CN217133258U - High-voltage pulse heavy-current state detection circuit - Google Patents
High-voltage pulse heavy-current state detection circuit Download PDFInfo
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- CN217133258U CN217133258U CN202220473104.4U CN202220473104U CN217133258U CN 217133258 U CN217133258 U CN 217133258U CN 202220473104 U CN202220473104 U CN 202220473104U CN 217133258 U CN217133258 U CN 217133258U
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Abstract
The application relates to a high-voltage pulse large-current state detection circuit, which comprises an isolation transformer, an AC/DC power supply, a Rogowski coil, an integrator and a signal detection board; the output end of the isolation transformer is connected with the input end of the AC/DC power supply; the output end of the AC/DC power supply is connected with the input end of the signal detection board; the output end of the AC/DC power supply is also connected with the input end of the integrator; the input end of the integrator is also connected with the output end of the Rogowski coil; the output end of the integrator is connected with the signal detection board, the signal detection board comprises a first amplification signal module, a first optical signal output module and a first relay, the output end of the first relay is electrically connected with the input end of the first amplification signal module, and the output end of the first amplification signal module is electrically connected with the input end of the first optical signal. Whether the branch is normally conducted or not is judged by detecting the switching value of an optical signal output by a current threshold, and the safety of a control loop is guaranteed in an optical fiber transmission mode.
Description
Technical Field
The application relates to the field of current state detection, in particular to a high-voltage pulse large-current state detection circuit.
Background
In some high power electromagnetic pulse applications, energy is typically stored by slowly charging a high voltage capacitor and delivered to the load by discharging the load through a thyristor switch. The charging voltage of the capacitor is usually as high as 20KV, the peak value of the discharging current is 5-15KA, and the capacitor has the characteristic of large short-time current. At present, the on-state average current of a commonly used high-voltage high-power thyristor is maximum 6KA, and the commonly used high-voltage high-power thyristor has single overcurrent capacity in a short time, so that for the application requiring 15KA current, a discharge circuit is realized by connecting three thyristor branches in parallel. If one or two branches are not opened, current is borne by the opened branches, and the situation easily causes overcurrent damage of the thyristor after a plurality of times.
The confirmation of the opening condition of each branch circuit during each discharge is an important guarantee for the safe operation of the circuit. The traditional detection mode adopts the current peak value of each branch circuit to judge whether the branch circuit is conducted or not when the detection is discharged, the circuit adopts analog quantity transmission, and signal cables are arranged in a high-voltage environment, so that high voltage caused by mechanical impact damage is easy to be connected into signals in series, and a control loop is completely damaged.
SUMMERY OF THE UTILITY MODEL
In view of this, the present application provides a high voltage pulse large current state detection circuit, which can detect whether a branch is normally turned on by detecting a switching value of an optical signal output by a current threshold, so as to prevent a high voltage from being connected to a control loop in series, thereby ensuring the safety of the control loop.
According to an aspect of the present application, a high voltage pulse large current state detection circuit is provided, which includes an isolation transformer, an AC/DC power supply, a rocco coil, an integrator, and a signal detection board;
the output end of the isolation transformer is electrically connected with the input end of the AC/DC power supply;
the AC/DC power output end is electrically connected with the input end of the signal detection plate;
the AC/DC power output end is also electrically connected with the input end of the integrator;
the input end of the integrator is also electrically connected with the output end of the Rogowski coil;
the output end of the integrator is electrically connected with the input end of the signal detection plate;
the signal detection board comprises a first amplified signal module, a first optical signal output module and a first relay;
the output end of the first relay is electrically connected with the input end of the first amplified signal module;
the output end of the first amplification signal module is electrically connected with the output end of the first optical signal.
In a possible implementation manner, the first amplified signal module includes a first resistor, a second resistor, a third resistor, a first potentiometer, a first capacitor, a second capacitor, a third capacitor, a first integrated operational amplifier, and a first triode;
the first resistor is electrically connected with a non-inverting input end of the first integrated operational amplifier;
the output end of the first potentiometer is electrically connected with the inverting input end of the first integrated operational amplifier, and the first capacitor is connected with the first potentiometer in parallel;
the output end of the first integrated operational amplifier is electrically connected with the third resistor, the second resistor and the second capacitor are respectively connected in parallel with the first integrated operational amplifier, and the third resistor is electrically connected with the input end of the first triode;
one end of the third capacitor is connected with the third resistor, and the other end of the third capacitor is connected with the output end of the first triode;
and the output end of the first triode is electrically connected with the input end of the first optical signal output module.
In one possible implementation manner, the first optical signal output module includes a first optical fiber transmitter, a fourth resistor, a fifth resistor, a fourth capacitor, and a first diode;
the output end of the first optical fiber transmitter is connected with the fourth resistor, the fourth resistor is connected with the fifth resistor in parallel, the fifth resistor is electrically connected with the input end of the first diode, the output end of the first diode is electrically connected with the input end of the first optical fiber transmitter, and the fourth capacitor is connected with the first optical fiber transmitter in parallel.
In a possible implementation manner, the signal detection board further includes a second amplified signal module, and a second optical signal output module;
the second amplified signal module comprises a sixth resistor, a seventh resistor, an eighth resistor, a second potentiometer, a fifth capacitor, a sixth capacitor, a second integrated operational amplifier and a second triode;
the sixth resistor is electrically connected with the non-inverting input end of the second integrated operational amplifier;
the output end of the second potentiometer is electrically connected with the inverting input end of the second integrated operational amplifier, and the fifth capacitor is connected with the second potentiometer in parallel;
the output end of the second integrated operational amplifier is connected with the eighth resistor, the seventh resistor and the sixth capacitor are respectively connected with the second integrated operational amplifier in parallel, and the eighth resistor is electrically connected with the input end of the second triode;
one section of the seventh capacitor is connected with the eighth resistor, and the other end of the seventh capacitor is connected with the output end of the second triode;
and the output end of the second triode is electrically connected with the input end of the second optical signal output end module.
In one possible implementation manner, the second optical signal output module includes a second optical fiber transmitter, a ninth resistor, a tenth resistor, an eighth capacitor, and a second diode;
the output end of the second optical fiber transmitter is connected with the ninth resistor, the ninth resistor is connected with the tenth resistor in parallel, the tenth resistor is electrically connected with the input end of the second diode, the output end of the second diode is electrically connected with the input end of the second optical fiber transmitter, and the eighth capacitor is connected with the second optical fiber transmitter in parallel.
In one possible implementation manner, the signal detection board further includes a power supply module;
the power supply module comprises a second relay, a three-terminal voltage regulator and a ninth capacitor;
the output end of the second relay is electrically connected with the input end of the three-terminal regulator;
the output end of the three-terminal voltage stabilizer is connected with the ninth capacitor;
and the other end of the ninth capacitor is connected with the input end of the second relay.
In one possible implementation manner, the isolation transformer is a 30KV isolation transformer, and an output signal of the isolation transformer is transmitted by using an optical fiber.
The high-voltage pulse heavy current state detection circuit of the embodiment of the application uses the mode detection circuit of light signal output to switch on the condition, and the signal detection board outputs the light signal switching value according to the current signal size to realize detection, so that the problem that the traditional circuit adopts analog quantity transmission, and a signal cable is in a high-voltage environment and is easy to damage in order to lead to a control loop is solved. In summary, the detection of the circuit conduction condition is performed in the optical signal output mode, so that the safety of the control loop can be guaranteed.
Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.
Fig. 1 shows a circuit diagram of a high-voltage pulsed large-current state detection circuit arrangement according to an embodiment of the present application;
fig. 2 is a circuit diagram showing an operation of a signal detection board of the high-voltage pulse large-current state detection circuit device according to the embodiment of the present application;
fig. 3 is a circuit diagram of a signal detection board power module of the high-voltage pulse large-current detection circuit device according to the embodiment of the present application.
Detailed Description
Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
It will be understood, however, that the terms "central," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present application or for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present application.
Fig. 1 shows a circuit diagram of a high-voltage pulse large-current state detection circuit according to an embodiment of the present application. Fig. 2 is a circuit diagram illustrating an operation of the signal detection board of the high-voltage pulse large-current state detection circuit according to the embodiment of the present application. As shown in fig. 1 or fig. 2, the high-voltage pulse large-current state detection circuit is used for detecting a circuit conduction condition, and the detection circuit includes an isolation transformer 110, an AC/DC power supply 120, a rocco coil 130, an integrator 140, and a signal detection board 150, wherein an output terminal of the isolation transformer 110 is electrically connected to an input terminal of the AC/DC power supply 120, an output terminal of the AC/DC power supply 120 is electrically connected to an input terminal of the signal detection board 150, an output terminal of the AC/DC power supply 120 is also electrically connected to an input terminal of the integrator 140, an input terminal of the integrator 140 is also electrically connected to an output terminal of the rocco coil 130, and an output terminal of the integrator 140 is electrically connected to an input terminal of the signal detection board 150. The signal detection board 150 comprises a first amplified signal module 151, a first optical signal output module 152 and a first relay J1, wherein the output end of the first relay J1 is electrically connected with the input end of the first amplified signal template 151, and the output end of the first amplified signal template 151 is electrically connected with the output end of the first optical signal output module 152.
When the detection circuit in the embodiment of the application works, firstly, a power supply passes through the 30KV isolation transformer 110 and is rectified into a 24V direct-current power supply through the AC/DC power supply 120, the rectified 24V direct-current power supply is used for supplying power to the integrator 140 and the signal detection board 150, wherein the rocco coil 130 detects a current signal in a core-through cable mode, converts the current signal of 0-8KA into a 0-5V signal through the integrator 140 and transmits the 0-5V signal to the signal detection board 150, the signal detection board 150 compares the 0-5V signal, and finally, an optical signal is emitted through the first optical signal output module 152, so that the conduction condition of the circuit is judged. The detection of the detection circuit is completed through the signal detection plate, the detection of the circuit conduction condition can be realized through the form of optical signal output, and the safety of a control loop is effectively guaranteed.
In a possible implementation manner, the first amplified signal module 151 includes a first resistor R12, a second resistor R14, a third resistor R15, a first potentiometer W1, a first capacitor C12, a second capacitor C13, a third capacitor C14, a first integrated operational amplifier U2A, and a first triode U3, where the first resistor R12 is electrically connected to a non-inverting input terminal of the first integrated operational amplifier U2A, an output terminal of the first potentiometer W1 is electrically connected to an inverting input terminal of the first integrated operational amplifier U2A, and the first capacitor C12 is connected to the first potentiometer W1 in parallel. The output end of the first integrated operational amplifier U2A is electrically connected to the third resistor R15, the second resistor R14 and the second capacitor C13 are respectively connected in parallel to the first integrated operational amplifier U2A, and the third resistor R15 is electrically connected to the input end of the first triode U3. One end of the third capacitor C14 is connected to the third resistor R15, and the other end is connected to the output end of the first transistor U3. The output terminal of the first transistor U3 is electrically connected to the input terminal of the first optical signal output module 152.
Here, it should be noted that the 0-5V signal converted by the integrator 140 is introduced into the signal detection board 150 by the first relay, wherein in the first amplified signal module 151, the first integrated operational amplifier U2A compares the voltage across the first potentiometer W1 with the 0-5V signal input into the signal detection board 150, and when the input signal is greater than the voltage across the first potentiometer W1, i.e. 1.25V, the first integrated operational amplifier U2A outputs a high level to the first optical signal output module 152.
In one possible implementation, the first optical signal output module 152 includes a first optical fiber transmitter Q1, a fourth resistor R16, a fifth resistor R17, a fourth capacitor C15, and a first diode DW 1. The output end of the first optical fiber transmitter Q1 is connected with a fourth resistor R16, a fourth resistor R16 is connected with a fifth resistor R17 in parallel, a fifth resistor R17 is electrically connected with the input end of a first diode DW1, the output end of the first diode DW1 is electrically connected with the input end of the first optical fiber transmitter Q1, and a fourth capacitor C15 is connected with the first optical fiber transmitter Q1 in parallel.
Here, it should be noted that when the first integrated operational amplifier U2A outputs a high level to the first optical signal output module 152, the first transistor U3 thereof turns on the first optical fiber transmitter Q1 to send an optical signal, which indicates that the control loop is normally turned on.
Further, in a possible implementation, the signal detection board 150 further includes a second amplified signal module 153 and a second optical signal output module 154. The second amplifying signal module 153 includes a sixth resistor R22, a seventh resistor R24, an eighth resistor R25, a second potentiometer W2, a fifth capacitor C22, a sixth capacitor C23, a second integrated operational amplifier U2B, and a second transistor U4. The sixth resistor R22 is electrically connected to the non-inverting input of the second integrated operational amplifier U2B. The output terminal of the second potentiometer W2 is electrically connected to the inverting input terminal of the second integrated operational amplifier U2B, and the fifth capacitor C22 is connected in parallel to the second potentiometer W2. The output end of the second integrated operational amplifier U2B is connected with an eighth resistor R25, a seventh resistor R24 and a sixth capacitor C23 are respectively connected in parallel with the second integrated operational amplifier U2B, and a tenth resistor R27 is electrically connected with the input end of the second triode U4. One end of the seventh capacitor C24 is connected to the eighth resistor R25, and the other end is connected to the output end of the second transistor U4. The output terminal of the second transistor U4 is electrically connected to the input terminal of the second optical signal output module 154.
Here, it should be noted that, when the signal of 0-5V converted by the integrator 150 is introduced into the signal detection board 150 by the first relay J1, in the second amplified signal module 153, the second integrated operational amplifier U2B compares the voltage across the second potentiometer W2 with the signal of 0-5V input in the signal detection board 150, and when the input signal is greater than the voltage across the second potentiometer W2, i.e., 3.75V, the second integrated operational amplifier U2B outputs a high level to the second optical signal output module 154.
In one possible implementation, the second optical signal output module 154 includes a second optical fiber transmitter Q2, a ninth resistor R26, a tenth resistor R27, an eighth capacitor C25, and a second diode DW 2. The output end of the second optical fiber transmitter Q2 is connected with a ninth resistor R26, the ninth resistor R26 is connected with a tenth resistor R27 in parallel, a tenth resistor R27 is electrically connected with the input end of a second diode DW2, the output end of the second diode DW2 is electrically connected with the input end of the second optical fiber transmitter Q2, and an eighth capacitor C25 is connected with the second optical fiber transmitter Q2 in parallel.
Here, it should be noted that when the second integrated operational amplifier U2B outputs a high level to the second optical signal output module 154, the second transistor U4 thereof turns on the second optical fiber transmitter Q2 to send out an optical signal, which indicates that the branch of the control loop is not turned on.
As shown in fig. 3, in a possible implementation, the signal detection board 150 further includes a power supply module 155, and the power supply module 155 includes a second relay J2, a three-terminal regulator LM7812, and a ninth capacitor C2. The output end of the second relay J2 is electrically connected with the input end of the three-terminal regulator LM7812, the output end of the three-terminal regulator LM7812 is connected with the ninth capacitor C2, and the other end of the ninth capacitor C2 is connected with the input end of the second relay J2.
Here, it should be noted that the 24V power of the signal detection board 150 is introduced by the second relay J2 and converted into 12V power by the three-terminal regulator LM7812 therein to be supplied to the signal detection board 150 for use.
In one possible implementation, the isolation transformer 110 is a 30KV isolation transformer, and the output signal thereof is transmitted by using an optical fiber. It should be noted that the isolation transformer 110 isolates the main loop from the control loop, so as to effectively improve the factors such as cable head explosion caused by electric shock, and the insulating ability of the system is enhanced by using optical fiber to transmit signals.
To sum up, the detection of the detection circuit in the embodiment of the present application is completed in a manner of optical signal transmission, when each branch is normally turned on, the signal output by the signal detection board 150 is a switching signal greater than 1.25V, when there is a branch that is not turned on, the signal output by the signal detection board 150 is a switching signal greater than 3.75V, that is, whether the branch is normally turned on is determined by detecting the switching value of the optical signal output by the current threshold, and the current peak value of each branch when discharge does not need to be detected, so that the safety of the control loop is ensured.
Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (7)
1. A high voltage pulse high current condition detection circuit, comprising: the device comprises an isolation transformer, an AC/DC power supply, a Rogowski coil, an integrator and a signal detection board;
the output end of the isolation transformer is electrically connected with the input end of the AC/DC power supply;
the AC/DC power output end is electrically connected with the input end of the signal detection plate;
the AC/DC power output end is also electrically connected with the input end of the integrator;
the input end of the integrator is also electrically connected with the output end of the Rogowski coil;
the output end of the integrator is electrically connected with the input end of the signal detection plate;
the signal detection board comprises a first amplified signal module, a first optical signal output module and a first relay;
the output end of the first relay is electrically connected with the input end of the first amplified signal module;
the output end of the first amplification signal module is electrically connected with the input end of the first optical signal.
2. The circuit for detecting the high-voltage pulsed large-current state according to claim 1, wherein the first amplified signal module comprises a first resistor, a second resistor, a third resistor, a first potentiometer, a first capacitor, a second capacitor, a third capacitor, a first integrated operational amplifier, and a first triode;
the first resistor is electrically connected with a non-inverting input end of the first integrated operational amplifier;
the output end of the first potentiometer is electrically connected with the inverting input end of the first integrated operational amplifier, and the first capacitor is connected with the first potentiometer in parallel;
the output end of the first integrated operational amplifier is electrically connected with the third resistor, the second resistor and the second capacitor are respectively connected with the first integrated operational amplifier in parallel, and the third resistor is electrically connected with the input end of the first triode;
one end of the third capacitor is connected with the third resistor, and the other end of the third capacitor is connected with the output end of the first triode;
the output end of the first triode is electrically connected with the input end of the first optical signal output module.
3. The high-voltage pulsed high-current state detection circuit according to claim 1, wherein the first optical signal output module comprises a first optical fiber transmitter, a fourth resistor, a fifth resistor, a fourth capacitor, a first diode;
the output end of the first optical fiber transmitter is connected with the fourth resistor, the fourth resistor is connected with the fifth resistor in parallel, the fifth resistor is electrically connected with the input end of the first diode, the output end of the first diode is electrically connected with the input end of the first optical fiber transmitter, and the fourth capacitor is connected with the first optical fiber transmitter in parallel.
4. The circuit for detecting the high-voltage pulsed large-current state according to claim 1, wherein the signal detection board further comprises a second amplified signal module, a second optical signal output module;
the second amplified signal module comprises a sixth resistor, a seventh resistor, an eighth resistor, a second potentiometer, a fifth capacitor, a sixth capacitor, a seventh capacitor, a second integrated operational amplifier and a second triode;
the sixth resistor is electrically connected with the non-inverting input end of the second integrated operational amplifier;
the output end of the second potentiometer is electrically connected with the inverting input end of the second integrated operational amplifier, and the fifth capacitor is connected with the second potentiometer in parallel;
the output end of the second integrated operational amplifier is connected with the eighth resistor, the seventh resistor and the sixth capacitor are respectively connected with the second integrated operational amplifier in parallel, and the eighth resistor is electrically connected with the input end of the second triode;
one end of the seventh capacitor is connected with the eighth resistor, and the other end of the seventh capacitor is connected with the output end of the second triode;
and the output end of the second triode is electrically connected with the input end of the second optical signal output module.
5. The circuit of claim 4, wherein the second optical signal output module comprises a second fiber transmitter, a ninth resistor, a tenth resistor, an eighth capacitor, and a second diode;
the output end of the second optical fiber transmitter is connected with the ninth resistor, the ninth resistor is connected with the tenth resistor in parallel, the tenth resistor is electrically connected with the input end of the second diode, the output end of the second diode is electrically connected with the input end of the second optical fiber transmitter, and the eighth capacitor is connected with the second optical fiber transmitter in parallel.
6. The high-voltage pulsed high-current condition detection circuit according to any one of claims 1 to 5, wherein the signal detection board further comprises a power supply module;
the power supply module comprises a second relay, a three-terminal voltage regulator and a ninth capacitor;
the output end of the second relay is electrically connected with the input end of the three-terminal voltage regulator;
the output end of the three-terminal voltage stabilizer is connected with the ninth capacitor;
and the other end of the ninth capacitor is connected with the input end of the second relay.
7. The high-voltage pulsed high-current state detection circuit according to any one of claims 1 to 5, wherein the isolation transformer is a 30KV isolation transformer, and an output signal of the isolation transformer is transmitted by using an optical fiber.
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| CN202220473104.4U CN217133258U (en) | 2022-03-04 | 2022-03-04 | High-voltage pulse heavy-current state detection circuit |
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| CN202220473104.4U CN217133258U (en) | 2022-03-04 | 2022-03-04 | High-voltage pulse heavy-current state detection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117723892A (en) * | 2024-02-06 | 2024-03-19 | 西安博源电气有限公司 | Cable fault detection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117723892A (en) * | 2024-02-06 | 2024-03-19 | 西安博源电气有限公司 | Cable fault detection system |
| CN117723892B (en) * | 2024-02-06 | 2024-05-28 | 西安博源电气有限公司 | Cable fault detection system |
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