CN209881757U - Driving device and solid-state modulator - Google Patents
Driving device and solid-state modulator Download PDFInfo
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- CN209881757U CN209881757U CN201921067425.9U CN201921067425U CN209881757U CN 209881757 U CN209881757 U CN 209881757U CN 201921067425 U CN201921067425 U CN 201921067425U CN 209881757 U CN209881757 U CN 209881757U
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Abstract
The embodiment of the utility model provides a drive arrangement and solid-state modulator relates to synchronous drive technical field. The drive device includes: the driving device comprises a driving board, a plurality of driving transformers are arranged on the driving board, and a primary coil of each driving transformer is connected in series and then connected with a driving signal source and used for synchronously transmitting a driving signal to a corresponding secondary coil after receiving the driving signal input by the driving signal source; the control end of each controllable switch tube is connected with one secondary side coil; the detection devices are arranged corresponding to the controllable switch tubes and used for detecting the current flowing through the controllable switch tubes; the driving board is connected with each detection device and used for obtaining current detected by the detection device, and when the obtained current exceeds a preset value, the driving board stops outputting driving signals to the control end of the connected controllable switch tube. Through the arrangement, the synchronism of the driving can be improved, and the rapid protection of the overcurrent can be realized.
Description
Technical Field
The present application relates to the field of synchronous driving technologies, and in particular, to a driving apparatus and a solid-state modulator.
Background
The solid-state modulator generally adopts an energy storage capacitor, a controllable switch and a pulse transformer to boost voltage so as to obtain high-voltage large-current pulse output. The controllable switch usually adopts semiconductor devices such as an IGBT (insulated gate bipolar transistor), the current on the IGBT can usually reach thousands of amperes or tens of thousands of amperes, and the peak current is larger when a load is ignited. The current of a single IGBT can not meet the application requirement at present, a plurality of IGBTs are required to be connected in parallel, and a driving device is required to be protected when the IGBT is in overcurrent.
The inventor researches and discovers that in the prior art, a plurality of driving plates are generally connected to each IGBT independently to realize one-to-one driving control, driving trigger signals are input to each driving plate in parallel, and due to the fact that internal devices of each driving plate have deviation, the time of the driving signals transmitted to each IGBT is not consistent, and therefore the problem of poor driving synchronism exists.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a driving device and a solid-state modulator to solve the problems in the prior art.
In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:
a drive device, comprising:
the driving device comprises a driving board, a plurality of driving transformers and a plurality of driving units, wherein the driving board is provided with a plurality of driving transformers, each driving transformer comprises a primary coil and a secondary coil corresponding to the primary coil, and the primary coils are connected in series and then connected with a driving signal source and used for respectively and synchronously transmitting driving signals to the corresponding secondary coils after receiving the driving signals input by the driving signal source;
the control end of each controllable switch tube is respectively connected with one secondary coil, different control ends of the controllable switch tubes are connected with different secondary coils, and the controllable switch tubes are used for acquiring driving signals output by the connected secondary coils;
the detection devices are respectively arranged corresponding to the controllable switch tubes and used for detecting the current flowing through the controllable switch tubes;
the driving board is respectively connected with each detection device and used for acquiring current detected by the detection device, and when the acquired current exceeds a preset value, the driving board stops outputting driving signals to the control end of the connected controllable switch tube.
In an alternative embodiment of the present invention, the detecting device is a current sensor.
The embodiment of the utility model provides an in the selection of preferred, the current sensor cover is located the output wiring end or the input wiring end of controllable switch tube for detect the electric current of flowing through this controllable switch tube.
The embodiment of the present invention provides a selection method, wherein the number of the driving boards is plural, and the driving transformer corresponding to the controllable switch tube is integrated with the corresponding driving board.
In the preferred selection of the embodiment of the present invention, the number of the driving boards is one, and each of the driving transformers is integrated in the same driving board.
In the preferred option of the embodiment of the present invention, the controllable switch tube is an IGBT or a MOSFET.
The embodiment of the utility model provides a solid-state modulator is still provided, include:
in the above driving device, the plurality of controllable switching tubes included in the driving device are connected in parallel;
the input end and the output end of the energy storage circuit are respectively used for being connected with the anode and the cathode of an external direct current power supply;
the primary coil of the pulse transformer is connected in series with the plurality of controllable switching tubes connected in parallel between the input end and the output end of the energy storage circuit;
the absorption circuit is connected with the primary coil of the pulse transformer in parallel;
when the driving device is switched on, the current output by the direct current power supply is transmitted to the pulse transformer through the energy storage circuit, the driving device and the absorption circuit to be boosted, so that a secondary coil of the pulse transformer outputs high-voltage pulses.
The embodiment of the utility model provides a drive arrangement and solid-state modulator are connected with drive signal source after the primary coil series connection through a plurality of driving transformers to after making the drive signal who receives this drive signal source input, produce electromagnetic induction by the same electric current in the primary coil of series connection, so that drive signal synchronous transmission is to the vice side coil that corresponds, thereby improves driven synchronism. And the controllable switching tube can be controlled to be switched off when the current flowing through the controllable switching tube detected by the detection device exceeds a preset value, so that the overcurrent protection of the controllable switching tube is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a block diagram of a solid-state modulator according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an application of a solid-state modulator according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a driving transformer according to an embodiment of the present invention.
Fig. 4 is a schematic circuit diagram of a driving device according to an embodiment of the present invention.
Fig. 5 is a schematic view of an application structure of the driving device of the present invention.
Icon: 10-a solid-state modulator; 100-a drive device; 110-a drive plate; 111-drive transformer; 120-controllable switch tube; 130-a detection device; 200-a tank circuit; 300-a pulse transformer; 400-absorption circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
As shown in fig. 1, embodiments of the present invention provide a solid state modulator 10. In detail, the input end of the solid-state modulator 10 is connected to the positive electrode and the negative electrode of the external dc power supply, and the output end is connected to the load, so as to boost the low-voltage signal output by the external dc power supply, and obtain the high-voltage signal output.
The solid-state modulator 10 may include a driving device 100, a tank circuit 200, a pulse transformer 300, and a snubber circuit 400. In detail, the driving device 100 comprises a plurality of controllable switching tubes 120 connected in parallel. The input end and the output end of the energy storage circuit 200 are respectively used for being connected with the anode and the cathode of an external direct current power supply. The primary winding of the pulse transformer 300 and the plurality of controllable switching tubes 120 connected in parallel are connected in series between the input end and the output end of the energy storage circuit 200. The absorption circuit 400 is connected in parallel to the primary coil of the pulse transformer 300.
The current output by the dc power supply is transmitted to the primary winding of the pulse transformer 300 through the energy storage circuit 200, the driving device 100 and the absorption circuit 400, and electromagnetic induction is generated by the changed current, so that the secondary winding of the pulse transformer 300 outputs high-voltage pulses.
With reference to fig. 2, the specific composition of the tank circuit 200 is not limited, and may be set according to the actual application requirement. For example, in this embodiment, the tank circuit 200 may include a first capacitor.
In detail, the positive end of the first capacitor is connected with the positive pole of the direct current power supply, and the negative end of the first capacitor is connected with the negative pole of the direct current power supply. When the driving device 100 is switched off, the direct current power supply charges the first capacitor; when the driving device 100 is turned on, the dc power supply and the first capacitor are discharged.
Optionally, the specific composition of the absorption circuit 400 is not limited, and may be set according to the actual application requirement. For example, in this embodiment, the absorption circuit 400 may include a first resistor and a second capacitor. In detail, one end of the first resistor is connected to the output end of the driving device 100, and the positive terminal of the second capacitor is connected to the other end of the first resistor, and the negative terminal is grounded.
The specific connection of the absorption circuit 400 is not limited, and may be set according to the actual application requirement. For example, in one embodiment, the absorption circuit 400 may be connected in parallel with the primary winding of the pulse transformer 300. In another embodiment, the absorption circuit 400 may be further connected in parallel with a plurality of controllable switching tubes 120 included in the driving device 100.
With reference to fig. 3 and 4, the driving apparatus 100 may include a driving board 110, a controllable switching tube 120 and a detecting device 130.
In detail, the driving board 110 is provided with a plurality of driving transformers 111, each driving transformer 111 includes a primary coil and a secondary coil corresponding to the primary coil, and the primary coils are connected in series and then connected to a driving signal source, so as to respectively and synchronously transmit the driving signal to the corresponding secondary coils after receiving the driving signal input by the driving signal source. The control end of each controllable switch tube 120 is connected to one of the secondary windings, and different control ends are connected to different secondary windings, so as to obtain the driving signal output by the connected secondary windings. Each of the detecting devices 130 is disposed corresponding to each of the controllable switch tubes 120, and is configured to detect a current flowing through the controllable switch tube 120.
The driving board 110 is connected to each of the detecting devices 130, and is configured to obtain a current detected by the detecting device 130, and stop outputting a driving signal to the control end of the connected controllable switching tube 120 when the obtained current exceeds a preset value.
Through the arrangement, the primary coils connected in series generate electromagnetic induction by the same current, so that the driving signals are synchronously transmitted to the corresponding secondary coils, and the driving synchronism is improved. Moreover, when the current flowing through the controllable switch tube 120 detected by the detection device 130 exceeds a preset value, the controllable switch tube 120 can be controlled to be turned off, so that the overcurrent protection of the controllable switch tube 120 is realized.
The preset value specifically refers to a maximum working current of the controllable switching tube 120. And when the obtained current exceeds the working current of the controllable switching tube 120, each driving board 110 may adjust the duty ratio of the driving signal, and output the adjusted driving signal to the control end of the connected controllable switching tube 120.
In detail, when the obtained current exceeds the operating current of the controllable switching tube 120, each driving board 110 may decrease the duty ratio of the driving signal, and output the adjusted driving signal to the control terminal of the connected controllable switching tube 120, so as to decrease the current flowing through the controllable switching tube 120.
In another embodiment, when the obtained current is smaller than the operating current of the controllable switching tube 120, each driving board 110 may increase the duty cycle of the driving signal, and output the adjusted driving signal to the control terminal of the connected controllable switching tube 120, so as to increase the current flowing through the controllable switching tube 120.
Optionally, the specific type of the driving signal source is not limited, and may be set according to the actual application requirement. For example, in this embodiment, the driving signal source may be a signal source disposed on a motherboard.
Further, the specific number of the driving boards 110 is not limited, and may be set according to the actual application requirements. For example, in an embodiment, the number of the driving boards 110 is multiple, and the driving transformers 111 corresponding to the controllable switching tubes 120 are integrated in the corresponding driving boards 110, that is, the driving transformers 111 correspond to the driving boards 110 one to one, and each driving board 110 is provided with one driving transformer 111. In addition, a plurality of driving transformers 111 may correspond to one driving board 110, for example, two driving transformers 111 are connected to one driving board 110, or three driving transformers 111 are connected to one driving board.
In another embodiment, the number of the driving boards 110 is one, and each of the driving transformers 111 is integrated in the same driving board 110.
Optionally, the specific type of the controllable switch tube 120 is not limited, and may be set according to the actual application requirement. For example, in one embodiment, the controllable switch 120 may be an IGBT; in another embodiment, the controllable switch 120 may be a MOSFET.
Optionally, the specific arrangement of the detection device 130 is not limited, and may be set according to the actual application requirement. For example, in one embodiment, the detection device 130 may be a current sensor. In another embodiment, the detection device 130 may be a current transformer.
In this embodiment, when the controllable switch 120 is an IGBT, the current flowing through the IGBT is a high-frequency signal, and the detecting device 130 may be a hall current sensor.
The specific position of the Hall current sensor is not limited, and the Hall current sensor can be set according to the actual application requirements. For example, in this embodiment, the hall current sensor may be sleeved on the output terminal or the input terminal of the controllable switching tube 120, and is used for detecting the current flowing through the controllable switching tube 120.
As shown in fig. 5, to solve the heat dissipation problem of the driving device 100, the driving device 100 is mounted on a heat sink for heat dissipation. Preferably, a liquid cooling channel is arranged on the radiator to perform auxiliary heat dissipation.
To sum up, the embodiment of the present invention provides a driving device 100 and a solid-state modulator 10, which are connected to a driving signal source through the series connection of the primary coils of a plurality of driving transformers 111, so as to receive the driving signal input by the driving signal source, and generate electromagnetic induction through the same current in the primary coils of the series connection, so as to enable the driving signal to be synchronously transmitted to the corresponding secondary coil, thereby improving the synchronism of driving. Moreover, when the current flowing through the controllable switch tube 120 detected by the detection device 130 exceeds a preset value, the controllable switch tube 120 can be controlled to be turned off, so that the overcurrent protection of the controllable switch tube 120 is realized.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A drive device, comprising:
the driving device comprises a driving board, a plurality of driving transformers and a plurality of driving units, wherein the driving board is provided with a plurality of driving transformers, each driving transformer comprises a primary coil and a secondary coil corresponding to the primary coil, and the primary coils are connected in series and then connected with a driving signal source and used for respectively and synchronously transmitting driving signals to the corresponding secondary coils after receiving the driving signals input by the driving signal source;
the control end of each controllable switch tube is respectively connected with one secondary coil, different control ends of the controllable switch tubes are connected with different secondary coils, and the controllable switch tubes are used for acquiring driving signals output by the connected secondary coils;
the detection devices are respectively arranged corresponding to the controllable switch tubes and used for detecting the current flowing through the controllable switch tubes;
the driving board is respectively connected with each detection device and used for acquiring current detected by the detection device, and when the acquired current exceeds a preset value, the driving board stops outputting driving signals to the control end of the connected controllable switch tube.
2. The drive of claim 1, wherein the sensing device is a current sensor.
3. The driving apparatus as claimed in claim 2, wherein the current sensor is disposed at an output terminal or an input terminal of the controllable switching tube for detecting the current flowing through the controllable switching tube.
4. The driving apparatus as claimed in claim 1, wherein the number of the driving boards is plural, and the driving transformer corresponding to the controllable switching tube is integrated with the corresponding driving board.
5. The driving apparatus as claimed in claim 1, wherein the number of the driving boards is one, and each of the driving transformers is integrated in the same driving board.
6. The driving apparatus as claimed in claim 1, wherein the controllable switching tube is an IGBT or a MOSFET.
7. A solid state modulator, comprising:
a drive arrangement as claimed in any one of claims 1 to 6, comprising a plurality of controllable switching tubes connected in parallel;
the input end and the output end of the energy storage circuit are respectively used for being connected with the anode and the cathode of an external direct current power supply;
the primary coil of the pulse transformer is connected in series with the plurality of controllable switching tubes connected in parallel between the input end and the output end of the energy storage circuit;
the absorption circuit is connected with the primary coil of the pulse transformer in parallel;
when the driving device is switched on, the current output by the direct current power supply is transmitted to the pulse transformer through the energy storage circuit, the driving device and the absorption circuit to be boosted, so that a secondary coil of the pulse transformer outputs high-voltage pulses.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921067425.9U CN209881757U (en) | 2019-07-09 | 2019-07-09 | Driving device and solid-state modulator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921067425.9U CN209881757U (en) | 2019-07-09 | 2019-07-09 | Driving device and solid-state modulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111355474A (en) * | 2020-03-16 | 2020-06-30 | 四川英杰电气股份有限公司 | Control method of solid-state modulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111355474A (en) * | 2020-03-16 | 2020-06-30 | 四川英杰电气股份有限公司 | Control method of solid-state modulator |
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