CN201571033U - Solid state power controller - Google Patents
Solid state power controller Download PDFInfo
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- CN201571033U CN201571033U CN2009202854222U CN200920285422U CN201571033U CN 201571033 U CN201571033 U CN 201571033U CN 2009202854222 U CN2009202854222 U CN 2009202854222U CN 200920285422 U CN200920285422 U CN 200920285422U CN 201571033 U CN201571033 U CN 201571033U
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Abstract
The utility model relates to a solid state power controller which is classified as a control circuit taking a microcontroller circuit as the core. The solid state power controller comprises the microcontroller circuit, a bias circuit, an isolating circuit, a tripping feedback circuit, an output feedback circuit, a constant-current circuit, a sampling circuit and an output part, and is characterized in that the output part comprises a power MOSFET (metal-oxide-semiconductor field-effect transistor), a self-locking circuit and a drive circuit consisting of a triode drive circuit and a rapid discharge circuit; the output of the self-locking circuit is connected with the drive circuit; and the output of the drive circuit is connected with the power MOSFET. The drive circuit has high power, so as to ensure that the power MOSFET is conducted and turned off quickly and reduce the switching power of the power MOSFET. The solid state power controller adopts brownout reset and self locking for overload and short circuit protection, and has the advantages of high intelligentized degree and reliable operation.
Description
Affiliated technical field
The utility model belongs to industrial automation control field, relates to a kind of solid power controller.
Background technology
Solid power controller (Solid State Power Controller is called for short SSPC) is a kind of composition element with intelligent functions, and it has comprised the function of solid state relay and overcurrent vreaker.Existing solid state relay has that volume is little, contactless, switching speed is fast, shock resistance and advantage such as vibration is strong, the adverse environment resistant ability is good, but under the situation of overload or load short circuits, very easily causes the solid state relay damage; And its internal mechanical link rod structure of overcurrent vreaker, the contact of hard contact formula, a little less than shock resistance and the vibration ability relative thin, environmental suitability is poor.
The utility model content
The purpose of this utility model provides the high solid power controller of a kind of intelligent degree, this solid power controller reliable operation, the defencive function that also has overload, load short circuits.
Solid power controller provided by the utility model is taked following technical scheme: by microcontroller circuit, biasing circuit, buffer circuit, the tripping operation feedback circuit, the output feedback circuit, constant-current circuit, sample circuit and output are formed, biasing circuit, buffer circuit, the tripping operation feedback circuit, the output feedback circuit, constant-current circuit, sample circuit and output and microcontroller circuit join, it is characterized in that described output is by power field effect pipe, latching circuit reaches the drive circuit that is made of transistor drive circuit and quick discharging circuit and forms, the output of latching circuit connects drive circuit, and the output of drive circuit connects power field effect pipe.
Transistor drive circuit is by triode output type photoelectrical coupler V1 in the described output, NPN triode V4, positive-negative-positive triode V2, voltage-stabiliser tube V6, V8, resistance R 1-R4, resistance R 6, R7, capacitor C 1 constitutes, described quick discharging circuit and by NPN triode V3, positive-negative-positive triode V5, resistance R 5 constitutes, the control voltage signal U1 of microcontroller circuit is by the positive pole input of photoelectrical coupler V1 luminous tube, the negative pole of luminous tube is by voltage-stabiliser tube V8 ground connection, resistance R 1 is connected on the base stage that photoelectrical coupler V1 receives light pipe, between the ground connection emitter-base bandgap grading, its collector electrode is by parallel resistor R3, capacitor C 1 connects the base stage of triode V2, resistance R 2 is connected on the base stage of triode V2, between emitter-base bandgap grading, the collector connecting transistor V4 of triode V2, the base stage of V5, the collector electrode of triode V3 also passes through resistance R 4 ground connection; Triode V4, V5 common emitter, the collector electrode of triode V5 be by resistance R 5 ground connection, and resistance R 6, R7 series connection are between the grid of the emitter-base bandgap grading of triode V4, V5 and power field effect pipe V7, and voltage-stabiliser tube V6 is connected between the contact and ground of resistance R 6, R7.
Described latching circuit is by bidirectional triode thyristor output type photoelectrical coupler V10; triode output type photoelectrical coupler V1; resistance R 1; R8; voltage-stabiliser tube V8 forms; the positive pole of bidirectional triode thyristor output type photoelectrical coupler V10 luminous tube connects the trip protection pulse signal; minus earth; it receives an electrode grounding of light pipe bidirectional triode thyristor; the positive pole of another electrode and triode output type photoelectrical coupler V1 luminous tube connects control signal by resistance R 8; the negative pole of triode output type photoelectrical coupler V1 luminous tube is by voltage-stabiliser tube V8 ground connection; resistance R 1 is connected on the base stage that triode output type photoelectrical coupler V1 receives light pipe; between emitter-base bandgap grading, its collector electrode output drive signal of receiving light pipe is to drive circuit.
Described sample circuit is made up of the sample resistance RS and the amplifying circuit of connecting in the output loop, and the sampling voltage signal of sample resistance RS is sent into microcontroller circuit after amplifying circuit amplifies.Sample resistance RS is close on ceramic DBC plate.
Solid power controller operation principle provided by the utility model is: microcontroller circuit is the control core of this solid power controller, provide power supply by biasing circuit, DC/DC buffer circuit to each element circuit, when applying input voltage signal, signal is added to microcontroller circuit by constant-current circuit, microcontroller circuit output drive signal driving power field effect transistor is connected the solid power controller; During the excision input voltage signal, turn-off the solid power controller.Microcontroller PIC detects the output loading state all the time by the sample resistance RS that is connected in the output loop, and feeds back to the output state end, shows the loaded work piece state.Overload, short-circuit protection detect load current all the time by sample resistance RS; when current overload; overload messages are fed back to microcontroller PIC circuit; microcontroller circuit is delayed time according to overload current; in time delay, eliminate as overload; microcontroller circuit turn-offs output with the trip protection function of start-up system, simultaneously signal feedback is arrived the tripped condition end, and connects tripping operation output (identical with circuit breaker auxiliary contact function).This solid power controller is selected the power field effect pipe of low on-resistance for use at the power output pipe of output; The drive circuit that has adopted transistor drive circuit and quick discharging circuit to constitute, characteristics are that drive circuit power is big, guaranteed the quick conducting of power MOSFET tube and shutoff are fast reduced power MOSFET tube switch power consumption, realized the high-power MOSFET reliably working.Be provided with the latching circuit that joins with drive circuit at output; this solid power controller overload, short-circuit protection have adopted the self-locking mode of power-off reset; after being the overload or short-circuit protection action; after must turn-offing input voltage signal; again apply input voltage signal again, the solid power controller could realize reclosing output once more.Make the work of solid power controller more reliable.Sample circuit is made up of the sample resistance RS and the amplifying circuit of connecting in the output loop, sample resistance RS takes to be close to the mounting means on ceramic DBC plate, the heat of its generation can be left by ceramic DBC plate, copper soleplate and radiator path rapidly, sampled signal voltage consistency is fine, has effectively avoided the influence of sample resistance heat increase to resistance precision.
Solid power controller provided by the utility model is owing to adopt microcontroller PIC to finish control for the control core circuit, intelligent degree height, and the power output pipe is selected the power field effect pipe of low on-resistance for use; Load current adopts the resistance sampling mode; Solid power controller overload, short-circuit protection have adopted the self-locking mode of power-off reset, and solid power controller reliable operation simultaneously, also has advantage low in energy consumption, that control precision is high.
Description of drawings
Fig. 1 is the electric theory diagram that the utility model provides the solid power controller;
Fig. 2 is the electrical schematic diagram of solid power controller output drive circuit embodiment;
Fig. 3 is the electrical schematic diagram of solid power controller output latching circuit embodiment;
Fig. 4 is the theory diagram of solid power controller sample circuit;
Fig. 5 is the electrical schematic diagram of amplifying circuit embodiment in the solid power controller sample circuit;
Fig. 6 is a solid power controller sample resistance mounting process structure chart;
Fig. 7 is the control principle block diagram of solid power controller microcontroller.
Embodiment
Below in conjunction with description of drawings enforcement of the present utility model with further describe the various principles of each part of solid power controller.
Fig. 1 is the electric theory diagram of solid power controller.As shown in Figure 1: it is to be the control core circuit with the microcontroller circuit that the utility model provides the solid power controller, be made up of microcontroller circuit, biasing circuit, buffer circuit, tripping operation feedback circuit, output feedback circuit, constant-current circuit, sample circuit and output, biasing circuit, buffer circuit, tripping operation feedback circuit, output feedback circuit, constant-current circuit, sample circuit and output and microcontroller circuit join.
Microcontroller circuit is the core of solid power controller design, and it mainly acts on is processing by to control input signals, reseting input signal, sampled signal, realizes the shutoff of output circuit; Simultaneously overload, short circuit output state are carried out online detection, and feed back to tripped condition end and load condition end at any time, show the loaded work piece state; And control the shutoff of one tunnel tripping operation output (identical) with circuit breaker auxiliary contact function.The solid power controller is realized resetting reclosing output by input voltage being reduced to low level under guard mode.
The control principle block diagram that adopts microcontroller PIC to form is seen Fig. 7.When solid power controller overload or short circuit, the signal that overload or short circuit current are obtained by sample circuit, pass through amplifying circuit, export a voltage signal that is directly proportional with load current, A/D converter among the microcontroller PIC converts the analog voltage signal that is sampled to digital signal, is implemented under different overloads or the short circuit current judgement of different trip times by the software program of working out in advance, the drive circuit of power controlling efferent duct reaches and turn-offs the output purpose; An exportable tripped condition signal of while or load switch status signal.By software programming to microcontroller PIC, we can make amendment to tripping current value and trip time, short-circuit current value and duration of short circuit very easily, realize the intellectuality of solid power controller veritably fully, its advantage is the intelligent level height of solid power controller, realized the online modification program, tripping current value that needs at different user and time carry out modification of program and just can meet the demands, and are convenient to produce and debug.
Fig. 2 is the electrical schematic diagram of solid power controller output drive circuit embodiment.Transistor drive circuit is by triode output type photoelectrical coupler V1 in the solid power controller output, NPN triode V4, positive-negative-positive triode V2, voltage-stabiliser tube V6, V8, resistance R 1-R4, resistance R 6, R7, capacitor C 1 constitutes, described quick discharging circuit and by NPN triode V3, positive-negative-positive triode V5, resistance R 5 constitutes, the control voltage signal U1 of microcontroller circuit is by the positive pole input of photoelectrical coupler V1 luminous tube, the negative pole of luminous tube is by voltage-stabiliser tube V8 ground connection, resistance R 1 is connected on the base stage that photoelectrical coupler V1 receives light pipe, between the ground connection emitter-base bandgap grading, its collector electrode is by parallel resistor R3, capacitor C 1 connects the base stage of triode V2, resistance R 2 is connected on the base stage of triode V2, between emitter-base bandgap grading, the collector connecting transistor V4 of triode V2, the base stage of V5, the collector electrode of triode V3 also passes through resistance R 4 ground connection; Triode V4, V5 common emitter, the collector electrode of triode V5 be by resistance R 5 ground connection, and resistance R 6, R7 series connection are between the grid of the emitter-base bandgap grading of triode V4, V5 and power field effect pipe V7, and voltage-stabiliser tube V6 is connected between the contact and ground of resistance R 6, R7.The output stage of drive circuit adopts transistor drive circuit that power MOSFET tube V7 is directly driven.When input signal U1 is high level, photoelectrical coupler triode V1 conducting, 5 pin are low level, triode V2 conducting, triode V3 ends, and triode V5 ends, triode V4 conducting, driving voltage is added on the power MOSFET grid by resistance R 6, R7 output, makes power MOSFET tube V7 conducting; When input signal U1 is low level, photoelectrical coupler triode V1 ends, 5 pin are high level, triode V2 ends, triode V3 conducting, triode V5 conducting, triode V4 ends, electric charge on the power MOSFET tube grid discharges by the quick discharging circuit that is made of NPN triode V3, positive-negative-positive triode V5, resistance R 5, makes power MOSFET tube V7 fast by turn-offing.The advantage of this drive circuit is: drive circuit power is big, has guaranteed the quick conducting of power MOSFET tube and shutoff are fast reduced power MOSFET tube switch power consumption, has realized the high-power MOSFET reliably working.
Fig. 3 is the electrical schematic diagram of solid power controller output latching circuit embodiment.Referring to Fig. 3; latching circuit is by bidirectional triode thyristor output type photoelectrical coupler V10; triode output type photoelectrical coupler V1; resistance R 1; R8; voltage-stabiliser tube V8 forms; the positive pole of bidirectional triode thyristor output type photoelectrical coupler V10 luminous tube meets trip protection pulse signal U2; minus earth; it receives an electrode grounding of light pipe bidirectional triode thyristor; the positive pole of another electrode and triode output type photoelectrical coupler V1 luminous tube meets control signal U1 by resistance R 8; the negative pole of triode output type photoelectrical coupler V1 luminous tube is by voltage-stabiliser tube V8 ground connection; resistance R 1 is connected on the base stage that triode output type photoelectrical coupler V1 receives light pipe; between emitter-base bandgap grading, its collector electrode output drive signal of receiving light pipe is to drive circuit.Latching circuit and drive circuit are shared triode output type photoelectrical coupler V1.In self-locking mode protective circuit, employing be controllable silicon output type photoelectrical coupler, utilize the controllable silicon conducting after, keep the characteristic that electric current is kept its conducting, the bypass input control signal turn-offs its control circuit, realizes the tripping operation self-lock protection; Have only control signal in low level, when keeping electric current and cancelling, the tripping operation self-lock protection could be cancelled.Be characterized in: the trip protection quick action can reach the microsecond level and turn-off; Signal is realized the light isolation, and antijamming capability is strong, the reliability height.Bidirectional triode thyristor output type optical coupler model MOC3083 in this circuit, triode output type optical coupler model 4N38.
Fig. 4 is the theory diagram of solid power controller sample circuit.Described sample circuit is made up of the sample resistance RS and the amplifying circuit of connecting in the output loop, and RL is load among the figure, and the sampling voltage signal of sample resistance RS is sent into microcontroller circuit after amplifying circuit amplifies.Fig. 5 is the electrical schematic diagram of amplifying circuit embodiment in the solid power controller sample circuit.In the sample circuit amplifying circuit by operational amplifier V11, and the amplifying circuit that constitutes of resistance R 10, R11 form, the sampled signal URS of sample resistance is added on the input port 3 of operational amplifier V11, the input port 2 of operational amplifier V11 is by resistance R 10 ground connection, resistance R 11 is connected on 6 of the input port 2 of operational amplifier V11 and output ports, and the sampled signal after the amplification is delivered to the input port 3 of microcontroller V12 from the output port 6 of operational amplifier V11.When solid power controller operate as normal, load sampled signal URS millivolt magnitude of voltage is added in operational amplifier V11 input port 3, amplifies by operational amplifier V11, and multiplication factor is by the decision of R11/R10 value, and multiplication factor R11/R10=10 doubly; Load sampled signal after the amplification is by operational amplifier V11 output port 6, be added to microcontroller V12 port 3, convert the analog voltage signal that samples to digital signal by the A/D converter among the microcontroller V12, realize the output of loaded work piece state by the software program of establishment in advance.Operational amplifier V1 model OP193 in the circuit, microcontroller V2 model PIC12F675.
When solid power controller overload or short circuit, overload or short circuit current are obtained a millivolt voltage value signal URS by sample circuit, amplify by operational amplifier V11, and multiplication factor is by the decision of R11/R10 value, and multiplication factor R11/R10=10 doubly; Overload after the amplification or short circuit sampled signal are by operational amplifier V11 output port 6; export the voltage signal that an overload or short circuit current are directly proportional; be added to microcontroller V12 port 3; A/D converter among the microcontroller V12 converts the analog voltage signal that samples to digital signal; software program by establishment in advance is implemented under different overloads or the short circuit current; the judgement of different trip times; export a trip protection pulse U2; the output of control solid power controller; reach and turn-off the output purpose, export a tripped condition signal U2out and load switch status signal U3out simultaneously.
Fig. 6 solid power controller sample resistance mounting process structure chart.Series resistance is carried out the current sampling method in the utility model employing output loop, the signal that overload or short circuit current are obtained by sample circuit is the millivolt value, need to amplify, export a voltage signal that is directly proportional with load current, deliver to microcontroller PIC by signal amplification circuit.Be characterized in inspection stream precision height, in certain temperature range, change in resistance is very little, good product consistency; At electric current hour, the sampling of load current, better with the resistance sampling method; But when electric current was big, power consumption was big, and the series connection sample resistance has produced certain output voltage and fallen, and the voltage drop of solid power controller is increased, and the power consumption of solid power controller increases, and heat radiation is required high.In the utility model, sample resistance RS closely is attached on the ceramic DBC plate, (potsherd 2 and the copper 3 that covers on it constitute ceramic DBC plate) can leave the heat of its generation rapidly by ceramic DBC plate, copper soleplate 1 and radiator path, pass through verification experimental verification, sampled signal voltage consistency is fine, the influence of effectively having avoided the sample resistance heat to increase.
Claims (5)
1. solid power controller, by microcontroller circuit, biasing circuit, buffer circuit, the tripping operation feedback circuit, the output feedback circuit, constant-current circuit, sample circuit and output are formed, biasing circuit, buffer circuit, the tripping operation feedback circuit, the output feedback circuit, constant-current circuit, sample circuit and output and microcontroller circuit join, it is characterized in that described output is by power field effect pipe, latching circuit reaches the drive circuit that is made of transistor drive circuit and quick discharging circuit and forms, the output of latching circuit connects drive circuit, and the output of drive circuit connects power field effect pipe.
2. solid power controller according to claim 1, it is characterized in that transistor drive circuit is by triode output type photoelectrical coupler (V1) in the described output, NPN triode (V4), positive-negative-positive triode (V2), voltage-stabiliser tube (V6, V8), resistance (R1-R4), resistance (R6, R7), electric capacity (C1) constitutes, described quick discharging circuit is by NPN triode (V3), positive-negative-positive triode (V5), resistance (R5) constitutes, the control voltage signal (U1) of microcontroller circuit is by the positive pole input of photoelectrical coupler (V1) luminous tube, the negative pole of luminous tube is by voltage-stabiliser tube (V8) ground connection, resistance (R1) is connected on the base stage that photoelectrical coupler (V1) is received light pipe, between the ground connection emitter-base bandgap grading, its collector electrode is by parallel resistor (R3), electric capacity (C1) connects the base stage of triode (V2), resistance (R2) is connected on the base stage of triode (V2), between emitter-base bandgap grading, the collector connecting transistor (V4 of triode (V2), V5) base stage, the collector electrode of triode (V3) also passes through resistance (R4) ground connection; Triode (V4, V5) common emitter, the collector electrode of triode (V5) is by resistance (R5) ground connection, resistance (R6, R7) series connection is between the grid of the emitter-base bandgap grading of triode (V4, V5) and power field effect pipe (V7), and voltage-stabiliser tube (V6) is connected between the contact and ground of resistance (R6, R7).
3. solid power controller according to claim 1 and 2; it is characterized in that described latching circuit is by bidirectional triode thyristor output type photoelectrical coupler (V10); triode output type photoelectrical coupler (V1); resistance (R1; R8); voltage-stabiliser tube (V8) is formed; the positive pole of bidirectional triode thyristor output type photoelectrical coupler (V10) luminous tube connects trip protection pulse signal (U2); minus earth; it receives an electrode grounding of light pipe bidirectional triode thyristor; the positive pole of another electrode and triode output type photoelectrical coupler (V1) luminous tube connects control signal (U1) by resistance (R8); the negative pole of triode output type photoelectrical coupler (V1) luminous tube is by voltage-stabiliser tube (V8) ground connection; resistance (R1) is connected on the base stage that triode output type photoelectrical coupler (V1) is received light pipe; between emitter-base bandgap grading, its collector electrode output drive signal of receiving light pipe is to drive circuit.
4. solid power controller according to claim 1 and 2, it is characterized in that described sample circuit is made up of sample resistance of connecting in the output loop (RS) and amplifying circuit, the sampling voltage signal of sample resistance (RS) is sent into microcontroller circuit after amplifying circuit amplifies.
5. solid power controller according to claim 4 is characterized in that described sample resistance (RS) is close on the ceramic DBC plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202854222U CN201571033U (en) | 2009-12-25 | 2009-12-25 | Solid state power controller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009202854222U CN201571033U (en) | 2009-12-25 | 2009-12-25 | Solid state power controller |
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| CN201571033U true CN201571033U (en) | 2010-09-01 |
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| CN2009202854222U Expired - Fee Related CN201571033U (en) | 2009-12-25 | 2009-12-25 | Solid state power controller |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104582208A (en) * | 2015-02-15 | 2015-04-29 | 北京经纬恒润科技有限公司 | Illuminating circuit and illuminating circuit control method |
| CN105306030A (en) * | 2015-12-02 | 2016-02-03 | 上海航空电器有限公司 | Main power circuit for alternating current solid state power controller |
| CN106130522A (en) * | 2016-07-14 | 2016-11-16 | 南京航空航天大学 | A kind of SiC MOSFET gradual change level driving circuit being applicable to DC solid-state power controller and method |
| CN106325265A (en) * | 2016-10-27 | 2017-01-11 | 山东省科学院自动化研究所 | Fault diagnosis circuit and method of vehicle control module |
-
2009
- 2009-12-25 CN CN2009202854222U patent/CN201571033U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104582208A (en) * | 2015-02-15 | 2015-04-29 | 北京经纬恒润科技有限公司 | Illuminating circuit and illuminating circuit control method |
| CN105306030A (en) * | 2015-12-02 | 2016-02-03 | 上海航空电器有限公司 | Main power circuit for alternating current solid state power controller |
| CN106130522A (en) * | 2016-07-14 | 2016-11-16 | 南京航空航天大学 | A kind of SiC MOSFET gradual change level driving circuit being applicable to DC solid-state power controller and method |
| CN106130522B (en) * | 2016-07-14 | 2018-12-07 | 南京航空航天大学 | A kind of SiC MOSFET gradual change level driving circuit and method suitable for DC solid-state power controller |
| CN106325265A (en) * | 2016-10-27 | 2017-01-11 | 山东省科学院自动化研究所 | Fault diagnosis circuit and method of vehicle control module |
| CN106325265B (en) * | 2016-10-27 | 2019-01-22 | 山东省科学院自动化研究所 | A kind of method for diagnosing faults of automobile body control module |
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Owner name: INFORMATION INDUSTRY MINISTRY NO.14 ELECTRONIC RES |
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Effective date of registration: 20110831 Address after: 233010 No. 772 long march road, Anhui, Bengbu Co-patentee after: Huacheng High-tech Co.,Ltd. Of Electronic No.40 Research Institute, Ministry of Industry and Information Technology Patentee after: 44th Research Institute of China Electronics Technology Group Corporation Address before: 233010 Bengbu Changzheng Road, Anhui, No. 773 Patentee before: 44th Research Institute of China Electronics Technology Group Corporation |
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Granted publication date: 20100901 Termination date: 20161225 |
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| CF01 | Termination of patent right due to non-payment of annual fee |