitor C1 (FIG. 2) The upper end of C1 is also coupled to the gate terminal of the first switching element Q1, and the second end of the first capacitor C1 (the lower end of C1 shown in FIG. 2) is coupled to the source terminal of the first switching element Q1. . The driving circuit connection function of driving the switching signal SCRIO is formed by the connection relationship of the voltage stabilizing element ZD1, a first capacitor C1, and a second resistor R2. The two ends of the first resistor R1 are coupled between the DC power source VCC and the first end of the light control sluice fluid assembly 12 (also the first end of the first light control fluid U1), and the first resistor R1 is mainly As a current limiting resistor.

The DC power supply VCC is between +10V and +20V in actual operation. In addition, the drive switch signal SCRIO is a high and low potential signal for controlling the light control fluid assembly 12, which is a pulse signal. The light-controlled switch circuit 10 shown in FIG. 2 is a circuit for controlling a step-controlled rectifier (SCR) switch in a light-controlled manner, but this is only an illustrative embodiment, and the novel control-controlled rectifier The action of the switch is not limited by this.

The controllable rectifier light control driving circuit 20 disclosed in FIG. 2 is input with a commercial power supply, and the remote control light control driving circuit 20 includes a second controlled controlled rectifier switching element Q2 and a third controlled controlled rectifier switching element. Q3 and a first to fourth diode D1~D4. The cathode end of the second controlled step-controlled rectifier switching element Q2 is coupled to the first end of the main circuit 30 (the upper end of the main circuit 30 in FIG. 2), and the cathode end of the third controlled step-controlled rectifier switching element Q3 is coupled. The anode of the second controllable rectifier switching element Q2 is coupled to the mains power supply. The cathode end of the first diode D1 is coupled to the gate terminal of the second controlled step-controlled rectifier switching element Q2, and the anode end of the first diode D1 is coupled to the third end of the optical control fluid assembly 12. The cathode end of the second diode D2 is coupled to the gate terminal of the third controlled step-controlled rectifier switching element Q3, and the second The anode end of the diode D2 is coupled to the anode end of the first diode D1. The cathode end of the third diode D3 is coupled to the anode end of the second controlled step-controlled rectifier switching element Q2, that is, coupled to the mains power supply, and the anode end of the third diode D3 is coupled to the light control. The fourth end of the thyristor assembly 12. The cathode end of the fourth diode D4 is coupled to the anode end of the third controlled step-controlled rectifier switching element Q3, and is coupled to the second end of the main circuit 30 (the lower end of the main circuit 30 in FIG. 2), and fourth The anode end of the diode D4 is coupled to the anode terminal of the third diode D3.

In an embodiment, the controllable rectifier light control driving circuit further includes a second capacitor C2, a third capacitor C3, a seventh resistor R7 and an eighth resistor R8. The second capacitor C2 is connected in parallel with the seventh resistor R7; the first end of the second capacitor C2 (the upper end of C2 shown in FIG. 2) is coupled to the cathode end of the second controlled step-controlled rectifier switching element Q2; The second end of the second capacitor C2 (the lower end of C2 shown in FIG. 2) is coupled to the gate terminal of the second controlled step-controlled rectifier switching element Q2. The third capacitor C3 is connected in parallel with the eighth resistor R8; the first end of the third capacitor C3 (the upper end of C3 shown in FIG. 2) is coupled to the cathode end of the third controlled step-controlled rectifier switching element Q3; The second end of the third capacitor C3 (the lower end of C3 shown in FIG. 2) is coupled to the gate terminal of the third controlled step-controlled rectifier switching element Q3.

In another embodiment, the controllable rectifier light control driving circuit further includes a third voltage equalizing resistor R3, a fourth voltage equalizing resistor R4, a fifth resistor R5, and a sixth resistor R6. The first end of the third voltage equalizing resistor R3 (the upper end of R3 shown in FIG. 2) is coupled to the third end of the light control sluice fluid assembly 12; the second end of the third voltage equalizing resistor R3 (the R3 of FIG. 2) The lower end is coupled to the first end of the fourth voltage equalizing resistor R4 and coupled to a fifth end of the light control fluid assembly 12, and the fifth end of the light control fluid assembly 12 is the light control gate The fourth end of the fluid U1 is connected to the contact end of the third end of the second light control fluid U2. The second end of the fourth voltage equalizing resistor R4 (the lower end of R4 shown in FIG. 2) is coupled to the fourth end of the light control fluid assembly 12. The first end of the fifth resistor R5 (the left end of R5 shown in FIG. 2) is coupled to the gate terminal of the second controlled step-controlled rectifier switching element Q2, and the second end of the fifth resistor R5 (shown in FIG. 2) The right end of R5 is coupled to the first The cathode end of the diode D1. The first end of the sixth resistor R6 (the left end of R6 shown in FIG. 2) is coupled to the gate terminal of the third controlled step-controlled rectifier switching element Q3, and the second end of the sixth resistor R6 (the right end of the R6 shown in FIG. 2) ) is coupled to the cathode end of the second diode D2.

The first to fourth diodes D1 to D4 are rectifier diodes, and the fifth resistor R5, the seventh resistor R7 and the second capacitor C2 are driving lines of the second controlled step-controlled rectifier switching element Q2; The resistor R6, the eighth resistor R8, and the third capacitor C3 are driving lines of the third controlled step-controlled rectifier switching element Q3. The light-controlled thyristor fluid assembly 12 of the present invention may be composed of a single or a plurality of light-control sluice fluids (for example, a first light-control sluice fluid U1 and a second light-control sluice fluid U2) connected in series, which mainly depends on the commercial terminal. The magnitude or voltage level of the voltage value. The first light control sluice fluid U1 is connected in parallel with the third grading resistor R3 and the second thyristor fluid U2 in parallel with the fourth grading resistor R4, which is a voltage that is equally distributed across the light control sluice fluid assembly 12, but The new type is not limited to the above method of dividing the voltage, and the voltage division according to different ratios can also be adopted.

The main circuit 30 of FIG. 2 is coupled to the step-controlled rectifier optical control driving circuit 20. The main circuit 30 is provided with an A terminal (A shown in FIG. 2) and a B terminal (B shown in FIG. 2). a mains grounding end; the A terminal of the main circuit is coupled to the cathode end of the second controlled step-controlled rectifier switching element Q2, and the B terminal of the main circuit is coupled to the third controlled step-controlled rectifier switching element Q3 Anode end. Further, the main circuit 30 includes a first DC-DC converter 31 and a second DC-DC converter 32. The first end of the first DC-DC converter 31 is a main circuit. At the A end of 30, the second end of the first DC-DC converter is the mains ground; the first end of the second DC-DC converter 32 is the B end of the main circuit 30, and the second DC-DC converter The second end of 32 is the mains ground.

The first DC-DC converter 31 includes a first inductor L1, a fourth switching element Q4, a fifth diode D5, a fourth capacitor C4, and a sixth capacitor C6. The first end of the first inductor L1 (the left end of L1 shown in FIG. 2) is coupled to the cathode end of the second controlled step-controlled rectifier switching element Q2; the 汲 terminal of the fourth switching element Q4 is coupled to the first inductor L1 The second end (the right end of L1 shown in Figure 2), the fourth switch element The source terminal of the component Q4 is coupled to the mains ground terminal; the anode terminal of the fifth diode D5 is coupled to the second terminal of the first inductor L1; and the first terminal of the sixth capacitor C6 (the upper end of the C6 shown in FIG. 2) The second end of the sixth capacitor C6 (the lower end of the C6 shown in FIG. 2) is coupled to the mains ground; the first end of the fourth capacitor C4 (Fig. The upper end of C4 is coupled to the first end of the first inductor L1, and the second end of the fourth capacitor C4 (the lower end of C4 shown in FIG. 2) is coupled to the mains ground.

The second DC-DC converter 32 includes a second inductor L2, a fifth switch Q5, a sixth diode D6, a fifth capacitor C5, and a seventh capacitor C7. The first end of the second inductor L2 (the left end of the L2 shown in FIG. 2) is coupled to the anode end of the third controlled step-controlled rectifier switching element Q3; the 汲 terminal of the fifth switching element Q5 is coupled to the mains ground. The source terminal of the fifth switching element Q5 is coupled to the second end of the second inductor L2 (the right end of L2 shown in FIG. 2); the cathode end of the sixth diode D6 is coupled to the second inductor L2. a second end; a first end of the fifth capacitor C5 (the lower end of the C5 shown in FIG. 2) is coupled to the first end of the second inductor L2, and a second end of the fifth capacitor C5 (the upper end of the C5 shown in FIG. 2) The first end of the seventh capacitor C7 (the lower end of C7 shown in FIG. 2) is coupled to the anode end of the sixth diode D6, and the second end of the seventh capacitor C7 ( The upper end of C7 shown in FIG. 2 is coupled to the mains ground.

The main circuit 30 described in the present invention is a high frequency DC-DC converter using a sigma-controlled rectifier (SCR). This is only an embodiment and is not limited to practical use. The circuit topology of the above converter.

3 and FIG. 4 are further circuit operation descriptions of a specific embodiment of the mains power input. However, the operation description of the circuit is only an example of an embodiment, and is not intended to limit the technical solution protected by the present invention. Figure 3 shows the circuit operation of the mains power supply for half a week. When the mains is positive half cycle, its working state is that the mains current flows through the third diode D3, the second light control fluid U2, and the first light control fluid U1. , the first diode D1, the fifth resistor R5 and the seventh resistor R7, and then to the first DC-DC converter 31 in the main circuit 30, when the driving switch signal SCRIO is high, the first light control gate The sluice element of fluid U1 and second photo-control fluid U2 itself is high impedance The mutation is zero impedance, so that the voltage on the seventh resistor R7 rises, so that the second controlled step-controlled rectifier switch Q2 is turned on, so that the anode voltage of the anode (A) cathode (K) drops to the normal conduction voltage drop, and the seventh The voltage drop across resistor R7 is maintained at the steady-state drive voltage of the controlled-controlled rectifier (SCR), while the drive-controlled rectifier (SCR) drive current is provided by the mains, which is in continuous transmission with a low damage rate in the on-state.

When the utility power is negative for half a week, its working state is as shown in FIG. 4, and the commercial current flows through the fourth diode D4, the second light control fluid U2, the first light control fluid U1, the second diode D2, and the first The eight resistor R8 flows into the second DC-DC converter 32. When the drive switch signal SCRIO is at a high potential, the thyristor elements of the first light control fluid U1 and the second light control fluid U2 are themselves mutated by high impedance. Zero impedance, the voltage on the eighth resistor R8 rises, so that the third controlled step-controlled rectifier switching element Q3 is turned on, the anode voltage of the anode cathode (AK) drops to the normal conduction voltage drop, and the voltage drop of the eighth resistor R8 is maintained. In the steady-state drive voltage of the controlled rectifier (SCR), the drive current of the controlled rectifier (SCR) is provided by the mains, which is continuous and has low on-state damage.

The novel adjusts the SCR driving circuit so that the SCR conduction resistance is continuous under the whole working condition, and the overall on-state damage is reduced, so that the SCR has a lower on-state under the full load condition, especially under light load conditions. Damage, thereby improving work efficiency at light loads.

Through the above embodiments of the present invention, it is possible to provide a light-controlled driving circuit that can effectively achieve the ability to adjust the driving current according to the voltage of the commercial power, and at the same time realize a topological structure against the high-voltage impact of the commercial power to improve the overall efficiency of the circuit. In addition, the novel circuit structure is reliable and easy to use, and can be used for improving the efficiency of the DC converter, in particular, it can be applied to a high-power DC converter using a controlled-controlled rectifier (SCR) as a switching device to improve its light load. Work efficiency.

In summary, this creation proposes a commercial high-voltage light-controlled drive circuit that can improve the lack of the existing drive-controlled rectifier (SCR) drive circuit, effectively achieving the purpose of providing high-efficiency use of the converter. In addition, the technical effect of resisting high-voltage impact of the mains can be further realized, and the lack of existing technology can be effectively improved. Please request the patent.

However, the description of the present invention is merely illustrative of the preferred embodiments, and the scope of protection of the present invention is not limited thereto, and any local variation, modification or addition of the technology does not depart from the scope of protection of the present invention. in.

Claims (10)

The utility model relates to a utility electric high-voltage optical control driving circuit, which is used for working conditions of a commercial high voltage and a large current and a commercial power surge. The utility high-voltage optical control driving circuit comprises: a light control switching circuit comprising a light control sluice fluid component and a first switching element Q1, the light control switch circuit is input with a driving switch signal; the light control fluid component is connected in series with the first switching element Q1, the light control fluid component has at least four ends; The control rectifier light control driving circuit has a mains power input and is coupled to the light control switch circuit. The controllable rectifier light control driving circuit comprises: a second controlled voltage controlled rectifier switching element Q2; a third receiving Controlling the rectifier switching element Q3, the cathode end of the third controlled step-controlled rectifier switching element Q3 is coupled to the anode end of the second controlled step-controlled rectifier switching element Q2 and coupled to the mains power supply; a diode D1, the cathode end of the first diode D1 is coupled to the gate terminal of the second controlled step-controlled rectifier switching element Q2, and the anode end of the first diode D1 is coupled to the light control gate Fluid component a third terminal; a second diode D2, the cathode end of the second diode D2 is coupled to the gate terminal of the third controlled step-controlled rectifier switching element Q3, and the anode terminal of the second diode D2 The anode end of the second diode D1 is coupled to the anode end of the second diode D3, and the cathode end of the third diode D3 is coupled to the anode end of the second controlled step-controlled rectifier switching element Q2. The anode end of the third diode D3 is coupled to the fourth end of the light control sluice fluid assembly; and the fourth diode D4 is coupled to the third terminal of the fourth diode D4. Controlling the anode end of the rectifier switching element Q3, the anode end of the fourth diode D4 is coupled to the anode end of the third diode D3; a main circuit coupled to the controllable rectifier light control driving circuit The main circuit is provided with an A terminal, a B terminal and a mains ground; the A terminal of the main circuit is coupled to the cathode end of the second controlled rectifier switching element Q2, the main circuit The B terminal is coupled to the anode end of the third controlled step-controlled rectifier switching element Q3; and a voltage stabilizing circuit coupled to the main circuit is configured to regulate the output voltage of the main circuit to make the main circuit The output voltage can be stabilized. The mains high-voltage optical control driving circuit of claim 1, wherein the controlled-controlled rectifier optical control driving circuit further comprises: a second capacitor C2 and a seventh resistor R7, the second capacitor C2 and The seventh resistor R7 is coupled to the cathode; the first end of the second capacitor C2 is coupled to the cathode end of the second controlled step-controlled rectifier switching element Q2; the second end of the second capacitor C2 is coupled to the first The gate terminal of the controlled rectifier rectifier switching element Q2; the controllable rectifier light control driving circuit further includes: a third capacitor C3 and an eighth resistor R8, the third capacitor C3 and the eighth resistor R8 The first end of the third capacitor C3 is coupled to the cathode end of the third controlled step-controlled rectifier switching element Q3; the second end of the third capacitor C3 is coupled to the third controlled step-controlled rectifier The gate terminal of the switching element Q3. The mains high-voltage light-controlled driving circuit according to the first item of claim 1, wherein the controlled-controlled rectifier optical control driving circuit further comprises: a third equalizing resistor R3 and a fourth equalizing resistor R4; The first end of the third grading resistor R3 is coupled to the third end of the thyristor fluid assembly; the second end of the third grading resistor R3 is coupled to the first end of the fourth grading resistor R4 and coupled Connected to a fifth end of the light control sluice fluid assembly; the second end of the fourth grading resistor R4 is coupled to the fourth end of the light control sluice fluid assembly. The mains high-voltage optical control driving circuit of claim 1, wherein the step-controlled rectifier optical control driving circuit further comprises a fifth resistor R5 and a sixth resistor R6; the fifth resistor R5 is first The second end of the fifth resistor R5 is coupled to the cathode end of the first diode D1; the first end of the sixth resistor R6 is coupled to the gate terminal of the second controlled step-controlled rectifier switching element Q2. The terminal is coupled to the gate terminal of the third controlled step-controlled rectifier switching element Q3, and the second terminal of the sixth resistor R6 is coupled to the cathode terminal of the second diode D2. The utility model as claimed in claim 1 , wherein the light control sluice fluid component is composed of at least two light control sluice fluids connected in series, and the first end coupling of the light control sluice fluid component Connected to the DC power supply VCC; the first terminal of the first switching element Q1 is coupled to the second end of the light control fluid assembly, the source terminal of the first switching element Q1 is grounded, and the ground of the source terminal is connected to the DC power supply The ground of the VCC is connected, and the gate terminal of the first switching element Q1 is coupled to the driving switch signal. The utility model as claimed in claim 5, wherein the light control sluice fluid component comprises: a first light control sluice fluid U1, the first end of the first light control sluice fluid U1 The first light control fluid U1 has a third end coupled to the anode end of the first diode D1; and a second light control fluid U2, the second light control fluid The second end of the second light-controlling fluid U2 is coupled to the first end of the first switching element Q1; the second light is coupled to the second end of the first light-controlling fluid U1; The third end of the control fluid U2 is coupled to the fourth end of the first light control fluid U1; the fourth end of the second light control fluid U2 is coupled to the anode end of the fourth diode D4. The utility model as claimed in claim 5, wherein the light control switch circuit further comprises a voltage stabilizing component ZD1 and a first resistor R1, wherein a cathode end of the voltage stabilizing component ZD1 is connected to the driving switch The anode end of the voltage stabilizing element ZD1 is coupled to the gate terminal of the first switching element Q1; the first resistor R1 is coupled between the DC power source VCC and the first end of the light control fluid assembly. The utility model as claimed in claim 7 , wherein the light control switch circuit further comprises a first capacitor C1 and a second resistor R2; the first capacitor C1 and the second resistor R2 are The first end of the first capacitor C1 is coupled to the gate terminal of the first switching element Q1, and the second end of the first capacitor C1 is coupled to the source terminal of the first switching element Q1. The utility model as claimed in claim 1 , wherein the main circuit comprises a first DC-DC converter and a second DC-DC converter, the first DC-DC converter. The first end of the converter is the A end of the main circuit, the second end of the first DC-DC converter is the mains ground; the first end of the second DC-DC converter is the main circuit At the B end, the second end of the second DC-DC converter is the mains ground. The utility model as claimed in claim 9 , wherein in the main circuit, the first DC-DC converter comprises: a first inductor L1, the first end of the first inductor L1 The fourth switching element Q4 is coupled to the second end of the first inductor L1, and the fourth terminal is coupled to the second end of the first inductor L1. The source terminal of the switching element Q4 is coupled to the mains ground; a fifth diode D5, the anode end of the fifth diode D5 is coupled to the second end of the first inductor L1; and a fourth capacitor C4 The first end of the fourth capacitor C4 is coupled to the first end of the first inductor L1, the second end of the fourth capacitor C4 is coupled to the mains ground; and a sixth capacitor C6, the sixth The first end of the capacitor C6 is coupled to the cathode end of the fifth diode D5, and the second end of the sixth capacitor C6 is coupled to the mains ground; the second DC-DC converter includes: a second The first end of the second inductor L2 is coupled to the anode end of the third controlled step-controlled rectifier switching element Q3; a fifth switching element Q5, A fifth switching element Q5 drain terminal coupled to the electrical ground of the city, the source terminal of the fifth switching element Q5 is coupled to the second end of the second inductor L2; a sixth diode D6, the cathode end of the sixth diode D6 is coupled to the second end of the second inductor L2; a fifth capacitor C5, the first end of the fifth capacitor C5 is coupled to the a first end of the second inductor L2, the second end of the fifth capacitor C5 is coupled to the mains ground; and a seventh capacitor C7, the first end of the seventh capacitor C7 is coupled to the sixth pole The anode end of the body D6, the second end of the seventh capacitor C7 is coupled to the mains ground.