CN205335828U - Solid -state power controller with prevent latent logical function - Google Patents
Solid -state power controller with prevent latent logical function Download PDFInfo
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- CN205335828U CN205335828U CN201620089154.7U CN201620089154U CN205335828U CN 205335828 U CN205335828 U CN 205335828U CN 201620089154 U CN201620089154 U CN 201620089154U CN 205335828 U CN205335828 U CN 205335828U
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Abstract
The utility model relates to a solid -state power controller with prevent latent logical function, including a field effect transistor, two field effect transistor, sampling resistor and the load of series connection between generating line and ground, a field effect transistor and the 2nd field effect transistor series -opposing connection still include current sampling circuit, AD converting circuit, treater and drive circuit, current sampling circuit is connected with the sampling resistor, gathers the analog current signal of sampling resistor, AD converting circuit is connected with current sampling circuit, converts analog current signal into digital current signal, the treater is connected with AD converting circuit, judges according to digital current signal whether protect function is opened to needs, and when needing, sends drive signal and give drive circuit, drive circuit is connected with treater, a field effect transistor and the 2nd field effect transistor respectively, and drive a field effect transistor and the 2nd field effect transistor turn -offs simultaneously. The utility model discloses can effectively avoid the electric current to flow backward and arouse the power supply system trouble, and reduce the loss when supplying power.
Description
Technical field
This utility model relates to distribution system, is specifically related to a kind of solid-state power controller with anti-logical function of diving。
Background technology
At present; traditional direct-flow current consumer all adopts molten electrical equipment, mechanical switch etc. to carry out circuit protection, add power-off source; the drawback that this kind of circuit design unavoidably exists mechanical properties, concordance is poor, switch life is limited; the use of the severe rugged environments such as Aeronautics and Astronautics can not be met; solid-state power controller is the solid-state components and parts of the defencive function integrating the translation function of relay and chopper, is the switching device controlling load break-make matched with solid state distribution system。It has contactless, without electric arc, noiseless, response is fast, electromagnetic interference is little, life-span length, reliability are high and is easy to the advantages such as computer long-distance control, it is adaptable to high security, in the Aero-Space of high reliability request and weaponry distribution system。
In the Aero-Space distribution system that safety, reliability requirement are high, in order to improve distribution Power System Reliability, it is generally adopted the power supply mode of many buses redundancy backup, common SSPC is due to the parasitic diode of Mosfet, there is sneak circuit, once occur that busbar voltage is uneven, or during band capacitive load, bus power down, it is possible to occur that electric current pours in down a chimney, causes catastrophic effect。
And in order to prevent power supply-distribution system from there is sneak circuit, occur electric current to pour in down a chimney and then cause catastrophic effect, existing distribution system is generally adopted the mode of series diode and suppresses, but diode causes bigger power consumption, increases heat radiation difficulty。
Utility model content
Technical problem to be solved in the utility model is to provide a kind of solid-state power controller with anti-logical function of diving, it is possible to is prevented effectively from electric current and pours in down a chimney and cause electric power system fault, and loss when reducing power supply。
The technical scheme that this utility model solves above-mentioned technical problem is as follows: a kind of solid-state power controller with anti-logical function of diving, including the first field effect transistor being connected between bus and ground, the second field effect transistor, sampling resistor and load, described first field effect transistor and the second field effect transistor differential concatenation, also include current sampling circuit, A/D convertor circuit, processor and drive circuit；
Described current sampling circuit, is connected with described sampling resistor, for gathering the analog current signal of described sampling resistor；
Described A/D convertor circuit, is connected with described current sampling circuit, for analog current signal is converted to digital current signal；
Described processor, is connected with described A/D convertor circuit, for judging whether to need to open defencive function according to digital current signal, and when defencive function opened by needs, sends and drives signal to described drive circuit；
Described drive circuit, is connected with described processor, described first field effect transistor and described second field effect transistor respectively, for simultaneously driving described first field effect transistor and described second field effect transistor shutoff according to described driving signal。
The beneficial effects of the utility model are: by two field effect transistor of differential concatenation on bus, then the electric current on sampling resistor is gathered, after being converted to the current signal of digital quantity, and then judge whether to need to open defencive function by processor, when needed, then send and drive signal to drive two field effect transistor to simultaneously turn off, thus realizing defencive function, and due to the second field effect transistor differential concatenation, when turning off, it is equivalent to a diode, can effectively prevent potential loop and electric current from pouring in down a chimney, and adopt field effect transistor to replace diode, energy consumption can be reduced。
On the basis of technique scheme, this utility model can also do following improvement:
Further, described drive circuit is suspended gate drive circuit。
Further, also include input sampling circuit, it is connected with the input port of described solid-state power controller, gather the analog input voltage of described solid-state power controller, and be converted to after numeral input voltage through A/D convertor circuit, send and judge that whether described input voltage is normal to described processor, and will determine that result preserves, call for user and check。
Above-mentioned further scheme is adopted to provide the benefit that: by gathering the input voltage of solid-state power controller, and after the input voltage that A/D convertor circuit is converted to digital quantity, send and judge that whether input voltage is normal to processor, thus realizing monitoring busbar voltage whether normal operation, and will determine that result preserves, make user when wanting to understand input voltage situation, it is possible to call the data of preservation。
Further, also include output sample circuit, it is connected with the output port of described solid-state power controller, gather the analog output voltage of described solid-state power controller, and be converted to after digital output voltage through A/D convertor circuit, send and judge that whether described output voltage is normal to described processor, and will determine that result preserves, call for user and check。
Above-mentioned further scheme is adopted to provide the benefit that: to gather the output voltage of solid-state power controller, and after the output voltage that A/D convertor circuit is converted to digital quantity, send and judge that whether output voltage is normal to processor, thus realizing monitoring load voltage whether normal operation, and will determine that result preserves, make user when wanting to understand input voltage situation, it is possible to call the data of preservation。
Further, described processor also includes communication module, for setting up communication connection with host computer, and when user calls the judged result of preservation, the judged result of described preservation is sent to host computer order-driven the first field effect transistor showing or receiving host computer and the second field effect transistor is opened。
Above-mentioned further scheme is adopted to provide the benefit that: by communication module and outside host computer communication, thus the judged result transmission of preservation is shown to user to host computer, so that user understands the input voltage of controller and the whether normal of output voltage, and the instruction of host computer is sent to processor and performs instruction。
Further, described processor is FPGA。
Further, described processor is DSP。
Further, described processor is microprocessor。
Further, the source electrode of described first field effect transistor and the source electrode of described second field effect transistor connect。
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of solid-state power controller with anti-logical function of diving of this utility model；
Fig. 2 is triple bus-bar parallel redundancy in this utility model, and equivalent circuit diagram when only bus 1 works。
In accompanying drawing, the list of parts representated by each label is as follows:
1, the first field effect transistor, the 2, second field effect transistor, 3, sampling resistor, 4, current sampling circuit, 5, A/D convertor circuit, 6, processor, 7, drive circuit, 8, input sampling circuit, 9, output sample circuit。
Detailed description of the invention
Below in conjunction with accompanying drawing, principle of the present utility model and feature being described, example is served only for explaining this utility model, is not intended to limit scope of the present utility model。
In this utility model, solid-state power controller is abbreviated as SSPC, Mosfet1 and Mosfet2 and represents the first field effect transistor and the second field effect transistor respectively；
As it is shown in figure 1, a kind of solid-state power controller with anti-logical function of diving, including first field effect transistor the 1, second field effect transistor 2, sampling resistor 3 and the load that are connected between bus and ground, described first field effect transistor 1 and the second field effect transistor 2 differential concatenation；Also include current sampling circuit 4, A/D convertor circuit 5, processor 6 and drive circuit 7；Processor 6 is the digital processing unit such as FPGA or DSP or microprocessor。
Described current sampling circuit 4, is connected with described sampling resistor 3, for gathering the analog current signal of described sampling resistor 3；
Described A/D convertor circuit 5, is connected with described current sampling circuit 4, for analog current signal is converted to digital current signal；
Described processor 6, is connected with described A/D convertor circuit 5, for judging whether to need to open defencive function according to digital current signal, and when defencive function opened by needs, sends and drives signal to described drive circuit 7；
Described drive circuit 7, is connected with described processor 6, described first field effect transistor 1 and described second field effect transistor 2 respectively, for simultaneously driving described first field effect transistor 1 according to described driving signal and described second field effect transistor 2 turns off。
The S pole of the first field effect transistor 1 is extremely connected with the S of the second field effect transistor 2, when solid-state power controller is off state, as shown in Figure 2, SSPC1 is that wherein two field effect transistor on a bus are in the equivalent circuit diagram of opening, SSPC2 and SSPC3 is equivalent circuit diagrams when being off state of two field effect transistor on two other bus respectively, owing to the first field effect transistor and the second field effect transistor are off state, and the first field effect transistor and the second field effect transistor be differential concatenation in circuit, it functions as diode, can effectively prevent potential loop and electric current from pouring in down a chimney。
Defencive function includes: electric current reverse protection function, I2T crosses stream inverse time-lag protection function and short circuit defencive function immediately。
Processor 6 is when judging whether to need to open defencive function, mainly by judging whether the current signal of digital quantity is negative value, if negative value, then it represents that now the electric current in circuit is reverse, it is necessary to firing current reverse protection function；If exceeding setting value not up to short circuit value, then it represents that now circuit is over-current state, it is necessary to open I2T crosses stream inverse time-lag protection function, specifically protects curve to perform I according to international standard2T crosses stream inverse time-lag protection function, when stream inverse time-lag protection function opened by needs, it is possible to performed stream inverse time-lag protection function according to protection curve；If exceeding short circuit value, then it represents that now circuit is in short-circuit condition, it is necessary to open short circuit defencive function immediately。The result of three of the above defencive function is all that two field effect transistor connected in circuit by turn-off reversal realize defencive function。
Wherein, solid-state power controller also includes input sampling circuit 8, it is connected with the input port of described solid-state power controller, for gathering the analog input voltage of described solid-state power controller, and be converted to after numeral input voltage through A/D convertor circuit 5, send and judge that whether described input voltage is normal to described processor 6, and will determine that result preserves, to be called by user and to check。
Solid-state power controller also includes output sample circuit 9, it is connected with the output port of described solid-state power controller, gather the analog output voltage of described solid-state power controller, and after A/D convertor circuit 5 is converted to digital output voltage, send extremely described processor 6 and judge that whether described output voltage is normal, and will determine that result preserves, to be called by user and to check。
Processor 6 also includes communication module, for setting up communication connection with host computer, and when user calls the judged result of preservation, the judged result of described preservation is sent to host computer order-driven the first field effect transistor showing or receiving host computer and the second field effect transistor is opened。
Wherein, Fig. 1 is the structural representation on a bus, and when bus is many, on bus, the circuit components of series connection is all with the structure in Fig. 1, and processor can adopt same, other current collection circuit, A/D convertor circuit and suspended gate drive circuit can be arranged according to the quantity of bus。
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., should be included within protection domain of the present utility model。
Claims (9)
1. a solid-state power controller with anti-logical function of diving, it is characterized in that, including the first field effect transistor (1) being connected between bus and ground, the second field effect transistor (2), sampling resistor (3) and load, described first field effect transistor (1) and the second field effect transistor (2) differential concatenation, also include current sampling circuit (4), A/D convertor circuit (5), processor (6) and drive circuit (7)；
Described current sampling circuit (4), is connected with described sampling resistor (3), is used for gathering the analog current signal of described sampling resistor (3)；
Described A/D convertor circuit (5), is connected with described current sampling circuit (4), for analog current signal is converted to digital current signal；
Described processor (6); it is connected with described A/D convertor circuit (5); for judging whether to need to open defencive function according to digital current signal, and when defencive function opened by needs, send and drive signal to described drive circuit (7)；
Described drive circuit (7), it is connected with described processor (6), described first field effect transistor (1) and described second field effect transistor (2) respectively, for simultaneously driving described first field effect transistor (1) and described second field effect transistor (2) shutoff according to described driving signal。
2. a kind of according to claim 1 have the anti-latent solid-state power controller leading to function, it is characterised in that described drive circuit (7) is suspended gate drive circuit。
3. a kind of according to claim 1 have the anti-latent solid-state power controller leading to function, it is characterized in that, also include input sampling circuit (8), it is connected with the input port of described solid-state power controller, gather the analog input voltage of described solid-state power controller, and be converted to after numeral input voltage through A/D convertor circuit (5), send extremely described processor (6) and judge that whether described input voltage is normal, and will determine that result preserves, call for user and check。
4. a kind of solid-state power controller with anti-logical function of diving according to claim 1 or 3, it is characterized in that, also include output sample circuit (9), it is connected with the output port of described solid-state power controller, gather the analog output voltage of described solid-state power controller, and after A/D convertor circuit (5) is converted to digital output voltage, send extremely described processor (6) and judge that whether described output voltage is normal, and will determine that result preserves, call for user and check。
5. a kind of according to claim 1 have the anti-latent solid-state power controller leading to function, it is characterised in that described processor (6) is FPGA。
6. a kind of according to claim 1 have the anti-latent solid-state power controller leading to function, it is characterised in that described processor (6) is DSP。
7. a kind of according to claim 1 have the anti-latent solid-state power controller leading to function, it is characterised in that described processor (6) is microprocessor。
8. a kind of solid-state power controller with anti-logical function of diving according to claim 5 or 6 or 7, it is characterized in that, described processor (6) also includes communication module, for setting up communication connection with host computer, and when user calls the judged result of preservation, the judged result of described preservation is sent to host computer order-driven the first field effect transistor showing or receiving host computer and the second field effect transistor is opened。
9. a kind of according to claim 1 have the anti-latent solid-state power controller leading to function, it is characterised in that the source electrode of described first field effect transistor and the source electrode of described second field effect transistor connect。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620089154.7U CN205335828U (en) | 2016-01-28 | 2016-01-28 | Solid -state power controller with prevent latent logical function |
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| CN201620089154.7U CN205335828U (en) | 2016-01-28 | 2016-01-28 | Solid -state power controller with prevent latent logical function |
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| CN205335828U true CN205335828U (en) | 2016-06-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514949A (en) * | 2016-01-28 | 2016-04-20 | 中国科学院空间应用工程与技术中心 | Solid state power controller with latent flux prevention function and control method |
| CN109560531A (en) * | 2018-11-09 | 2019-04-02 | 天津航空机电有限公司 | A kind of aviation DC low-power power circuit with reflux, over-voltage protecting function |
| CN111786355A (en) * | 2020-06-23 | 2020-10-16 | 上海电器科学研究所（集团）有限公司 | Protection device and protection method for restraining short circuit of direct current bus support capacitor |
-
2016
- 2016-01-28 CN CN201620089154.7U patent/CN205335828U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514949A (en) * | 2016-01-28 | 2016-04-20 | 中国科学院空间应用工程与技术中心 | Solid state power controller with latent flux prevention function and control method |
| CN109560531A (en) * | 2018-11-09 | 2019-04-02 | 天津航空机电有限公司 | A kind of aviation DC low-power power circuit with reflux, over-voltage protecting function |
| CN111786355A (en) * | 2020-06-23 | 2020-10-16 | 上海电器科学研究所（集团）有限公司 | Protection device and protection method for restraining short circuit of direct current bus support capacitor |
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