CN203840311U - Solid state power controller - Google Patents
Solid state power controller Download PDFInfo
- Publication number
- CN203840311U CN203840311U CN201420285673.1U CN201420285673U CN203840311U CN 203840311 U CN203840311 U CN 203840311U CN 201420285673 U CN201420285673 U CN 201420285673U CN 203840311 U CN203840311 U CN 203840311U
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- state
- control circuit
- sspc
- solid
- power controller
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Abstract
Provided is a solid state power controller. An auxiliary power supply module provides power for a drive circuit after DC/DC conversion carried out by an isolation transformer. An overload control circuit is used for cutting off electric connection between a load and a control input end when a heavy current passes. A TTC/CMOS signal of the control input end enters a state control circuit via an optical coupler. The state control circuit controls, based on the received TTC/CMOS signal, on and off of a load current at an output end interface. The drive circuit is connected with the overload control circuit and the state control circuit. Electric arcs will not be produced when a switch is turned on. The controller has a higher peak inhibition function, can easily handle TTL/CMOS signals related with the solid state controller, and can be applied to high-end switches, low-end switches, negative electrode switches and positive electrode switches.
Description
Technical field
The utility model relates to circuit power distribution control equipment field, specifically a kind of solid-state power controller.
Background technology
At present, in prior art, most of solid-state relays do not have protective feature, are pure switch.In addition, although some solid-state relays can play a protective role in the time of short circuit, can not protect less overload.Meanwhile, in the course of the work, the high temperature that electric arc produces can be pitting of contact together, and in this case, power consumption equipment can not cut off circuit, and circuit can be overheated and damage, and also likely catches fire, and electric arc can also cause high electromagnetic interference.
Solid-state power controller (be called for short SSPC) is alternative on land, atmosphere, and circuit-breaker in the fields such as ocean and aviation, fuse, relay etc., provide State-output, and can display switch state and load current.SSPC major function is that protective circuit is avoided heating.SSPC adopts the logical signal of standard to carry out " ON/OFF " logic input control and State-output, and realizes the electricity isolation of control end and power power-supply end.Adopt thick-film technique, six metallic packaging, have rush of current protection and hot memory function.
Utility model content
The purpose of this utility model is to overcome above-mentioned deficiency, when being provided, a kind of switch opens can not produce electric arc, there is higher peak restrained function, can easily process the TTL/CMOS signal being associated with solid-state controller, can be used for high-end, low side, the New Solid power controller of negative pole and positive switch.
The purpose of this utility model is achieved in that solid-state power controller, comprise isolating transformer, isolation control circuit, optical coupler, drive circuit, overload control circuit, state control circuit, control input end, output, auxiliary power supply module, switch, described auxiliary power supply module is rear by isolating transformer DC/DC conversion is drive circuitry; Described overload control circuit, in the time that large electric current passes through, cuts off being electrically connected between load and control input end; The TTC/CMOS signal of control input end is by the optical coupler control circuit that gets the hang of; State control circuit is according to the load current break-make of the TTC/CMOS signal controlling output interface receiving; Described drive circuit is connected with overload control circuit and state control circuit respectively.
Described solid-state power controller is also provided with embedding Microprocessor Interface.
Described solid-state power controller adopts power field effect transistor as switch.
Described solid-state power controller surface adopts metallic packaging
The utility model has the advantage of: (1) adopts the logical signal of standard to carry out " ON/OFF " logic input control and State-output, and realize the electricity isolation of control end and power power-supply end; (2) adopt thick-film technique, six metallic packaging, have rush of current protection and hot memory function; (3) adopt MOSFET power controller, low " conducting " resistance is provided, low pressure drop, high " closure " impedance and low-power consumption; (4) manufacturing process is good, and volume is little, low in energy consumption high with reliability.(5) can not produce electric arc when switch opens, have higher spike to turn-off and allow, can easily process the TTL/CMOS signal being associated with solid-state controller; (6) there are the compatible input and output of TTL/CMOS, are convenient to and embed microprocessor controller interface.Allow the Self-tipping of automatic load control and emergency, and allow Long-distance Control.
Brief description of the drawings
Fig. 1 is circuit principle structure schematic diagram of the present utility model;
Fig. 2 is that pin function of the present utility model can compatible state diagram;
Fig. 3 is the utility model overcurrent protection time and current relationship schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model will be further described.
The utility model solid-state power controller SSPC(is hereinafter to be referred as SSPC), mainly for the protection of the circuit between power supply and load.Can instead of electr ic motor or heater circuit circuit breaker, and possess the reliability of solid-state electronic.What SSPC was different from circuit breaker is easily to process the TTL/CMOS signal being associated with solid-state controller (as embedded microprocessor).
Auxiliary power supply is transformed to the circuit such as driving, control independently power supply is provided by internal DC/DC.
Control input end provides a compatible input of control commands of TTC/CMOS, and logic high can be opened power switch, and logic low is closed.
Two compatible State-outputs of TTC/CMOS: state 1 and state 2, provide respectively the state information of switching current (load current) and on off state.When without switching current, state 1 output logic high level; In the time having switching current, state 1 output logic low level.In the time that switch is opened, state 2 output logic high level; In the time that switch cuts out, state 2 output logic low levels.As shown in the table.
| NO. | Control inputs | State 1 | State 2 | SSPC state |
| 1 | Low | Low | Low | Extremely |
| 2 | Low | Low | High | Extremely |
| 3 | Low | High | Low | Normally |
| 4 | Low | High | High | Extremely |
| 5 | High | Low | Low | Extremely |
| 6 | High | Low | High | Normally |
| 7 | High | High | Low | Normally |
| 8 | High | High | High | Normally |
Note:
1. whether state 1 shows electric current in load (high is no current, low for there being electric current).
2. state 2 shows whether SSPC internal switch is opened (high for open-minded, low for closing).
3. control input end is controlled SSPC and whether is opened (high for opening SSPC, low for closing SSPC).
Front four combinations (1-4) show: control input end is that the low SSPC that orders closes:
SSPC lost efficacy or shorted to earth.State 1 is low shows in load, there is electric current, and state 2 is low shows that module closes, and SSPC actual should be closed condition.
SSPC lost efficacy.State 1 is low shows that load has electric current; State 2 height show that module opens, and SSPC actual should be closed condition.
Normally close.State 1 is high represents that load does not have electric current; State 2 is low shows that module closes.
SSPC lost efficacy, or state 2 is shorted to auxiliary power supply.State 1 height shows that load does not have electric current; State 2 height show that module opens; SSPC is actual should be closed condition.
Rear four combinations (5-8) show: control input end is that height orders SSPC to open:
SSPC lost efficacy, or state 2 output earth short circuits.State 1 is low shows that load has electric current; The low module pass that shows of state 2.SSPC is actual should be opening state.
Normally open under condition.State 1 is low shows that load has electric current; State 2 height show that module opens.
Peak value overcurrent turn-off function.State 1 is high represents that load does not have electric current; The low module pass that shows of state 2.Illustrate because peak current overcurrent makes module protection and closes.Can be by control input end input logic low level and then change to logic high and reopen.If still transfinite or short circuit in outside, SSPC will again protect and turn-off.
There is no load current.State 1 represents that for high load does not have electric current; State 2 is opened for height shows module.
As shown in Figure 2:
Pin function definition
| Pin | Function |
| 1 | Auxiliary power supply anode |
| 2 | Auxiliary power supply negative terminal |
| 3 | State 1 output |
| 4 | State 2 outputs |
| 5 | Control input end |
| 6 | Power take-off |
| 7 | Power take-off |
| 8 | Empty pin (NC) |
| 9 | Power input |
| 10 | Power input |
Continuous current is less than 110% of rated current, and SSPC just can not turn-off.If continuous current is greater than 145% of rated value, turn-off with regard to overcurrent protection.SSPC can process the overload of short time in the situation that not turn-offing,
Heat circuit can not bear the electric current that transfinites as cold line road.SSPC uses " heat memory " to protect the heat circuit transfiniting.If overload has exceeded the highest instantaneous shutoff level, SSPC will turn-off, irrelevant with the duration of overload.
The rising and falling time of output voltage can be controlled to 500 μ s left and right.The fast rise time can reduce the power consumption of SSPC in the time opening and closing.The peak voltage minimum that the slow rise time makes EMI and causes due to line inductance, and can start larger capacitive load.The rising and falling time of 500 μ s is one and trades off.Although in the time of state variation once in a while, switch can processing power dissipates, open or close fast SSPC can cause overheated.
Electrical performance indexes
1.1 auxiliary power supply
Voltage: 4.5V～5.5V
Electric current: <30mA
1.2 input-output characteristic
1) exchange series
Voltage: AC80V～240V
Frequency: 40～440Hz
Conducting voltage: < 1.3V
Maximum current: 25A
2) direct current series
Voltage: DC18～300V
Conducting resistance: < 40 m Ω
Maximum current: 25A
2. environmental suitability
Operating temperature range :-55 DEG C～+ 125 DEG C
Reserve temperature range :-55 DEG C～+ 125 DEG C
The selection of SSPC module
Circuit has continuous and instantaneous rated value for maximum safe operation electric current.Continuous rating value generally all uses ampere to represent, instantaneous rated value is that the long-pending of I2t represents, is a constant.Instantaneous value is the pulse current value of specific duration section, and the value of I2t can be calculated from data.
As a circuit breaker, the major function of SSPC is protective circuit and prevent that circuit is damaged, the SSPC of a fixing rated value can ensure the continuous current on circuit reach SSPC rated current 145% time necessarily turn-off.In the time selecting SSPC, should make the value of rated operational current not close in scope in Fig. 3 .2 I2t curve chart, protective current is in the scope of closing, and in order to prevent the impact of capacitive load in circuit, the selection of SSPC electric current should have certain surplus.
Circuit prevention
In inductive load, it is raw that SSPC sends out short circuit in the time of open mode, and the instantaneous reduction of inductive current will produce an instantaneous voltage the same while turn-offing with SSPC.Instantaneous voltage is produced by the quick variation of inductive current.If inductance is to input this one end in SSPC power,, in the time that SSPC turn-offs, the voltage on power input pin will raise, and similarly, when inductance is in the time exporting this one side,, in the time that SSPC turn-offs, the voltage of power stage pin raises and affects to negative pole.SSPC inside increased absorbing circuit slow down SSPC turn-off time so that voltage instantaneous value minimize.
In most situation, inductance appears at the input of SSPC, mostly is a few μ H most.Therefore input only has less transient voltage; On the one hand, for inductive load, output will have larger transient voltage in addition, and most typical example is exactly engine.For the SSPC of boundary belt inductive load, must between output and load circuit, place a power diode, prevent that the transient voltage producing in load from affecting output.This diode should be greater than the rated value of SSPC, guarantees that, the in the situation that of short circuit, this diode is clamped down on maximum current instantaneous value.
Reset (RESET)
In the time using auxiliary power supply, internal wiring can reset automatically.
In the time that spike turn-offs generation, will there is locking in SSPC.Restart SSPC, as long as at a logic low of control signal pin input, subsequently, at a logic high of control signal pin input, just can again open SSPC.
Co-ordination when SSPC series connection
Using in the system of multi-level " tree " of SSPC structure, conditioning unit is necessary, in the time that spike overcurrent protection shutoff appears in the SSPC of the bottom, other SSPC should not turn-off.For example, suppose that a system has 25 amperes of SSPC to main linely connected power sup ply, this SSPC is again with multiple reduced-current SSPC.If one of them low current SSPC rated current is 10 amperes, but has the overload of 50 amperes, 50 amperes of rated values that exceed two SSPC, should guarantee 10 amperes SSPC turn-off and the SSPC of 25A does not turn-off, so just can guarantee SSPC co-ordination.
The parallel operation of SSPC
SSPC has advantages of can be in parallel, but not recommendation SSPC parallel connection to obtain higher rated current.The switching tube of SSPC inside is the same with resistance in the time opening, if two SSPC parallel connections, electric current can be shunted between them.If the conduction impedance of switching tube is not identical, electric current is also unequal.Two SSPC in parallel can turn-off in same point, and the SSPC of lower conduction impedance, in the time bearing higher electric current, can first turn-off, once first SSPC turn-offs, second SSPC can bear all electric currents, then also can turn-off.In the time of real work, two SSPC rated current in parallel can be than the height of single SSPC, but because peak current turn-offs curve difference, can cause one of them SSPC first to turn-off, so in the time of pulsed operation state, the rated current of two SSPC in parallel is just difficult to precognition.
The technological merit of SSPC
Power field effect transistor (Power MOSFET) technology that SSPC adopts is as switch.Using power field effect transistor as on-off ratio motor device and bipolar transistor possess more advantages.The most important is in the time of switch opens, not have electric arc.In some cases, the high temperature that electric arc produces can weld together contact, and in this case, motor device can not be opened circuit, and circuit can be overheated and damage, and also likely catches fire.Electric arc can also cause high electromagnetic interference.
SSPC is more superior than solid-state relay.Solid-state relay does not have protective feature mostly, is pure switch.Some solid-state relays can be protected in the time of short circuit, but can not protect less overload, because they do not have overcurrent protection circuit.
SSPC has the compatible input and output of TTL/CMOS, is convenient to and embeds microprocessor controller interface.This allows the Self-tipping of automatic load control and emergency, and allows Long-distance Control.
SSPC has higher spike shutoff to allow than electromagnetic breaker, there is no need to use image-tape to have the such large-scale circuit of electromagnetic breaker.Therefore can save a lot of weight, in aerospace applications, be even more important.
It is high-end that the isolation of control circuit and power circuit can be used to SSPC, low side, negative pole and positive switch.Thereby isolation has also stoped the mistake of power end to extend to control end and has stoped destruction other system element.
Finally it should be noted that: obviously, above-described embodiment is only for the application's example is clearly described, and the not restriction to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all execution modes.And the apparent variation of being amplified out thus or variation are still among the protection range in the application's type.
Claims (4)
1. solid-state power controller, comprises isolating transformer, isolation control circuit, optical coupler, drive circuit, overload control circuit, state control circuit, control input end, output, auxiliary power supply module, switch, it is characterized in that, described auxiliary power supply module is rear by isolating transformer DC/DC conversion is drive circuitry; Described overload control circuit, in the time that large electric current passes through, cuts off being electrically connected between load and control input end; The TTC/CMOS signal of control input end is by the optical coupler control circuit that gets the hang of; State control circuit is according to the load current break-make of the TTC/CMOS signal controlling output interface receiving; Described drive circuit is connected with overload control circuit and state control circuit respectively.
2. solid-state power controller according to claim 1, is characterized in that, described solid-state power controller is also provided with embedding Microprocessor Interface.
3. solid-state power controller according to claim 1 and 2, is characterized in that, described solid-state power controller adopts power field effect transistor as switch.
4. solid-state power controller according to claim 1 and 2, is characterized in that, described solid-state power controller surface adopts metallic packaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420285673.1U CN203840311U (en) | 2014-05-30 | 2014-05-30 | Solid state power controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420285673.1U CN203840311U (en) | 2014-05-30 | 2014-05-30 | Solid state power controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203840311U true CN203840311U (en) | 2014-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420285673.1U Expired - Fee Related CN203840311U (en) | 2014-05-30 | 2014-05-30 | Solid state power controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203840311U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116759A (en) * | 2015-08-27 | 2015-12-02 | 南京航空航天大学 | Mixed signal state machine simulation model of AC solid state power controller |
| CN106370922A (en) * | 2016-08-31 | 2017-02-01 | 中国科学院空间应用工程与技术中心 | Solid state power controller and fault current record method |
| CN110912074A (en) * | 2018-09-14 | 2020-03-24 | Hs电子系统有限责任公司 | Solid state power controller |
| CN113777984A (en) * | 2021-09-02 | 2021-12-10 | 郑州中科集成电路与系统应用研究院 | Direct-current high-voltage multi-path solid-state power controller |
-
2014
- 2014-05-30 CN CN201420285673.1U patent/CN203840311U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116759A (en) * | 2015-08-27 | 2015-12-02 | 南京航空航天大学 | Mixed signal state machine simulation model of AC solid state power controller |
| CN105116759B (en) * | 2015-08-27 | 2017-09-05 | 南京航空航天大学 | A kind of mixed signal state machine emulation mode of alternating current solid-state power controller |
| CN106370922A (en) * | 2016-08-31 | 2017-02-01 | 中国科学院空间应用工程与技术中心 | Solid state power controller and fault current record method |
| CN106370922B (en) * | 2016-08-31 | 2020-01-31 | 中国科学院空间应用工程与技术中心 | solid-state power controller and fault current recording method thereof |
| CN110912074A (en) * | 2018-09-14 | 2020-03-24 | Hs电子系统有限责任公司 | Solid state power controller |
| CN110912074B (en) * | 2018-09-14 | 2023-10-03 | Hs电子系统有限责任公司 | Solid State Power Controller |
| CN113777984A (en) * | 2021-09-02 | 2021-12-10 | 郑州中科集成电路与系统应用研究院 | Direct-current high-voltage multi-path solid-state power controller |
| CN113777984B (en) * | 2021-09-02 | 2023-12-15 | 郑州中科集成电路与系统应用研究院 | DC high-voltage multipath solid-state power controller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20190530 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |