CN114553199A - Switch tube control system, switch tube control method, switch tube control device and medium - Google Patents
Switch tube control system, switch tube control method, switch tube control device and medium Download PDFInfo
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- CN114553199A CN114553199A CN202210441661.2A CN202210441661A CN114553199A CN 114553199 A CN114553199 A CN 114553199A CN 202210441661 A CN202210441661 A CN 202210441661A CN 114553199 A CN114553199 A CN 114553199A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0828—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in composite switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0081—Power supply means, e.g. to the switch driver
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The application discloses switch tube control system, this system includes: a sampling unit, a control unit; the sampling unit is connected with the switch tube to obtain the first end voltage and the second end voltage of the switch tube, and the switch tube is convenient to turn off according to the detection voltage. The control unit is connected with the sampling unit and the control end of the switch tube, and is used for acquiring a difference value of the voltage of the first end and the voltage of the second end as a detection voltage and controlling impedance connected with the control end of the switch tube according to the detection voltage. The working state of the switch tube is judged through the first end voltage and the second end voltage of the switch tube, so that the impedance connected with the control end of the switch tube is controlled, and the switch tube is prevented from being damaged due to overhigh voltage. Therefore, by adopting the switching tube control system provided by the application, the impedance connected with the control end of the switching tube can be accurately controlled, and the switching-off peak abnormality caused by overhigh voltage can be prevented. In addition, the application also provides a switching tube control method, a device and a medium, and the effects are the same as above.
Description
Technical Field
The present disclosure relates to the field of electronic devices, and in particular, to a switching tube control system, a switching tube control method, a switching tube control apparatus, and a switching tube control medium.
Background
An Insulated Gate Bipolar Transistor (IGBT) is a composite device of a Bipolar Junction Transistor (BJT) and a Field Effect Transistor (MOSFET), and has the characteristics of good on-state characteristics, high Gate input impedance, and high switching speed. When the IGBT is used, a step-off strategy is usually adopted to control the IGBT to be turned off, namely, in the turn-off process of the IGBT, the grid voltage of the IGBT is changed at a preset moment so as to reduce the voltage peak value between the collector and the emitter of the IGBT and prevent the IGBT from being damaged.
However, this solution cannot be applied to some special cases, such as: under the condition of high voltage and low current, the time required by the turn-off process of the IGBT is prolonged, and the change of the grid voltage according to the preset time can cause the abnormal turn-off spike of the IGBT and even cause the damage of the IGBT.
Therefore, the problem that needs to be solved by those skilled in the art is how to provide a switching tube control method with strong adaptability to prevent the switching tube from being damaged due to the voltage peak between the collector and the emitter of the switching tube when the switching tube is turned off.
Disclosure of Invention
The application aims to provide a switching tube control system, a switching tube control method, a switching tube control device and a switching tube control medium, and the switching tube control system, the switching tube control device and the switching tube control medium can prevent the switching tube from being damaged due to the fact that the voltage peak value between the collector and the emitter of the switching tube is too high when the switching tube is turned off.
In order to solve the above technical problem, the present application provides a switch tube control system, including:
a sampling unit 1, a control unit 2;
the sampling unit 1 is connected with a switching tube and used for acquiring a first end voltage and a second end voltage of the switching tube;
the control unit 2 is connected to the sampling unit 1, and is configured to receive the first terminal voltage and the second terminal voltage, and obtain a detection voltage, where the detection voltage is an absolute value of a difference between the first terminal voltage and the second terminal voltage;
the control unit 2 is further connected with the control end of the switch tube so as to control the impedance connected with the control end of the switch tube according to the detection voltage.
Preferably, the control unit 2 includes: a logic control unit and an impedance control unit;
the logic control unit is connected with the sampling unit 1 and used for acquiring the detection voltage and generating a control signal to control the impedance control unit to adjust the impedance;
when the detection voltage is smaller than a first voltage threshold value, the logic control unit generates a first control signal;
when the detection voltage is not less than the first voltage threshold, the logic control unit generates a second control signal;
when the detection voltage is greater than the first voltage threshold and the time elapsed since the time at which the second control signal is generated is greater than a threshold time, the logic control unit generates a third control signal;
the impedance control unit is connected with the logic control unit and used for acquiring the control signal and controlling the impedance.
Preferably, the impedance control unit is a step control switch;
when the first control signal or the third control signal is obtained, the impedance control unit controls the control end of the switching tube to be connected with a first resistive device;
when the second control signal is acquired, the impedance control unit controls the control end of the switching tube to be connected with a second resistive device;
the resistance of the first resistive device is less than the resistance of the second resistive device.
Preferably, the device further comprises a differential amplifying unit;
the first end of the differential amplification unit is connected with the first end of the switch tube, and the second end of the differential amplification unit is connected with the second end of the switch tube, and is used for acquiring the detection voltage and amplifying the detection voltage.
Preferably, the sampling unit 1 includes a third resistive device and a fourth resistive device;
the first end of the third resistive device is connected with the first end of the switching tube, and the second end of the third resistive device is connected with the first end of the differential amplification unit;
the first end of the fourth resistive device is connected with the first end of the switching tube, and the second end of the fourth resistive device is connected with the second end of the differential amplification unit.
Preferably, the detection circuit further comprises a comparing unit, configured to determine whether the detection voltage is greater than the first voltage threshold;
the input end of the comparison unit is connected with the output end of the differential amplification unit to obtain the detection voltage;
the output end of the comparison unit is connected with the control unit 2 to send the judgment result to the control unit 2.
In order to solve the above technical problem, the present application further provides a switching tube control method, which is applied to the switching tube control system, and includes:
acquiring a first end voltage and a second end voltage of a switching tube;
acquiring a detection voltage, wherein the detection voltage is an absolute value of a difference value between the first terminal voltage and the second terminal voltage;
and controlling the impedance connected with the control end of the switch tube according to the detection voltage.
In order to solve the above technical problem, the present application further provides a switching tube control apparatus, including:
the first acquisition module is used for acquiring a first end voltage and a second end voltage of the switching tube;
a second obtaining module, configured to obtain a detection voltage, where the detection voltage is an absolute value of a difference between the first terminal voltage and the second terminal voltage;
and the control module is used for controlling the impedance connected with the control end of the switching tube according to the detection voltage.
In order to solve the above technical problem, the present application further provides a switching tube control apparatus, including a memory for storing a computer program;
and the processor is used for realizing the steps of the switching tube control method when executing the computer program.
In order to solve the above technical problem, the present application further provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the switching tube control method.
The application provides a switch tube control system, includes: a sampling unit, a control unit; the sampling unit is connected with the switch tube to obtain the first end voltage and the second end voltage of the switch tube, and the switch tube is convenient to turn off according to the detection voltage. The control unit is connected with the sampling unit and the control end of the switch tube, and is used for acquiring a difference value of the voltage of the first end and the voltage of the second end as a detection voltage and controlling impedance connected with the control end of the switch tube according to the detection voltage. The working state of the switch tube is judged through the first end voltage and the second end voltage of the switch tube, so that the impedance connected with the control end of the switch tube is controlled, and the switch tube is prevented from being damaged due to overhigh voltage. Therefore, by adopting the switching tube control system provided by the application, the impedance connected with the control end of the switching tube can be accurately controlled, and the switching-off peak abnormality of the switching tube caused by overhigh voltage is prevented so as to protect the switching tube.
In addition, the application also provides a switching tube control method, a device and a medium, which are applied to the switching tube control system and have the same effects as the above.
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 structural diagram of a switching tube control system according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a turn-off waveform of an IGBT according to an embodiment of the present application;
fig. 3 is a structural diagram of a switching tube control device according to an embodiment of the present application;
fig. 4 is a flowchart of a switching tube control method according to an embodiment of the present disclosure;
fig. 5 is a structural diagram of a switching tube control device according to another embodiment of the present application;
fig. 6 is a structural diagram of a switching tube control device according to another embodiment of the present application;
the reference numbers are as follows: the system comprises a sampling unit 1, a control unit 2, a first acquisition module 10, a second acquisition module 11, a control module 12, a processor 21, a memory 20, a computer program 201, an operating system 202, data 203, a display screen 22, an input/output interface 23, a communication interface 24, a power supply 25 and a communication bus 26.
Detailed Description
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 only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.
The core of the application is to provide a switching tube control system, a switching tube control method, a switching tube control device and a medium.
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings.
Fig. 1 is a structural diagram of a switching tube control system according to an embodiment of the present application, and as shown in fig. 1, the system includes:
a sampling unit 1, a control unit 2;
the sampling unit 1 is connected with the switching tube and used for acquiring a first end voltage and a second end voltage of the switching tube;
the control unit 2 is connected with the sampling unit 1 and is used for receiving the first end voltage and the second end voltage and acquiring a detection voltage, wherein the detection voltage is an absolute value of a difference value of the first end voltage and the second end voltage;
the control unit 2 is also connected with the control end of the switch tube to control the impedance connected with the control end of the switch tube according to the detection voltage.
In specific implementation, the sampling unit 1 is connected with the first end and the second end of the switching tube, and is used for acquiring voltage at the two ends of the switching tube and sending the voltage value to the control unit 2, so that the control unit 2 controls the switching tube to be switched on and off according to the voltage of the switching tube. The sampling unit 1 may be a sampling circuit composed of electronic devices, or may be an integrated unit having a sampling chip. In this embodiment, a switching tube control circuit system is described by taking an IGBT as an example.
It will be appreciated that, in order to prevent the sampling process from affecting the normal operation of the switching tube, the sampling unit 1 further comprises a third resistive device and a fourth resistive device. In specific implementation, because the collector and the emitter of the switching tube have strong common-mode interference, a differential amplification unit is also needed to be arranged, and the collected voltage signal is amplified through the differential amplification unit so as to be convenient for subsequent control of the switching tube.
It should be noted that the control unit 2 adopted in this embodiment may be an additionally arranged control unit 2, or may multiplex the control unit 2 in the original circuit, and the second scheme may reduce the hardware cost.
Fig. 2 is a schematic diagram of an IGBT turn-off waveform provided in this embodiment of the present application, as shown in fig. 2, Vge is a timing diagram of a voltage difference between a gate and an emitter of a switching tube, Vce is a timing diagram of a voltage difference between a collector and an emitter of the switching tube (i.e., the first end and the second end of the switching tube mentioned in this embodiment), Ic is a collector current, Vsense is a timing diagram of an output voltage of a differential amplification unit, and Vgs _ Q1 and Vgs _ Q2 are timing diagrams of two-stage switches in an impedance control unit, respectively. The switching tube is turned off from t0 to t3, so the switching tube control strategy provided by the application needs to be adopted from t0 to t3 to realize step turn-off. In specific implementation, after a switching tube turn-off instruction is obtained, a first end voltage and a second end voltage of the switching tube are obtained through the sampling unit 1, a detection voltage is calculated according to the first end voltage and the second end voltage, whether the switching tube is in a turn-off state is judged through the detection voltage, if the switching tube is in the turn-off state, whether the detection voltage is larger than a threshold voltage (the threshold voltage is usually 0.7 times of a power bus voltage connected with the switching tube) is judged, and if the detection voltage is larger than the threshold voltage, impedance connected with a control end of the switching tube is adjusted through the control unit 2, so that the switching tube is prevented from being damaged due to overhigh voltage. It is understood that, in order to ensure that the switching tube is normally turned off, a plurality of threshold voltages may be set, for example: the threshold voltage includes a first detection voltage and a second detection voltage, wherein the first detection voltage is less than the second detection voltage. And the resistance impedance value connected with the control end of the switching tube is changed by judging the magnitude relation between the detection voltage and each threshold voltage so as to control the switching tube to be switched off in a grading manner.
It can be understood that, in the solution provided in the embodiment of the present application, the voltage at the first terminal and the voltage at the second terminal of the switching tube are fed back to the control system as feedback values, and the operating state of the switching tube is determined according to the voltage difference between the two terminals of the switching tube, so as to adjust the impedance connected to the control terminal of the switching tube.
The present application provides a switch tube control system, including: a sampling unit, a control unit; the sampling unit is connected with the switch tube to obtain the first end voltage and the second end voltage of the switch tube, and the switch tube is convenient to turn off according to the detection voltage. The control unit is connected with the sampling unit and the control end of the switch tube, and is used for acquiring a difference value of the voltage of the first end and the voltage of the second end as a detection voltage and controlling impedance connected with the control end of the switch tube according to the detection voltage. The working state of the switch tube is judged through the first end voltage and the second end voltage of the switch tube, so that the impedance connected with the control end of the switch tube is controlled, and the switch tube is prevented from being damaged due to overhigh voltage. Therefore, by adopting the switching tube control system provided by the application, the impedance connected with the control end of the switching tube can be accurately controlled, and the switching-off peak abnormality of the switching tube caused by overhigh voltage is prevented so as to protect the switching tube.
In specific implementation, the working state of the switching tube comprises a normal working state and a turn-off process, and when the switching tube is in the normal working state, the switching tube does not need to be controlled.
In order to save the computing resource, on the basis of the above embodiment, the controlling the impedance connected to the control terminal of the switching tube according to the detected voltage includes: judging whether the switching tube is in a turn-off process; if the voltage is in the turn-off process, judging whether the detection voltage is lower than a threshold voltage; if the voltage is lower than the threshold voltage, the impedance connected with the control end of the switching tube is adjusted.
In the embodiment, the threshold voltage is not limited, and is usually 3V. Further, in order to improve the control accuracy of the switching tube, a plurality of threshold voltages may be set.
In the embodiment, the switching tube is controlled only when the switching tube is in the turn-off process, and the impedance connected with the control end of the switching tube is adjusted when the detection voltage is lower than the threshold voltage, so that the normal work of the switching tube is prevented from being influenced, and the stability and the reliability of the switching tube control system are improved.
In a specific implementation, the sampling unit 1 and the control unit 2 may be integrated units, for example, the sampling unit 1 is a high-speed sampling chip, the high-speed sampling chip is directly connected to the first end and the second end of the switching tube to obtain the sampling signal, and the control unit 2 may be a single microcontroller having an operating system; a combination of multiple microcontrollers and control circuits is also possible.
On the basis of the above embodiment, the control unit 2 of the switching tube control system includes: a logic control unit 2 and an impedance control unit 2; the logic control unit is connected with the sampling unit 1 and used for acquiring the detection voltage and generating a control signal according to the detection voltage. When the detection voltage is smaller than a first voltage threshold value, the logic control unit generates a first control signal;
the logic control unit generates a second control signal when the detection voltage is not less than the first voltage threshold;
when the detection voltage is larger than the first voltage threshold and the time elapsed since the time of generating the second control signal is larger than the threshold time, the logic control unit generates a third control signal; the impedance control unit 2 is connected with the logic control unit 2 and used for acquiring a control signal and controlling the impedance connected with the control end of the switch tube.
As a preferred embodiment, the switching tube control system further comprises a differential amplifying unit and a comparing unit; the comparison unit is used for judging whether the detection voltage is greater than the threshold voltage; the input end of the comparison unit is connected with the output end of the differential amplification unit to obtain detection voltage; the output of the comparing unit is connected to the control unit 2 to send the result of the determination to the control unit 2.
The first end of the differential amplification unit is connected with the first end of the switch tube, and the second end of the differential amplification unit is connected with the second end of the switch tube and used for acquiring detection voltage and amplifying the detection voltage.
In a specific implementation, the sampling unit 1 includes a third resistive device and a fourth resistive device; the first end of the third resistive device is connected with the first end of the switching tube, and the second end of the third resistive device is connected with the first end of the differential amplification unit; the first end of the fourth resistive device is connected with the first end of the switching tube, and the second end of the fourth resistive device is connected with the second end of the differential amplification unit. It will be appreciated that the third and fourth resistive devices may be a single resistor or a combination of resistors, or may be other resistive devices.
Fig. 3 is a structural diagram of a switching tube control apparatus according to an embodiment of the present application, and as shown in fig. 3, a sampling unit 1 includes a resistive voltage dividing network, a differential amplifying unit, and a comparator, where the resistive voltage dividing network includes a third resistive device and a fourth resistive device, the third resistive device is connected to a first end of a switching tube, and the fourth resistive device is connected to a second end of the switching tube, and is used for acquiring a voltage detection signal and preventing a detection circuit from affecting normal operation of the switching tube; the differential amplification unit is used for amplifying the acquired detection signal so as to process the voltage signal subsequently; the comparator is used for judging whether the detection voltage is larger than the threshold voltage so as to determine whether the impedance connected with the control end of the switching tube needs to be adjusted.
The control unit 2 comprises a logic control unit 2 and an impedance control unit 2, wherein the logic control unit 2 is configured to determine whether to adjust the impedance connected to the control end of the switching tube according to a detection result of the comparator, and if the adjustment is required, generate an adjustment instruction and send the adjustment instruction to the impedance control unit 2, it can be understood that the impedance control unit 2 is a circuit formed by MOS transistors, and can control the on and off of each MOS transistor according to the adjustment instruction, so as to adjust the output of the impedance control unit 2, and achieve the purpose of adjusting the impedance connected to the control end of the switching tube.
In this embodiment, through adopting sampling unit and the control unit that has a plurality of microcontrollers and control circuit, prevent to influence the normal work of switch tube among the sampling process, simultaneously, distribute sampling task and control task to a plurality of microprocessors, prevent that single microprocessor trouble from leading to the unable normal work of system, improve switch tube control system's stability and reliability.
It will be appreciated that when the peak voltage is reduced by changing the impedance connected to the gate of the switching tube, the more the impedance can be selected, the more beneficial it is to achieve accurate regulation of the peak voltage at different times, but at higher cost.
In order to solve this problem, on the basis of the above-described embodiment, the impedance control unit is a step control switch; when the first control signal or the third control signal is obtained, the impedance control unit controls the control end of the switching tube to be connected with the first resistive device; when a second control signal is acquired, the impedance control unit controls the control end of the switching tube to be connected with the second resistive device; the resistance value of the first resistive device is smaller than that of the second resistive device, and the resistance value of the second resistive device is 10 times that of the first resistive device.
In this embodiment, the stepped control switch is selected as the impedance control unit, so that the impedance value connected with the control end of the switching tube can be quickly and conveniently adjusted, and the switching tube is controlled to be turned off in a stepped manner.
Fig. 4 is a flowchart of a switching tube control method according to an embodiment of the present application, and as shown in fig. 4, the method shown in fig. 4 includes:
s10: and acquiring the voltage of the first end and the voltage of the second end of the switching tube.
S11: and acquiring a detection voltage which is an absolute value of a difference value of the first end voltage and the second end voltage.
S12: and controlling the impedance connected with the control end of the switching tube according to the detection voltage.
Since the embodiment of the apparatus portion corresponds to the embodiment of the system portion, please refer to the description of the embodiment of the system portion for the embodiment of the apparatus portion, which is not repeated here.
The embodiment provides a switching tube control method, which is applied to the switching tube control system, and the system includes: a sampling unit, a control unit; the sampling unit is connected with the switch tube to obtain the first end voltage and the second end voltage of the switch tube, and the switch tube is convenient to turn off according to the detection voltage. The control unit is connected with the sampling unit and the control end of the switch tube, and is used for acquiring a difference value of the voltage of the first end and the voltage of the second end as a detection voltage and controlling impedance connected with the control end of the switch tube according to the detection voltage. The working state of the switch tube is judged through the first end voltage and the second end voltage of the switch tube, so that the impedance connected with the control end of the switch tube is controlled, and the damage of the switch tube caused by overhigh voltage is prevented. Therefore, by adopting the switching tube control system provided by the application, the impedance connected with the control end of the switching tube can be accurately controlled, and the switching-off peak abnormality of the switching tube caused by overhigh voltage is prevented so as to protect the switching tube.
In the above embodiments, the switching tube control method is described in detail, and the present application also provides embodiments corresponding to the switching tube control device. It should be noted that the present application describes the embodiments of the apparatus portion from two perspectives, one from the perspective of the function module and the other from the perspective of the hardware.
Fig. 5 is a structural diagram of a switching tube control apparatus according to another embodiment of the present application, and as shown in fig. 5, the apparatus includes:
the first obtaining module 10 is used for obtaining a first end voltage and a second end voltage of the switching tube;
and a second obtaining module 11, configured to obtain a detection voltage, where the detection voltage is an absolute value of a difference between the first terminal voltage and the second terminal voltage.
And the control module 12 is used for controlling the impedance connected with the control end of the switching tube according to the detection voltage.
Since the embodiment of the apparatus portion corresponds to the embodiment of the system portion, please refer to the description of the embodiment of the system portion for the embodiment of the apparatus portion, and details are not repeated here.
The present embodiment provides a switching tube control device, which is applied to the above switching tube control system, and the system includes: a sampling unit, a control unit; the sampling unit is connected with the switch tube to obtain the first end voltage and the second end voltage of the switch tube, and the switch tube is convenient to turn off according to the detection voltage. The control unit is connected with the sampling unit and the control end of the switching tube, and is used for acquiring a difference value of the voltage of the first end and the voltage of the second end as detection voltage and controlling impedance connected with the control end of the switching tube according to the detection voltage. The working state of the switch tube is judged through the first end voltage and the second end voltage of the switch tube, so that the impedance connected with the control end of the switch tube is controlled, and the switch tube is prevented from being damaged due to overhigh voltage. Therefore, by adopting the switching tube control system provided by the application, the impedance connected with the control end of the switching tube can be accurately controlled, and the switching-off peak abnormality of the switching tube caused by overhigh voltage is prevented so as to protect the switching tube.
Fig. 6 is a structural diagram of a switching tube control apparatus according to another embodiment of the present application, and as shown in fig. 6, the switching tube control apparatus includes: a memory 20 for storing a computer program;
and the processor 21 is configured to implement the steps of the method for acquiring the first terminal voltage and the second terminal voltage of the switching tube according to the above embodiment when executing the computer program.
The control unit provided in this embodiment may include, but is not limited to, a smart phone, a tablet computer, a notebook computer, or a desktop computer.
The processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 21 may be implemented in at least one hardware form of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA). The processor 21 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 21 may be integrated with a Graphics Processing Unit (GPU) which is responsible for rendering and drawing the content required to be displayed by the display screen. In some embodiments, the processor 21 may further include an Artificial Intelligence (AI) processor for processing computational operations related to machine learning.
The memory 20 may include one or more computer-readable storage media, which may be non-transitory. Memory 20 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used for storing the following computer program 201, wherein after the computer program is loaded and executed by the processor 21, the relevant steps of the switching tube control method disclosed in any of the foregoing embodiments can be implemented. In addition, the resources stored in the memory 20 may also include an operating system 202, data 203, and the like, and the storage manner may be a transient storage manner or a permanent storage manner. Operating system 202 may include, among others, Windows, Unix, Linux, and the like. Data 203 may include, but is not limited to, voltage across a switching tube, etc.
In some embodiments, the switching tube control device may further include a display 22, an input/output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.
Those skilled in the art will appreciate that the configuration shown in fig. 6 does not constitute a limitation of the switching tube control and may include more or fewer components than those shown.
The switching tube control device provided by the embodiment of the application comprises a memory and a processor, and when the processor executes a program stored in the memory, the following method can be realized:
and acquiring the voltage of the first end and the voltage of the second end of the switching tube.
And acquiring a detection voltage which is an absolute value of a difference value of the first end voltage and the second end voltage.
And controlling the impedance connected with the control end of the switching tube according to the detection voltage.
Finally, the application also provides a corresponding embodiment of the computer readable storage medium. The computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps as set forth in the above-mentioned method embodiments.
It is to be understood that if the method in the above embodiments is implemented in the form of software functional units and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium and executes all or part of the steps of the methods described in the embodiments of the present application, or all or part of the technical solutions. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above detailed description is provided for a switch tube control system, a switch tube control method, a switch tube control device, and a switch tube control medium. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
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, method, 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, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A switch tube control system, comprising:
a sampling unit (1), a control unit (2);
the sampling unit (1) is connected with a switching tube and is used for acquiring a first end voltage and a second end voltage of the switching tube;
the control unit (2) is connected with the sampling unit (1) and is used for receiving the first end voltage and the second end voltage and acquiring a detection voltage, wherein the detection voltage is an absolute value of a difference value of the first end voltage and the second end voltage;
the control unit (2) is also connected with the control end of the switch tube so as to control the impedance connected with the control end of the switch tube according to the detection voltage.
2. Switching tube control system according to claim 1, characterized in that the control unit (2) comprises: a logic control unit and an impedance control unit;
the logic control unit is connected with the sampling unit (1) and used for acquiring the detection voltage and generating a control signal to control the impedance control unit to adjust the impedance;
when the detection voltage is smaller than a first voltage threshold value, the logic control unit generates a first control signal;
when the detection voltage is not larger than the first voltage threshold, the logic control unit generates a second control signal;
when the detection voltage is greater than the first voltage threshold and the time elapsed since the time at which the second control signal is generated is greater than a threshold time, the logic control unit generates a third control signal;
the impedance control unit is connected with the logic control unit and used for acquiring the control signal and controlling the impedance.
3. The switching tube control system of claim 2, wherein the impedance control unit is a step control switch;
when the first control signal or the third control signal is obtained, the impedance control unit controls the control end of the switching tube to be connected with a first resistive device;
when the second control signal is acquired, the impedance control unit controls the control end of the switching tube to be connected with a second resistive device;
the resistance of the first resistive device is less than the resistance of the second resistive device.
4. The switching tube control system according to claim 2, further comprising a differential amplification unit;
the first end of the differential amplification unit is connected with the first end of the switch tube, and the second end of the differential amplification unit is connected with the second end of the switch tube, and is used for acquiring the detection voltage and amplifying the detection voltage.
5. The switching tube control system according to claim 4, wherein the sampling unit (1) comprises a third resistive device and a fourth resistive device;
the first end of the third resistive device is connected with the first end of the switching tube, and the second end of the third resistive device is connected with the first end of the differential amplification unit;
the first end of the fourth resistive device is connected with the first end of the switching tube, and the second end of the fourth resistive device is connected with the second end of the differential amplification unit.
6. The switching tube control system according to claim 5, further comprising a comparing unit for determining whether the detected voltage is greater than the first voltage threshold;
the input end of the comparison unit is connected with the output end of the differential amplification unit to obtain the detection voltage;
the output end of the comparison unit is connected with the control unit (2) so as to send the judgment result to the control unit (2).
7. A switching tube control method is applied to the switching tube control system of any one of claims 1 to 6, and comprises the following steps:
acquiring a first end voltage and a second end voltage of a switching tube;
acquiring a detection voltage, wherein the detection voltage is an absolute value of a difference value between the first terminal voltage and the second terminal voltage;
and controlling the impedance connected with the control end of the switching tube according to the detection voltage.
8. A switching tube control apparatus, characterized by comprising:
the first acquisition module is used for acquiring a first end voltage and a second end voltage of the switching tube;
a second obtaining module, configured to obtain a detection voltage, where the detection voltage is an absolute value of a difference between the first terminal voltage and the second terminal voltage;
and the control module is used for controlling the impedance connected with the control end of the switching tube according to the detection voltage.
9. A switching tube control apparatus, characterized by comprising a memory for storing a computer program;
processor for implementing the steps of the switching tube control method as claimed in claim 7 when executing said computer program.
10. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the switching tube control method as claimed in claim 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210441661.2A CN114553199A (en) | 2022-04-26 | 2022-04-26 | Switch tube control system, switch tube control method, switch tube control device and medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210441661.2A CN114553199A (en) | 2022-04-26 | 2022-04-26 | Switch tube control system, switch tube control method, switch tube control device and medium |
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