CN113644633A - Travelling wave tube high-voltage power supply protection circuit and method thereof - Google Patents
Travelling wave tube high-voltage power supply protection circuit and method thereof Download PDFInfo
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- CN113644633A CN113644633A CN202110753244.7A CN202110753244A CN113644633A CN 113644633 A CN113644633 A CN 113644633A CN 202110753244 A CN202110753244 A CN 202110753244A CN 113644633 A CN113644633 A CN 113644633A
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- 238000000034 method Methods 0.000 title claims description 8
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 230000005669 field effect Effects 0.000 claims description 7
- 238000002955 isolation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
- H02H7/1252—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers responsive to overvoltage in input or output, e.g. by load dump
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
- H02H7/1257—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers responsive to short circuit or wrong polarity in output circuit
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a traveling wave tube high-voltage power supply protection circuit, which comprises: the high-voltage power supply comprises a switch circuit, a rectification rear-stage voltage and current acquisition circuit, a high-voltage output side current acquisition circuit and a protection circuit, wherein the rectification rear-stage voltage and current acquisition circuit acquires rectification voltage and current signals after EMI filtering and alternating current rectification and sends the rectification voltage and current signals to the protection circuit, the high-voltage output side current acquisition circuit acquires high-voltage output side current signals after high-frequency switching and high-voltage boosting rectification filtering and sends the high-voltage output side current signals to the protection circuit, the protection circuit analyzes the rectification rear-stage voltage and current signals and the high-voltage output side current signals, the EMI filtering circuit and the rectification circuit are cut off or connected in through a control switch circuit, and the high-voltage power supply is disconnected or connected into the high-voltage power supply input. The invention can realize input overcurrent and overvoltage protection, high-voltage output overcurrent protection and quick response.
Description
Technical Field
The invention belongs to the technical field of high-voltage power supplies, and particularly relates to a traveling wave tube high-voltage power supply protection circuit and a method thereof.
Background
With the rapid development of semiconductor power devices, the use requirements of industrial products are gradually increased, high-voltage power supplies are developed towards miniaturization, the environment of electromagnetic interference is more and more complex, and the requirements of high-voltage power supply protection circuits are more and more strict. Aiming at the protection requirement of a high-voltage power supply, the high-frequency and soft switching technology of the high-voltage power supply is continuously developed and innovated, the electromagnetic environment is more complex, and the development of a high-voltage protection circuit is more mature, wherein the high-voltage ignition protection circuit is a classical circuit structure for protecting the high-voltage power supply. However, in the high-voltage power supply, since the distribution parameters such as the distributed capacitance and the leakage inductance of the high-voltage transformer and the parasitic parameters of the high-voltage power device are large, the electromagnetic environment is complex, the high-voltage ignition protection circuit protects the controller, the input power supply is not cut off, other devices still have energy, and the device level damage is easily caused by the interference of the control panel.
Disclosure of Invention
The invention aims to provide a traveling wave tube high-voltage power supply protection circuit and a method thereof.
The technical solution for realizing the purpose of the invention is as follows: a traveling wave tube high-voltage power supply protection circuit comprises: the high-voltage power supply comprises a switch circuit, a rectification rear-stage voltage and current acquisition circuit, a high-voltage output side current acquisition circuit and a protection circuit, wherein the rectification rear-stage voltage and current acquisition circuit acquires rectification voltage and current signals after EMI filtering and alternating current rectification and sends the rectification voltage and current signals to the protection circuit, the high-voltage output side current acquisition circuit acquires high-voltage output side current signals after high-frequency switching and high-voltage boosting rectification filtering and sends the high-voltage output side current signals to the protection circuit, the protection circuit analyzes the rectification rear-stage voltage and current signals and the high-voltage output side current signals, the EMI filtering circuit and the rectification circuit are cut off or connected in through a control switch circuit, and the high-voltage power supply is disconnected or connected into the high-voltage power supply input.
Further, the switch circuit adopts an N-type field effect transistor.
Further, the rectification rear-stage voltage and current acquisition circuit 2 acquires input current by connecting a resistor in series with the rectification rear-stage positive voltage circuit; the input voltage is acquired by setting a voltage division network at the positive voltage and the negative voltage of the rectification post stage.
Furthermore, the high-voltage output side current acquisition circuit is provided with a Hall sensor outside a positive voltage circuit on the high-voltage output side to acquire high-voltage output current.
Furthermore, any one of the collected signal of the rectification rear-stage voltage and current collecting circuit and the high-voltage output side current collecting circuit exceeds a threshold value, the protection circuit immediately cuts off the switch circuit, and meanwhile, the high-voltage power supply input and output circuit is protected.
A traveling wave tube high-voltage power supply protection method is based on the traveling wave tube high-voltage power supply protection circuit to achieve traveling wave tube high-voltage power supply protection.
A traveling wave tube is provided with the traveling wave tube high-voltage power supply protection circuit.
Compared with the prior art, the invention has the following remarkable advantages: 1) and (3) redundancy design of the ignition protection circuit: the high-voltage power supply protection circuit of the traveling wave tube is an extension circuit of the ignition protection circuit, and the input power supply is cut off while the ignition protection circuit switches off the switch controller, so that the high-voltage power supply is further protected. 2) Internal integrated voltage and current acquisition circuit: the voltage and current acquisition circuit is integrated in the traveling wave tube high-voltage power supply protection circuit, the current working state can be quantitatively analyzed, and an external controller can process and analyze data acquired by the traveling wave tube high-voltage power supply protection circuit through related communication protocols. 3) Fast protection: the high-voltage power supply protection circuit of the traveling wave tube controls the high-voltage N-type field effect transistor, can quickly cut off the input of a high-voltage power supply, has microsecond time level, and improves the reliability of the high-voltage power supply.
Drawings
Fig. 1 is a schematic block diagram of a high-voltage protection circuit of a traveling wave tube according to the present invention.
Fig. 2 is a schematic block diagram of the rectified post-stage voltage and current acquisition portion of the present invention.
Fig. 3 is a functional block diagram of a portion of the protection circuit of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
As shown in fig. 1, the traveling wave tube of the present invention includes: rectifier circuit, EMI filter circuit, switch circuit 1, rectification back level voltage and current acquisition circuit 2, high frequency switch circuit, high-pressure rectification filter circuit, high-pressure output current acquisition circuit 3 and protection circuit 4, wherein: the switch circuit 1, the rectification post-stage voltage and current acquisition circuit 2, the high-voltage output current acquisition circuit 3 and the protection circuit 4 form a traveling wave tube high-voltage power supply protection circuit.
The rectification post-stage voltage and current acquisition circuit 2 acquires alternating current rectification output voltage and current after EMI filtering, and sends acquired signals to the protection circuit 4.
The high-voltage output current acquisition circuit 3 acquires high-voltage output current through the Hall sensor and sends the acquired signal to the protection circuit 4.
The protection circuit 4 analyzes all the collected signals and controls the on and off of the high-voltage N-type field effect transistor 11 in the switch circuit 1.
As shown in fig. 2, the rectification post-stage voltage and current collecting circuit 2 of the present invention is a voltage equal proportion collecting circuit and a power supply positive terminal current collecting circuit, and includes:
the resistor 21 is a high-precision low-resistance sampling resistor, and a rectification post-stage circuit flows through the resistor 21 to generate voltage drop, namely a current acquisition signal; the resistor 22 is a high-resistance precision resistor and the resistor 23 is a low-resistance precision resistor, the rectification post-stage circuit divides voltage through the resistor 12 and the resistor 13, and the voltage at the joint of the resistor 12 and the resistor 13 is a voltage acquisition signal.
As shown in fig. 3, the protection circuit 4 of the present invention includes: a high voltage isolation type switch controller 41. The high voltage isolation type switch controller 41 is exemplified by LTM9100 high voltage isolation type switch controller of ANALOG DEVICES corporation. The high-voltage isolation type switch controller 41 collects a rectified post-stage voltage signal, a rectified post-stage current signal and a high-voltage output current signal, any signal exceeds a threshold value in the working process, and the high-voltage isolation type switch controller 41 cuts off the high-voltage N-type field effect transistor 11 so as to cut off the input of a high-voltage power supply. The high-voltage isolation type switch controller 41 is provided with an external interface, and the external controller can monitor and control the input voltage, the current and the output current of the high-voltage power supply through an I2C interface and an external enabling signal interface.
The high-voltage protection circuit of the traveling wave tube collects rectified post-stage voltage and current signals and high-voltage output side current signals. When the rectified post-stage voltage and current signals exceed threshold values, the traveling wave tube high-voltage power supply protection circuit cuts off an input loop; when the current of the high-voltage output side exceeds a threshold value, the filament protection circuit and the traveling wave tube high-voltage power supply protection circuit work immediately, the filament protection circuit cuts off the high-frequency switch circuit to protect the power device, and the traveling wave tube high-voltage power supply protection circuit cuts off the input of the high-voltage power supply to protect the rear stage. The high-voltage power supply protection circuit of the traveling wave tube is a redundant design of the ignition protection circuit, and a voltage and current acquisition circuit is integrated inside the high-voltage power supply protection circuit, so that the high-voltage power supply protection circuit has a quick protection function and the reliability of the high-voltage power supply is improved.
In summary, the present invention collects the rectified post-stage voltage and current to monitor the working state of the input side in real time, and simultaneously collects the circuit current of the high-voltage output side to monitor the working state of the high-voltage output side in real time. When the current of the rectification rear-stage circuit is over-current or the voltage is over-voltage, the high-voltage power supply protection circuit controls the high-voltage N-type field effect transistor to be turned off, and the voltage output of the rectification rear-stage circuit is cut off; when the current of the high-voltage output side circuit is overcurrent, the high-voltage power supply protection circuit controls the high-voltage N-type field effect transistor to be turned off, and the voltage output of the rectification post-stage circuit is cut off; the two working conditions can meet any one, the high-voltage power supply protection circuit works immediately to realize the protection of the rectification post-stage circuit of the high-voltage power supply, and the reliability of the high-voltage power supply is improved.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A traveling wave tube high-voltage power supply protection circuit is characterized by comprising: switch circuit (1), rectification back-stage voltage and current acquisition circuit (2), high-pressure output side current acquisition circuit (3) and protection circuit (4), rectification voltage and current signal after EMI filtering and interchange rectification are gathered to rectification back-stage voltage and current acquisition circuit (2), give protection circuit (4), high-pressure output side current acquisition circuit (3) gather the high-pressure output side current signal after high frequency switch and high-pressure boost rectification filter, give protection circuit (4), protection circuit (4) are to rectification back-stage voltage and current signal, high-pressure output side current signal analysis, cut off or insert EMI filter circuit and rectifier circuit through control switch circuit (1), disconnection or insert high voltage power input.
2. The traveling wave tube high-voltage power supply protection circuit according to claim 1, characterized in that the switch circuit (1) adopts an N-type field effect transistor.
3. The traveling wave tube high-voltage power supply protection circuit according to claim 1, wherein the rectification post-stage voltage and current acquisition circuit (2) acquires input current by connecting a resistor in series with a rectification post-stage positive voltage circuit; the input voltage is acquired by setting a voltage division network at the positive voltage and the negative voltage of the rectification post stage.
4. The traveling wave tube high-voltage power supply protection circuit according to claim 1, wherein the high-voltage output side current collection circuit (3) collects the high-voltage output current by arranging a hall sensor outside a high-voltage output side positive voltage line.
5. The traveling wave tube high-voltage power supply protection circuit according to claim 1, wherein when any one of the rectified post-stage voltage and current acquisition circuit (2) and the high-voltage output side current acquisition circuit (3) acquires a signal exceeding a threshold value, the protection circuit (4) immediately turns off the switch circuit (1) and simultaneously protects the high-voltage power supply input and output circuits.
6. A traveling wave tube high-voltage power supply protection method is characterized in that traveling wave tube high-voltage power supply protection is achieved based on the traveling wave tube high-voltage power supply protection circuit of any one of claims 1 to 5.
7. A traveling wave tube, wherein the traveling wave is provided with the traveling wave tube high voltage power supply protection circuit according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110753244.7A CN113644633A (en) | 2021-07-02 | 2021-07-02 | Travelling wave tube high-voltage power supply protection circuit and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110753244.7A CN113644633A (en) | 2021-07-02 | 2021-07-02 | Travelling wave tube high-voltage power supply protection circuit and method thereof |
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| CN113644633A true CN113644633A (en) | 2021-11-12 |
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| CN202110753244.7A Pending CN113644633A (en) | 2021-07-02 | 2021-07-02 | Travelling wave tube high-voltage power supply protection circuit and method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4323853A (en) * | 1979-02-23 | 1982-04-06 | Nippon Electric Co., Ltd. | Circuit for protecting traveling-wave tubes against faults of a power supply |
| KR20050063088A (en) * | 2003-12-22 | 2005-06-28 | 넥스원퓨처 주식회사 | Protective circuit of high voltage power supply |
| CN101106269A (en) * | 2007-08-14 | 2008-01-16 | 冯建湘 | Fire protection device for row wave pipe |
| KR20130016735A (en) * | 2011-08-05 | 2013-02-19 | 엘아이지넥스원 주식회사 | Apparatus for protecting high voltage power supply |
| CN203415537U (en) * | 2013-08-27 | 2014-01-29 | 中国电子科技集团公司第四十四研究所 | Travelling wave tube with electric-spark detection device |
| CN108512406A (en) * | 2018-03-07 | 2018-09-07 | 中国船舶重工集团公司第七二三研究所 | A kind of anti-arc protect circuit of travelling-wave tubes high voltage power supply |
| CN212908972U (en) * | 2020-05-28 | 2021-04-06 | 合肥雷科电子科技有限公司 | Ignition protection device for power supply of ultra-high voltage traveling wave tube |
-
2021
- 2021-07-02 CN CN202110753244.7A patent/CN113644633A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4323853A (en) * | 1979-02-23 | 1982-04-06 | Nippon Electric Co., Ltd. | Circuit for protecting traveling-wave tubes against faults of a power supply |
| KR20050063088A (en) * | 2003-12-22 | 2005-06-28 | 넥스원퓨처 주식회사 | Protective circuit of high voltage power supply |
| CN101106269A (en) * | 2007-08-14 | 2008-01-16 | 冯建湘 | Fire protection device for row wave pipe |
| KR20130016735A (en) * | 2011-08-05 | 2013-02-19 | 엘아이지넥스원 주식회사 | Apparatus for protecting high voltage power supply |
| CN203415537U (en) * | 2013-08-27 | 2014-01-29 | 中国电子科技集团公司第四十四研究所 | Travelling wave tube with electric-spark detection device |
| CN108512406A (en) * | 2018-03-07 | 2018-09-07 | 中国船舶重工集团公司第七二三研究所 | A kind of anti-arc protect circuit of travelling-wave tubes high voltage power supply |
| CN212908972U (en) * | 2020-05-28 | 2021-04-06 | 合肥雷科电子科技有限公司 | Ignition protection device for power supply of ultra-high voltage traveling wave tube |
Non-Patent Citations (1)
| Title |
|---|
| 朱元江;王磊;刘禹;: "一种星载脉冲行波管高压电源的设计", 舰船电子对抗, no. 01 * |
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