CN211702517U - Filament power supply device and low-energy electron accelerator - Google Patents
Filament power supply device and low-energy electron accelerator Download PDFInfo
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- CN211702517U CN211702517U CN202020164940.5U CN202020164940U CN211702517U CN 211702517 U CN211702517 U CN 211702517U CN 202020164940 U CN202020164940 U CN 202020164940U CN 211702517 U CN211702517 U CN 211702517U
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Abstract
The application discloses filament power supply unit includes: the filament power supply and the filament are suspended at the high-voltage output end of the high-voltage power supply; the sampling module is arranged between the high-voltage power supply and the load and used for collecting current load current; and the controller is respectively connected with the sampling module and the filament power supply and used for controlling the filament current of the filament power supply according to the current load current so as to enable the current load current to reach the target load current. This application can provide the required power of filament of low energy electron accelerator load electron gun, and response speed is fast, and control efficiency is high, guarantees the stability and the reliability of filament power supply unit's output, compares in prior art, and this application need not adopt the generator independent power supply, and the fortune dimension is with low costs. The application also discloses a low-energy electron accelerator which has the beneficial effects.
Description
Technical Field
The present disclosure relates to electron accelerators, and more particularly, to a filament power supply device and a low-energy electron accelerator.
Background
The industrial irradiation electron accelerator is an electron accelerator device mainly used for irradiating various materials, participating in chemical reactions, performing sterilization and other industrial production processes. The electron gun is mounted on the top of the accelerating tube and is at the highest potential of the accelerator. To supply power to the electron gun filament at high potential, two approaches are generally taken: one is to supply energy to the electron gun heating loop at high potential by capacitive coupling, and the disadvantage is that if the terminal voltage of the accelerator needs to be changed frequently with the irradiation task, when the accelerator is operated at low voltage (low energy section), the voltage generated by electromagnetic coupling may be too low, resulting in insufficient heating current of the electron gun and limiting the maximum output current; the other is independently powered by a generator, so that the generator is not influenced by high voltage, and has the defect of long-term high-speed operation parts, which belong to wearing parts and need to be replaced periodically.
Therefore, how to provide a solution to the above technical problem is a problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The filament power supply device is capable of providing power required by a filament of a low-energy electron accelerator load electron gun, high in response speed and control efficiency, capable of ensuring the stability and reliability of the output of the filament power supply device, free of independent power supply of a generator and low in operation and maintenance cost; it is another object of the present application to provide a low energy electron accelerator including the above filament supply apparatus.
In order to solve the above technical problem, the present application provides a filament power supply device, including:
the filament power supply and the filament are suspended at the high-voltage output end of the high-voltage power supply;
the sampling module is arranged between the high-voltage power supply and the load and used for collecting current load current;
and the controller is respectively connected with the sampling module and the filament power supply and used for controlling the filament current of the filament power supply according to the current load current so as to enable the current load current to reach the target load current.
Preferably, the controller is specifically a controller that obtains a current filament current of the filament power supply.
Preferably, the filament power supply device further includes:
and the monitoring module is connected with the controller and used for prompting the information corresponding to the current filament current and the information corresponding to the current load current.
Preferably, the controller and the monitoring module are connected by an optical fiber.
Preferably, the monitoring module is connected with the high-voltage power supply through RS 485.
Preferably, the filament power supply device further includes:
and the high-voltage isolation module is arranged between the monitoring module and the filament power supply.
Preferably, the high voltage isolation module comprises an isolation transformer.
Preferably, the filament power supply comprises a rectifying and filtering module, a half-bridge inverter module, a synchronous rectifying module and an output module which are connected in sequence, wherein:
the input end of the rectification filtering module is connected with the high-voltage output end of the high-voltage power supply, and the output end of the output module is connected with the lamp filament.
In order to solve the above technical problem, the present application further provides a low-energy electron accelerator, including the filament power supply apparatus as described in any one of the above.
The application provides a filament power supply unit, filament power and filament suspension set up in high voltage power supply's high voltage output, so that the required power of filament of low energy electron accelerator load electron gun is provided, sampling module locates between high voltage power and the load, so that sampling module acquires current load current, the controller is connected with the sampling module electricity, so that the controller carries out closed-loop control to the filament current of filament power output according to current load current, so that current load current reaches the target load current, response speed is fast, control efficiency is high, guarantee the stability and the reliability of filament power supply unit's output, compare in prior art, this application need not adopt the independent power supply of generator, fortune dimension is with low costs. The application also provides a low-energy electron accelerator which has the same beneficial effect as the filament power supply device.
Drawings
In order to more clearly illustrate the embodiments of the present application, the drawings needed for the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a schematic structural diagram of a filament power supply apparatus provided in the present application;
fig. 2 is a schematic structural diagram of a filament power supply provided in the present application.
Detailed Description
The core of the application is to provide a filament power supply device, which can provide the power required by the filament of a low-energy electron accelerator load electron gun, has high response speed and high control efficiency, ensures the stability and reliability of the output of the filament power supply device, does not need to adopt a generator to supply power independently, and has low operation and maintenance cost; another core of the present application is to provide a low-energy electron accelerator including the above filament power supply apparatus.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a filament power supply apparatus provided in the present application, the filament power supply apparatus includes:
the high-voltage power supply 1 and the filament power supply 2, and the filament power supply 2 and the filament are suspended at the high-voltage output end of the high-voltage power supply 1;
the sampling module 3 is arranged between the high-voltage power supply 1 and a load and is used for collecting the current load current;
and the controller 4 is respectively connected with the sampling module 3 and the filament power supply 2 and is used for controlling the filament current of the filament power supply 2 according to the current load current so as to enable the current load current to reach the target load current.
Specifically, the filament power supply device provided by the application can specifically comprise a controller 4, a high-voltage power supply 1, a filament power supply 2, an electron gun, an accelerating tube, a main steel cylinder and other components, wherein the filament power supply 2, the high-voltage power supply 1, the accelerating tube and the electron gun are installed in the sealed accelerator steel cylinder together and are filled with inert gas for insulation.
Wherein, high voltage power supply 1 is the boost tower part promptly, and filament power supply 2 is independent, and filament power supply 2 is used for supplying power for the filament, and filament power supply 2 adopts suspension high voltage to set up in this application, specifically links to each other with high voltage power supply 1 output through filament power supply 2's low pressure end and realizes suspension high voltage and set up to provide the required mains power of low energy electron accelerator load electron gun filament. The suspension high voltage is that the filament power supply 2 and the filament are suspended at the high voltage end output by the high voltage power supply 1, the low voltage end of the filament power supply 2 is connected with the voltage of the ground, namely the output voltage of the high voltage power supply 1, and the low voltage end of the filament power supply 2 connected with the high voltage end of the filament is +5V (the filament power supply 2 is DC 0-5V).
Specifically, the load current control is realized by adjusting the filament current, the controller 4 performs PID operation on the load current collected by the sampling module 3 and the target load current pre-stored in the controller 4 to obtain a target filament current value, and the PWM signal for controlling the switching tube in the filament power supply 2 is adjusted according to the target filament current value to realize the filament current control, thereby realizing the control of the load current.
Further, the filament power supply 2 is controlled and isolated by adopting optical fibers, the main power is isolated by adopting a dry-type high-voltage transformer, the high-voltage isolation transformer adopts a special customized structure and adopts a medium-high frequency inversion technology, and the control end is isolated by adopting optical fibers. The sampling module 3 can be specifically an optical isolation sampling module, and an isolation power supply of the optical isolation sampling module is provided by an auxiliary winding of a high-voltage isolation transformer. The isolation transformer of the filament power supply 2 is arranged at the top of the sealing steel structure, the low-voltage end is arranged at the top, the output is arranged at the lower end, the optical isolation sampling circuit is also arranged at the lower end, the insulation mode adopts silicon rubber encapsulation, the heat dissipation mode adopts forced air cooling, and the fan is arranged at the lowest end of the device.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a filament power supply 2 provided in the present application, where the filament power supply 2 may include a rectifying and filtering module, a half-bridge inverter module, a synchronous rectifying module, and an output module. Specifically, the rectifying and filtering module includes a first resistor R1, a second resistor R2, a first capacitor C1 and a second capacitor C2, the half-bridge inverter module includes a first switch Q1, a second switch Q2 and a transformer T1, the synchronous rectifying module includes a third switch Q3 and a fourth switch Q4, the output module includes an inductor L, a third capacitor C3 and a load RL, wherein:
a first end of a first resistor R1 is connected with a first end of a first capacitor C1 and a first end of a first switching tube Q1 respectively, a common tube of the first resistor R1 is used as an input end Vin of the filament power supply 2, a second end of the first resistor R1 is connected with a first end of a second resistor R2, a first end of a second capacitor C2, a second end of a first capacitor C1 and a second end of a primary side of a transformer T1 respectively, a second end of the first switching tube Q1 is connected with a first end of a second switching tube Q2 and a first end of a primary side of a transformer T1 respectively, a second end of a second resistor R2, a second end of a second capacitor C2 and a second end of a primary side of the second switching tube Q6329 are all grounded, a third end of a secondary side of the transformer T1 is connected with a first end of a third switching tube Q3 and a driving end of a fourth switching tube Q4 respectively, a fifth end of a secondary side of a transformer T1 is connected with a third end of a third switching tube 46q 48 and a fourth end Q5, and a fourth end of a fourth switching tube Q4 are connected with a fourth end, The second end of the third capacitor C3 and the second end of the load RL are connected, the fourth end of the transformer T1 is connected to the first end of the inductor L, and the second end of the inductor L is connected to the first end of the third capacitor C3 and the second end of the load RL, respectively, wherein the fourth end of the transformer T1 is a common end of the two secondary windings of the transformer T1.
It can be understood that the PWM signal outputted by the controller 4 is used to control the first switching tube Q1 and the second switching tube Q2 in the half-bridge inverter module to be turned on or off, so as to control the filament current outputted by the filament power supply 2.
The application provides a filament power supply unit, filament power and filament suspension set up in high voltage power supply's high voltage output, so that the required power of filament of low energy electron accelerator load electron gun is provided, sampling module locates between high voltage power and the load, so that sampling module acquires current load current, the controller is connected with the sampling module electricity, so that the controller carries out closed-loop control to the filament current of filament power output according to current load current, so that current load current reaches the target load current, response speed is fast, control efficiency is high, guarantee the stability and the reliability of filament power supply unit's output, compare in prior art, this application need not adopt the independent power supply of generator, fortune dimension is with low costs.
On the basis of the above-described embodiment:
as a preferred embodiment, the controller 4 is embodied as a controller 4 which derives the present filament current of the filament power supply 2.
As a preferred embodiment, the filament power supply device further includes:
and the monitoring module 5 is connected with the controller 4 and used for prompting the information corresponding to the current filament current and the information corresponding to the current load current.
As a preferred embodiment, the controller 4 and the monitoring module 5 are connected by optical fibers.
In a preferred embodiment, the monitoring module 5 and the high voltage power supply 1 are connected through RS 485.
Specifically, the monitoring module 5 provided by the application comprises a ProfiNet-to-RS 485 unit, an electro-optical and photoelectric conversion unit and the like, and the monitoring module 5 is connected with the controller 4 through an optical fiber to realize control and state monitoring of the high-voltage suspended filament power supply 2; meanwhile, the monitoring module 5 can also control and monitor the state of the high-voltage power supply 1 through an RS485 interface.
Specifically, the controller 4 outputs the obtained current filament current and/or current load current to the monitoring module 5 through the optical fiber, so that the monitoring module 5 prompts information corresponding to the current filament current and information corresponding to the current load current.
Specifically, the monitoring module 5 sets the load voltage and the load current through RS485 communication to realize control of the output state of the filament power supply.
As a preferred embodiment, referring to fig. 1, the filament power supply apparatus further includes:
and the high-voltage isolation module 6 is arranged between the monitoring module 5 and the filament power supply 2.
As a preferred embodiment, the high voltage isolation module 6 comprises an isolation transformer.
Specifically, the high-voltage isolation module 6 adopts an isolation transformer, the magnetic core skeleton structure of the isolation transformer is manufactured by 3D printing, installation and fixation are completed, and the isolation transformer is formed by silicon rubber encapsulation and can meet the requirement of 250kV high-voltage electrical isolation. Specifically, the lamp filament power supply 2 supplies power to the high-voltage isolation module 6, so that the high-voltage isolation module 6 can realize the function of the high-voltage isolation module, a power supply device does not need to be arranged for the high-voltage isolation module 6 independently, and the hardware cost is reduced.
In another aspect, the present application also provides a low energy electron accelerator comprising a filament supply as in any of the above.
The low-energy electron accelerator has the same beneficial effects as the filament power supply device.
For the description of the low-energy electron accelerator provided in the present application, please refer to the above embodiments, which are not repeated herein.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A filament power supply apparatus, comprising:
the filament power supply and the filament are suspended at the high-voltage output end of the high-voltage power supply;
the sampling module is arranged between the high-voltage power supply and the load and used for collecting current load current;
and the controller is respectively connected with the sampling module and the filament power supply and used for controlling the filament current of the filament power supply according to the current load current so as to enable the current load current to reach the target load current.
2. The filament power supply arrangement according to claim 1, wherein the controller is in particular a controller that obtains a present filament current of the filament power supply.
3. The filament power supply apparatus according to claim 2, further comprising:
and the monitoring module is connected with the controller and used for prompting the information corresponding to the current filament current and the information corresponding to the current load current.
4. The filament power supply of claim 3, wherein the controller and the monitoring module are connected by optical fibers.
5. The filament power supply device according to claim 3, wherein the monitoring module and the high voltage power supply are connected through RS 485.
6. The filament power supply apparatus according to claim 3, further comprising:
and the high-voltage isolation module is arranged between the monitoring module and the filament power supply.
7. The filament power supply of claim 6, wherein the high voltage isolation module comprises an isolation transformer.
8. The filament power supply device according to any one of claims 1 to 7, wherein the filament power supply comprises a rectifying and filtering module, a half-bridge inverter module, a synchronous rectifying module and an output module, which are connected in sequence, wherein:
the input end of the rectification filtering module is connected with the high-voltage output end of the high-voltage power supply, and the output end of the output module is connected with the lamp filament.
9. A low energy electron accelerator comprising the filament supply of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020164940.5U CN211702517U (en) | 2020-02-12 | 2020-02-12 | Filament power supply device and low-energy electron accelerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020164940.5U CN211702517U (en) | 2020-02-12 | 2020-02-12 | Filament power supply device and low-energy electron accelerator |
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| Publication Number | Publication Date |
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| CN211702517U true CN211702517U (en) | 2020-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020164940.5U Active CN211702517U (en) | 2020-02-12 | 2020-02-12 | Filament power supply device and low-energy electron accelerator |
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| CN (1) | CN211702517U (en) |
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