WO2024041099A1

WO2024041099A1 - Driving voltage control method, apparatus and device, and medium

Info

Publication number: WO2024041099A1
Application number: PCT/CN2023/099337
Authority: WO
Inventors: 朱光斗; 张伟; 姜卫栋; 马海洋; 陈锋; 叶敬伟
Original assignee: 新誉集团有限公司; 新誉轨道交通科技有限公司
Priority date: 2022-08-25
Filing date: 2023-06-09
Publication date: 2024-02-29
Also published as: CN115313813A; CN115313813B

Abstract

A driving voltage control method, apparatus and device, and a medium, relating to the technical field of semiconductor devices, and applied to a control circuit comprising a switch transistor. A plurality of current channels are arranged between the switch transistor and a control module used for controlling the switch transistor. The method comprises: monitoring the current driving voltage of the switch transistor, and obtaining a target voltage value; determining a target duration actually required when the switch transistor falls from Vce to the target voltage value or rises from zero to the target voltage value, and determining an ideal duration required when the switch transistor falls from Vce to the target voltage value or rises from zero to the target voltage value under an ideal condition; and adjusting the current channels between the control module and the switch transistor according to the difference value between the target duration and the ideal duration. By means of the method, the driving voltage of the switch transistor can be controlled and adjusted in real time, the switching on/off curve of the switch transistor can be conveniently adjusted, and the overall reliability of the control circuit in the operation process is ensured.

Description

A driving voltage control method, device, equipment and medium

This application claims the priority of the Chinese patent application submitted to the China Patent Office on August 25, 2022, with the application number 202211025793.3 and the invention title "A control method, device, equipment and medium for driving voltage", and its entire content is approved by This reference is incorporated into this application.

Technical field

The present invention relates to the technical field of semiconductor devices, and in particular to a driving voltage control method, device, equipment and medium.

Background technique

Control circuit is a very common circuit control module in electrical control equipment. In many control circuits, switching tubes are used to control the driving voltage in the control circuit. Among them, the driving voltage of the switching tube is important for the stable operation of the control circuit. Plays a very important role.

However, in the existing technology, the driving voltage of the switching tube cannot be adjusted in real time according to the actual operating status of the control circuit. The control method of the driving circuit is unclear, and the driving current of the switching tube cannot be adjusted automatically in real time. It can control the on and off of the switch tube according to the preset control parameters, which will cause the driving voltage of the switch tube in the control circuit to be too large or too small, and thus cause the control circuit to There are high safety risks in actual operation. At present, there is no more effective solution to this technical problem.

Contents of the invention

In view of this, the purpose of the present invention is to provide a driving voltage control method, device, equipment and medium to control and adjust the driving voltage of the switching tube in the control circuit in real time, and to ensure the overall integrity of the control circuit during operation. reliability. The specific plan is as follows:

A method of controlling driving voltage, applied to a control circuit containing a switching tube. Multiple current channels are provided between the switching tube and a control module used to control the switching tube. The method includes:

Send a switch control signal to the switch tube;

Monitor the current driving voltage of the switch tube to obtain the target voltage value;

Determine the actual target time required when the switch tube drops from Vce to the target voltage value or rises from zero to the target voltage value, and determine whether the switch tube drops from the Vce to the target voltage value under ideal circumstances. The target voltage value or the ideal time required to rise from zero to the target voltage value; wherein, the Vce is the voltage when the switch tube is turned on and off;

Determine the target difference between the target duration and the ideal duration, and adjust the current channel between the control module and the switch tube according to the target difference, so that the driving of the switch tube The voltage curve reaches the preset voltage curve.

Preferably, the switching tube is specifically an IGBT, a MOS tube, or a triode.

Preferably, the process of sending a switching control signal to the switching tube includes:

The switching control signal is sent to the switch tube through a target current channel; wherein the target current channel is any one of a plurality of current channels.

Preferably, after the process of sending a switching control signal to the switching tube, the process further includes:

Detect the signal fed back by the switch to obtain a target feedback signal, and determine whether the target feedback signal is consistent with a preset feedback signal; wherein the preset feedback signal is based on the Vce and the target current channel. The signal set by the current conduction value;

If the target feedback signal is consistent with the preset feedback signal, it is determined that the target current channel is successfully opened;

If the target feedback signal is inconsistent with the preset feedback signal, it is determined that the target current channel has not been successfully opened.

Preferably, the process of determining the ideal time required for the switch tube to ideally drop from the Vce to the target voltage value or rise from zero to the target voltage value includes:

The ideal time required for the switch tube to fall from the Vce to the target voltage value or rise from zero to the target voltage value is determined according to the preset mapping relationship; wherein, the preset The mapping relationship includes: the corresponding relationship between each voltage value and time in the process of the switch tube falling from the Vce to zero under ideal conditions, and the corresponding relationship between each voltage value in the process of the switch tube rising from zero to the Vce under ideal conditions. Correspondence between voltage value and time.

Preferably, the current conduction values of the multiple current channels are in a proportional increasing relationship, and the increasing proportion and the minimum current conduction value in the current channels are set according to the control accuracy of the control circuit.

Preferably, the relationship between the control module and the switching tube is determined according to the target difference value. The process of adjusting the current channel includes:

Determine whether the target difference is equal to a preset threshold; wherein the control module sends the switch control signal to the switch tube through a preset current channel;

If the target difference is equal to the preset threshold, there is no need to adjust the current channel between the control module and the switch tube, and it is determined that the driving voltage curve of the switch tube reaches the preset voltage curve. ;

If the target difference is greater than the preset threshold, the number of conduction current channels between the control module and the switch tube is increased according to the target difference, and the monitoring is performed repeatedly. The step of obtaining the target voltage value from the current driving voltage of the switch tube until the target difference equals the preset threshold;

If the target difference is less than the preset threshold, the number of conduction current channels between the control module and the switch tube is reduced according to the target difference, and the monitoring is performed repeatedly. The step of obtaining the target voltage value based on the current driving voltage of the switch tube until the target difference equals the preset threshold.

Correspondingly, the present invention also discloses a driving voltage control device, which is applied to a control circuit containing a switching tube. A plurality of current channels are provided between the switching tube and a control module used to control the switching tube. , the device includes:

A signal sending module, used to send switching control signals to the switching tube;

A voltage monitoring module is used to monitor the current driving voltage of the switch tube and obtain the target voltage value;

The voltage judgment module is used to determine the actual target time required when the switch tube drops from Vce to the target voltage value or rises from zero to the target voltage value, and determines whether the switch tube starts from the target voltage value under ideal circumstances. The ideal time required when the Vce drops to the target voltage value or rises from zero to the target voltage value; wherein, the Vce is the voltage when the switch tube is turned on and off;

A channel adjustment module is used to determine the target difference between the target duration and the ideal duration, and adjust the current channel between the control module and the switch tube according to the target difference, so that The driving voltage curve of the switching tube reaches the preset voltage curve.

Correspondingly, the present invention also discloses a driving voltage control device, including:

Memory, used to store computer programs;

A processor, configured to implement the steps of a driving voltage control method as disclosed above when executing the computer program.

Correspondingly, the present invention also discloses a computer-readable storage medium. A computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, the control of the driving voltage as disclosed above is implemented. Method steps.

It can be seen that in the driving voltage control method provided by the present invention, multiple current channels are set in advance between the control module of the control circuit and the switching tube; after the control module sends the switching control signal to the switching tube, it will monitor the switching tube. The current driving voltage is the current driving voltage to obtain the target voltage value; then, determine the actual target time required when the switching tube drops from Vce to the target voltage value or rises from zero to the target voltage value, and determine that the switching tube drops from Vce to the target voltage value under ideal circumstances. The target voltage value or the ideal time required to rise from zero to the target voltage value; finally, determine the target difference between the target time and the ideal time, and adjust the current channel between the control module and the switch tube based on the target difference. Making adjustments is equivalent to real-time regulation of the driving voltage of the switching tube according to the actual operating status of the control circuit, and enables the driving voltage curve of the switching tube to reach the preset voltage curve. Compared with the existing technology, this method can control the driving voltage of the switch tube in the control circuit in real time, avoiding the situation where the driving voltage of the switch tube is too large or too small. At the same time, it can also conveniently control the switch. The tube adjusts the opening and closing curves. Therefore, this method can further improve the overall reliability of the control circuit during operation. Correspondingly, the driving voltage control device, equipment and medium provided by the present invention also have the above beneficial effects.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without exerting creative efforts.

Figure 1 is a flow chart of a driving voltage control method provided by an embodiment of the present invention;

Figure 2 is a structural diagram of a control circuit provided by an embodiment of the present invention;

Figure 3 shows the change of the switching tube when it drops from Vce to zero and rises from zero to Vce under ideal conditions. schematic diagram;

Figure 4 is a schematic diagram of the feedback signal of the switch tube when the control module sends switching control signals to the switch tube through each current channel;

Figure 5 is a flow chart for regulating the driving voltage of a switching tube according to an embodiment of the present invention;

Figure 6 is a schematic diagram of regulating the driving voltage of the switching tube through the current channel D6 in Figure 2;

Figure 7 is a schematic diagram of regulating the driving voltage of the switching tube through the current channels D6 and D0 in Figure 2;

Figure 8 is a structural diagram of a driving voltage control device provided by an embodiment of the present invention;

FIG. 9 is a structural diagram of a driving voltage control device provided by an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Please refer to Figure 1. Figure 1 is a flow chart of a driving voltage control method provided by an embodiment of the present invention. The method is applied to a control circuit containing a switch tube, a switch tube and a control device for controlling the switch tube. There are multiple current channels between modules. The method includes:

Step S11: Send a switch control signal to the switch tube;

Step S12: Monitor the current driving voltage of the switch tube and obtain the target voltage value;

Step S13: Determine the actual target time required for the switch tube to fall from Vce to the target voltage value or rise from zero to the target voltage value, and determine whether the switch tube falls from Vce to the target voltage value or rises from zero to the target under ideal circumstances. The ideal time required for the voltage value; where, Vce is the voltage when the switch tube is turned on and off;

Step S14: Determine the target difference between the target duration and the ideal duration, and adjust the current channel between the control module and the switch tube according to the target difference to ensure that the driving voltage of the switch tube is The curve reaches the preset voltage curve.

The control method provided in this embodiment can be applied to a control circuit containing a switch tube, and in the control circuit, multiple current channels are provided between the switch tube and the control module used to control the switch tube. This method can be used to control the driving voltage of the switch tube in the control circuit in real time and avoid the situation where the driving voltage of the switch tube is too large or too small, which can further improve the overall reliability of the control circuit during operation.

Please refer to Figure 2. Figure 2 is a structural diagram of a control circuit provided by an embodiment of the present invention. In the control circuit shown in Figure 2, a control module, a switch tube and a voltage acquisition module are provided, and the control module There are also multiple current channels between the switch tube and the switch tube. The names of these current channels are D0, D1, D2, D3, D4, D5, D6 and D7 respectively. Among them, each current channel between the control module and the switch tube can be set as a current channel with the same current conduction value, or can be set as a current channel with unequal current conduction values, which is not specifically limited here.

It should be noted that in actual applications, the control module can be any logic device with control functions, such as: CPLD (Complex Programmable Logic Device, complex programmable logic device), FPGA (Field Programmable Gate Array, field programmable Logic gate array) or MCU (Micro Controller Unit, micro control unit), etc.

In this method, the control module in the control circuit first sends a switching control signal to the switching tube, and monitors the current driving voltage of the switching tube to obtain the target voltage value. Among them, the switch control signal can be a turn-off signal used to turn off the switch tube, a conduction signal used to turn on the switch tube, or a PWM (PWM signal) used to control the switch tube. Pulse Width Modulation (Pulse Width Modulation) signal, here should be determined based on the actual operating status of the switch tube in the control circuit.

If the switch tube changes from the off state to the on state under the action of the switch control signal, then the control module needs to determine the actual target time required for the switch tube to drop from Vce to the target voltage value, and determine the ideal switching tube. The ideal time required for Vce to drop to the target voltage value under certain conditions. Among them, Vce refers to the voltage when the switch tube is turned on and off. If the switch tube changes from the on state to the off state under the action of the switch control signal, then the control module needs to determine the actual target time required for the switch tube to rise from zero to the target voltage value, and determine the time required for the switch tube to rise from zero to the target voltage value. The ideal time required to rise from zero to the target voltage value under ideal conditions.

Please refer to Figure 3. Figure 3 is a schematic diagram of the change of the switching tube when it drops from Vce to zero and rises from zero to Vce under ideal conditions. In Figure 3, T0 represents the turn-on time of the switch tube, and T1 represents the turn-off time of the switch tube.

In the graph shown in Figure 3, Ton1 represents the time required for the driving voltage of the switching tube to drop from Vce to 0.75Vce from the moment the switch is turned on; Ton2 represents the time required for the switching tube to start from the moment the switch is turned on. The time required for the driving voltage to drop from Vce to 0.5Vce; Ton3 represents the time required for the switching tube to start from the moment when the switch is turned on, and the time required for the driving voltage of the switching tube to drop from Vce to 0.25Vce; Toff1 represents the time required for the switching tube to start from the moment of turning off. , the time required for the driving voltage of the switching tube to rise from zero to 0.25Vce; Toff2 represents the time required for the driving voltage of the switching tube to rise from zero to 0.5Vce from the moment the switching tube is turned off; Toff3 represents the time required for the switching tube to rise from zero to 0.5Vce; Toff3 represents the time required for the switching tube to rise from zero to 0.5Vce. Starting from the turn-off moment, the time required for the driving voltage of the switch tube to rise from zero to 0.75Vce.

When the actual target time required for the switching tube to drop from Vce to the target voltage value or rise from zero to the target voltage value is determined, and the switching tube is ideally required to drop from Vce to the target voltage value or rise from zero to the target voltage value After the ideal duration required, calculate the target difference between the target duration and the ideal duration.

If the target difference is greater than the preset threshold, it means that the driving voltage of the switching tube is smaller than the expected driving voltage. At this time, the driving voltage between the control module and the switching tube can be adjusted according to the target difference. Make adjustments to increase the driving voltage of the switching tube, so that the driving voltage curve of the switching tube can reach the preset voltage curve. If the target difference is smaller than the preset threshold, it means that the driving voltage of the switching tube is greater than the expected driving voltage. At this time, the driving voltage between the control module and the switching tube can be adjusted according to the target difference. Adjust, and thereby reduce the driving voltage of the switching tube, so that the driving voltage curve of the switching tube can reach the preset voltage curve.

In addition, in practical applications, the driving voltage of the switching tube can be monitored in real time, or the driving voltage of the switching tube can be monitored at a preset sampling point. For example: in order to more conveniently calculate the target difference, you can also perform subsequent process steps when the driving voltage of the switch tube is detected to jump to 0.25Vce, 05Vce, or 0.75Vce.

From the above discussion, it can be seen that through the method provided by this embodiment, the driving voltage of the switching tube in the control circuit can be controlled in real time, and the driving voltage of the switching tube can be prevented from being too large or excessive. Therefore, through this method, the overall reliability of the control circuit during operation can be further improved. Moreover, the driving voltage of the switching tube is relatively easy to detect during actual operation. Therefore, using this method to control and adjust the driving voltage of the switching tube can relatively reduce the implementation difficulty of regulating the driving voltage of the switching tube. .

It can be seen that in the driving voltage control method provided in this embodiment, multiple current channels are set in advance between the control module of the control circuit and the switch tube; after the control module sends the switch control signal to the switch tube, it will monitor the switch The current driving voltage of the tube is used to obtain the target voltage value; then, the actual target time required when the switching tube drops from Vce to the target voltage value or rises from zero to the target voltage value is determined, and the ideal time required for the switching tube to drop from Vce is determined. The ideal time required to reach the target voltage value or rise from zero to the target voltage value; finally, determine the target difference between the target time length and the ideal time length, and adjust the current between the control module and the switch tube according to the target difference value. The channel is adjusted, which is equivalent to real-time regulation of the driving voltage of the switching tube according to the actual operating status of the control circuit, and enables the driving voltage curve of the switching tube to reach the preset voltage curve. Compared with the existing technology, this method can control the driving voltage of the switch tube in the control circuit in real time, avoiding the situation where the driving voltage of the switch tube is too large or too small. At the same time, it can also conveniently control the switch. The tube adjusts the opening and closing curves. Therefore, this method can further improve the overall reliability of the control circuit during operation.

Based on the above embodiments, this embodiment further explains and optimizes the technical solution. As a preferred implementation manner, the switching tube is specifically an IGBT, a MOS tube, or a triode.

In this embodiment, the switch tube in the control circuit can be either IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) or MOS (Metal Oxide Semiconductor Field Effect Transistor, metal oxide semiconductor field effect transistor). tube or triode. Because IGBT, MOS tube and triode are all common control switching tubes in the control circuit, when the switching tube in the control circuit is set to IGBT, MOS tube or triode, the control method can be further provided in practical applications. universality in.

Based on the above embodiment, this embodiment further explains and optimizes the technical solution. As a preferred implementation mode, the above steps: the process of sending a switch control signal to the switch tube, including include:

The switching control signal is sent to the switch tube through the target current channel; where the target current channel is any one of the plurality of current channels.

It can be understood that because any current channel between the switch tube and the control module can establish the electrical connection relationship between the switch tube and the control module, therefore, in the actual operation process, in order to be able to more quickly and conveniently By controlling and adjusting the driving voltage of the switch tube in the control circuit, the switching control signal can be sent to the switch tube through the target current channel.

As a preferred embodiment, after the above step of sending a switching control signal to the switching tube, the process further includes:

Detect the signal fed back by the switch tube, obtain the target feedback signal, and determine whether the target feedback signal is consistent with the preset feedback signal; wherein, the preset feedback signal is a signal set according to Vce and the current conduction value of the target current channel;

What can be imagined is that when there are multiple current channels with different current conduction values between the switch tube and the control module, if the switch tube and the control module are connected through only one current channel, then each current channel will When the switch tube and control module are in the conductive state, they will have their corresponding current conduction values. Therefore, based on this property characteristic of the current channel, it can be accurately determined whether a certain current channel between the switch tube and the control module is in a conductive state.

Specifically, after the switch control signal is sent to the switch tube through the target current channel, the signal fed back by the switch tube is detected to obtain the target feedback signal. If the target feedback signal is consistent with the preset feedback signal, it means that the target current channel is successfully opened; If the target feedback signal is inconsistent with the preset feedback signal, it means that the target current channel has not been successfully opened.

Please refer to Figure 4. Figure 4 is a schematic diagram of the feedback signal of the switch tube when the control module sends a switch control signal to the switch tube through each current channel. In Figure 4, S0 represents the feedback signal of the switch tube when the control module sends a switch control signal to the switch tube through the current channel D0; S1 represents the feedback signal of the switch tube when the control module sends a switch control signal to the switch tube through the current channel D1. ;S2 means that when the control module sends a switch control signal to the switch tube through the current channel D2, the The feedback signal of the switch tube; S7 represents the feedback signal of the switch tube when the control module sends the switch control signal to the switch tube through the current channel D7.

Obviously, through the technical solution provided by this embodiment, it can be accurately determined whether the target current channel between the switch tube and the control module is successfully opened.

Based on the above embodiments, this embodiment further explains and optimizes the technical solution. As a preferred implementation mode, the above steps: determine whether the switching tube drops from Vce to the target voltage value or rises from zero to the target voltage under ideal conditions. The ideal length of time required for the process includes:

Determine the ideal time required for the switching tube to fall from Vce to the target voltage value or rise from zero to the target voltage value under ideal circumstances according to the preset mapping relationship;

Among them, the preset mapping relationship includes: the corresponding relationship between each voltage value and time in the process of the switch tube falling from Vce to zero under ideal conditions, and the corresponding relationship between each voltage value and time in the process of the switch tube rising from zero to Vce under ideal conditions. correspondence between them.

In this embodiment, in order to enable the control module to more quickly determine the ideal time required for the switch tube to fall from Vce to the target voltage value or rise from zero to the target voltage value under ideal circumstances, the switch is also pre-created The preset mapping relationship between each driving voltage and time on the tube. Among them, the preset mapping relationship includes not only the corresponding relationship between each voltage value and time during the process of the switch tube falling from Vce to zero under ideal conditions, but also the process during which the switch tube rises from zero to Vce under ideal conditions. Correspondence between each voltage value and time.

It is conceivable that after the preset mapping relationship between each driving voltage and time of the switching tube under ideal conditions is created, the control module in the control circuit can more quickly determine the switching tube according to the preset mapping relationship. The ideal length of time required for Vce to fall to the target voltage value or rise from zero to the target voltage value under ideal conditions.

Based on the above embodiments, this embodiment further explains and optimizes the technical solution. As a preferred implementation manner, the current conduction values of multiple current channels are in a proportional increasing relationship, and the increasing ratio is equal to the minimum current in the current channel. The conduction value is set according to the control accuracy of the control circuit.

In this embodiment, when setting the current conduction values of multiple current channels between the switch tube and the control module, the current conduction values of the multiple current channels can be set according to a proportional increasing relationship, and, The incremental ratio between multiple current channels and the minimum current conduction value in the current channel can also be set according to the control accuracy required by the control circuit.

Specifically, the current conduction values between multiple current channels can be set according to the binary proportional increasing relationship, and the control accuracy of the driving current on the switch tube is set to 0.1A. Here again, the control circuit shown in Figure 2 is taken as an example for detailed explanation. In practical applications, the current conduction value of current channel D0 can be set to 0.1A, the current conduction value of current channel D1 can be set to 0.2A, the current conduction value of current channel D2 can be set to 0.4A, and the current conduction value of current channel D2 can be set to 0.4A. Set the current conduction value of channel D3 to 0.8A, set the current conduction value of current channel D4 to 1.6A, set the current conduction value of current channel D5 to 3.2A, and set the current conduction value of current channel D6. is 6.4A, and the current conduction value of current channel D7 is set to 12.8A.

In this case, the current conduction value between the switch tube and the control module can be combined to a conduction current value of any one decimal place in the range of 0.1 to 25.5A. If 1 is used to represent the conduction of the current channel and 0 is used to represent the off of the current channel, then the current channel names are arranged in order from high to low. 0000 0001 represents 0.1A, 0000 0010 represents 0.2A, and 0000 0100 It represents 0.4A, 0000, 1000 represents 0.8A, etc., I won’t go into details here.

Obviously, through the technical solution provided by this embodiment, the driving voltage of the switching tube can be controlled and adjusted more accurately.

Please refer to FIG. 5 . FIG. 5 is a flow chart for regulating the driving voltage of the switching tube according to an embodiment of the present invention. As a preferred implementation, the above step: the process of adjusting the current channel between the control module and the switch tube according to the target difference value includes:

Step S141: Determine whether the target difference is equal to the preset threshold; wherein, the control module sends a switch control signal to the switch tube through the preset current channel;

Step S142: If the target difference is equal to the preset threshold, there is no need to adjust the current channel between the control module and the switch tube, and it is determined that the driving voltage curve of the switch tube reaches the preset voltage curve;

Step S143: If the target difference is greater than the preset threshold, increase the number of conduction current channels between the control module and the switch tube according to the target difference, and repeatedly monitor the current driving voltage of the switch tube to obtain the target voltage value. steps until the target difference equals the preset threshold;

Step S144: If the target difference is less than the preset threshold, reduce the number of conduction current channels between the control module and the switch tube according to the target difference, and repeatedly monitor the current state of the switch tube. Driving the voltage is the step of obtaining the target voltage value until the target difference equals the preset threshold.

In this embodiment, in order to better regulate the driving voltage of the switch tube, the control module can also send a switching control signal to the switch tube through a preset current channel. For example: the control module can conduct current channels D0, D1 and D2 at the same time to send switching control signals to the switching tube. Then, the current channels between the switch tube and the control module are increased or decreased based on the current channels D0, D1 and D2.

Specifically, after step S140 is completed: determining the target difference between the target duration and the ideal duration, in order to determine whether the current driving voltage of the switching tube is the desired driving voltage expected by the switching tube, it is also necessary to determine whether the target difference is the same as the predetermined driving voltage. Set the size between thresholds. If the target difference is equal to the preset threshold, it means that the current driving voltage of the switching tube has reached the desired driving voltage expected by the switching tube. At this time, there is no need to adjust the current channel between the control module and the switching tube.

If the target difference is greater than the preset threshold, it means that the current driving voltage of the switching tube is smaller than its expected driving voltage. At this time, it is necessary to conduct the current channel between the control module and the switching tube according to the target difference. The number of passes is increased, and step S12 is repeated until the target difference between the target duration and the ideal duration is equal to the preset threshold, which means that the current driving voltage of the switch tube has reached the desired driving voltage of the switch tube.

If the target difference is less than the preset threshold, it means that the current driving voltage of the switching tube is larger than its expected driving voltage. At this time, it is necessary to conduct the current channel between the control module and the switching tube according to the target difference. The number of passes is reduced, and step S12 is repeated until the target difference between the target duration and the ideal duration is equal to the preset threshold, which means that the current driving voltage of the switch tube has reached the desired driving voltage of the switch tube.

It should be noted that in this embodiment, the target voltage value, target duration, ideal duration and target difference are all variable values. On the one hand, this is because the corresponding values of the switch tube will change during operation, and on the other hand, the corresponding values of the switch tube will change. On the one hand, this is because the current path between the switch tube and the control module will also change.

Obviously, through the technical solution provided by this embodiment, the driving voltage value of the switching tube can be accurately and quickly adjusted to the desired driving voltage value.

Based on the content disclosed in the foregoing embodiments, here is an example of driving the above-mentioned switch tube. The voltage regulation process is described in detail. This embodiment still takes the control circuit shown in Figure 2 as an example for detailed explanation. It is assumed that the current conduction values of the current channels D0, D1, D2, D3, D4, D5, D6 and D7 are 0.1A, 0.2A and 0.4 respectively. A, 0.8A, 1.6A, 3.2A, 6.4A and 12.8A.

First, the control module in the control circuit sends a conduction signal to the switch tube through the current channel D6, detects the signal fed back by the switch tube, obtains the target feedback signal, and determines whether the target feedback signal is consistent with the signal S6 corresponding to the current channel D6. If If the target feedback signal is consistent with the signal S6 corresponding to the current channel D6, it means that the current channel D6 is successfully opened; if the target feedback signal is inconsistent with the signal S6 corresponding to the current channel D6, it means that the current channel D6 is not successfully opened.

Please refer to Figure 6. Figure 6 is a schematic diagram of regulating the driving voltage of the switch tube through the current channel D6 in Figure 2. Specifically, when the driving voltage of the switch tube reaches 0.5Vce, the actual time Ton1 required for the switch tube to drop from Vce to 0.5Vce is obtained, and according to the preset mapping relationship, it is determined that the switch tube drops from Vce to 0.5 under ideal circumstances. The ideal duration Ton1-0 required when Vce is reached, and then determine the difference Δt between Ton1 and Ton1-0. If the difference Δt is greater than the preset threshold, it means that the current driving voltage of the switch tube is equal to its expected driving voltage. voltage, at this time just keep the current channel D6 turned on. In Figure 6, curve 1 represents the corresponding relationship between the change value of the driving voltage of the switching tube and time under actual conditions, and curve 2 represents the corresponding relationship between the changing value of the driving voltage of the switching tube and time under ideal conditions.

If the difference Δt is greater than the preset threshold, it means that the current driving voltage of the switching tube is smaller than its expected driving voltage value. At this time, in order to more accurately regulate the driving voltage of the switching tube, you can maintain On the basis of the original current channel D6 being turned on, the current channel D0 is turned on again, and it is determined whether the difference Δt between Ton2 and Ton2-0 is equal to the preset threshold. Among them, Ton2 is the actual time required for the switching tube to drop from Vce to 0.25Vce, and Ton2-0 is the time required for the switching tube to drop from Vce to 0.25Vce under ideal circumstances. If the difference Δt between Ton2 and Ton2-0 is equal to the preset threshold, it means that the current driving voltage of the switch tube has reached its expected driving voltage value. At this time, it is only necessary to keep the current channels D6 and D0 turned on. Please refer to Figure 7 for details. Figure 7 is a schematic diagram of regulating the driving voltage of the switch tube through the current channels D6 and D0 in Figure 2. It can be seen from Figure 7 that by adjusting the current channel between the switch tube and the control module, the driving voltage of the switch tube can be made to reach its ideal driving voltage.

Obviously, through the voltage control method provided by this application, the switching tube in the control circuit can be controlled. The driving voltage of the switch can be adjusted in real time, and the driving voltage of the switching tube can be prevented from being too large or too small. This can further improve the overall reliability of the control circuit during operation.

Please refer to Figure 8. Figure 8 is a structural diagram of a driving voltage control device provided by an embodiment of the present invention. The device is applied to a control circuit containing a switch tube, a switch tube and a control module for controlling the switch tube. There are multiple current channels between them. The device includes:

The signal sending module 21 is used to send switching control signals to the switching tube;

The voltage monitoring module 22 is used to monitor the driving voltage of the switching tube and obtain the target voltage value;

The voltage judgment module 23 is used to determine the actual target time required when the switch tube drops from Vce to the target voltage value or rises from zero to the target voltage value, and determines whether the switch tube drops from Vce to the target voltage value or from zero under ideal circumstances. The ideal time required for zero to rise to the target voltage value; where, Vce is the voltage when the switch tube is turned on and off;

The channel adjustment module 24 is used to determine the target difference between the target duration and the ideal duration, and adjust the current channel between the control module and the switch tube according to the target difference, so that the driving voltage curve of the switch tube reaches the preset value. voltage curve.

The driving voltage control device provided in this embodiment has the beneficial effects of the driving voltage control method disclosed above.

Please refer to Figure 9. Figure 9 is a structural diagram of a driving voltage control device provided by an embodiment of the present invention. The device includes:

Memory 31, used to store computer programs;

The processor 32 is configured to implement the steps of a driving voltage control method as disclosed above when executing a computer program.

The driving voltage control device provided by the embodiment of the present invention has the beneficial effects of the driving voltage control method disclosed above.

Correspondingly, embodiments of the present invention also disclose a computer-readable storage medium. A computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, a driving voltage control method as disclosed above is implemented. step.

The computer-readable storage medium provided by the embodiment of the present invention has the beneficial effects of the driving voltage control method disclosed above.

Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on its differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple. For relevant details, please refer to the description in the method section.

Finally, it should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or any such actual relationship or sequence between operations. Furthermore, the terms "comprises," "comprises," or any other variations thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment. Without further limitation, an element qualified by the statement "comprises a..." does not exclude the presence of additional identical elements in the process, method, article, or device that includes the element.

The driving voltage control method, device, equipment and medium provided by the present invention have been introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation modes of the present invention. The description of the above embodiments is only for It helps to understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the field, there will be changes in the specific implementation and application scope according to the idea of the present invention. In summary, the content of this specification It should not be construed as a limitation of the invention.

Claims

A driving voltage control method, characterized in that it is applied to a control circuit containing a switching tube, and a plurality of current channels are provided between the switching tube and a control module used to control the switching tube. The method includes :

Send a switch control signal to the switch tube;

Monitor the current driving voltage of the switch tube to obtain the target voltage value;

Determine the actual target time required when the switch tube drops from Vce to the target voltage value or rises from zero to the target voltage value, and determine whether the switch tube drops from the Vce to the target voltage value under ideal circumstances. The target voltage value or the ideal time required to rise from zero to the target voltage value; wherein, the Vce is the voltage when the switch tube is turned on and off;

Determine the target difference between the target duration and the ideal duration, and adjust the current channel between the control module and the switch tube according to the target difference, so that the driving of the switch tube The voltage curve reaches the preset voltage curve.
The control method according to claim 1, characterized in that the switch tube is specifically an IGBT, a MOS tube or a transistor.
The control method according to claim 1, characterized in that the process of sending a switch control signal to the switch tube includes:

The switching control signal is sent to the switch tube through a target current channel; wherein the target current channel is any one of a plurality of current channels.
The control method according to claim 3, characterized in that after the process of sending a switching control signal to the switching tube, it further includes:

Detect the signal fed back by the switch to obtain a target feedback signal, and determine whether the target feedback signal is consistent with a preset feedback signal; wherein the preset feedback signal is based on the Vce and the target current channel. The signal set by the current conduction value;

If the target feedback signal is consistent with the preset feedback signal, it is determined that the target current channel is successfully opened;

If the target feedback signal is inconsistent with the preset feedback signal, it is determined that the target current channel has not been successfully opened.
The control method according to claim 1, characterized in that said determining said switch The process of the ideal length of time required for the tube to fall from the Vce to the target voltage value or rise from zero to the target voltage value under ideal circumstances, including:

The ideal time required for the switch tube to fall from the Vce to the target voltage value or rise from zero to the target voltage value is determined according to the preset mapping relationship; wherein, the preset The mapping relationship includes: the corresponding relationship between each voltage value and time in the process of the switch tube falling from the Vce to zero under ideal conditions, and the corresponding relationship between each voltage value in the process of the switch tube rising from zero to the Vce under ideal conditions. Correspondence between voltage value and time.
The control method according to claim 1, characterized in that the current conduction values of the plurality of current channels are in a proportional increasing relationship, and the increasing proportion and the minimum current conduction value in the current channel are determined according to the control accuracy of the control circuit. set up.
The control method according to claim 6, characterized in that the process of adjusting the current channel between the control module and the switch tube according to the target difference includes:

Determine whether the target difference is equal to a preset threshold; wherein the control module sends the switch control signal to the switch tube through a preset current channel;

If the target difference is equal to the preset threshold, there is no need to adjust the current channel between the control module and the switch tube, and it is determined that the driving voltage curve of the switch tube reaches the preset voltage curve. ;

If the target difference is greater than the preset threshold, the number of conduction current channels between the control module and the switch tube is increased according to the target difference, and the monitoring is performed repeatedly. The step of obtaining the target voltage value from the current driving voltage of the switch tube until the target difference equals the preset threshold;

If the target difference is less than the preset threshold, the number of conduction current channels between the control module and the switch tube is reduced according to the target difference, and the monitoring is performed repeatedly. The step of obtaining the target voltage value based on the current driving voltage of the switch tube until the target difference equals the preset threshold.
A driving voltage control device, characterized in that it is applied to a control circuit containing a switching tube, and a plurality of current channels are provided between the switching tube and a control module used to control the switching tube. The device includes :

A signal sending module, used to send switching control signals to the switching tube;

A voltage monitoring module is used to monitor the current driving voltage of the switch tube and obtain the target voltage value;

The voltage judgment module is used to determine the actual target time required when the switch tube drops from Vce to the target voltage value or rises from zero to the target voltage value, and determines whether the switch tube starts from the target voltage value under ideal circumstances. The ideal time required for the Vce to drop to the target voltage value or to rise from zero to the target voltage value; wherein, the Vce is the voltage when the switch tube is turned on and off;

A channel adjustment module is used to determine the target difference between the target duration and the ideal duration, and adjust the current channel between the control module and the switch tube according to the target difference, so that The driving voltage curve of the switching tube reaches the preset voltage curve.
A driving voltage control device, characterized by including:

Memory, used to store computer programs;

A processor, configured to implement the steps of a driving voltage control method according to any one of claims 1 to 7 when executing the computer program.
A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, a driver according to any one of claims 1 to 7 is implemented. Voltage control method steps.