Electronic load for testing high-voltage power supply of traveling wave tube

Abstract

The utility model discloses an electronic load for testing a traveling wave tube high-voltage power supply, and relates to the field of traveling wave tube high-voltage power supply testing. Comprising an electronic load cabinet, and the electronic load cabinet comprises a cathode / filament high-voltage power supply electronic load case and N collector high-voltage electronic load cases. The cathode / filament high-voltage power supply electronic load case and the collector high-voltage electronic load case have the same internal topological structure, and each cathode / filament high-voltage power supply electronic load case comprises a driving circuit, a feedback amplifying circuit and a main power board; according to the utility model, high-voltage power supplies of travelling wave tubes of most models can be tested in a compatible manner, the current value of a load can be dynamically adjusted in real time, parameters such as the output voltage and the output current of the current power supply can be displayed in real time, and the test operation safety is improved at the same time.

Description

Technical Field

[0001] The utility model relates to the field of traveling wave tube high voltage power supply testing, in particular to an electronic load for testing a traveling wave tube high voltage power supply. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] Common traveling wave tube high voltage power supplies such as Figure 4 As shown, the cathode to GND voltage is as high as about -10000V, and the number of collectors depends on the traveling wave tube model.

[0004] The traditional test load is to form a resistive load with a certain resistance value through a series resistor, and load the cathode, collector, and filament respectively. Figure 5 shown.

[0005] Traditional test loads have the following problems:

[0006] (1) There are many types of traveling wave tube high voltage power supplies, and their parameters (output voltage, output current, number of collectors) are different. During testing, it is necessary to make a corresponding resistive load for each type of traveling wave tube high voltage power supply. The resistive load is large in size, has many types of loads, and the load preparation work is cumbersome, which seriously affects the test efficiency.

[0007] (2) The output voltage of the traveling wave tube high voltage power supply is relatively high. The traditional resistive load is made of resistors connected in series. Due to the large error in the resistance value, the traditional resistive load measurement error is large and cannot be accurately adjusted.

[0008] (3) The resistive load is directly electrically connected to the high voltage part, which results in low operational safety. Utility Model Content

[0009] The purpose of the utility model is to provide an electronic load for testing a traveling wave tube high voltage power supply in view of the problems existing in the prior art, which can be compatible with testing most types of traveling wave tube high voltage power supplies, can dynamically adjust the current value of the load in real time, can display the output voltage, output current and other parameters of the current power supply in real time, and at the same time improve the safety of the test operation.

[0010] The technical solution of the utility model is as follows:

[0011] An electronic load for testing a traveling wave tube high voltage power supply, comprising:

[0012] An electronic load cabinet, the electronic load cabinet comprising: 1 cathode / filament high voltage power supply electronic load chassis, N collector high voltage electronic load chassis; the cathode / filament high voltage power supply electronic load chassis and the collector high voltage electronic load chassis have the same internal topology, specifically including:

[0013] A driving circuit, a feedback amplifier circuit and a main power board; the driving circuit is used to generate a reference 1 signal; the main power board includes: a voltage-balanced adjustment main power board and a current-balanced adjustment main power board; the feedback amplifier circuit performs feedback amplification on the sampling signals collected from the voltage-balanced adjustment main power board and the current-balanced adjustment main power board to generate a feedback amplified signal;

[0014] The current-adjusting main power board generates a corresponding current loop control signal according to its own feedback amplified signal and the reference 1 signal, thereby adjusting the test current; the voltage-equalizing main power board generates a corresponding voltage-equalizing loop control signal according to its own feedback amplified signal and the feedback amplified signal of the current-adjusting main power board, thereby controlling the dynamic resistance of the voltage-equalizing main power board, so that it follows and is equal to the dynamic resistance of the current-adjusting main power board, thereby achieving the purpose of balanced voltage division of the main power board.

[0015] Furthermore, the driving circuit includes: a panel adjustment module, an A\D conversion module, a high-voltage isolation module, and a D\A conversion module which are connected in sequence.

[0016] Furthermore, the A\D conversion module, the high-voltage isolation module, and the D\A conversion module can not only realize the electrical isolation between the human body's operating contact parts and the high-voltage power supply, but also enable the operation signal to be accurately transmitted to the subsequent stage.

[0017] Furthermore, the panel adjustment module sends an analog signal to the load through a knob or a button switch, and generates a reference 1 signal through an A\D conversion module, a high-voltage isolation module, and a D\A conversion module.

[0018] Furthermore, the analog signal includes: a RUN signal and an ADJ signal.

[0019] Furthermore, the feedback amplification circuit includes: a current sampling feedback amplification module and a voltage sampling feedback amplification module; the current adjustment main power board is connected to a current sampling feedback amplification module and a voltage sampling feedback amplification module, which are respectively used to collect the current feedback amplification signal and the voltage feedback amplification signal of the current adjustment main power board; the voltage equalization adjustment main power board is connected to a voltage sampling feedback amplification module, which is used to collect the voltage feedback amplification signal of the voltage equalization adjustment main power board.

[0020] Furthermore, it also includes: a current control module and a current driving circuit; the current control module compares the reference 1 signal with its own current feedback amplified signal to generate a corresponding current loop control signal, and the current loop control signal is further processed by the current driving circuit to generate an amplitude modulation signal, which controls the current to adjust the dynamic resistance of the main power board, thereby adjusting the test current.

[0021] Furthermore, it also includes: a voltage equalizing control module and a voltage equalizing driving circuit; the voltage feedback amplified signal collected by the voltage sampling feedback amplification module connected to the current adjustment main power board is used as the reference 2 signal; the voltage equalizing control module compares the reference 2 signal with its own voltage feedback amplified signal to generate a corresponding voltage equalizing loop control signal, and the voltage equalizing loop control signal is further processed by the voltage driving circuit to generate an amplitude modulation signal, thereby controlling the dynamic resistance of the voltage equalizing adjustment main power board, so that it follows and is equal to the dynamic resistance of the current adjustment main power board, thereby achieving the purpose of balanced voltage division of the main power board.

[0022] Furthermore, the main power board is composed of one current regulating main power board and four voltage balancing regulating main power boards connected in series.

[0023] Furthermore, it also includes: a sampling display module, which is used to dynamically display the test voltage and current of the high-voltage power supply electronic load in real time.

[0024] Compared with the existing technology, the beneficial effects of the utility model are:

[0025] 1. An electronic load for testing a traveling wave tube high voltage power supply adopts the "1+N" concept to integrate an electronic load cabinet and flexibly adjusts the number of collector loads according to the number of collectors of the traveling wave tube high voltage power supply.

[0026] 2. An electronic load for testing a traveling wave tube high voltage power supply realizes the expansion of the test voltage and test current range by connecting N-MOS tubes in series and in parallel.

[0027] 3. An electronic load for testing a traveling wave tube high voltage power supply, which adjusts the load current of a current adjustment main power board to achieve automatic series following adjustment of the current of other main power boards.

[0028] 4. An electronic load for testing a traveling wave tube high voltage power supply generates a reference signal by current adjusting the main power board crossover, which is used as a reference signal for voltage equalization adjustment of the main power board, thereby achieving balanced voltage division of each main power board and achieving the purpose of load stress balance of each power board. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention discloses a topological structure and working principle of an electronic load for testing a traveling wave tube high voltage power supply;

[0030] Figure 2 This is the main power board schematic diagram;

[0031] Figure 3 This is the structural diagram of the "1+N" traveling wave tube high voltage power supply electronic load cabinet;

[0032] Figure 4 This is a schematic diagram of a common traveling wave tube high voltage power supply;

[0033] Figure 5 It is the traditional traveling wave tube high voltage power supply test method and resistive load. DETAILED DESCRIPTION

[0034] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0035] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0036] Embodiment 1

[0037] See also Figure 1 , an electronic load for testing a traveling wave tube high voltage power supply, comprising:

[0038] An electronic load cabinet, the electronic load cabinet comprising:

[0039] 1 cathode / filament high voltage power supply electronic load chassis, N collection extremely high voltage electronic load chassis;

[0040] The cathode / filament high voltage power supply electronic load chassis and the collector high voltage electronic load chassis have the same internal topology structure, that is, the cathode / filament high voltage power supply electronic load chassis and the collector high voltage electronic load chassis have the same internal topology structure and working principle except for some specific circuit parameters (such as voltage and current range), which specifically include:

[0041] Driving circuit, feedback amplifier circuit and main power board;

[0042] The driving circuit is used to generate a reference 1 signal;

[0043] The main power board includes: a voltage-balanced adjustment main power board and a current-adjustment main power board; the feedback amplifier circuit performs feedback amplification on the sampling signals collected from the voltage-balanced adjustment main power board and the current-adjustment main power board to generate a feedback amplification signal;

[0044] The current adjustment main power board generates a corresponding current loop control signal according to its own feedback amplification signal and the reference 1 signal, thereby adjusting the test current;

[0045] The voltage-equalizing main power board generates a corresponding voltage-equalizing loop control signal according to its own feedback amplified signal and the feedback amplified signal of the current-adjusting main power board, thereby controlling the dynamic resistance of the voltage-equalizing main power board so that it follows and is equal to the dynamic resistance of the current-adjusting main power board, thereby achieving the purpose of balanced voltage division of the main power board.

[0046] In this embodiment, specifically, the driving circuit includes: a panel adjustment module, an A\D conversion module, a high-voltage isolation module, and a D\A conversion module which are connected in sequence.

[0047] In this embodiment, specifically, the A\D conversion module, the high-voltage isolation module, and the D\A conversion module can not only realize the electrical isolation between the human body's operating contact parts and the high-voltage power supply, but also enable the operation signal to be accurately transmitted to the subsequent stage.

[0048] In this embodiment, specifically, the panel adjustment module sends an analog signal to the load through a knob or a button switch, and generates a reference 1 signal through an A\D conversion module, a high-voltage isolation module, and a D\A conversion module.

[0049] In this embodiment, specifically, the analog signal includes: a RUN signal and an ADJ signal.

[0050] In this embodiment, specifically, the feedback amplifier circuit includes:

[0051] Current sampling feedback amplification module and voltage sampling feedback amplification module;

[0052] The current adjustment main power board is connected to a current sampling feedback amplification module and a voltage sampling feedback amplification module, which are used to collect the current feedback amplification signal and the voltage feedback amplification signal of the current adjustment main power board respectively;

[0053] The voltage-balanced adjustment main power board is connected with a voltage sampling feedback amplification module for collecting the voltage feedback amplification signal of the voltage-balanced adjustment main power board.

[0054] In this embodiment, specifically, it also includes:

[0055] Current control module and current driving circuit;

[0056] The current control module compares the reference 1 signal with its own current feedback amplified signal to generate a corresponding current loop control signal. The current loop control signal is further processed by the current drive circuit to generate an amplitude modulation signal, which controls the current to adjust the dynamic resistance of the main power board, thereby adjusting the test current.

[0057] In this embodiment, specifically, it also includes:

[0058] Voltage balancing control module and voltage balancing driving circuit;

[0059] The voltage feedback amplification signal collected by the voltage sampling feedback amplification module connected to the current adjustment main power board is used as the reference 2 signal;

[0060] The voltage balancing control module compares the reference 2 signal with its own voltage feedback amplified signal to generate a corresponding voltage balancing loop control signal. The voltage balancing loop control signal is further processed by the voltage driving circuit to generate an amplitude modulation signal, thereby controlling the dynamic resistance of the voltage balancing adjustment main power board to make it follow and equal to the dynamic resistance of the current adjustment main power board, thereby achieving the purpose of balanced voltage division of the main power board.

[0061] In this embodiment, specifically, Figure 2 As shown, the main power board is composed of 1 current adjustment main power board (each containing 8 parallel N-MOS tubes) and 4 voltage equalization adjustment main power boards (each containing 8 parallel N-MOS tubes) connected in series;

[0062] It should be noted that after the gate of the N-MOS tube is controlled by the amplitude modulation signal, the drain and source on-resistances change dynamically, thereby achieving the effect of controlling the current flowing through the N-MOS tube.

[0063] In this embodiment, specifically, it also includes:

[0064] The sampling display module is used to dynamically display the test voltage and current of the high-voltage power supply electronic load in real time, and has indication functions such as overvoltage, overcurrent, overpower, and fault.

[0065] Embodiment 2

[0066] like Figure 3 As shown, this embodiment adopts the "1+N" integrated standard chassis method to make an electronic load cabinet, which can be compatible with the testing of traveling wave tube high-voltage power supplies with different numbers of collectors. Where "1" refers to one "cathode / filament high-voltage power supply electronic load (TWT-KF-1)" chassis, "N" refers to multiple "collector high-voltage electronic load (TWT-C-1)" chassis, and "N" is determined by the number of collectors of the traveling wave tube high-voltage power supply, and the collector load can be flexibly increased or unloaded.

[0067] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.

[0068] This background technology section is provided to generally present the context of the present invention, and the work of the currently named inventors, the work to the extent described in this background technology section, and aspects of this section that did not constitute prior art at the time of application are neither explicitly nor implicitly admitted to be prior art of the present invention.

Claims

1. An electronic load for testing a traveling wave tube high voltage power supply, characterized in that: include: An electronic load cabinet, the electronic load cabinet comprising: 1 cathode / filament high voltage power supply electronic load chassis, N collector high voltage electronic load chassis; the cathode / filament high voltage power supply electronic load chassis and the collector high voltage electronic load chassis have the same internal topology, specifically including: A driving circuit, a feedback amplifier circuit and a main power board; the driving circuit is used to generate a reference 1 signal; the main power board includes: a voltage-balanced adjustment main power board and a current-balanced adjustment main power board; the feedback amplifier circuit performs feedback amplification on the sampling signals collected from the voltage-balanced adjustment main power board and the current-balanced adjustment main power board to generate a feedback amplified signal; The current-adjusting main power board generates a corresponding current loop control signal according to its own feedback amplified signal and the reference 1 signal, thereby adjusting the test current; the voltage-equalizing main power board generates a corresponding voltage-equalizing loop control signal according to its own feedback amplified signal and the feedback amplified signal of the current-adjusting main power board, thereby controlling the dynamic resistance of the voltage-equalizing main power board, so that it follows and is equal to the dynamic resistance of the current-adjusting main power board, thereby achieving the purpose of balanced voltage division of the main power board.

2. The electronic load for testing a traveling wave tube high voltage power supply according to claim 1, characterized in that: The driving circuit comprises: a panel adjustment module, an A\D conversion module, a high-voltage isolation module, and a D\A conversion module which are connected in sequence.

3. The electronic load for testing a traveling wave tube high voltage power supply according to claim 2, characterized in that: The A\D conversion module, high-voltage isolation module, and D\A conversion module can not only realize the electrical isolation between the human body's operating contact parts and the high-voltage power supply, but also enable the operation signal to be accurately transmitted to the subsequent stage.

4. The electronic load for testing a traveling wave tube high voltage power supply according to claim 3, characterized in that: The panel adjustment module sends an analog signal to the load through a knob or a button switch, and generates a reference 1 signal through an A\D conversion module, a high-voltage isolation module, and a D\A conversion module.

5. The electronic load for testing a traveling wave tube high voltage power supply according to claim 4, characterized in that: The analog signal includes: a RUN signal and an ADJ signal.

6. The electronic load for testing a traveling wave tube high voltage power supply according to claim 1, characterized in that: The feedback amplifier circuit includes: a current sampling feedback amplifier module and a voltage sampling feedback amplifier module; the current adjustment main power board is connected with a current sampling feedback amplifier module and a voltage sampling feedback amplifier module, which are respectively used to collect the current feedback amplification signal and the voltage feedback amplification signal of the current adjustment main power board; the voltage equalization adjustment main power board is connected with a voltage sampling feedback amplifier module, which is used to collect the voltage feedback amplification signal of the voltage equalization adjustment main power board.

7. The electronic load for testing a traveling wave tube high voltage power supply according to claim 6, characterized in that: Also includes: Current control module and current driving circuit; The current control module compares the reference 1 signal with its own current feedback amplified signal to generate a corresponding current loop control signal. The current loop control signal is further processed by the current drive circuit to generate an amplitude modulation signal, which controls the current to adjust the dynamic resistance of the main power board, thereby adjusting the test current.

8. The electronic load for testing a traveling wave tube high voltage power supply according to claim 6, characterized in that: Also includes: Voltage balancing control module and voltage balancing driving circuit; The voltage feedback amplification signal collected by the voltage sampling feedback amplification module connected to the current adjustment main power board is used as the reference 2 signal; The voltage balancing control module compares the reference 2 signal with its own voltage feedback amplified signal to generate a corresponding voltage balancing loop control signal. The voltage balancing loop control signal is further processed by the voltage driving circuit to generate an amplitude modulation signal, thereby controlling the dynamic resistance of the voltage balancing adjustment main power board to make it follow and equal to the dynamic resistance of the current adjustment main power board, thereby achieving the purpose of balanced voltage division of the main power board.

9. The electronic load for testing a traveling wave tube high voltage power supply according to claim 1, characterized in that: The main power board is composed of one current regulating main power board and four voltage balancing regulating main power boards connected in series.

10. The electronic load for testing a traveling wave tube high voltage power supply according to claim 1, characterized in that: Also includes: A sampling display module is used to dynamically display the test voltage and current of the high-voltage power supply electronic load in real time.

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