CN114665702A - High-power constant-voltage constant-current power supply capable of resisting radio frequency interference - Google Patents
High-power constant-voltage constant-current power supply capable of resisting radio frequency interference Download PDFInfo
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- CN114665702A CN114665702A CN202210415776.4A CN202210415776A CN114665702A CN 114665702 A CN114665702 A CN 114665702A CN 202210415776 A CN202210415776 A CN 202210415776A CN 114665702 A CN114665702 A CN 114665702A
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- 229910052710 silicon Inorganic materials 0.000 claims abstract description 24
- 239000010703 silicon Substances 0.000 claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims abstract description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 22
- 239000013307 optical fiber Substances 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 5
- 230000004927 fusion Effects 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 210000002381 plasma Anatomy 0.000 description 3
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a high-power constant-voltage constant-current power supply capable of resisting radio frequency interference, which comprises a current sensor arranged between an input alternating current filter and a controlled silicon, a voltage sensor arranged between the controlled silicon and an output alternating current filter, wherein collected signals of the current sensor and the voltage sensor are connected with a controller; the transformer, the rectifier bridge and the feedthrough capacitor are sequentially connected and mounted in the signal shielding case. The invention can solve the problem that the sensor is interfered when exposed in a radio frequency environment because the signal is directly collected from the filament side of the electron tube. Meanwhile, the invention fully utilizes the internal space of the high-frequency cavity of the transmitter, and has simple structure and convenient installation.
Description
Technical Field
The invention relates to the field of radio frequency power amplification of an ion cyclotron wave heating system, in particular to a high-power constant-voltage constant-current power supply capable of resisting radio frequency interference.
Background
In the research of controlled nuclear fusion, in order to improve the temperature of plasma, high-power microwave and radio frequency wave are generally adopted to heat the plasma so as to reach the fusion temperature. Ion cyclotron resonance heating is one of the most effective auxiliary heating means in tokamak, can effectively heat various ions of plasmas, and is widely applied to various fusion devices in the world. The total power level of ion cyclotron resonance heating is generally as high as several megawatts to tens of megawatts, the working frequency is 10-200MHz, and the power of a single transmitter reaches 1.5 MW. The transmitter adopts a 6kW solid-state amplifier, a 100kW pre-stage amplifier, a 1.5MW final-stage amplifier and a three-stage amplification working mode, wherein the pre-stage amplifier and the final-stage amplifier both adopt high-power electronic tubes as power amplification devices. The electrodes of the electronic tube comprise an anode, a grid, a curtain grid and a filament electrode, and the four electrodes are all powered by respective independent power supplies. The filament pole of high-power electron tube needs great constant current (generally hundreds of A to thousands of A) to work, lead to supply cable diameter and hardness grow, the installation degree of difficulty and loss increase along with cable length increase, and bring a large amount of radio frequency interference along with filament current on the cable, overlength cable can make high frequency signal distribute everywhere and bring huge interference to transmitter control and acquisition system, consequently for reducing the cable junction length between power and the filament pole, the power is installed usually in the high frequency cavity of transmitter, this electromagnetic environment that also leads to filament power supply work is very abominable. The radio frequency signal in the high frequency cavity can lead to the signal superposition higher harmonic wave required by the power supply operation, so that various fault problems of the power supply can easily occur, and the transmitter can not work normally. The filament of the electron tube can reduce the electron emission capability along with the increase of the working time of the electron tube, so that the filament power supply can adjust the output voltage and current according to the actual working condition of the electron tube, and meanwhile, the stability of an output value is ensured. Therefore, a constant-voltage constant-current power supply which can reliably and stably operate in a strong radio frequency interference environment and has adjustable parameters is needed, and the problem of insufficient internal space of a high-frequency cavity is solved in the aspect of power supply size.
Disclosure of Invention
The invention aims to provide a constant-voltage constant-current power supply which can adjust output parameters according to actual needs and can stably run in a strong radio frequency interference environment to resist radio frequency interference, and a filament pole of a high-power electron tube can be stably and reliably powered by the power supply.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a high-power constant-voltage constant-current power supply capable of resisting radio frequency interference comprises an input alternating current filter, a current sensor, a silicon controlled rectifier, a voltage sensor, a controller, an optical fiber signal board, an output alternating current filter, a control shielding case, a rectifier bridge, a transformer, a feedthrough capacitor, a signal shielding case and a shielding cable; a current sensor is arranged between the input alternating current filter and the controlled silicon, a voltage sensor is arranged between the controlled silicon and the output alternating current filter, the collected signals of the current sensor and the voltage sensor are connected with a controller, the output end of the controller is connected with the input end of the controlled silicon, and an optical fiber signal board is connected with the controller and is responsible for signal communication with a transmitter; the transformer is connected with the output alternating current filter through a shielding cable, and a rectifier bridge is arranged between the transformer and the feedthrough capacitor; the output end of the feedthrough capacitor is connected with a filament of the electronic tube; the input alternating current filter, the current sensor, the controllable silicon, the voltage sensor, the controller, the optical fiber signal plate and the output alternating current filter are installed in a control shielding case, the transformer, the rectifier bridge and the feedthrough capacitor are installed in the signal shielding case, the control shielding case and the signal shielding case are installed at different positions, and the control shielding case, the rectifier bridge and the feedthrough capacitor are connected with the outside through shielding cables.
Furthermore, the control shielding case divides the inner area according to the radio frequency interference intensity, different areas are shielded by metal plates, and the input alternating current filter and the output alternating current filter are arranged in one area; the current sensor, the controllable silicon and the voltage sensor are arranged in one region; the controller is installed in one area; the optical fiber signal board is installed in one area, and the areas are connected with each other by a twisted pair shielding cable.
Furthermore, the controller collects current and voltage signals of the alternating current side of the power supply through a current sensor and a voltage sensor, converts the current and the voltage signals into voltage and current of the direct current side after calculation, and enables the voltage and the current output by the power supply to be the same as a set value by controlling the conduction angle of the silicon controlled rectifier.
Further, the current and voltage signals are communicated with an upper computer through optical fiber transmission by adopting voltage-frequency conversion; the control signal is transmitted by a feed-through connector, and the direct current output is connected with the outside by a feed-through capacitor.
The invention has the advantages that:
the invention can solve the problem that the sensor is interfered when exposed in a radio frequency environment because the signal is directly collected from the filament side of the electron tube. Meanwhile, the invention has simple structure, fully utilizes the internal space of the high-frequency cavity of the transmitter, is convenient to install and implement, and is applied to an EAST radio frequency heating system of a large-scale superconducting Tokamak nuclear fusion experimental device.
Drawings
Fig. 1 is a schematic diagram of a high-power constant-voltage constant-current power supply with radio frequency interference resistance according to the present invention.
Wherein: the device comprises an input alternating current filter 1, a current sensor 2, a controllable silicon 3, a voltage sensor 4, a controller 6, an optical fiber signal plate 7, an output alternating current filter 5, a control shielding case 8, a signal shielding case 9, a transformer 10, a rectifier bridge 11, a feedthrough capacitor 12 and a shielding cable 13.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention 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 invention and are not intended to limit the invention. In addition, the technical features involved in the respective embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the high-power constant-voltage constant-current power supply with high resistance to radio frequency interference of the present invention includes an input ac filter 1, a current sensor 2, a thyristor 3, a voltage sensor 4, an optical fiber signal board 7, a controller 6, an output ac filter 5, a control shielding case 8, a transformer 10, a rectifier bridge 11, a feedthrough capacitor 12, a signal shielding case 9, and a shielding cable 13. Install current sensor 2 between input AC filter 1 and the silicon controlled rectifier 3, install voltage sensor 4 between silicon controlled rectifier 3 and the output AC filter 5, current sensor 2 and voltage sensor 4's collection signal links to each other with controller 6, and the output of controller 6 links to each other with the 3 input of silicon controlled rectifier, and optic fibre signal board 7 links to each other with controller 6, is responsible for the signal communication between with the transmitter. The input alternating current filter 1, the current sensor 2, the controllable silicon 3, the voltage sensor 4, the optical fiber signal plate 7, the controller 6 and the output alternating current filter 5 are installed in the control shielding case 8 in different regions; the transformer 10 is connected with the output AC filter 5 through a shielded cable 13, and a rectifier bridge 11 is arranged between the transformer 10 and the feedthrough capacitor 12. The output end of the feedthrough capacitor 12 is connected to the filament of the electron tube. The input alternating current filter 1, the current sensor 2, the controllable silicon 3, the voltage sensor 4, the controller 6, the optical fiber signal plate 7 and the output alternating current filter 5 are installed in a control shielding case, the rectifier bridge 11, the transformer 10 and the feedthrough capacitor 12 are installed in the signal shielding case, the control shielding case and the signal shielding case are installed at different positions according to actual needs, and the control shielding case and the signal shielding case are connected with the outside through shielding cables.
The control shielding case divides the inner area according to the radio frequency interference intensity, different areas are shielded by metal plates, and the input alternating current filter 1 and the output alternating current filter 5 are arranged in one area; the current sensor 2, the controllable silicon 3 and the voltage sensor 4 are arranged in one region; the controller 6 is installed in one area; the optical fiber signal boards 7 are installed in one area and connected to each other with a shielded twisted pair cable.
The principle of the invention is as follows:
because the filament power supply of the high-power transmitter can only be arranged in the high-frequency cavity and can be subjected to strong radio frequency interference during high-power output, the filament power supply has enough radio frequency interference resistance on the premise of ensuring the output stability. All collected signals and control devices of the power supply are shielded in a centralized mode, when the change of direct current output voltage and current of the power supply is coupled to the primary alternating current side through the transformer 10 in a transformation ratio mode, the controller 6 collects the primary voltage and current and compares the primary voltage and current with set values, and then the stability of an output value is guaranteed by controlling the size of a conduction angle of the controllable silicon 3. The current and voltage signals are communicated with an upper computer through optical fiber transmission by adopting voltage-frequency conversion; the control signal is transmitted by a feed-through connector, and the direct current output is connected with the outside by a feed-through capacitor 12.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. A high-power constant voltage and constant current power supply capable of resisting radio frequency interference is characterized in that: the system comprises an input alternating current filter, a current sensor, a silicon controlled rectifier, a voltage sensor, a controller, an optical fiber signal plate, an output alternating current filter, a control shielding case, a rectifier bridge, a transformer, a feedthrough capacitor, a signal shielding case and a shielding cable; a current sensor is arranged between the input alternating current filter and the controlled silicon, a voltage sensor is arranged between the controlled silicon and the output alternating current filter, collected signals of the current sensor and the voltage sensor are connected with a controller, the output end of the controller is connected with the input end of the controlled silicon, and an optical fiber signal board is connected with the controller and is responsible for signal communication with a transmitter; the transformer is connected with the output alternating current filter through a shielding cable, and a rectifier bridge is arranged between the transformer and the feedthrough capacitor; the output end of the feedthrough capacitor is connected with a filament of the electronic tube; the input alternating current filter, the current sensor, the controllable silicon, the voltage sensor, the controller, the optical fiber signal board and the output alternating current filter are installed in the control shielding case, the transformer, the rectifier bridge and the feedthrough capacitor are installed in the signal shielding case, the control shielding case and the signal shielding case are installed at different positions, and the control shielding case, the rectifier bridge and the signal shielding case are connected with the outside through shielding cables.
2. The high-power constant-voltage constant-current power supply capable of resisting radio frequency interference according to claim 1, wherein: the control shielding case divides the inner area according to the radio frequency interference intensity, different areas are shielded by metal plates, and the input alternating current filter and the output alternating current filter are arranged in one area; the current sensor, the controllable silicon and the voltage sensor are arranged in one region; the controller is installed in one area; the optical fiber signal board is installed in one area, and the areas are connected with each other by a twisted pair shielding cable.
3. The high-power constant-voltage constant-current power supply capable of resisting radio frequency interference according to claim 1, wherein: the controller collects voltage and current signals of the alternating current side of the power supply through the current sensor and the voltage sensor, converts the voltage and current signals into voltage and current of the direct current side after calculation, and enables the voltage and current output by the power supply to be the same as a set value by controlling the conduction angle of the controlled silicon.
4. The high-power constant-voltage constant-current power supply capable of resisting radio frequency interference according to claim 3, wherein: the voltage and the power retention signal are communicated with an upper computer through optical fiber transmission by adopting voltage-frequency conversion; the control signal is transmitted by a feed-through connector, and the direct current output is connected with the outside by a feed-through capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210415776.4A CN114665702B (en) | 2022-04-20 | 2022-04-20 | High-power constant-voltage constant-current power supply resistant to radio frequency interference |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210415776.4A CN114665702B (en) | 2022-04-20 | 2022-04-20 | High-power constant-voltage constant-current power supply resistant to radio frequency interference |
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| CN114665702A true CN114665702A (en) | 2022-06-24 |
| CN114665702B CN114665702B (en) | 2024-06-11 |
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2022
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| CN114665702B (en) | 2024-06-11 |
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