CN110198118A - A kind of auxiliary electric source actuating apparatus and a kind of accessory power supply - Google Patents

Abstract

The invention provides an auxiliary power starting device and an auxiliary power, belonging to the technical field of power control. The starting device includes a starting circuit and a shutdown circuit for controlling the shutdown of the starting circuit; the starting circuit includes a starting sub-module arranged in series, the first input end of the starting sub-module is connected to the control end of the first power tube through a charging branch, And connect the positive terminal of the first power tube through the first connection line, the control terminal of the first power tube and the negative terminal are connected through the first regulator tube, the negative terminal of the first power tube is connected to the first output terminal, and the last promoter The first output terminal of the module is the voltage output terminal; the second input terminal in the shutdown circuit is connected to the control terminal of the second power tube through the second connection line, the negative terminal of the second power tube is grounded, and the positive terminal is connected to the last starter module The control end of the first power tube. The starting device can reduce the energy consumption in the starting process of the auxiliary power supply, and solve the problem that the efficiency of the auxiliary power supply is reduced due to excessive energy consumption.

Description

An auxiliary power starting device and an auxiliary power

technical field

The invention belongs to the technical field of power supply control, and in particular relates to an auxiliary power starting device and an auxiliary power supply.

Background technique

The chained H-bridge cascaded structure is widely used in high-voltage direct current transmission, flexible direct current transmission, high-voltage static reactive power compensation device and high-voltage shore power supply technology. In the chained H-bridge cascaded structure, each IGBT needs a driver and Control the high-voltage auxiliary power supply, the start-up voltage of the auxiliary power supply is sometimes as low as 300V, sometimes as high as 4500V, and the voltage variation range is relatively wide. If the start-up of the auxiliary power supply is realized by connecting the start-up resistor in series with the conventional flyback auxiliary power supply, the resistance value of the start-up resistor is usually relatively large. For example, when the start-up voltage of the auxiliary power supply increases from 300V to 4500V, the loss on the start-up resistor is about To increase by 225 times, this high-power resistor consumes a lot of energy, which in turn leads to a significant reduction in power supply efficiency.

Contents of the invention

The purpose of the present invention is to provide a starting device for auxiliary power supply, which is used to solve the problem that the power supply efficiency is greatly reduced due to the large energy consumption of the starting resistor when the starting resistor is used to start the auxiliary power supply in the prior art; the present invention An auxiliary power supply is also provided to solve the problem in the prior art that the efficiency of the power supply is greatly reduced due to the large energy consumption of the starting resistor when the starting resistor is used to start the auxiliary power supply.

To achieve the above object, the technical solution provided by the invention is:

An auxiliary power starting device, comprising a starting circuit and a shutdown circuit for controlling the turning off of the starting circuit; the starting circuit includes a starting sub-module or at least two starting sub-modules arranged in series; the starting sub-module includes the first An input terminal, a first output terminal and a first power tube, the first input terminal is connected to the control terminal of the first power tube through a charging branch, and the first input terminal is connected to the first power tube through a first connection line A positive terminal of a power tube, the control terminal of the first power tube is connected to the negative terminal of the first power tube through the first regulator tube, and the negative terminal of the first power tube is connected to the first output terminal; In the starting circuit, the first input terminal of the first starting sub-module is used to connect the power supply, the first output terminal of the last starting sub-module is the voltage output terminal of the auxiliary power starting device, and except the last starting In the rest of the starting sub-modules of the sub-modules, the connection point between the charging branch and the control terminal of the first power tube is connected to the first input terminal of the next starting sub-module; The second input terminal of the feedback voltage signal of the power supply, the second input terminal is connected to the control terminal of the second power tube through the second connection line, the negative terminal of the second power tube is grounded, and the second power tube The positive end of the positive end is connected to the control end of the first power tube in the last promoter module.

The auxiliary power start-up device uses a voltage regulator tube to control the start-up of the auxiliary power supply. Since there is no start-up resistor to consume energy during the start-up process of the auxiliary power supply, it can reduce the energy consumption during the start-up process of the auxiliary power supply and solve the problem of auxiliary power supply caused by excessive energy consumption. The problem of reduced power efficiency.

Further, the second connection line is provided with a first resistor and a second resistor in series, the connection point of the first resistor and the second resistor is grounded through the first capacitor, and the control terminal of the second power transistor is connected to the first resistor. The negative ends of the two power tubes are connected through a third resistor; the charging branch is composed of a resistance line and a capacitance line connected in parallel, the resistance line is provided with a fourth resistor in series, and the capacitance line is provided with a second capacitor in series; A fifth resistor is arranged in series on the first connection line.

Setting the first resistor can prevent the current at the control terminal of the second power tube from being too large, setting the first capacitor can keep the voltage at the control terminal of the second power tube stable, and the first resistor, the second resistor, the third resistor and the first capacitor form a delay When the circuit is turned off, the turn-off time of the auxiliary power starting device can be adjusted by adjusting the capacity of the first capacitor. The larger the capacity of the first capacitor is, the longer the turn-off time of the auxiliary power starting device is, and the smaller the capacity of the first capacitor is. The shorter the switch-off time of the starter. Setting the fourth resistor can play a role of current limiting, and setting the second capacitor can play a role of voltage stabilization. Setting the fifth resistor can prevent the device from being damaged due to excessive current in the first connection line.

Further, the control terminal of the first power transistor in the last starting sub-module is connected to the ground through the second voltage regulator tube; the voltage output terminal of the auxiliary power starting device is provided with a diode for preventing current backfeeding.

Setting the second regulator tube can not only ensure the stability of the voltage at the control terminal of the first power tube in the last promoter module, but also prevent its voltage from being too high. The diode is provided to prevent the current from flowing back into the auxiliary power starting device and damaging the devices therein.

An auxiliary power supply, including a power control chip, an auxiliary power supply coil and a starting device, the voltage output terminal of the starting device and the voltage output terminal of the auxiliary power supply coil are connected to the power supply terminal of the power supply control chip, and the starting device It includes a startup circuit and a shutdown circuit for controlling the shutdown of the startup circuit; the startup circuit includes a startup submodule or at least two startup submodules arranged in series; the startup submodule includes a first input terminal, a first output terminal and the first power tube, the first input terminal is connected to the control terminal of the first power tube through the charging branch, and the first input terminal is connected to the positive terminal of the first power tube through the first connection line, The control terminal of the first power tube is connected to the negative terminal of the first power tube through the first regulator tube, and the negative terminal of the first power tube is connected to the first output terminal; in the starting circuit, the first The first input terminal of a starter sub-module is used to connect the power supply, the first output terminal of the last starter sub-module is the voltage output terminal of the starter device, and all the other starter sub-modules except the last starter sub-module , the connection point between the charging branch and the control terminal of the first power tube is connected to the first input terminal of the next starting sub-module; the shutdown circuit includes a second power tube and a second input for receiving the feedback voltage signal of the auxiliary power supply terminal, the second input terminal is connected to the control terminal of the second power tube through the second connection line, the negative terminal of the second power tube is grounded, and the positive terminal of the second power tube is connected to the last startup The control terminal of the first power tube in the sub-module.

The start-up device in the auxiliary power supply uses a voltage regulator tube to control the start-up of the auxiliary power supply. Since there is no start-up resistor to consume energy during the start-up process of the auxiliary power supply, it can reduce the energy consumption during the start-up process of the auxiliary power supply and solve the problem of excessive energy consumption. A problem that results in reduced efficiency of the auxiliary power supply.

Further, the second connection line is provided with a first resistor and a second resistor in series, the connection point of the first resistor and the second resistor is grounded through the first capacitor, and the control terminal of the second power transistor is connected to the first resistor. The negative terminals of the two power tubes are connected through the third resistor.

Setting the first resistor can prevent the current at the control terminal of the second power tube from being too large, setting the first capacitor can keep the voltage at the control terminal of the second power tube stable, and the first resistor, the second resistor, the third resistor and the first capacitor form a delay When the circuit is turned off, the turn-off time of the auxiliary power starting device can be adjusted by adjusting the capacity of the first capacitor. The larger the capacity of the first capacitor is, the longer the turn-off time of the auxiliary power starting device is, and the smaller the capacity of the first capacitor is. The shorter the switch-off time of the starter.

Further, the charging branch is composed of a resistance line and a capacitance line connected in parallel, the resistance line is provided with a fourth resistor in series, and the capacitance line is provided with a second capacitor in series.

Setting the fourth resistor can play a role of current limiting, and setting the second capacitor can play a role of voltage stabilization.

Further, a fifth resistor is arranged in series on the first connection line.

Setting the fifth resistor can prevent the device from being damaged due to excessive current in the first connection line.

Further, the control terminal of the first power transistor in the last promoter module is connected to the ground through the second voltage regulator transistor.

Setting the second regulator tube can not only ensure the stability of the voltage at the control terminal of the first power tube in the last promoter module, but also prevent its voltage from being too high.

Further, the voltage output terminal of the starting device is provided with a diode for preventing current backfeeding.

The diode is provided to prevent the current from flowing back into the starting device and damaging the devices therein.

Description of drawings

Fig. 1 is the structural principle diagram of auxiliary power starting device in the device embodiment of the present invention;

2 is a voltage waveform diagram between the negative terminal of the third power transistor Q3, the control terminal and the voltage between the control terminal and the negative terminal during the start-up process of the auxiliary power supply when the input voltage is 300V in the embodiment of the device of the present invention;

3 is a voltage waveform diagram of the control terminal of the fourth power transistor Q4 during the shutdown process of the starting circuit when the input voltage is 300V in the embodiment of the device of the present invention, and the voltage waveform between the negative terminal of the third power transistor Q3, the control terminal, and the control terminal and the negative terminal. voltage waveform;

Fig. 4 is a voltage waveform diagram between the negative terminal of the third power transistor Q3, the control terminal and the voltage between the control terminal and the negative terminal during the start-up process of the auxiliary power supply when the input voltage is 5000V in the embodiment of the device of the present invention;

5 is a voltage waveform diagram of the control terminal of the fourth power transistor Q4 during the shutdown process of the starting circuit when the input voltage is 5000V in the embodiment of the device of the present invention, and the voltage waveform between the negative terminal of the third power transistor Q3, the control terminal, and the control terminal and the negative terminal. voltage waveform;

Fig. 6 is a schematic structural diagram of the auxiliary power supply provided in the embodiment of the present invention.

Detailed ways

The technical solution of the present invention will be further described below in conjunction with specific embodiments.

Device example:

This embodiment provides a starting device for an auxiliary power supply, which is used to control the start-up of the auxiliary power supply in a cascaded chain H-bridge structure, and solves the problem of large energy consumption due to the start-up resistor when the start-up resistor is used to start the auxiliary power supply in the prior art. And lead to the problem that the power supply efficiency is greatly reduced.

The structure and schematic diagram of the starting device for auxiliary power provided in this embodiment is shown in FIG. 1 , which includes a starting circuit and a shutdown circuit, and the shutdown circuit is used to control the shutdown of the startup circuit.

In the starting device for auxiliary power provided in this embodiment, the starting circuit includes at least two starting sub-modules arranged in series. In this embodiment, three starting sub-modules arranged in series in the starting circuit are taken as an example for illustration.

The first starter module includes a first output terminal, a first charging branch, a first input terminal and a first power transistor Q1, and the second starter module includes a second output terminal, a second charging branch, a second input terminal and The second power transistor Q2 and the third starting sub-module include a third output terminal, a third charging branch, a third input terminal and a third power transistor Q3.

In the first starting sub-module, the first input terminal is connected to the positive terminal of the first power transistor Q1 through the first connection line, and is connected to the control terminal of the first power transistor Q1 through the first charging branch; The terminal is connected to the first output terminal of the first promoter module, and the control terminal and the negative terminal of the first power transistor Q1 are connected through the first regulator tube D1. The first connecting line is provided with a first resistor R1 in series, and the first charging branch includes a first resistance line and a first capacitance line, and the first resistance line and the first capacitance line are arranged in parallel, wherein the first resistance line A second resistor R2 is arranged in series, and a first capacitor C1 is arranged in series in the first capacitor circuit.

In the second starting sub-module, the second input terminal is connected to the positive terminal of the second power transistor Q2 through the second connection line, and is connected to the control terminal of the second power transistor Q2 through the second charging branch; the negative terminal of the second power transistor Q2 The terminal is connected to the second output terminal of the second promoter module, and the control terminal and the negative terminal of the second power transistor Q2 are connected through the second regulator tube D2. A third resistor R3 is arranged in series in the second connecting line, and the second charging branch includes a second resistance line and a second capacitance line, and the second resistance line and the second capacitance line are arranged in parallel, wherein the second resistance line A fourth resistor R4 is arranged in series, and a second capacitor C2 is arranged in series in the second capacitor line.

In the third starting sub-module, the third input terminal is connected to the positive terminal of the third power transistor Q3 through the third connection line, and is connected to the control terminal of the third power transistor Q3 through the third charging branch; the negative terminal of the third power transistor Q3 The terminal is connected to the third output terminal of the third promoter module, and the control terminal and the negative terminal of the third power transistor Q3 are connected through the third regulator tube D3. A fifth resistor R5 is arranged in series in the third connection line, and the third charging branch includes a third resistance line and a third capacitance line, and the third resistance line and the third resistance line are arranged in parallel, wherein the third resistance line A sixth resistor R6 is arranged in series, and a third capacitor C3 is arranged in series in the third capacitor circuit.

The first input terminal in the first starting submodule is used to connect the power supply VDC, the first output terminal is connected to the second input terminal in the second starting submodule, and the first charging branch in the first starting submodule is connected to the first The connection point of the control end of the power transistor Q1 is connected to the second input terminal of the second promoter module; the second output terminal in the second promoter module is connected to the third input terminal in the third promoter module, and the second promoter module The connection point between the second charging branch and the control end of the second power transistor Q2 is connected to the third input terminal of the third starting sub-module; the third output terminal in the third starting sub-module is the voltage output terminal of the auxiliary power starting device, It is used to output the voltage for controlling the starting of the auxiliary power supply, and an anti-reverse diode D0 is provided on the line connecting the third output end of the third starting sub-module to the voltage output end of the auxiliary power starting device, and the anti-reverse diode D0 is used to prevent current backfeeding .

The shutdown circuit includes a fourth input terminal, a fourth connection line and a fourth power tube Q4, wherein the fourth input terminal is used to receive the feedback voltage signal of the auxiliary power supply, and the fourth input terminal is connected to the fourth power tube Q4 through the fourth connection line The control terminal of Q4, the positive terminal of the fourth power tube Q4 is connected to the control terminal of the third power tube Q3 in the third promoter module, the negative terminal is grounded, and the fourth power tube Q4 is provided between the positive terminal and the negative terminal. Four regulator tubes D4. The fourth connection line includes the seventh resistor R7 and the eighth resistor R8 arranged in series, and the connection point of the seventh resistor R7 and the eighth resistor R8 is grounded through the fourth capacitor C4, and the control terminal of the fourth power transistor Q4 is connected through the ninth Resistor R9 is grounded.

In the auxiliary power starting device provided in this embodiment, the first power tube Q1, the second power tube Q2 and the third power tube Q3 are silicon carbide MOSFETs of the model C2M1000170D, and the fourth power tube Q4 is of the model irlml0060trpbf Low-voltage MOSFET; the voltage regulation of the first voltage regulator D1, the second voltage regulator D2 and the third voltage regulator D3 is 22V, and the voltage regulation of the fourth voltage regulator D4 is 25V.

The working principle of the auxiliary power starting device provided in this embodiment is:

After the voltage is applied by the power supply VDC, the junction capacitance of the third power transistor Q3 is charged through the first charging branch, the second charging branch and the third charging branch;

When the voltage across the junction capacitance of the third power transistor Q3 is less than its conduction threshold, the first power transistor Q1, the second power transistor Q2 and the third power transistor Q3 are all in an off state;

When the voltage across the junction capacitance of the third power transistor Q3 is greater than its conduction threshold, the third power transistor Q3 is turned on;

After the third power transistor Q3 is turned on, the power supply VDC charges the junction capacitance of the second power transistor Q2 through the first charging branch and the second charging branch;

When the voltage across the junction capacitance of the second power transistor Q2 is less than its conduction threshold, both the first power transistor Q1 and the second power transistor Q2 are in an off state;

When the voltage across the junction capacitance of the second power transistor Q2 is greater than its conduction threshold, the second power transistor Q2 is turned on;

After the second power transistor Q2 is turned on, the power supply VDC charges the junction capacitance of the first power transistor Q1 through the first charging branch;

When the voltage across the junction capacitance of the first power transistor Q1 is less than its conduction threshold, the first power transistor Q1 is in an off state;

When the voltage across the junction capacitance of the first power transistor Q1 is greater than its conduction threshold, the first power transistor Q1 is turned on;

The voltage at the control terminal of the first power transistor Q1 is clamped at 22V under the action of the first regulator tube D1, and the voltage at the control terminal of the second power tube Q2 is clamped at 22V under the action of the second regulator tube D2. Under the action of the three regulator tubes D3, the voltage at the control terminal of the third power tube Q3 is clamped at 22V, so that the power supply VDC can pass through the first resistor R1, the first power tube Q1, the third resistor R3, and the second power tube Q2 , the fifth resistor R5, the third power transistor Q3 and the anti-reverse diode D0 output voltage from the voltage output terminal to the auxiliary power supply;

When the output voltage of the voltage output terminal is lower than the starting voltage of the auxiliary power supply, the auxiliary power supply does not start; when the output voltage of the voltage output terminal is higher than the starting voltage of the auxiliary power supply, the auxiliary power supply starts and the auxiliary power supply begins to work.

When the auxiliary power supply starts to work, the fourth input terminal receives the feedback voltage signal of the auxiliary power supply;

The auxiliary power supply feedback voltage signal received by the fourth input terminal charges the fourth capacitor C4 through the seventh resistor R7, and charges the junction capacitance of the fourth power transistor Q4 through the eighth resistor R8;

When the voltage at the control terminal of the fourth power transistor Q4 exceeds its conduction threshold, the fourth power transistor Q4 is turned on, and the voltage at the control terminal of the third power transistor Q3 decreases; when the voltage at the control terminal of the third power transistor Q3 is lower than its conduction threshold , the third power transistor Q3 is turned off;

After the third power transistor Q3 is turned off, the voltage at the control terminal of the second power transistor Q2 decreases; when the voltage at the control terminal of the second power transistor Q2 is lower than its conduction threshold, the second power transistor Q2 is turned off;

After the second power transistor Q2 is turned off, the voltage at the control terminal of the first power transistor Q1 decreases; when the voltage at the control terminal of the first power transistor Q1 is lower than its conduction threshold, the first power transistor Q1 is turned off, the starting circuit stops working, and the auxiliary The power starter also stopped working.

When the starting circuit stops working, the power supply of the power control chip of the auxiliary power supply is completely provided by the auxiliary power supply coil of the auxiliary power supply, and the auxiliary power supply continues to work.

In the process of controlling the starting device of the auxiliary power supply to start and stop working, the loss of the whole starting device of the auxiliary power supply is very small, which can improve the working efficiency of the auxiliary power supply.

When the input voltage is 300V, the voltage waveforms at each terminal of the third power transistor Q3 during the starting process of the auxiliary power supply are shown in Figure 2. In Figure 2, the waveforms from top to bottom are the third power transistor Q3 during the starting process of the auxiliary power supply. The voltage waveform at the negative terminal, the voltage waveform at the control terminal, and the voltage waveform between the control terminal and the negative terminal. After the start-up of the auxiliary power supply is completed, the voltage waveforms at the control terminal of the fourth power transistor Q4 and the voltage waveforms at the terminals of the third power transistor Q3 during the shutdown process of the start-up circuit are shown in Figure 3. In Figure 3, the waveforms from top to bottom are the start-up The voltage waveform at the control terminal of the fourth power transistor Q4, the voltage waveform at the negative terminal of the third power transistor Q3, the voltage waveform at the control terminal of the third power transistor Q3, and the voltage waveform between the control terminal and the negative terminal of the third power transistor Q3 during circuit shutdown .

When the input voltage is 5000V, the voltage waveforms at each end of the third power transistor Q3 during the start-up of the auxiliary power supply are shown in Figure 4. In Figure 4, the waveforms from top to bottom are the third power transistor Q3 during the start-up of the auxiliary power The voltage waveform at the negative terminal, the voltage waveform at the control terminal, and the voltage waveform between the control terminal and the negative terminal. After the start-up of the auxiliary power supply is completed, the voltage waveforms at the control terminal of the fourth power transistor Q4 and the voltage waveforms at the terminals of the third power transistor Q3 during the shutdown process of the start-up circuit are shown in Figure 5. In Figure 5, the waveforms from top to bottom are the start-up The voltage waveform at the control terminal of the fourth power transistor Q4, the voltage waveform at the negative terminal of the third power transistor Q3, the voltage waveform at the control terminal of the third power transistor Q3, and the voltage waveform between the control terminal and the negative terminal of the third power transistor Q3 during circuit shutdown .

In the starting device of the auxiliary power supply provided in this embodiment, three starter sub-modules are arranged in series in the starting circuit; as other implementation manners, the number of starter sub-modules arranged in series in the starting circuit can be determined according to the voltage level of the auxiliary power supply. When only one starter module is set in the startup circuit, the starter module is both the first starter module and the last starter module. At this time, the input terminal of the starter module is connected to the power supply VDC, and the output terminal is the auxiliary power supply. The voltage output terminal of the starting device, the control terminal of the power transistor in the starting sub-module is connected to the positive terminal of the fourth power transistor Q4 in the shutdown circuit.

As another implementation manner, anti-reverse diodes may not be provided at the voltage output terminals.

In this embodiment, the fourth voltage regulator tube D4 is set, which can ensure the stability of the voltage at the control terminal of the third power tube Q3 and prevent its voltage from being too high; as other implementation modes, the fourth voltage regulator tube D4 can use other voltage regulators It can be replaced by a voltage device or a voltage stabilizing circuit, or not provided.

In this embodiment, a first resistor R1 is arranged in series in the first connecting line, a third resistor R3 is arranged in series in the second connecting line, a fifth resistor R5 is arranged in series in the third connecting line, the first resistor R1, the second The three resistors R3 and the fifth resistor R5 play a role of current limiting, so as other implementations, multiple resistors can be connected in series in the first connection line, the second connection line and the third connection line, or only in the first connection line, the second connection line A resistor with a larger resistance value is set in one of the second connection line and the third connection line.

In this embodiment, the seventh resistor R7 in the fourth connecting line acts as a current limiter, the eighth resistor R8 and the ninth resistor R9 form a voltage divider circuit, and the fourth capacitor C4 acts as a voltage stabilizer to ensure the voltage input to the voltage divider circuit stable; and the seventh resistor R7, the eighth resistor R8, the ninth resistor R9 and the fourth capacitor C4 constitute a delay shutdown circuit, by adjusting the capacity of the fourth capacitor C4 can adjust the shutdown time of the auxiliary power starting device, the first The larger the capacity of the fourth capacitor C4 is, the longer the shutdown time of the auxiliary power starting device is, and the smaller the capacity of the fourth capacitor C4 is, the shorter the shutdown time of the auxiliary power starting device is.

Example of auxiliary power supply:

This embodiment provides an auxiliary power supply, the structure of which is shown in Figure 6, including a power supply control chip, an auxiliary power supply coil and a starting device, the voltage output terminal of the starting device and the voltage output terminal of the auxiliary power supply coil are connected to the power supply of the power supply control chip end. The starting device is used to control the starting of the power control chip, and supplies power to it during the starting process of the power control chip; when the power control chip is started, the auxiliary power supply coil supplies power to the power control chip. The start-up device in this embodiment has the same structure and working principle as the auxiliary power start-up device in the above-mentioned device embodiment. The auxiliary power start-up device has been introduced in detail in the above-mentioned device embodiment, so there is no further explanation here.

Claims (9)

1. a kind of auxiliary electric source actuating apparatus, which is characterized in that the pass including start-up circuit and for controlling start-up circuit shutdown Deenergizing；The start-up circuit includes a promoter module or at least two promoter modules that are arranged in series；The starting Submodule includes first input end, the first output end and the first power tube, and the first input end connects institute by charging paths The control terminal of the first power tube is stated, the first input end connects the anode of first power tube by the first connection line End, the control terminal of first power tube are connected with the negative pole end of the first power tube by the first voltage-stabiliser tube, first function The negative pole end of rate pipe connects first output end；In the start-up circuit, the first input end of first promoter module is used In connection power supply, the first output end of the last one promoter module is the voltage output of the auxiliary electric source actuating apparatus End, and in addition in remaining each promoter module of the last one promoter module, the control terminal of charging paths and the first power tube Tie point connect the first input end of next promoter module；The breaking circuit is including the second power tube and for connecing The second input terminal of the feedback voltage signal of accessory power supply is received, second input terminal connects described the by the second connection line The positive terminal connection of the control terminal of two power tubes, the negative pole end ground connection of second power tube, second power tube is described most The control terminal of the first power tube in the latter promoter module.

2. auxiliary electric source actuating apparatus according to claim 1, which is characterized in that go here and there and be equipped in second connection line The tie point of first resistor and second resistance, the first resistor and second resistance is grounded by first capacitor, second function The control terminal of rate pipe is connected with the negative pole end of the second power tube by 3rd resistor；The charging paths are by resistive circuit and electricity Hold lines in parallel to constitute, string is equipped with the 4th resistance on the resistive circuit, and string is equipped with the second capacitor on the capacitor lines；It is described String is equipped with the 5th resistance in first connection line.

3. auxiliary electric source actuating apparatus according to claim 1, which is characterized in that in the last one promoter module It is connected between the control terminal of one power tube and ground by the second voltage-stabiliser tube；The voltage output end of the auxiliary electric source actuating apparatus It is provided with the diode for preventing current flowing backwards.

4. a kind of accessory power supply, including power supply control chip, auxiliary power supply coil and starter, the voltage of the starter The voltage output end of output end and the auxiliary power supply coil exists for being electrically connected the feeder ear of the power supply control chip, feature In the starter includes start-up circuit and the breaking circuit for controlling start-up circuit shutdown；The start-up circuit includes One promoter module or at least two promoter modules that are arranged in series；The promoter module includes first input end, One output end and the first power tube, the first input end connect the control terminal of first power tube, institute by charging paths State the positive terminal that first input end connects first power tube by the first connection line, the control terminal of first power tube It is connected with the negative pole end of the first power tube by the first voltage-stabiliser tube, the negative pole end connection described first of first power tube is defeated Outlet；In the start-up circuit, the first input end of first promoter module is for connecting power supply, the last one starting First output end of submodule is the voltage output end of the starter, and in addition to remaining of the last one promoter module is each In promoter module, charging paths with that the tie point of the control terminal of the first power tube connect next promoter module is first defeated Enter end；The breaking circuit includes the second input of the second power tube and the feedback voltage signal for receiving accessory power supply End, second input terminal connect the control terminal of second power tube by the second connection line, second power tube Negative pole end ground connection, the positive terminal of second power tube connect the control of the first power tube in the last one described promoter module End processed.

5. accessory power supply according to claim 4, which is characterized in that string is equipped with first resistor in second connection line And second resistance, the tie point of the first resistor and second resistance pass through first capacitor and are grounded, the control of second power tube End processed is connected with the negative pole end of the second power tube by 3rd resistor.

6. accessory power supply according to claim 4, which is characterized in that the charging paths are by resistive circuit and capacitor lines Parallel connection is constituted, and string is equipped with the 4th resistance on the resistive circuit, and string is equipped with the second capacitor on the capacitor lines.

7. accessory power supply according to claim 4, which is characterized in that string is equipped with the 5th electricity in first connection line Resistance.

8. accessory power supply according to claim 4, which is characterized in that the first power tube in the last one promoter module Control terminal and ground between be connected by the second voltage-stabiliser tube.

9. accessory power supply according to claim 4, which is characterized in that the voltage output end setting of the starter is useful In the diode for preventing current flowing backwards.