CN104467779A - Circuit control system and control method - Google Patents
Circuit control system and control method Download PDFInfo
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- CN104467779A CN104467779A CN201410795248.1A CN201410795248A CN104467779A CN 104467779 A CN104467779 A CN 104467779A CN 201410795248 A CN201410795248 A CN 201410795248A CN 104467779 A CN104467779 A CN 104467779A
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Abstract
The invention discloses a circuit control system and control method. The system comprises a control circuit, a drive circuit, a load circuit, a power input end and a power output end, wherein the control circuit is connected with the drive circuit, the drive circuit is connected with the load circuit, the first connection point of the drive circuit and the load circuit is connected with the power input end, the second connection point of the drive circuit and the load circuit is connected with a ground wire, and the power output end is connected with the load circuit. According to the circuit control system, the same power supply is adopted by the drive circuit and the load circuit and supplies power for the drive circuit and the load circuit at the same time through the power input end, compared with the mode that an independent power supply needs to be provided for the drive circuit in the prior art, the cost of the circuit control system is lowered effectively, and the circuit structure is simplified at the same time.
Description
Technical field
The present invention relates to technical field of integrated circuits, more particularly, relate to a kind of circuit control system and control method.
Background technology
MOSFET field effect transistor (metal-oxide-semiconductor) is a kind of voltage-controlled type power semiconductor, the advantages such as it is high that it has switching speed, and input impedance is high, and driving power is low, and conducting resistance has positive temperature coefficient, Heat stability is good, and safety operation area is wide.Therefore, metal-oxide-semiconductor is widely adopted in the devices such as some control of industrial application.The most substantially be the design of gate driver circuit what utilize metal-oxide-semiconductor.In the circuit of reality, the connection of control drive singal and metal-oxide-semiconductor generally will accomplish the isolation electrically.
The driving isolation of current MOSFET field effect transistor mainly adopts the mode of photoelectrical coupler.Namely external active driving power is needed when utilizing photoelectrical coupler to carry out driving isolation, it needs independently power supply, the time delay of drive circuit can select the photoelectrical coupler of relevant work speed to reach requirement according to the requirement of major loop switching frequency, and the width of drive singal is unrestricted, but utilize the drive circuit of photoelectric coupler isolation to need independently power supply, the complexity not only increasing circuit also add use cost for this reason.
Summary of the invention
In view of this, the object of this invention is to provide a kind of circuit control system and control method, to save system cost, simplify circuit structure.
To achieve these goals, the invention provides following technical scheme:
On the one hand, the invention provides a kind of circuit control system, comprise control circuit, drive circuit, load circuit, power input and power output end, wherein:
Described control circuit is connected with described drive circuit, described drive circuit is connected with described load circuit, described drive circuit is connected with described power input with the first tie point of described load circuit, and described drive circuit is connected with ground wire with the second tie point of described load circuit; Described power output end is connected with described load circuit.
Preferably, described drive circuit comprises bleeder circuit, photoelectric isolating circuit, constant-current circuit and diode, described bleeder circuit is connected with described photoelectric isolating circuit, described photoelectric isolating circuit is connected with described constant-current circuit, described constant-current circuit is connected with described diode, and described diode is connected with ground wire.
Preferably, described load circuit comprises P channel mosfet field effect transistor, rectifier diode and load, wherein: the drain electrode of described P channel mosfet field effect transistor is connected with the positive pole of described rectifier diode, source electrode connects described bleeder circuit, and grid is connected with described photoelectric isolating circuit and described control circuit; The negative pole of described rectifier diode is connected with one end of described load, and the other end of described load is connected with described ground wire.
Preferably, described power input is positioned on the connecting line of the source electrode of described bleeder circuit and described P channel mosfet field effect transistor;
Described power output end is positioned on the connecting line of described rectifier diode and described load.
Preferably, described constant-current circuit comprises:
First PNP type triode, the second PNP type triode, the first resistance and the second resistance; The base stage of described first PNP type triode is connected with the first resistance with between emitter; The base stage of described second PNP type triode is connected with described second resistance with collector electrode, and the collector electrode of described first PNP type triode is connected with the base stage of described second PNP type triode; The emitter of described second PNP type triode is connected with described first resistance.
Preferably, described bleeder circuit comprises:
3rd resistance and voltage stabilizing didoe; Described 3rd resistance and described voltage stabilizing didoe are connected in parallel, and the positive pole of described voltage stabilizing didoe is connected with the grid of described P channel mosfet field effect transistor, and the negative pole of described voltage stabilizing didoe is connected with the source electrode of described P channel mosfet field effect transistor.
Preferably, described photoelectric isolating circuit is specially photoelectrical coupler.
Preferably, described control circuit comprises:
Schmitt inverter and the 4th resistance, described schmitt inverter is connected with described 4th resistant series, and described 4th resistance and described photoelectrical coupler are connected in series.
On the other hand, the invention provides a kind of drive circuit control method, be applied to above-mentioned circuit control system, described method comprises:
Described control circuit controls described drive circuit and forms loop, and power input provides power supply for described drive circuit, makes described drive circuit conducting;
Under described drive circuit drives, described power input provides power supply, described load circuit conducting for described load circuit.
Preferably, described load circuit conducting comprises:
Described control circuit is sent by schmitt inverter and opens signal, and after described photoelectric isolating circuit obtains and opens signal, the collector electrode of described photoelectrical coupler is communicated with transmitter, by described drive circuit conducting;
Under the driving of voltage stabilizing didoe described in described drive circuit, between the grid of described P channel mosfet field effect transistor and source electrode, produce voltage difference, drive the conducting of described P channel mosfet field effect transistor;
Described power input provides power supply, described load circuit conducting by described P channel mosfet field effect transistor, described rectifier diode for described load.
Compared with prior art, advantage of the present invention is as follows:
A kind of circuit control system that the embodiment of the present invention provides, drive circuit and load circuit adopt same power supply by power input simultaneously for drive circuit and load circuit provide power supply, with need for drive circuit provides compared with the mode of independent current source in prior art, the present invention effectively reduces the cost of circuit control system, simplifies circuit structure simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
A kind of structural representation of a kind of circuit control system that Fig. 1 provides for the embodiment of the present invention;
The another kind of structural representation of a kind of circuit control system that Fig. 2 provides for the embodiment of the present invention;
Another structural representation of a kind of circuit control system that Fig. 3 provides for the embodiment of the present invention;
A kind of flow chart of a kind of circuit control method that Fig. 4 provides for the embodiment of the present invention;
The another kind of flow chart of a kind of circuit control method that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to Fig. 1, it illustrates a kind of structural representation of a kind of circuit control system that the embodiment of the present invention provides, this control system comprises: control circuit 10, drive circuit 11, load circuit 12, power input 13 and power output end 14, wherein:
Control circuit 10 is connected with drive circuit 11, and drive circuit 11 is connected with load circuit 12, and drive circuit 11 is connected with power input 13 with the first tie point of load circuit 12, and drive circuit 11 is connected with ground wire with the second tie point of load circuit 12; Power output end 14 is connected with load circuit 12.
A kind of circuit control system that the embodiment of the present invention provides, drive circuit and load circuit adopt same power supply by power input simultaneously for drive circuit and load circuit provide power supply, with need for drive circuit provides compared with the mode of independent current source in prior art, the present invention effectively reduces the cost of circuit control system, simplifies circuit structure simultaneously.
Please refer to Fig. 2, it illustrates the another kind of structural representation of a kind of circuit control system that the embodiment of the present invention provides, wherein: drive circuit 11 comprises bleeder circuit 110, photoelectric isolating circuit 111, constant-current circuit 112 and diode 113, bleeder circuit 110 is connected with photoelectric isolating circuit 111, photoelectric isolating circuit 111 is connected with constant-current circuit 112, constant-current circuit 112 is connected with diode 113, and diode 113 is connected with ground wire.
Load circuit 12 comprises P channel mosfet field effect transistor 120, rectifier diode 121 and load 122, wherein: the drain electrode of P channel mosfet field effect transistor 120 is connected with the positive pole of rectifier diode 121, source electrode connects bleeder circuit 110, and grid is connected with photoelectric isolating circuit 111 and control circuit 10; The negative pole of rectifier diode 121 is connected with one end of load 122, and the other end of load 122 is connected with ground wire; Power input 13 is positioned on the connecting line of the source electrode of bleeder circuit and P channel mosfet field effect transistor 120; Power output end 14 is positioned on the connecting line of rectifier diode and load.
Wherein, the bleeder circuit 110 in drive circuit 11, photoelectric isolating circuit 111, be mutually series connection between constant-current circuit 112 and diode 113, and diode 113 one end except being connected with constant-current circuit 112, its other end is connected with ground wire.
The source electrode of P channel mosfet field effect transistor 120 is connected with power input 13, drains to be connected with rectifier diode 121, and rectifier diode 121 is connected with load 122, and load 122 is connected with ground wire, forms a load circuit.The source electrode of P channel mosfet field effect transistor 120 is connected with bleeder circuit 110, bleeder circuit 110 is connected with photoelectric isolating circuit 111, and photoelectric isolating circuit 111 is connected with constant-current circuit 112, and constant-current circuit 112 is connected with diode 113, diode 113 is connected with ground wire, forms a drive circuit.Drive circuit 11 adopts same input supply terminal with load circuit 12, is controlled, so without the need to increasing extra driving power, just can complete self-driven function by same input power.
Control circuit 10 wherein in circuit control system is connected with photoelectric isolating circuit 111, therefore control circuit 10 can control the conducting of drive circuit 11 by controlling photoelectric isolating circuit 111, to reach the object of driving power load.
In order to realize the protection to drive circuit 11, the diode 113 in drive circuit 11 generally selects rectifier diode.It should be noted that, the type of diode 113 can according to the actual needs sets itself of system, and be not certain, it can select the diode of the different model with identical function.
P channel mosfet field effect transistor 120 in load circuit 12, the connected mode between rectifier diode 121 and load 122 are for being connected in series; rectifier diode wherein in load circuit 12 plays protection in circuit, avoids external voltage and connects the damage causing device in load circuit 12 inverse time.
A kind of circuit control system that the embodiment of the present invention provides, by the conducting of P channel mosfet field effect transistor 120 with photoelectric isolating circuit 111 connection control load circuit 12, off state, namely when drive circuit 11 conducting, corresponding load circuit 12 under the driving of P channel mosfet field effect transistor 111 also by conducting, make input simultaneously for drive circuit 11 and load circuit 12 and improve power supply simultaneously, for circuit normally, with need additionally to increase compared with driving power in prior art, the control system of circuit provided by the invention effectively saves system cost, simplify circuit structure, improve the stability of system.
Please refer to Fig. 3, in fact go out another structural representation that the embodiment of the present invention provides a kind of circuit control system, on the basis of Fig. 1, control system can also comprise: the first PNP type triode 25, second PNP type triode 27, first resistance 28, second resistance 26, the 3rd resistance 23 and voltage stabilizing didoe 24, photoelectrical coupler 22, schmitt inverter 20 and the 4th resistance 21, wherein:
The base stage of the first PNP type triode 25 is connected with the first resistance 28 with between emitter; The base stage of the second PNP type triode 27 is connected with the second resistance 26 with collector electrode, and the collector electrode of the first PNP type triode 25 is connected with the base stage of the second PNP type triode 27; The emitter of the second PNP type triode 27 is connected with the first resistance 28; 3rd resistance 23 is connected in parallel with voltage stabilizing didoe 24, and the positive pole of voltage stabilizing didoe 24 is connected with the grid of P channel mosfet field effect transistor 120, and the negative pole of voltage stabilizing didoe 24 is connected with the source electrode of P channel mosfet field effect transistor 120, composition bleeder circuit 110; The principle of voltage stabilizing didoe 24 is utilized to carry out the voltage at two ends, stable P channel mosfet field effect transistor 120 grid source, no matter how how external input voltage changes, and P channel mosfet field effect transistor grid source both end voltage all can be protected to be no more than the breakdown voltage value of voltage stabilizing didoe 24; Schmitt inverter 20 and the 4th resistance 21 are connected in series, and the 4th resistance 21 is connected in series with photoelectrical coupler 22.
The level in schmitt inverter 20 pairs of control circuits 10 is adopted to change in the circuit control system that the embodiment of the present invention provides, the conducting of output circuit and disconnection in control circuit 10; Adopt photoelectrical coupler 22 as photoelectric isolating device, the signal isolation between control circuit 10 and drive circuit 11;
After output circuit obtains opening signal, the collector and emitter of the photoelectrical coupler 22 in drive circuit is communicated with, make drive circuit 11 form loop, between the grid level of P channel mosfet field effect transistor 120 and source class, produce voltage difference, make the conducting of P channel mosfet field effect transistor 120.
When after the conducting of P channel mosfet field effect transistor 120, load circuit 12 is by power input 13, through the source electrode of P channel mosfet field effect transistor 120, drain electrode and rectifier diode 121, by power delivery to load 122, load 122 and ground wire are connected to form load circuit, after load circuit 12 gets power supply signal, load obtains electric, and output circuit is in conducting state.
It should be noted that, schmitt inverter can be 74LVC1G14 model, and photoelectrical coupler can be TLP127 model; P channel mosfet field effect transistor can be specifically IRF9640S model.And be connected by wire between each device in circuit.
In the control system that the embodiment of the present invention provides, drive circuit 11 and load circuit 12 all by power input 13 for circuit provides power supply.When power input 13 has power supply to input, the photoelectrical coupler 22 that control circuit 10 in circuit controls in drive circuit is in running order, when photoelectrical coupler 22 conducting, drive circuit 11 forms loop, bleeder circuit 110 simultaneously in drive circuit 11 makes the grid of P channel mosfet field effect transistor 120 and source electrode produce voltage difference, when after the grid and source electrode generation voltage difference of P channel mosfet field effect transistor 120, comprise load circuit 12 conducting of P channel mosfet field effect transistor 120, namely power supply transfers to power input 14 by power input 13, power input 14 provides voltage for load 122, to realize the power supply to load 122.When non-transformer inputs, control circuit 10, when not receiving power supply signal, controlled in the off state by the photoelectrical coupler 22 in drive circuit 11, therefore drive circuit 11 is in cut-off state; To such an extent as to the P channel mosfet field effect transistor 120 in load circuit 12 is also in cut-off state, therefore it can not be load 122 normal power supply.The circuit control system provided in the embodiment of the present invention, for drive circuit 11 and load circuit 12 are provided with same power input 13, namely when circuit normally works, power input 13 is simultaneously for drive circuit 11 and load circuit 12 provide power supply, with the normal work of control circuit control system, like this without the need to external power supply, not only simplify the structure of circuit control system, also save the cost of circuit control system.
It should be noted that, the conduction voltage drop of the light-emitting diode of the photoelectrical coupler 22 in circuit is 1.15V.From circuit theory, in control circuit 11, when control signal is high level, changed into low level by schmitt inverter 20, the conducting of photoelectrical coupler 22 prime, light-emitting diode obtains electric, now circuital current IF=(5-1.15) ÷ 1k=3.85mA.
Expression formula according to current transfer ratio (CTR Current Transfer Ratio): CTR=IC/IF calculating current transfer ratio.The most I of current transfer ratio CTR due to photoelectrical coupler 22 reaches 1000%, so can guarantee that photoelectrical coupler 22 has enough collector currents.Otherwise when control signal is low level, photoelectrical coupler 22 disconnects, collector current is 0.
In drive circuit 11, the voltage VCE after photoelectrical coupler 22 conducting between collector electrode and emitter is 1V, and the pressure drop of diode V7 is 1V.
Owing to adopting PNP triode in constant-current circuit 112, according to the feature of PNP triode voltage constant, known Vbe value is 0.6V, base stage first resistance 28 in parallel with between emitter of the first PNP triode 25, produce fixed current, IR2=Vbe ÷ R2=0.6 ÷ 300=2mA, wherein this fixed current can adjust by actual conditions, adjusts simple.
Adopt PNP triode Vbc can bear the feature of larger voltage simultaneously, by in drive circuit 11 except the pressure drop of the BE pole of the 3rd resistance 23, photoelectrical coupler 22 rear end, the first PNP type triode 25 and the second PNP type triode 27, diode 113, other voltages are all carried in base stage and the collector electrode two ends of the second PNP triode 27, also be namely carried on the second resistance 26, ensure that the stable of circuit and adaptability.
When drive circuit 11 conducting, both first PNP triode 25 and the second PNP triode 27 are all operated in magnifying state, its base current is very little can be ignored, therefore the total current of drive circuit 11 be about electric current that the first resistance 28 and the second resistance 26 flows through and, it can realize by following process computation:
When power input voltage is 110V, after photoelectrical coupler 22 conducting, drive circuit 11 forms loop.
Pressure drop VR1 on 3rd resistance 23 is variable, and the pressure drop so on the second resistance 26 is:
VR3＝110V－VR1－VCE－VBE－VBE－VV7
＝110V－VR1－1V－0.6V－0.6V－1V
＝106.8V－VR1。
Wherein, by the electric current of the first resistance 28 be: IR2=2mA.
Wherein, by the electric current of the second resistance 26 be:
IR3＝VR3÷R3＝(106.8V－VR1)÷100k。
Wherein, the total current in drive circuit 11 is:
I＝IR2+IR3＝2mA+(106.8V－VR1)÷100k。
Wherein, by the voltage of the 3rd resistance 23 be:
VR1＝I×R1＝[2mA+(106.8V－VR1)÷100k]×5k。
Variously to calculate successively according to above-mentioned, can obtain by the voltage VR1 of the 3rd resistance 23 is 14.6V, and drive circuit 11 electric current I is about 2.9mA.
After the conducting of P channel mosfet field effect transistor 120, the resistance between the source electrode of P channel mosfet field effect transistor 120 and drain electrode is 0.5 Ω.
Pressure drop wherein between P channel mosfet field effect transistor 120 source electrode and drain electrode determines according to the size of load circuit 12 electric current, and pressure drop when rectifier diode 121 works is 1.2V.Namely, when load current is 1A, pressure drop V=1 × 0.5+1.2=1.7V when this output circuit is opened, pressure drop during known output circuit conducting is very little, can ignore concerning whole load circuit.
It should be noted that, when output circuit is load circuit conducting, power output end is connected with one end of load, the partial circuit of the other end ground connection of load.
After the control signal in control circuit 10 makes output current obtain cut-off signals, the collector and emitter of photoelectrical coupler 22 disconnects, to such an extent as to drive circuit 11 is communicated with disconnection, P channel mosfet field effect transistor 120 loses driving voltage, make its source electrode and drain electrode separated, load circuit 12 disconnects, therefore makes load 122 lose power supply source, and output circuit is in off state.
For load circuit 12, after P channel mosfet field effect transistor 120 is opened, power input 13 is by P channel mosfet field effect transistor 120, and through rectifier diode 121, provide supply voltage to load 122, load 122 gets final product work after obtaining supply power voltage; P channel mosfet field effect transistor 120 turns off, and load circuit 12 disconnects, and load 122 dead electricity, then output circuit quits work.
In a kind of circuit control system that the embodiment of the present invention provides, by the feature adopting PNP triode Vbc can bear larger voltage, by remaining voltage-drop loading of drive circuit at the two ends of PNP triode, to protect the reliable and stable work of drive circuit; Simultaneously according to the principle of voltage stabilizing didoe; stablize the voltage at two ends, P channel mosfet field effect transistor grid source; no matter how how external input voltage changes; P channel mosfet field effect transistor grid source both end voltage all can be protected to be no more than the breakdown voltage value of voltage stabilizing didoe, effectively to have ensured the normal work of each circuit devcie in control system.
Corresponding with the embodiment of said system, the embodiment of the present invention additionally provides a kind of circuit control method, is applied to the control system of circuit, please refer to Fig. 4, it illustrates a kind of flow chart of a kind of circuit control method that the embodiment of the present invention provides, can comprise the following steps:
Step 101: control circuit controls described drive circuit and forms loop, and power input provides power supply for drive circuit, makes drive circuit conducting.
Step 102: under drive circuit drives, power input provides power supply, load circuit conducting for load circuit.
A kind of circuit control method that the embodiment of the present invention provides, drive circuit and load circuit adopt same power supply by power input simultaneously for drive circuit and load circuit provide power supply, with need for drive circuit provides compared with the mode of independent current source in prior art, the present invention effectively reduces the cost of circuit control system, simplifies circuit structure simultaneously.
Please refer to Fig. 5, it illustrates the another kind of flow chart of a kind of circuit control method that the embodiment of the present invention provides, can comprise the following steps:
Step 201: control circuit is sent by schmitt inverter and opens signal, after photoelectric isolating circuit obtains and opens signal, make drive circuit form loop, input provides power supply to make drive circuit conducting for drive circuit.
Step 202: under the driving of voltage stabilizing didoe in the driving circuit, produce voltage difference between the grid of P channel mosfet field effect transistor and source electrode, drives the conducting of P channel mosfet field effect transistor.
Step 203: input provides power supply, load circuit conducting by P channel mosfet field effect transistor, rectifier diode for load.
After output circuit obtains opening signal, the collector and emitter of the photoelectrical coupler V2 in drive circuit is communicated with, make drive circuit form loop, produce voltage difference between the grid level of P channel mosfet field effect transistor and source class, make the conducting of P channel mosfet field effect transistor.
When after the conducting of P channel mosfet field effect transistor, load circuit is by power input, through the source electrode of P channel mosfet field effect transistor, drain electrode and rectifier diode, by power delivery to load, load and ground wire are connected to form load circuit, after load circuit gets power supply signal, load obtains electric, and output circuit is in conducting state.
When control circuit is by schmitt inverter transtation mission circuit cut-off signals, after photoelectric isolating circuit obtains cut-off signals, drive circuit disconnects.P channel mosfet field effect transistor lose driving voltage after, load circuit disconnect.
After control signal in control circuit makes output current obtain cut-off signals, the collector and emitter of photoelectrical coupler disconnects, to such an extent as to drive circuit is communicated with disconnection, P channel mosfet field effect transistor loses driving voltage, make its source electrode and drain electrode separated, load circuit disconnects, therefore makes load lose power supply source, and output circuit is in off state.
A kind of circuit control method provided by the invention, by the conducting of P channel mosfet field effect transistor and photoelectric isolating circuit connection control load circuit, off state, namely when drive circuit conducting, corresponding load circuit under the driving of P channel mosfet field effect transistor also by conducting, make input simultaneously for drive circuit and load circuit and improve power supply simultaneously, for circuit normally, with need additionally to increase compared with driving power in prior art, circuit control method provided by the invention effectively saves system cost, simplify circuit structure, reduce system cost, improve the stability of system.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
To the above-mentioned explanation of the disclosed embodiments, those skilled in the art are realized or uses the present invention.To be apparent for a person skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a circuit control system, is characterized in that, comprising:
Control circuit, drive circuit, load circuit, power input and power output end, wherein:
Described control circuit is connected with described drive circuit, described drive circuit is connected with described load circuit, described drive circuit is connected with described power input with the first tie point of described load circuit, and described drive circuit is connected with ground wire with the second tie point of described load circuit; Described power output end is connected with described load circuit.
2. control system according to claim 1, it is characterized in that, described drive circuit comprises bleeder circuit, photoelectric isolating circuit, constant-current circuit and diode, described bleeder circuit is connected with described photoelectric isolating circuit, described photoelectric isolating circuit is connected with described constant-current circuit, described constant-current circuit is connected with described diode, and described diode is connected with ground wire.
3. control system according to claim 2, it is characterized in that, described load circuit comprises P channel mosfet field effect transistor, rectifier diode and load, wherein: the drain electrode of described P channel mosfet field effect transistor is connected with the positive pole of described rectifier diode, source electrode connects described bleeder circuit, and grid is connected with described photoelectric isolating circuit and described control circuit; The negative pole of described rectifier diode is connected with one end of described load, and the other end of described load is connected with described ground wire.
4. control system according to claim 3, is characterized in that, described power input is positioned on the connecting line of the source electrode of described bleeder circuit and described P channel mosfet field effect transistor;
Described power output end is positioned on the connecting line of described rectifier diode and described load.
5. control system according to claim 2, is characterized in that, described constant-current circuit comprises:
First PNP type triode, the second PNP type triode, the first resistance and the second resistance; The base stage of described first PNP type triode is connected with the first resistance with between emitter; The base stage of described second PNP type triode is connected with described second resistance with collector electrode, and the collector electrode of described first PNP type triode is connected with the base stage of described second PNP type triode; The emitter of described second PNP type triode is connected with described first resistance.
6. control system according to claim 3, is characterized in that, described bleeder circuit comprises:
3rd resistance and voltage stabilizing didoe; Described 3rd resistance and described voltage stabilizing didoe are connected in parallel, and the positive pole of described voltage stabilizing didoe is connected with the grid of described P channel mosfet field effect transistor, and the negative pole of described voltage stabilizing didoe is connected with the source electrode of described P channel mosfet field effect transistor.
7. control system according to claim 2, is characterized in that, described photoelectric isolating circuit is specially photoelectrical coupler.
8. system according to claim 1, is characterized in that, described control circuit comprises:
Schmitt inverter and the 4th resistance, described schmitt inverter is connected with described 4th resistant series, and described 4th resistance and described photoelectrical coupler are connected in series.
9. a drive circuit control method, is applied to the circuit control system described in any one of claim 1-8, it is characterized in that, described method comprises:
Described control circuit controls described drive circuit and forms loop, and power input provides power supply for described drive circuit, makes described drive circuit conducting;
Under described drive circuit drives, described power input provides power supply, described load circuit conducting for described load circuit.
10. control method according to claim 9, is characterized in that, described load circuit conducting comprises:
Described control circuit is sent by schmitt inverter and opens signal, and after described photoelectric isolating circuit obtains and opens signal, the collector electrode of described photoelectrical coupler is communicated with transmitter, by described drive circuit conducting;
Under the driving of voltage stabilizing didoe described in described drive circuit, between the grid of described P channel mosfet field effect transistor and source electrode, produce voltage difference, drive the conducting of described P channel mosfet field effect transistor;
Described power input provides power supply, described load circuit conducting by described P channel mosfet field effect transistor, described rectifier diode for described load.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011523A (en) * | 2019-04-28 | 2019-07-12 | 苏州蓝博控制技术有限公司 | Power drive inverting means and low side driving turn high-end drive circuit |
| CN110069026A (en) * | 2019-03-26 | 2019-07-30 | 柳州埃锡科技有限公司 | Adaptive IO monitor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2080727U (en) * | 1990-07-16 | 1991-07-10 | 伍占禧 | Dc solid-state relay |
| WO2005006303A1 (en) * | 2003-07-09 | 2005-01-20 | Sony Corporation | Constant current circuit and flat display device |
| CN101516148A (en) * | 2008-02-21 | 2009-08-26 | 夏普株式会社 | LED drive circuit |
| CN103312308A (en) * | 2013-06-26 | 2013-09-18 | 湖南工业大学 | Thyristor triggering device and method |
| CN103647540A (en) * | 2013-12-26 | 2014-03-19 | 周芸 | Solid-state wide-voltage isolation type direct-current relay |
-
2014
- 2014-12-18 CN CN201410795248.1A patent/CN104467779A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2080727U (en) * | 1990-07-16 | 1991-07-10 | 伍占禧 | Dc solid-state relay |
| WO2005006303A1 (en) * | 2003-07-09 | 2005-01-20 | Sony Corporation | Constant current circuit and flat display device |
| CN101516148A (en) * | 2008-02-21 | 2009-08-26 | 夏普株式会社 | LED drive circuit |
| CN103312308A (en) * | 2013-06-26 | 2013-09-18 | 湖南工业大学 | Thyristor triggering device and method |
| CN103647540A (en) * | 2013-12-26 | 2014-03-19 | 周芸 | Solid-state wide-voltage isolation type direct-current relay |
Non-Patent Citations (2)
| Title |
|---|
| 朱朝霞: "《机电工程训练教程-电子技术实训（第二版）》", 30 April 2014 * |
| 门宏: "《快速学会认电子元器件》", 31 December 2019 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110069026A (en) * | 2019-03-26 | 2019-07-30 | 柳州埃锡科技有限公司 | Adaptive IO monitor |
| CN110069026B (en) * | 2019-03-26 | 2022-03-25 | 柳州埃锡科技有限公司 | Self-adaptive IO monitor |
| CN110011523A (en) * | 2019-04-28 | 2019-07-12 | 苏州蓝博控制技术有限公司 | Power drive inverting means and low side driving turn high-end drive circuit |
| CN110011523B (en) * | 2019-04-28 | 2023-12-29 | 苏州蓝博控制技术有限公司 | Power driving phase inverter and low-end driving to high-end driving circuit |
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