WO2017071220A1 - Direct current high-voltage power source, high potential power-extracting apparatus, and power supply method therefor - Google Patents

Abstract

A direct current high-voltage power source, a high potential power-extracting apparatus, and a power supply method therefor, comprising a high-voltage input end (A), a low-voltage input end (B), an power-extracting circuit, a power-storage circuit, a flip-flop circuit, and a throttle circuit. The power-extracting circuit comprises a switch circuit and a control circuit connected to the switch circuit. The switch circuit comprises at least two switches connected in series. The control circuit, by controlling the opening/closing of the switches, controls the high-voltage input end (A) to charge the power-storage circuit. The flip-flop circuit is connected to the power-storage circuit and the switch circuit and is used for controlling, by controlling the opening/closing of the switches, the high-voltage input end (A) to stop charging the power-storage circuit when the power-storage circuit is fully charged. The throttle circuit, connected at an input end thereof to the power-storage circuit and at an output end to the low-voltage output end (B), is used for throttling and constant-current processing of a current outputted by the power-storage circuit and for outputting the processed current to the low-voltage output end (B). The high potential power-extracting apparatus has the advantages of a simple wiring scheme, a large voltage application range, a small leakage current, and an extended power supply time.

Description

DC high voltage power supply, high position energy taking device and power supply method thereof

This application claims priority to Chinese Patent Application No. 201510701625.5, entitled "DC High Voltage Power Supply, High Energy Acquisition Device and Power Supply Method" on October 26, 2015, the entire contents of which are hereby incorporated by reference. Combined in this application.

Technical field

The invention relates to the technical field of switching power supplies, and more particularly to a DC high voltage power supply, a high position energy taking device and a power supply method thereof.

Background technique

With the development and maturity of switching power supply technology, DC high-voltage power supply developed by using high-frequency switching technology combined with the characteristics of high-voltage power supply has become the mainstream. In some specific applications of DC high voltage power supplies, the control circuit needs to use an external power supply to supply power to the drive circuit, otherwise the drive circuit cannot continue to work effectively.

The following is a specific application of a DC high voltage power supply, that is, a typical capacitor energy storage pulse power system. Referring to FIG. 1, the pulse power system includes a DC adjustable voltage source G, a rectifier diode D01, and a freewheeling diode D02. Current limiting resistors R01 and R02, capacitor C, inductor L, stray inductor Ls, voltage measuring device V, and pulse power thyristor string T. The system uses the charger in the DC adjustable voltage source G to charge the capacitor C through the rectifier diode D01 and the current limiting resistor R01, so that the voltage of the capacitor C rises slowly, and when the voltage of the capacitor C reaches a predetermined voltage, the DC adjustable voltage source G will control the charger to turn off. After that, the DC adjustable voltage source G sends a trigger signal to the driving circuits B1 BBn of the pulse power thyristor string T, so that the pulse power thyristor string T is turned on. At this time, the capacitor C passes through the current limiting resistor R02, the inductor L, and the spurs. The inductor Ls and the pulse power thyristor string T are discharged.

Among them, since the driving circuits B1 to Bn need to continuously consume electric energy, an external power supply is usually required to supply power to the driving circuits B1 to Bn. However, the existing external power supply circuit has complicated wiring, large leakage current, and small voltage application range.

Summary of the invention

In view of this, the present invention provides a DC high-voltage power supply, a high-level energy-taking device, and a power supply method thereof, to solve the problems of complicated wiring, large leakage current, and small voltage application range of the external power supply circuit.

To achieve the above object, the present invention provides the following technical solutions:

A high-level energy-taking device comprises a high-voltage input terminal, a low-voltage output terminal, a power-taking circuit, a storage circuit, a latch circuit and a throttle circuit;

The power take-off circuit includes a switch circuit and a control circuit connected to the switch circuit, the input end of the switch circuit is connected to the high voltage input end, and the output end is connected to the energy storage circuit, the switch circuit includes at least two a series switch, the control circuit controlling the high voltage input terminal to charge the energy storage circuit by controlling conduction of the switch;

The latch circuit is connected to the energy storage circuit and the switch circuit, and is configured to control the high voltage input terminal to stop the storage by controlling off of the switch after charging of the energy storage circuit is completed Capable of charging the circuit;

The input end of the throttling circuit is connected to the energy storage circuit, and the output end is connected to the low voltage output end, and is used for throttling constant current processing of the current output by the storage circuit, and the processed current is Output to the low voltage output.

Preferably, the control circuit includes a first Zener diode, and the switch circuit includes a first switch and a second switch;

The drain of the first switch is connected to the high voltage input terminal through a first resistor and a second resistor connected in parallel, and a source of the first switch is connected to a gate of the first switch through a third resistor. a gate of the first switch is connected to a cathode of the first Zener diode through a first diode and a fourth resistor;

a source of the second switch is connected to a positive pole of the first Zener diode, and a gate of the second switch is connected to a cathode of the first Zener diode through the fourth resistor, the second a drain of the switch is connected to a source of the first switch;

The cathode of the first Zener diode is connected to the high voltage input terminal through a fifth resistor.

Preferably, the control circuit comprises a first Zener diode, the switch circuit comprises N first switches and a second switch, N is a natural number greater than 1;

The drain of the first first switch is connected to the high voltage input terminal through a first resistor and a second resistor connected in parallel, and the source of the first first switch passes the first third resistor and the first Said a gate of a switch is connected, a gate of the first switch is passed through a first first diode, a second first diode, and a fourth resistor and a cathode of the first Zener diode connection;

The second drain of the first switch is connected to the source of the first switch, and the source of the second switch is passed through the second third resistor and the second a gate of a switch, a gate of the second switch is connected to a cathode of the first Zener diode through the second first diode and the fourth resistor, and so on ;

a source of the second switch is connected to a positive pole of the first Zener diode, and a gate of the second switch is connected to a cathode of the first Zener diode through the fourth resistor, the second a drain of the switch is connected to a source of the Nth first switch;

The cathode of the first Zener diode is connected to the high voltage input terminal through a fifth resistor.

Preferably, the energy storage circuit includes a first capacitor, a positive pole of the first capacitor is connected to a source of the second switch, and a cathode of the first capacitor is grounded.

Preferably, the latch circuit includes a second Zener diode, a third switch, and a fourth switch;

a cathode of the second Zener diode is connected to a cathode of the first capacitor, and a cathode of the second Zener diode is connected to a cathode of the first capacitor through a sixth resistor;

a gate of the third switch is connected to a gate of the second switch through a seventh resistor, a drain of the third switch is connected to a source of the second switch, and a source of the third switch Connected to the gate of the fourth switch;

a gate of the fourth switch is connected to a positive pole of the second Zener diode, a drain of the fourth switch is connected to a gate of the third switch, a source of the fourth switch is a cathode of the first capacitor is connected, and a gate of the fourth switch is further connected to a source of the fourth switch by a second capacitor;

The third switch is a P-type transistor, and the fourth switch is an N-type transistor.

Preferably, the throttling circuit comprises a constant current device, a light emitting device, a second diode, a third Zener diode and a third capacitor;

An input end of the constant current device is connected to a positive electrode of the first capacitor, an output end of the constant current device is connected to a positive electrode of the light emitting device, and a negative electrode of the light emitting device and the second diode a positive pole is connected, a cathode of the second diode is connected to a cathode of the third Zener diode, and a cathode of the third Zener diode is grounded;

An input end of the constant current device is an input end of the throttling circuit, and a negative terminal of the second diode a connection end with the negative electrode of the third Zener diode is an output end of the throttling circuit;

One end of the third capacitor is connected to the third Zener diode and the other end is connected to the anode of the third Zener diode.

Preferably, the high-level energy-consuming device further includes a fourth Zener diode, a fifth Zener diode, a sixth Zener diode, and a seventh Zener diode;

a cathode of the fourth Zener diode is connected to a drain of the first switch, and a cathode of the fourth Zener diode is connected to a source of the first switch;

a cathode of the fifth Zener diode is connected to a drain of the second switch, and a cathode of the fifth Zener diode is connected to a source of the first switch;

a cathode of the sixth Zener diode is connected to a gate of the first switch, and a cathode of the sixth Zener diode is connected to a source of the first switch;

A cathode of the seventh Zener diode is connected to a cathode of the first capacitor, and a cathode of the seventh Zener diode is connected to a cathode of the first capacitor.

Preferably, the energy storage circuit further includes an eighth Zener diode, a third diode, and a fourth capacitor;

a cathode of the eighth Zener diode is connected to a cathode of the first capacitor, and a cathode is connected to an anode of the third diode;

A cathode of the third diode is connected to a cathode of the fourth capacitor, and a cathode of the fourth capacitor is connected to a cathode of the first capacitor.

A DC high-voltage power supply, comprising a DC adjustable voltage source, a main capacitor, a switching device and a driving circuit thereof, and a high-level energy-consuming device according to any one of the above, the high-voltage input terminal of the high-level energy-consuming device and the An anode connection of the switching device, the low voltage output of the high energy accommodating device is coupled to the input of the drive circuit to supply power to the drive circuit through the energy storage circuit.

A power supply method for a high-level energy-receiving device, which is applied to the high-level energy-consuming device according to any one of the preceding claims, comprising:

The control circuit controls the switch in the switch circuit to be turned on to charge the energy storage circuit through the high voltage input terminal;

After the charging circuit is completed, the latch circuit controls the high voltage input terminal to stop charging the energy storage circuit by controlling the switch to be turned off;

The throttling circuit performs throttling and constant voltage processing on the current output by the energy storage circuit, and processes the processed electricity The flow is output to the low voltage output.

Compared with the prior art, the technical solution provided by the present invention has the following advantages:

The DC high-voltage power supply, the high-level energy-taking device and the power supply method thereof provided by the invention use two wires to connect the high-voltage input end of the high-level energy-receiving device with the anode of the switching device, and connect the low-voltage output end with the input end of the driving circuit. The connection between the high-level energy-consuming device and the DC high-voltage power source can be realized, and the wiring method is relatively simple;

Moreover, the switching circuit in the present invention includes at least two switches connected in series. Therefore, the operating voltage range of the high-level energy-consuming device mainly depends on the withstand voltage values of the switches, that is, as long as the withstand voltage of the switch is sufficiently high, The voltage application range of the high-level energy-consuming device can be greatly expanded;

Secondly, in the present invention, the switch circuit is controlled to be turned off by the latch circuit. Since the leakage current of the latch circuit is much smaller than the leakage current of other similar control circuits, the leakage current of the high-level energy-consuming device during normal operation can be reduced;

Thirdly, the throttling circuit of the present invention can perform throttling and constant voltage processing on the output current of the tank circuit, so that the high-level energizing device can continuously and stably output current to the driving circuit of the DC high-voltage power source.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can obtain other drawings according to the provided drawings without any creative work.

1 is a schematic structural view of a conventional DC high voltage power supply;

2 is a schematic structural diagram of a high-position energy-taking device according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of another high-level energy-taking device according to an embodiment of the present invention; FIG.

4 is a schematic structural diagram of still another high-level energy-taking device according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of still another high-level energy-taking device according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic structural diagram of a DC high voltage power supply according to an embodiment of the present invention; FIG.

FIG. 7 is a flowchart of a method for supplying power to a high-level energy-consuming device according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

An embodiment of the present invention provides a high-level energy-taking device, including a high-voltage input terminal, a low-voltage output terminal, a power-carrying circuit, a tank circuit, a latch circuit, and a throttle circuit;

The power take-off circuit includes a switch circuit and a control circuit connected to the switch circuit. The input end of the switch circuit is connected to the high voltage input end, and the output end is connected to the energy storage circuit. The switch circuit includes at least two switches connected in series, and the control circuit Controlling the high-voltage input terminal to charge the energy storage circuit by controlling the conduction of the switch, so that the energy storage circuit stores the power; the latch circuit is connected with the energy storage circuit and the switch circuit, and the latch circuit is used after the energy storage circuit is charged. The control switch is turned off to control the high voltage input terminal to stop charging to the energy storage circuit; the input end of the throttle circuit is connected with the energy storage circuit, and the output end is connected with the low voltage output terminal for throttling the output current of the energy storage circuit. The pressure treatment is such that the tank circuit continuously and steadily outputs current to the low voltage output terminal.

The high-level energy-taking device in this embodiment has the advantages of simple wiring mode, large voltage application range, small leakage current, that is, low current consumption, and long power supply time.

In the following, a high-performance device in the present invention will be described by taking a specific circuit structure as an example. The circuit structure in the high-level device can be as shown in FIG.

In this embodiment, the control circuit in the energy-supplied circuit includes a first Zener diode W1. The switch circuit includes a first switch Q1 and a second switch Q2. The first switch Q1 and the second switch Q2 are connected in series. Specifically, the first switch Q1 and the second switch Q2 are high voltage MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) or high-voltage IGBTs (Insulated Gate Bipolar Transistors). The first switch Q1 and the second switch Q2 may also be other types of semiconductor switches, and the present invention is not limited thereto. Further, the first switch Q1 and the second switch Q2 are N-type high voltage MOSFETs or IGBTs with low voltage turn-off and high voltage conduction.

The drain of the first switch Q1 is connected to the high voltage input terminal A through the first resistor R1 and the second resistor R2 connected in parallel, and the source of the first switch Q1 is connected to the gate of the first switch Q1 through the third resistor R3. The gate of a switch Q1 is connected to the cathode of the first Zener diode W1 through the first diode D1 and the fourth resistor R4; the source of the second switch Q2 is connected to the anode of the first Zener diode W1, and the second switch The gate of Q2 is connected to the cathode of the first Zener diode W1 through the fourth resistor R4, the drain of the second switch Q2 is connected to the source of the first switch Q1; the cathode of the first Zener diode W1 is passed through the fifth resistor R5. Connected to the high voltage input A.

The working voltage range of the high-level energy-consuming device provided by this embodiment mainly depends on the withstand voltage values of the first switch Q1 and the second switch Q2, that is, as long as the withstand voltage values of the first switch Q1 and the second switch Q2 High enough to greatly expand the voltage application range of the high energy take-off device. Since the first Zener diode W1 only needs to reach the threshold voltage, that is, 20V or more, it can be turned on, and after the first Zener diode W1 is turned on, the high-level energy-taking device can enter the working state, and therefore, the working voltage of the high-level energy-consuming device The minimum can be as low as 100V or less. At the same time, the maximum operating voltage of the high-capacity energy-receiving device depends on the blocking voltage of the first switch Q1 and the second switch Q2. The MOSFET above 1500V such as the STP3N150 device can be realized in the device. The blocking voltage of 3000V, the 4000V single IGBT device on the market, such as IXGF30N400 of IXYS, can achieve 8kV blocking voltage for this device. Therefore, the operating voltage range of the high-level energy absorbing device in the present embodiment is 100V to 8kV and above.

In this embodiment, the energy storage circuit includes a first capacitor C1. The anode of the first capacitor C1 is connected to the source of the second switch Q2, and the cathode of the first capacitor C1 is grounded.

In this embodiment, the latch circuit includes a second Zener diode W2, a third switch Q3, and a fourth switch Q4. The third switch Q3 is a P-type transistor with a low voltage conduction and a high voltage shutdown, and the fourth switch Q4 is a high voltage conduction, low voltage shutdown N-type transistor, specifically, the third switch Q3 and the fourth Switch Q4 can be a MOSFET or other type of transistor.

The cathode of the second Zener diode W2 is connected to the anode of the first capacitor C1, the anode of the second Zener diode W2 is connected to the cathode of the first capacitor C1 through the sixth resistor R6, and the gate of the third switch Q3 is passed through the seventh resistor. R7 is connected to the gate of the second switch Q2, the drain of the third switch Q3 is connected to the source of the second switch Q2, the source of the third switch Q3 is connected to the gate of the fourth switch Q4, and the fourth switch Q4 is connected. The gate is connected to the anode of the second Zener diode W2, the drain of the fourth switch Q4 is connected to the gate of the third switch Q3, the source of the fourth switch Q4 is connected to the cathode of the first capacitor C1, and the fourth The gate of the switch Q4 is also connected to the source of the fourth switch Q4 through the second capacitor C2.

Based on this, the second Zener diode W2, the third switch Q3 and the fourth switch Q4 constitute a monostable The logic latch circuit topology is such that the latch circuit controls the first switch Q1 and the second switch Q2 to be turned off after the first capacitor C1 is charged.

In this embodiment, the throttle circuit includes a constant current device CRD, a light emitting device LED, a second diode D2, a third Zener diode W3, and a third capacitor C3; the input end of the constant current device CRD and the first capacitor C1 The positive electrode is connected, the output end of the constant current device CRD is connected to the positive electrode of the light emitting device LED, the negative electrode of the light emitting device LED is connected to the positive electrode of the second diode D2, the negative electrode of the second diode D2 and the third Zener diode W3 The negative electrode is connected, and the positive electrode of the third Zener diode W3 is grounded; one end of the third capacitor C3 is connected to the negative electrode of the third Zener diode W3, and the other end is connected to the positive electrode of the third Zener diode W3.

The function of the LED of the light-emitting device is to observe whether a current passes through the throttling circuit. When a current passes, the LED of the light-emitting device emits light, and when no current passes, the LED of the light-emitting device does not emit light. In addition, the input end of the constant current device CRD is the input end of the throttling circuit, and the connection end of the negative pole of the second diode D2 and the negative pole of the third Zener diode W3 is the output end of the throttling circuit, and the output end and the low voltage Output B is connected.

Specifically, the low-voltage output terminal B outputs a current of 5 V, 5 mA, and the power supply time depends on the size of the first capacitor C1. The larger the first capacitor C1 is, the longer the power supply time is. According to calculation, the capacitance of 9.4 mF can be The drive circuit for DC high voltage is supplied with power for more than 50s.

When the low voltage output terminal B is connected to the load, the first capacitor C1, the constant current device CRD, the light emitting device LED, the second diode D2, the third Zener diode W3, and the third capacitor C3 form a power supply circuit and are stored in the first The electric energy in the capacitor C1 is released to the load circuit through the constant current device CRD and the second diode D2, etc., thereby ensuring the normal operation of the load circuit. When the high-level energy-consuming device in this embodiment is applied in a DC high-voltage power supply, the load circuit is a driving circuit in the DC high-voltage power supply control circuit.

The working principle of the high-level energy-carrying device is as follows: at the initial moment, the high voltage input from the high-voltage input terminal A forms the gate bias voltages of the first switch Q1 and the second switch Q2 on the first Zener diode W1 through the fifth resistor R5. At this time, the second switch Q2 is turned on, and the second switch Q2 of the first switch Q1 is turned on, so that the turn-on voltage of the first switch Q1 is equal to that of the first Zener diode W1. The regulation value is such that the first switch Q1 is turned on.

After the first switch Q1 and the second switch Q2 are turned on, the current input by the high voltage input terminal A flows through the first resistor R1, the second resistor R2, the turned-on first switch Q1, and the second switch Q2 to the first capacitor. C1, fast charging of the first capacitor C1 is realized, and the charging speed thereof depends on the resistance values of the first resistor R1 and the second resistor R2. Of course, during the charging of the first capacitor C1, a small amount of current will flow to the throttling circuit. However, under the action of the constant current device CRD, this part of the current will be very small and negligible.

During the charging of the first capacitor C1, the voltage across the second Zener diode W2 is continuously increased. When the voltage across the second Zener diode W2 reaches the breakdown voltage of the second Zener diode W2, the second Zener diode W2 is turned on. When the fourth switch Q4 is connected to the gate, a bias voltage is established, and as the amount of electricity in the first capacitor C1 increases, the gate bias voltage of the fourth switch Q4 is higher and higher until the fourth switch is reached. When the on voltage of Q4 is turned on, the fourth switch Q4 is turned on.

After the fourth switch Q4 is turned on, the gate voltages of the first switch Q1, the second switch Q2, and the third switch Q3 are pulled down, causing the second switch Q2 to be turned off and the third switch Q3 to be turned on. Wherein, the second switch Q2 is turned off, so that the drain of the second switch Q2, that is, the source potential of the first switch Q1 is raised, because the gate potential of the first switch Q1 is already pulled lower for the fourth switch Q4, therefore, An increase in the potential of the source of a switch Q1 causes the turn-on voltage of the first switch Q1 to decrease, thereby causing the first switch Q1 to turn off. After the first switch Q1 and the second switch Q2 are turned off, the high voltage input terminal A and the first capacitor C1 are turned off. At this time, the charging process of the first capacitor C1 is completed, and the electric energy is stored in the first. Capacitor C3.

In addition, after the third switch Q3 is turned on, the high voltage input terminal A supplies power to the gate of the fourth switch Q4 through the fifth resistor R5, the first Zener diode W1 and the third switch Q3, so that the gate of the fourth switch Q4 is biased. The voltage is higher than its own turn-on voltage, so that the fourth switch Q4 is in an on state for a long time, until the voltage of the high voltage input terminal A decreases, that is, after the gate bias voltage of the fourth switch Q4 decreases below the turn-on voltage. The fourth switch Q4 is turned off.

When the load circuit connected to the low-voltage output terminal B receives the trigger signal, the load circuit starts to work, and the first capacitor C1 supplies power to the load circuit through the throttle circuit. In the process, the throttle circuit performs the current output by the first capacitor C1. The constant current processing is throttled so that the first capacitor C1 outputs a small current to the load circuit for a long time until the voltage of the first capacitor C1 is reset to zero. Of course, the charging and discharging process of the first capacitor C1 can be repeated in a short time to ensure stable operation of the load circuit.

Wherein, in the process that the first switch Q1 is turned off, the source and the gate of the first switch Q1 can release excess power through the third resistor R3, and the high-voltage one-way isolation can be realized by the first diode D1. Avoiding the high voltage of the gate of the first switch Q1 affects the turn-off of the first switch Q1.

On the basis of the circuit structure shown in FIG. 2, the high-level energy-consuming device according to another embodiment of the present invention further includes a fourth Zener diode W4, a fifth Zener diode W5, a sixth Zener diode W6, and a seventh voltage regulator. Diode W7 is effective to protect its parallel devices from voltage breakdown.

As shown in FIG. 3, the cathode of the fourth Zener diode W4 is connected to the drain of the first switch Q1, the anode of the fourth Zener diode W4 is connected to the source of the first switch Q1, and the cathode of the fifth Zener diode W5. Connected to the drain of the second switch Q2, the anode of the fifth Zener diode W5 is connected to the source of the first switch Q1; the cathode of the sixth Zener diode W6 is connected to the gate of the first switch Q1, and the sixth voltage regulator The anode of the diode W6 is connected to the source of the first switch Q1; the cathode of the seventh Zener diode W7 is connected to the anode of the first capacitor C1, and the anode of the seventh Zener diode W7 is connected to the cathode of the first capacitor C1.

On the basis of the high-level energy-supplied device provided by any of the above embodiments, the high-level energy-consuming device further includes an eighth Zener diode W8, a third diode D3, and a fourth capacitor C4. As shown in FIG. 4, the anode of the eighth Zener diode W8 is connected to the anode of the first capacitor C1, the anode of the eighth Zener diode W8 is connected to the anode of the third diode D3, and the cathode of the third diode D3. Connected to the anode of the fourth capacitor C4, the cathode of the fourth capacitor C4 is connected to the cathode of the first capacitor C1.

During the charging of the first capacitor C1, the fourth capacitor C4 is also fully charged in the state in which the eighth Zener diode W8 is broken down. Of course, the voltage of the fourth capacitor C4 after being fully charged is higher than that after the full charge. The voltage of a capacitor C1 is low. Wherein, the third diode D3 functions to isolate the fourth capacitor C4, so that the voltage of the fourth capacitor C4 can be kept constant throughout the operation. In this embodiment, the first capacitor C1 is equivalent to one energy storage branch, and the fourth capacitor C4 is equivalent to another energy storage branch. During the discharge of the first capacitor C1, the fourth capacitor C4 can also supply power to the load circuit. Thus, multi-branch power supply of the energy storage circuit is realized. That is to say, in other embodiments, a plurality of capacitors may be connected in parallel with the first capacitor C1 to implement multi-leg power supply of the tank circuit.

In the above embodiment, the switch circuits in the power take-off circuit each include a first switch Q1 and a second switch Q2. However, the present invention is not limited thereto. In other embodiments, the switch circuit may include N A switch and a second switch, N being a natural number greater than one.

In the following, the switching circuit includes two first switches and one second switch as an example for description. As shown in FIG. 5, the drain of the first first switch Q10 is connected to the high voltage input terminal A through the first resistor R1 and the second resistor R2 connected in parallel, and the source of the first first switch Q10 passes through the first Three resistors R30 and The gate of the first first switch Q10 is connected, and the gate of the first first switch Q10 passes through the first first diode D10, the second first diode D11, and the fourth resistor R4 and the first The negative electrode of the Zener diode W1 is connected;

The drain of the second first switch Q11 is connected to the source of the first first switch Q10, and the source of the second first switch Q11 is passed through the second third resistor R31 and the second first switch Q11. Gate connection, the gate of the second first switch Q11 is connected to the cathode of the first Zener diode W1 through the second first diode D11 and the fourth resistor R4;

The source of the second switch Q2 is connected to the anode of the first Zener diode W1, the gate of the second switch Q2 is connected to the cathode of the first Zener diode W1 through the fourth resistor R4, and the drain of the second switch Q2 is The sources of the two first switches Q11 are connected;

The cathode of the first Zener diode W1 is connected to the high voltage input terminal A through a fifth resistor R5.

In this embodiment, by adding a first switch, a third resistor, and a sixth Zener diode, the performance parameters of the high-level energy-consuming device are improved, and the withstand voltage characteristic is improved, wherein each time a first switch is added, the high-position is taken. The pressure resistance of the device can be increased proportionally.

The high-level energy-taking device provided in this embodiment uses two wires to connect the high-voltage input end of the high-level energy-receiving device to the anode of the switching device of the DC high-voltage power supply, and connects the low-voltage output end with the input end of the driving circuit, that is, the load circuit. The connection between the high-level energy-consuming device and the DC high-voltage power source is realized, and the wiring mode is relatively simple;

Secondly, the switching circuit comprises a first switch and a second switch connected in series. Therefore, the operating voltage range of the high-level energy-consuming device mainly depends on the withstand voltage of the switches, that is, as long as the withstand voltage of the switch is sufficiently high, The voltage application range of the high-level energy-consuming device is greatly expanded, and the working voltage of the high-level energy-consuming device in the embodiment ranges from 100V to 8kV and above;

Again, the latch circuit formed by the second Zener diode, the third switch, and the fourth switch can control the turn-off of the first switch and the second switch, because the leakage current of the latch circuit is much smaller than the leakage current of other similar control circuits. Therefore, the leakage current of the high-level energy-consuming device during normal operation can be reduced; the throttle circuit can perform the throttling and constant-voltage processing on the output current of the energy storage circuit, so that the high-level energy-consuming device can continuously and stably flow to the DC high-voltage power supply. The drive circuit outputs a small current, which delays the power supply time of the high-level energy-consuming device.

An embodiment of the present invention also provides a DC high voltage power supply, as shown in FIG. 6, including DC. The adjustable voltage source G, the main capacitor C, the switching device T, the driving circuit Bn, and the high-level energy-consuming device provided by any of the above embodiments, wherein the switching device T is a thyristor, the positive output end of the driving circuit Bn and the switching device T The gate is connected, and the negative output terminal of the driving circuit Bn is connected to the cathode K of the switching device T to drive the switching device T to operate by the driving circuit Bn.

In addition, the high-voltage input terminal A of the high-level energy-receiving device is connected to the anode of the switching device T, and the low-voltage output terminal B of the high-level energy-consuming device is connected to the positive input terminal of the driving circuit Bn, and the grounding end of the high-level energy-consuming device and the driving circuit Bn The negative input is connected to supply power to the drive circuit Bn through the tank circuit.

In the DC high-voltage power supply provided by the embodiment, the high-level energy-taking device takes power from the high-voltage end of the DC high-voltage power supply, thereby eliminating the need for an external power supply to supply power to the driving circuit, and eliminating the need to isolate the high-level energy-consuming device and the high-voltage terminal, thereby reducing the power supply cost. Moreover, it avoids the safety accident caused by improper isolation of the external power source from the high voltage end, and can also cause a small leakage current of the DC high voltage power supply.

An embodiment of the present invention further provides a power supply method for a high-level energy-splitting device, which is applied to the high-level energy-receiving device provided in any of the above embodiments. As shown in FIG. 7, the method includes:

S701: The control circuit controls the switch in the switch circuit to be turned on to charge the energy storage circuit through the high voltage input terminal;

The power supply method will be described by taking the high-level energy-consuming device shown in FIG. 2 as an example. At the initial moment, the high voltage input to the high voltage input terminal A forms a switch, that is, a gate bias voltage of the first switch Q1 and the second switch Q2, through the fifth resistor R5 on the control circuit, that is, the first Zener diode W1. At this time, the second The switch Q2 is turned on, and the second switch Q2 of the first switch Q1 is turned on, so that the turn-on voltage of the first switch Q1 is equal to the voltage regulator of the first Zener diode W1, thereby The first switch Q1 is turned on.

After the first switch Q1 and the second switch Q2 are turned on, the current input by the high voltage input terminal A flows through the first resistor R1, the second resistor R2, the turned-on first switch Q1, and the second switch Q2 to the storage circuit. A capacitor C1 realizes fast charging of the first capacitor C1, and the charging speed thereof depends on the resistance values of the first resistor R1 and the second resistor R2.

S702: after the charging circuit is completed, the latch circuit controls the high voltage input terminal to stop charging the energy storage circuit by controlling the switch to be turned off;

During the charging of the first capacitor C1, the voltage across the second Zener diode W2 in the latch circuit is continuously increased, and when the voltage across the two terminals reaches the breakdown voltage of the second Zener diode W2, the second The Zener diode W2 is turned on. At this time, a bias voltage is established on the gate of the fourth switch Q4 in the latch circuit, and the gate of the fourth switch Q4 is offset as the amount of power in the first capacitor C1 is continuously increased. The set voltage will be higher and higher until the fourth switch Q4 is turned on, and the fourth switch Q4 is turned on.

After the fourth switch Q4 is turned on, the gate voltages of the first switch Q1, the second switch Q2, and the third switch Q3 of the latch circuit are pulled down, causing the second switch Q2 to be turned off and the third switch Q3 to be turned on. Wherein, the second switch Q2 is turned off, so that the drain of the second switch Q2, that is, the source potential of the first switch Q1 is raised, because the gate potential of the first switch Q1 is already pulled lower for the fourth switch Q4, therefore, An increase in the potential of the source of a switch Q1 causes the turn-on voltage of the first switch Q1 to decrease, thereby causing the first switch Q1 to turn off. After the first switch Q1 and the second switch Q2 are turned off, the high voltage input terminal A and the first capacitor C1 are turned off. At this time, the charging process of the first capacitor C1 is completed, and the electric energy is stored in the first. Capacitor C3.

S703: The throttling circuit performs throttling and constant voltage processing on the current output by the energy storage circuit, and outputs the processed current to the low voltage output end.

When the load circuit connected to the low-voltage output terminal B receives the trigger signal, the load circuit starts to work, and the first capacitor C1 supplies power to the load circuit through the throttle circuit. In the process, the throttle circuit performs the current output by the first capacitor C1. The constant current processing is throttled so that the first capacitor C1 outputs a small current to the load circuit for a long time until the voltage of the first capacitor C1 is reset to zero. Of course, the charging and discharging process of the first capacitor C1 can be repeated in a short time to ensure stable operation of the load circuit.

The power supply method of the high-level energy-consuming device provided by the embodiment determines the charging and discharging of the energy-storing circuit by turning on and off the switch in the switch circuit, so that the switch with high withstand voltage can be used to improve the high-level energy-consuming device. The range of voltage application; the latch circuit controls the turn-off of the switch in the switch circuit to stop charging of the first capacitor. Since the leakage current of the latch circuit is much smaller than the leakage current of other similar control circuits, the high level can be reduced. The leakage current of the energy-consuming device during normal operation; the throttle current circuit performs throttling and constant-voltage processing on the output current of the energy storage circuit, so that the high-level energy-consuming device can continuously and stably output a small current to the driving circuit of the DC high-voltage power supply, and further The power supply time of the high energy accommodating device is delayed.

The various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but the scope of the invention is to be accorded

Claims (10)

1. A high-level energy-taking device, comprising: a high-voltage input terminal, a low-voltage output terminal, a power-taking circuit, a storage circuit, a latch circuit and a throttle circuit;

   The power take-off circuit includes a switch circuit and a control circuit connected to the switch circuit, the input end of the switch circuit is connected to the high voltage input end, and the output end is connected to the energy storage circuit, the switch circuit includes at least two a series switch, the control circuit controlling the high voltage input terminal to charge the energy storage circuit by controlling conduction of the switch;

   The latch circuit is connected to the energy storage circuit and the switch circuit, and is configured to control the high voltage input terminal to stop the storage by controlling off of the switch after charging of the energy storage circuit is completed Capable of charging the circuit;

   The input end of the throttling circuit is connected to the energy storage circuit, and the output end is connected to the low voltage output end, and is used for throttling constant current processing of the current output by the storage circuit, and the processed current is Output to the low voltage output.
2. The high energy energy absorbing device according to claim 1, wherein the control circuit comprises a first Zener diode, and the switch circuit comprises a first switch and a second switch;

   The drain of the first switch is connected to the high voltage input terminal through a first resistor and a second resistor connected in parallel, and a source of the first switch is connected to a gate of the first switch through a third resistor. a gate of the first switch is connected to a cathode of the first Zener diode through a first diode and a fourth resistor;

   a source of the second switch is connected to a positive pole of the first Zener diode, and a gate of the second switch is connected to a cathode of the first Zener diode through the fourth resistor, the second a drain of the switch is connected to a source of the first switch;

   The cathode of the first Zener diode is connected to the high voltage input terminal through a fifth resistor.
3. The high energy energy absorbing device according to claim 1, wherein the control circuit comprises a first Zener diode, the switch circuit comprising N first switches and a second switch, N being a natural number greater than one;

   The drain of the first first switch is connected to the high voltage input terminal through a first resistor and a second resistor connected in parallel, and the source of the first first switch passes the first third resistor and the first The gates of the first switches are connected, and the gates of the first ones of the first switches pass through the first first diode, the second first diode, and the fourth resistor with the first stable The negative connection of the voltage diode;

   The second drain of the first switch is connected to the source of the first switch, and the source of the second switch is passed through the second third resistor and the second a gate of a switch, a gate of the second switch is connected to a cathode of the first Zener diode through the second first diode and the fourth resistor, and so on ;

   a source of the second switch is connected to a positive pole of the first Zener diode, and a gate of the second switch is connected to a cathode of the first Zener diode through the fourth resistor, the second a drain of the switch is connected to a source of the Nth first switch;

   The cathode of the first Zener diode is connected to the high voltage input terminal through a fifth resistor.
4. The high energy energy absorbing device according to claim 2 or 3, wherein the energy storage circuit comprises a first capacitor, and a positive pole of the first capacitor is connected to a source of the second switch, the first The negative pole of the capacitor is grounded.
5. The high energy energy absorbing device according to claim 4, wherein the latch circuit comprises a second Zener diode, a third switch, and a fourth switch;

   a cathode of the second Zener diode is connected to a cathode of the first capacitor, and a cathode of the second Zener diode is connected to a cathode of the first capacitor through a sixth resistor;

   a gate of the third switch is connected to a gate of the second switch through a seventh resistor, a drain of the third switch is connected to a source of the second switch, and a source of the third switch Connected to the gate of the fourth switch;

   a gate of the fourth switch is connected to a positive pole of the second Zener diode, a drain of the fourth switch is connected to a gate of the third switch, a source of the fourth switch is a cathode of the first capacitor is connected, and a gate of the fourth switch is further connected to a source of the fourth switch by a second capacitor;

   The third switch is a P-type transistor, and the fourth switch is an N-type transistor.
6. The high energy energy absorbing device according to claim 5, wherein the throttling circuit comprises a constant current device, a light emitting device, a second diode, a third Zener diode, and a third capacitor;

   An input end of the constant current device is connected to a positive electrode of the first capacitor, an output end of the constant current device is connected to a positive electrode of the light emitting device, and a negative electrode of the light emitting device and the second diode a positive pole is connected, a cathode of the second diode is connected to a cathode of the third Zener diode, and a cathode of the third Zener diode is grounded;

   An input end of the constant current device is an input end of the throttling circuit, and a negative terminal of the second diode a connection end with the negative electrode of the third Zener diode is an output end of the throttling circuit;

   One end of the third capacitor is connected to the third Zener diode and the other end is connected to the anode of the third Zener diode.
7. The high energy energy absorbing device according to claim 6, wherein the high energy energy absorbing device further comprises a fourth Zener diode, a fifth Zener diode, a sixth Zener diode, and a seventh Zener diode;

   a cathode of the fourth Zener diode is connected to a drain of the first switch, and a cathode of the fourth Zener diode is connected to a source of the first switch;

   a cathode of the fifth Zener diode is connected to a drain of the second switch, and a cathode of the fifth Zener diode is connected to a source of the first switch;

   a cathode of the sixth Zener diode is connected to a gate of the first switch, and a cathode of the sixth Zener diode is connected to a source of the first switch;

   A cathode of the seventh Zener diode is connected to a cathode of the first capacitor, and a cathode of the seventh Zener diode is connected to a cathode of the first capacitor.
8. The high energy energy absorbing device according to any one of claims 1 to 7, wherein the energy storage circuit further comprises an eighth Zener diode, a third diode and a fourth capacitor;

   a cathode of the eighth Zener diode is connected to a cathode of the first capacitor, and a cathode is connected to an anode of the third diode;

   A cathode of the third diode is connected to a cathode of the fourth capacitor, and a cathode of the fourth capacitor is connected to a cathode of the first capacitor.
9. A DC high-voltage power supply, comprising a DC adjustable voltage source, a main capacitor, a switching device and a driving circuit thereof, characterized by further comprising the high-level energy-taking device according to any one of claims 1 to 8, wherein the high-level energy-capaciting device A high voltage input of the device is coupled to an anode of the switching device, and a low voltage output of the high energy harvesting device is coupled to an input of the drive circuit to provide power to the drive circuit through a tank circuit.
10. A power supply method for a high-level energy absorbing device, characterized by being applied to the high-level energy-storing device according to any one of claims 1 to 8, comprising:

    The control circuit controls the switch in the switch circuit to be turned on to charge the energy storage circuit through the high voltage input terminal;

    After the charging circuit is completed, the latch circuit controls the high voltage input terminal to stop charging the energy storage circuit by controlling the switch to be turned off;

    The throttling circuit performs throttling and constant voltage processing on the current output by the storage circuit, and outputs the processed current to the low voltage output terminal.

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