CN215185826U - Direct-current high-voltage ultrahigh-power IGBT short-circuit protection circuit - Google Patents
Direct-current high-voltage ultrahigh-power IGBT short-circuit protection circuit Download PDFInfo
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Abstract
The application relates to a direct-current high-voltage ultrahigh-power IGBT short-circuit protection circuit. The main driving module and the auxiliary driving module are used for respectively and synchronously controlling the plurality of parallel IGBTs, and the overcurrent detection module is used for detecting the current of the output end, so that the on-off control of the direct-current high-voltage ultrahigh-power supply can be realized, the power supply can be switched off within microsecond-level time after the load is in short circuit or overcurrent and other abnormalities, the problem that the response time of the conventional short-circuit protection device is too long is solved, and the safety of the load and related circuits is effectively protected. The short-circuit protection circuit can be used in various occasions such as traction, railway power supply and the like, and effectively protects electrical equipment.
Description
Technical Field
The application relates to the technical field of short-circuit protection, in particular to a direct-current high-voltage ultrahigh-power IGBT short-circuit protection circuit.
Background
The existing high-power short-circuit protection devices are tripped in a mechanical mode, and the response time is millisecond. When the load has overcurrent or short-circuit fault, because the response time of the protection device is too long, the switch device and the load are easily damaged, and the protection tripping of a superior power supply department is also easily triggered, so that the normal use of other power supply lines is influenced. Therefore, a dc high-voltage and ultra-high power circuit protection switch with a fast enough response speed is needed.
SUMMERY OF THE UTILITY MODEL
The application provides a direct current high voltage super power IGBT short-circuit protection circuit to solve the problem of the overlong response time of a high-power short-circuit protection device in the prior art.
The above object of the present application is achieved by the following technical solutions:
the embodiment of the application provides a direct current high pressure super power IGBT short-circuit protection circuit, it includes:
the system comprises a plurality of IGBTs connected in parallel, a main driving module, at least one auxiliary driving module and an overcurrent detection module; wherein the content of the first and second substances,
the collectors of the IGBTs are connected and then used as the input end of a direct-current high-voltage ultrahigh-power supply; the gate pole of each IGBT is connected with the control signal output end of the main driving module or the control signal output end of the auxiliary driving module; the emitting electrodes of the IGBTs are connected and then used as the output end of the direct-current high-voltage ultrahigh-power supply and are used for connecting a load;
the master drive module is connected with the slave drive module through a parallel connection interface, and the master drive module drives the slave drive module to synchronously act after receiving a trigger signal;
the overcurrent detection module is connected with a detection signal input end of the main drive module and used for detecting the output current of the output end of the direct-current high-voltage ultrahigh-power supply and sending the output current to the main drive module; and when the main driving module judges that the output current exceeds a preset value, the main driving module and the auxiliary driving module synchronously control all the IGBTs to be in a turn-off state so as to cut off the output of the direct-current high-voltage ultrahigh-power supply.
Optionally, the short-circuit protection circuit further includes a remote control module connected to the main driving module;
the remote control module is used for sending a trigger signal to the main driving module based on user operation so as to control the working states of the main driving module and the auxiliary driving module.
Optionally, the remote control module comprises an alarm unit;
and when judging that the output current exceeds a preset value, the main driving module also sends an alarm signal to the remote control module so as to enable the alarm unit to alarm.
Optionally, the remote control module is connected to the main driving module through an optical fiber.
Optionally, the overcurrent detection module includes a hall current sensor.
Optionally, the power input end of the main driving module is connected to a power supply through a high-voltage isolation module.
Optionally, the short-circuit protection circuit further includes a temperature detection module connected to a detection signal input end of the main driving module;
the temperature detection module is used for detecting the ambient temperature of the short-circuit protection circuit and sending the detected ambient temperature to the main driving module; and when the main driving module judges that the environmental temperature exceeds a preset value, the main driving module and the auxiliary driving module synchronously control all the IGBTs to be in a turn-off state so as to cut off the output of the direct-current high-voltage ultrahigh-power supply.
Optionally, the short-circuit protection circuit further includes a heat dissipation system;
the heat dissipation system is used for reducing the ambient temperature of the short-circuit protection circuit during working.
Optionally, the master drive module includes a drive chip with a model number of 1SP0635V, and the slave drive module includes a drive chip with a model number of 1SP 0635D.
Optionally, the number of the IGBTs is 3, and the number of the slave driving modules is 2.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
in the direct-current high-voltage ultrahigh-power IGBT short-circuit protection circuit provided by the embodiment of the application, the master driving module and the slave driving module are utilized to synchronously control the plurality of parallel IGBTs respectively, and the output end current is detected through the overcurrent detection module, so that the on-off control of the direct-current high-voltage ultrahigh-power supply can be realized, after the load is in short circuit or overcurrent and other abnormalities, the power supply can be switched off within microsecond-level time, the problem that the response time of the conventional short-circuit protection device is too long is solved, and the safety of the load and related circuits is effectively protected. The short-circuit protection circuit can be used in various occasions such as traction, railway power supply and the like, and effectively protects electrical equipment.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic structural diagram of a direct-current high-voltage ultra-high-power IGBT short-circuit protection circuit provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of another direct-current high-voltage ultra-high-power IGBT short-circuit protection circuit provided in the embodiment of the present application;
wherein: 1-IGBT; 2-a main drive module; 3-a slave drive module; 4-an over-current detection module; 5-a remote control module; 6-high voltage isolation module; 7-a temperature detection module; 8-heat dissipation system.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
In order to solve the problem, the application provides a direct current high voltage super power IGBT short-circuit protection circuit to when overcurrent or short circuit takes place at the load, the load power is shut off fast, avoids the load to damage. Specific embodiments are illustrated in detail by the following examples.
Examples
Referring to fig. 1, fig. 1 is a schematic structural diagram of a short-circuit protection circuit of a direct-current high-voltage ultra-high-power IGBT provided in an embodiment of the present application, and as shown in fig. 1, the short-circuit protection circuit includes at least the following structures:
a plurality of parallel IGBTs 1, a master drive module 2, at least one slave drive module 3 (2 slave drive modules 3 in fig. 1), and an overcurrent detection module 4; wherein the content of the first and second substances,
the collectors (C poles) of the IGBTs 1 are connected and then used as the input end of the direct-current high-voltage ultra-high power supply; the gate (G pole) of each IGBT1 is connected with the control signal output end of the master drive module 2 or the control signal output end of the slave drive module 3; the emitters (E poles) of the IGBTs 1 are connected and then used as the output end of the direct-current high-voltage ultrahigh-power supply and are used for connecting a load;
the main driving module 2 is connected with the slave driving module 3 through a parallel connection port, and the main driving module 2 drives the slave driving module 3 to synchronously act after receiving a trigger signal;
the overcurrent detection module 4 is connected with a detection signal input end of the main drive module 2, and is used for detecting the output current of the output end of the direct-current high-voltage ultrahigh-power supply and sending the output current to the main drive module 2; when the output current is judged to exceed the preset value, the master drive module 2 and the slave drive module 3 synchronously control each IGBT1 to be in a turn-off state so as to cut off the output of the direct-current high-voltage ultrahigh-power supply.
Specifically, during normal operation, the master drive module 2 and the slave drive module 3 respectively output high levels to the gate electrodes of the corresponding IGBTs 1, and at the moment, the IGBTs 1 are all in a conducting state, so that after a direct-current high-voltage ultrahigh-power supply is input to the collector electrode of the IGBT1, the direct-current high-voltage ultrahigh-power supply can be normally output from the emitter electrode of the IGBT1 and supplies power to a load after being connected with the load; during the period, the overcurrent detection module 4 continuously detects the current of the output end and sends the current to the main drive module 2, when the load is in overcurrent or short circuit, the current of the output end can be obviously increased, when the current is larger than a preset value (the preset value can be preset by a user according to an actual application scene), the main drive module 2 and the auxiliary drive module 3 are changed to output low level to the gate pole of the IGBT1, so that a plurality of IGBTs 1 are all turned off, the power supply of the load is cut off, the short circuit and overcurrent protection effect is achieved, and the load or a short circuit protection circuit is prevented from being burnt.
Wherein, only main drive module 2 external power supply, power supply provides the required power of main drive module 2 normal work to, main drive module 2 and follow drive module 3 are connected through the parallel connection interface, send trigger signal and provide the required power of follow drive module 3 normal work by main drive module 2 to make follow drive module 2 synchronous motion from drive module 3.
Therefore, the master and slave driving modules 3 are used for respectively and synchronously controlling the plurality of parallel IGBTs 1, and the current of the output end is detected through the overcurrent detection module 4, so that the on-off control of the direct-current high-voltage ultrahigh-power supply can be realized, after the load is in short circuit or overcurrent and other abnormalities, the power supply can be switched off within microsecond time, the problem of overlong response time of the conventional short-circuit protection device is solved, and the safety of the load and related circuits is effectively protected. The short-circuit protection circuit can be used in various occasions such as traction, railway power supply and the like, and effectively protects electrical equipment.
For better practical application, on the basis of the above scheme, the embodiment of the present application further provides an improved scheme, which is described in detail below with reference to fig. 2, where fig. 2 provides a schematic structural diagram of another dc high-voltage ultra-high power IGBT1 short-circuit protection circuit for the embodiment of the present application.
The master drive module 2 and the slave drive module 3 in fig. 2 are respectively implemented by drive chips with models 1SP0635V and 1SP0635D, and the high level signal and the low level signal output to the gate of the IGBT can be implemented by duty ratios of 100% and 0%, respectively. It should be understood that the chip type is merely exemplary, and other similar chip implementations may be used in practice. In the short-circuit protection circuit shown in fig. 2, the number of the IGBTs 1 is 3, and the number of the slave drive modules 3 is 2. However, since the 1SP0635V and 1SP0635D chips each include 2 identical parallel ports, the number of slave drive modules 3 may be 1 to 3, and the number of IGBTs 1 may be 1 more than the number of slave drive modules 3, as required.
In some embodiments, as shown in fig. 2, the short-circuit protection circuit further comprises a remote control module 5 connected to the main drive module 2;
the remote control module 5 is configured to send a trigger signal to the master drive module 2 based on a user operation to control the operating states of the master drive module 2 and the slave drive module 3. That is, the user can send a trigger signal to the main driving module 2 through the remote control module 5, so as to remotely control the start and stop of the protection circuit. In practical applications, the remote control module 5 may be connected to the main driving module 2 through an optical fiber.
Furthermore, in some embodiments, the remote control module 5 comprises an alarm unit; therefore, when the main driving module 2 judges that the output current exceeds the preset value, the main driving module also sends an alarm signal to the remote control module 5 so as to enable the alarm unit to give an alarm. The alarm may be an audible and visual alarm, and may be specifically set according to an actual situation, which is not limited in this embodiment.
Furthermore, in some embodiments, the over-current detection module 4 comprises a hall current sensor. The Hall current sensor is a detection device based on Hall effect, and the Hall current sensor has the advantages that non-contact detection can be realized, namely, the overcurrent detection module 4 is not required to be connected to the output end of the direct-current high-voltage ultrahigh-power supply.
In addition, in some embodiments, the power input end of the main driving module 2 is connected to the power supply through the high voltage isolation module 6. Considering that the voltage difference between the direct-current high-voltage ultrahigh-power supply and the power supply of the main driving module 2 is very large, in order to avoid high-voltage interference, a high-voltage isolation module 6 is arranged to isolate high voltage.
In addition, in some embodiments, the short-circuit protection circuit further includes a temperature detection module 7 connected to a detection signal input terminal of the main driving module 2; the temperature detection module 7 is used for detecting the ambient temperature of the short-circuit protection circuit and sending the detected ambient temperature to the main driving module 2; when the main driving module 2 judges that the environmental temperature exceeds the preset value, the main driving module and the auxiliary driving module 3 synchronously control each IGBT1 to be in a turn-off state so as to cut off the output of the direct-current high-voltage ultrahigh-power supply.
Specifically, because short-circuit protection circuit operation in-process can produce the heat, in order to avoid the potential safety hazard that overheated leads to, consequently set up temperature detection module 7 and detect ambient temperature, when ambient temperature was too high, main drive module 2 and follow drive module 3 also synchronous action and cut off power output to reduce the temperature.
In addition, in some embodiments, the short-circuit protection circuit further comprises a heat dissipation system 8; the short-circuit protection circuit is used for reducing the ambient temperature of the short-circuit protection circuit when in work. Specifically, in order to accelerate heat dissipation, the present embodiment further sets a heat dissipation system 8, wherein the heat dissipation system 8 may be set to start or stop under manual control of a user, or may be set to start or stop under automatic control of the system according to an ambient temperature.
That is, besides the basic overcurrent protection function, the circuit of the above embodiment further includes a perfect overheat and high voltage isolation system, so as to better meet the requirements of practical applications.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A direct current high voltage super power IGBT short-circuit protection circuit which is characterized by comprising:
the system comprises a plurality of IGBTs connected in parallel, a main driving module, at least one auxiliary driving module and an overcurrent detection module; wherein the content of the first and second substances,
the collectors of the IGBTs are connected and then used as the input end of a direct-current high-voltage ultrahigh-power supply; the gate pole of each IGBT is connected with the control signal output end of the main driving module or the control signal output end of the auxiliary driving module; the emitting electrodes of the IGBTs are connected and then used as the output end of the direct-current high-voltage ultrahigh-power supply and are used for connecting a load;
the master drive module is connected with the slave drive module through a parallel connection interface, and the master drive module drives the slave drive module to synchronously act after receiving a trigger signal;
the overcurrent detection module is connected with a detection signal input end of the main drive module and used for detecting the output current of the output end of the direct-current high-voltage ultrahigh-power supply and sending the output current to the main drive module; and when the main driving module judges that the output current exceeds a preset value, the main driving module and the auxiliary driving module synchronously control all the IGBTs to be in a turn-off state so as to cut off the output of the direct-current high-voltage ultrahigh-power supply.
2. The short-circuit protection circuit according to claim 1, further comprising a remote control module connected to the main drive module;
the remote control module is used for sending a trigger signal to the main driving module based on user operation so as to control the working states of the main driving module and the auxiliary driving module.
3. The short-circuit protection circuit of claim 2, wherein the remote control module comprises an alarm unit;
and when judging that the output current exceeds a preset value, the main driving module also sends an alarm signal to the remote control module so as to enable the alarm unit to alarm.
4. The short-circuit protection circuit of claim 2, wherein the remote control module is connected to the main drive module by an optical fiber.
5. The short-circuit protection circuit of claim 1, wherein the over-current detection module comprises a hall current sensor.
6. The short-circuit protection circuit of claim 1, wherein the power input terminal of the main driving module is connected to a power supply through a high-voltage isolation module.
7. The short-circuit protection circuit of claim 1, further comprising a temperature detection module connected to a detection signal input of the main driving module;
the temperature detection module is used for detecting the ambient temperature of the short-circuit protection circuit and sending the detected ambient temperature to the main driving module; and when the main driving module judges that the environmental temperature exceeds a preset value, the main driving module and the auxiliary driving module synchronously control all the IGBTs to be in a turn-off state so as to cut off the output of the direct-current high-voltage ultrahigh-power supply.
8. The short-circuit protection circuit of claim 1, further comprising a heat dissipation system;
the heat dissipation system is used for reducing the ambient temperature of the short-circuit protection circuit during working.
9. The short-circuit protection circuit as claimed in claim 1, wherein the master driver module comprises a driver chip of model 1SP0635V, and the slave driver module comprises a driver chip of model 1SP 0635D.
10. The short-circuit protection circuit of claim 9, wherein the number of IGBTs is 3, and the number of slave drive modules is 2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121593537.5U CN215185826U (en) | 2021-07-12 | 2021-07-12 | Direct-current high-voltage ultrahigh-power IGBT short-circuit protection circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121593537.5U CN215185826U (en) | 2021-07-12 | 2021-07-12 | Direct-current high-voltage ultrahigh-power IGBT short-circuit protection circuit |
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| CN215185826U true CN215185826U (en) | 2021-12-14 |
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| CN202121593537.5U Active CN215185826U (en) | 2021-07-12 | 2021-07-12 | Direct-current high-voltage ultrahigh-power IGBT short-circuit protection circuit |
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- 2021-07-12 CN CN202121593537.5U patent/CN215185826U/en active Active
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Inventor after: Yuan Zhengyang Inventor after: Zhang Xiaoan Inventor after: Wang Lixin Inventor after: Chen Hongbin Inventor after: Li Shansheng Inventor after: Sun Jinfu Inventor before: Yuan Zhengyang |
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