CN103823502A - Current-limiting hybrid power controller - Google Patents
Current-limiting hybrid power controller Download PDFInfo
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- CN103823502A CN103823502A CN201410057415.2A CN201410057415A CN103823502A CN 103823502 A CN103823502 A CN 103823502A CN 201410057415 A CN201410057415 A CN 201410057415A CN 103823502 A CN103823502 A CN 103823502A
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Abstract
The invention belongs to the technical field of high-voltage power supply and particularly relates to a current-limiting hybrid power controller. The current-limiting hybrid power controller combines a current limiter and a hybrid switch. Under the condition of normal operation, the current limiter amounts to a lead, and the circuit is connected and disconnected by the hybrid switch composed of a solid-state switch and a mechanical switch in parallel. Under the condition of current surge in load short-circuit, capacitor electrifying and the like, the current limiter works at the current limit state, the circuit current is limited, a direct-current contact reliably cuts off load when in load short-circuit, the capacitor can be charged in a current limiting mode when being charged, and overhigh surge current or temperature rise of the solid-state switch is avoided.
Description
Technical field
The invention belongs to high voltage supply technical field, be specifically related to a kind of current-limiting type mixed type power controller.
Background technology
Along with the raising of electrifing degree and the consumer power of vehicle DC distribution system, traditional power supply system can not meet the growing demand of vehicle-mounted power supply-distribution system, the supply voltage of system is in the urgent need to improving, and 900V power supply system receives increasing concern.In vehicle 900V high pressure, direct current, high-power power supply-distribution system, one of key problem is exactly the 900V power distribution equipment for the high pressure on vehicle, direct current, large-power occasions.
Traditional power distribution equipment adopts electromagnetic contactor as the switching device in system more, but the electric arc problem of DC. current electromagnetic contactor is the key issue that affects its life and reliability always.Aspect the electric arc problem of solution D.C. contactor, composite switch is in parallel with electromagnetic contactor by solid-state switch, by make electromagnetic contactor open, to turn-off to the control of switching sequence, thereby create the condition of Switch without electric arc for electromagnetic contactor under low pressure condition.Composite switch takes full advantage of the static properties of dynamic property and the mechanical switch excellence of solid-state switch excellence, can effectively solve the electric arc problem of mechanical switch, but because mechanical switch is long actuation time, when composite switch still faces load short circuits, guard time length, circuital current impact large defect; In addition, for a large amount of electric capacity existing in straight-flow system, there is very large dash current in its powered on moment, although the mode that solid-state switch can slowly change by control load voltage suppresses electric capacity dash current, but in high-power occasion, large, the temperature rise of solid-state switch power consumption in opening process, has limited the application of composite switch greatly.
Summary of the invention
(1) technical matters that will solve
The technical problem to be solved in the present invention is: how a kind of current-limiting type mixed type power controller is provided.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of current-limiting type mixed type power controller, it is characterized in that, described current-limiting type mixed type power controller is a current-limiting type mixed type power controller, and described current-limiting type mixed type power controller comprises: solid-state switch 02, electromagnetic contactor 03, restrictor 01, discharge circuit 04, fly-wheel diode 05;
Described solid-state switch 02 formation in parallel with electromagnetic contactor 03 composite switch, by controlling the switching sequence of solid-state switch 02 and electromagnetic contactor 03, solid-state switch 02 is opened, is later than electromagnetic contactor 03 prior to electromagnetic contactor 03 and turn-offs, make electromagnetic contactor 03 opening, in turn off process solid-state switch 02 always in conducting state, due to the characteristic of solid-state switch 02 low conduction voltage drop, electromagnetic contactor 03 can realize and open, turn-offs without arc under low pressure condition;
Described restrictor 01 is at circuital current during lower than critical current, and the resistance that restrictor 01 shows is very little, and close to 0, now restrictor 01 connects in the line circuit substantially without impact; When circuital current is during higher than critical current, restrictor 01 shows as high impedance, thereby realizes the restriction to circuital current; By utilizing restrictor 01, under normal operation, restrictor 01, on circuit substantially without impact, and powers on there is dash current in the situation that at load short circuits, electric capacity, and restrictor 01 is for carrying out current limliting to circuital current;
Described discharge circuit 04 is made up of discharge switch and discharge resistance, and discharge circuit 04 is used to capacitive load that discharge loop is provided, and provides the branch road of releasing for the shutoff leakage current of solid-state switch 02;
Described fly-wheel diode 05 inverse parallel, at load two ends, is used to inductive load that shutoff continuous current circuit is provided.
(3) beneficial effect
Technical solution of the present invention provides a kind of current-limiting type mixed type power controller (Current Limiting Hybrid Power Controller, CLHPC), not only can solve the electric arc problem of D.C. contactor, effectively electric capacity is charged, while avoiding electric capacity to power on, in large, the solid-state switch opening process of dash current, temperature rise is too high, and in the time of load short circuits, can limit circuital current, thereby guarantee that whole panel switches are without arc, reliable disjunction short-circuit current.
Restrictor and composite switch are combined application by this current-limiting type mixed type power controller (CLHPC), under normal operation, restrictor is equivalent to a wire, carries out connection and the disjunction of circuit by solid-state switch, the mechanical switch composite switch forming in parallel; And power on etc. there is rush of current in the situation that at load short circuits, electric capacity, restrictor works in limited current state, thereby circuital current is limited, while making load short circuits, D.C. contactor excises load reliably, when capacitor charging, can realize current-limiting charge, avoid the temperature rise of excessive dash current or solid-state switch too high.
Accompanying drawing explanation
Fig. 1 is the topology diagram of current-limiting type mixed type power controller in technical solution of the present invention.
Wherein, 01: restrictor, 02: solid-state switch K, 03: electromagnetic contactor T,
Discharge circuit 04:05: fly-wheel diode, K1: discharge switch, R1: discharge resistance;
Fig. 2 is the control strategy schematic diagram of current-limiting type mixed type power controller in technical solution of the present invention.
Embodiment
For making object of the present invention, content and advantage clearer, below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
For solving the problem of prior art, the present invention proposes a kind of current-limiting type mixed type power controller (Current Limiting Hybrid Power Controller, CLHPC), not only can solve the electric arc problem of D.C. contactor, effectively electric capacity is charged, while avoiding electric capacity to power on, in large, the solid-state switch opening process of dash current, temperature rise is too high, and in the time of load short circuits, can limit circuital current, thereby guarantee that whole panel switches are without arc, reliable disjunction short-circuit current.
Particularly, as shown in Figure 1, described current-limiting type mixed type power controller comprises the structure of described current-limiting type mixed type power controller (CLHPC): solid-state switch 02, electromagnetic contactor 03, restrictor 01, discharge circuit 04, fly-wheel diode 05.
Described solid-state switch 02 formation in parallel with electromagnetic contactor 03 composite switch, by controlling the switching sequence of solid-state switch 02 and electromagnetic contactor 03, solid-state switch 02 is opened, is later than electromagnetic contactor 03 prior to electromagnetic contactor 03 and turn-offs, make electromagnetic contactor 03 opening, in turn off process solid-state switch 02 always in conducting state, due to the characteristic of solid-state switch 02 low conduction voltage drop, electromagnetic contactor 03 can realize and open, turn-offs without arc under low pressure condition.
Described restrictor 01 is at circuital current during lower than critical current, and the resistance that restrictor 01 shows is very little, and close to 0, now restrictor 01 connects in the line circuit substantially without impact; When circuital current is during higher than critical current, restrictor 01 shows as high impedance, thereby realizes the restriction to circuital current; By utilizing restrictor 01, under normal operation, restrictor 01, on circuit substantially without impact, and powers on etc. there is dash current in the situation that at load short circuits, electric capacity, and restrictor 01 is for carrying out current limliting to circuital current;
Described discharge circuit 04 is made up of discharge switch and discharge resistance, and discharge circuit 04 is used to capacitive load that discharge loop is provided, and provides the branch road of releasing for the shutoff leakage current of solid-state switch 02; For capacitive load, CLHPC main circuit close have no progeny, if discharge off circuit 04 for capacitive load provides discharge loop, the residual voltage on electric capacity easily brings potential safety hazard; Discharge switch in Fig. 1 closes at CLHPC main circuit the connection of having no progeny, thereby by discharge resistance, the residual voltage in load capacitance is released, and for the shutoff leakage current of solid-state switch 02 provides the branch road of releasing, thereby the situation of avoiding solid-state switch 02 leakage current to be continuously capacitive load charging occurs;
Described fly-wheel diode 05 inverse parallel, at load two ends, is used to inductive load that shutoff continuous current circuit is provided.In the time that load is inductive load, when CLHPC main circuit turn-offs, because inductive current can not suddenly change, there is larger di/dt in solid-state switch 02 two ends; By at fly-wheel diode 05 of load two ends inverse parallel, when closing, CLHPC main circuit has no progeny, and the electric current in load inductance can carry out afterflow by diode, thereby avoids the solid-state switch 02 superpotential generation in two ends.
Below in conjunction with the control strategy of the current-limiting type mixed type power controller shown in Fig. 2, carry out working routine and be described below:
(1) switching mode 1[t0～t1]
While shutoff for assurance CLHPC, load voltage is all the time below safety valve threshold voltage, and when CLHPC turn-offs, discharge circuit 04 keeps conducting; Send provisioning instruction in t0 moment control system, discharge switch K1 disconnects, and in t1 moment when K switch 1 to be discharged is turn-offed completely, pattern 1 finishes, and enters switching mode 2.
(2) switching mode 2[t1～t2]
In the t1 moment, connect solid-state switch 02K, and electromagnetic contactor 03 to open moment t2 (being the duration t2-t1 of switching mode 2) be different under different loads; For capacitive load, open-minded under low pressure condition for guaranteeing electromagnetic contactor 03, need to, first for electric capacity carries out precharge, after finishing, connect again the pre-charge process of electric capacity electromagnetic contactor 03; And for the non-capacitive load of resistive, perceptual this class, after solid-state switch 02 conducting, circuit can reach stable state fast, now can connect electromagnetic contactor 03.
In switching mode 2 processes, under capacitive load, restrictor 01 is worked, and electric capacity can constant-current charge, and under normal resistive load, resistance inductive load, restrictor 01 is not worked; Whether reach the condition more than 95% finishing as switching mode 2 of supply voltage using load voltage, duration that can intelligent decision switching mode 2 to dissimilar load.
(3) switching mode 3[t2～t3]
In the t2 moment, switching mode 2 finishes, and electromagnetic contactor 03 is open-minded, enters switching mode 3; Because the conducting resistance of electromagnetic contactor 03 is very little, circuital current substantially all flows through from electromagnetic contactor 03, and now restrictor 01 is equivalent to a wire, and CLHPC is under normal operation.
(4) switching mode 4[t3～t4]
T3 moment CLHPC receives shutoff instruction, and first electromagnetic contactor 03 disconnects; T3～t4 is the actuation time of electromagnetic contactor 03, t3～t4 internal solid switch 02 keeps conducting state always, in electromagnetic contactor 03 breaking course, its both end voltage is the conduction voltage drop of solid-state switch 02, and therefore electromagnetic contactor 03 can realize and turn-offing without arc under low pressure condition.
(5) switching mode 5[t4～t5]
In the t4 moment, the complete disjunction of electromagnetic contactor 03T, now turn-offs solid-state switch 02K; Consider the impact of line inductance, for preventing that too high di/dt from appearring in solid-state switch 02 in turn off process, adopt slow mode of turn-offing to turn-off solid-state switch 02, control load voltage drops to 0 in regular hour Toff internal linear; Treat that solid-state switch 02K closes the switching mode 5 of having no progeny completely and finishes.
(6) switching mode 6[t5～]
Treat that solid-state switch 02K completely closes and has no progeny, connect discharge switch K1; In the time that load is resistance inductive load, the electric current in load inductance is by fly-wheel diode 05D afterflow; In the time that load is capacitive load, residual voltage on electric capacity bleeds off by discharge switch K1 and power resistor R1, to avoid the voltage on electric capacity higher than human safety voltage, personal safety to be constituted a threat to, also the leakage current of guaranteed output switching tube K1 can not produce accumulation on electric capacity simultaneously.
In the time of load generation over current fault, CLHPC carries out trip protection according to default overcurrent protection curve, and first disjunction electromagnetic contactor 03 while action is treated that electromagnetic contactor 03 divides to have no progeny completely to turn-off solid-state switch 02 again, finally opens discharge switch; In the time that load is short-circuited fault, circuital current fast rise, when electric current during higher than the cut-off current of restrictor 01 restrictor 01 work, circuital current is controlled near cut-off current, judge the load fault that is short-circuited if restrictor 01 works in limited current state certain hour, now cut off electromagnetic contactor 03, electromagnetic contactor 03 can reliable disjunction under low pressure condition, electromagnetic contactor 03 is divided the shutoff solid-state switch 02 of having no progeny completely, finally opens discharge switch.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvement and distortion, these improvement and distortion also should be considered as protection scope of the present invention.
Claims (1)
1. a current-limiting type mixed type power controller, is characterized in that, described current-limiting type mixed type power controller comprises: solid-state switch (02), electromagnetic contactor (03), restrictor (01), discharge circuit (04), fly-wheel diode (05);
Described solid-state switch (02) and electromagnetic contactor (03) formation in parallel composite switch, by controlling the switching sequence of solid-state switch (02) and electromagnetic contactor (03), solid-state switch (02) is opened, is later than electromagnetic contactor (03) prior to electromagnetic contactor (03) and turn-offs, make electromagnetic contactor (03) opening, in turn off process solid-state switch (02) always in conducting state, due to the characteristic of the low conduction voltage drop of solid-state switch (02), electromagnetic contactor (03) can realize and open, turn-offs without arc under low pressure condition;
Described restrictor (01) is at circuital current during lower than critical current, and the resistance that restrictor (01) shows is very little, and close to 0, now restrictor (01) connects in the line circuit substantially without impact; When circuital current is during higher than critical current, restrictor (01) shows as high impedance, thereby realizes the restriction to circuital current; By utilizing restrictor (01), restrictor under normal operation (01), and powers on there is dash current in the situation that at load short circuits, electric capacity substantially without impact on circuit, and restrictor (01) is for carrying out current limliting to circuital current;
Described discharge circuit (04) is made up of discharge switch and discharge resistance, and discharge circuit (04) is used to capacitive load that discharge loop is provided, and provides the branch road of releasing for the shutoff leakage current of solid-state switch (02);
Described fly-wheel diode (05) inverse parallel, at load two ends, is used to inductive load that shutoff continuous current circuit is provided.
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| CN201410057415.2A CN103823502A (en) | 2014-02-20 | 2014-02-20 | Current-limiting hybrid power controller |
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| CN201410057415.2A CN103823502A (en) | 2014-02-20 | 2014-02-20 | Current-limiting hybrid power controller |
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Cited By (4)
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| CN108700634A (en) * | 2016-01-25 | 2018-10-23 | 通用电气航空系统有限公司 | Circuit for detecting arc fault and method |
| CN110399030A (en) * | 2019-07-31 | 2019-11-01 | 浪潮商用机器有限公司 | A kind of anti-electric current percussion mechanism, method and server master board |
| CN110620019A (en) * | 2018-06-20 | 2019-12-27 | 森萨塔科技（常州）有限公司 | Hybrid DC contactor and online diagnosis system thereof |
| CN111566885A (en) * | 2017-11-06 | 2020-08-21 | 德恩塞两合公司 | Circuit arrangement for combined protection of loads against temporary and transient overvoltages |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108700634A (en) * | 2016-01-25 | 2018-10-23 | 通用电气航空系统有限公司 | Circuit for detecting arc fault and method |
| US10830808B2 (en) | 2016-01-25 | 2020-11-10 | Ge Aviation Systems Limited | Circuit and method for detecting arc faults |
| CN111566885A (en) * | 2017-11-06 | 2020-08-21 | 德恩塞两合公司 | Circuit arrangement for combined protection of loads against temporary and transient overvoltages |
| CN111566885B (en) * | 2017-11-06 | 2022-08-30 | 德恩塞欧洲股份公司 | Circuit arrangement for combined protection of loads against temporary and transient overvoltages |
| CN110620019A (en) * | 2018-06-20 | 2019-12-27 | 森萨塔科技（常州）有限公司 | Hybrid DC contactor and online diagnosis system thereof |
| CN110399030A (en) * | 2019-07-31 | 2019-11-01 | 浪潮商用机器有限公司 | A kind of anti-electric current percussion mechanism, method and server master board |
| CN110399030B (en) * | 2019-07-31 | 2021-03-09 | 浪潮商用机器有限公司 | Current impact prevention device and method and server mainboard |
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Application publication date: 20140528 |