CN103746559A - Large-power DC controller possessing active and passive safety protection functions - Google Patents
Large-power DC controller possessing active and passive safety protection functions Download PDFInfo
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- CN103746559A CN103746559A CN201210480579.7A CN201210480579A CN103746559A CN 103746559 A CN103746559 A CN 103746559A CN 201210480579 A CN201210480579 A CN 201210480579A CN 103746559 A CN103746559 A CN 103746559A
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Abstract
The present invention discloses a large-power DC controller possessing the active and passive safety protection functions. The large-power DC controller possessing the active and passive safety protection functions is composed of an isolation transformer (T1), resistors (R), capacitors (C), triodes (S), rectifier diodes (V), voltage-regulator tubes (D) and field effect transistors (Q). The beneficial effects of the present invention are that an active safety protection function enables the large-power DC controller not to be damaged easily, a passive safety protection function enables the large-power DC controller not to be afraid to be damaged, and the highest safety grade is realized, so that the large-power DC controller possessing the active and passive safety protection functions has the prominent advantages of strong environment adaptability, high work reliability, long service life, etc.
Description
Technical field
The present invention relates to a kind of power control unit of the employing all electronic circuit Technology design for Diesel engine auxiliary starter field (vehicle energy saving field of Environment Protection).
Background technology
The auto industry of China is all enhanced on technical merit and assembly quality in recent years, Ge great car load producer complies with novel vehicle that the development in market constantly releases high-tech, high-quality to meet car load technological progress needs, along with the raising of automotive performance, Ge great auto vendor has all proposed higher requirement to the quality of parts, some original parts particularly electric device have not been well positioned to meet the requirement of new automobile, and therefore the skill upgrading of electric device is imperative.
Automotive Diesel engine auxiliary starting system in automobile start system in critical role.Automotive Diesel engine adopts the preheating device of preheating relay control to heat engine charge air when cold-starting, thereby engine is started smoothly.According to national motor vehicle emission standard second stage restriction, be called for short state's II, Diesel engine cold-starting adopts flame preheating device, the work of preheating relay control Flame preheating plug, by flame mode of heating, make Engine Inlet Temperature improve 60 ℃～70 ℃, make engine starting smoothly at low temperatures.
According to national motor vehicle emission standard phase III restriction, be called for short state's III, further reduced the content of sulphur in engine exhaust emission, Diesel engine cold-starting adopts flame preheating device can not be suitable for, state's III standard diesel engine adopts preheating relay control air heater, make air heat actuator temperature within 20s～30s time, rise to 950 ℃, directly engine charge air is heated, thereby engine is started smoothly.What generally adopt at present is electromagnetic relay, and it has simple in structure, easy to maintenance, low cost and other advantages, but can produce contact arc spark, and contact easily damages, and there will be welding phenomenon especially at large current conditions lower contact, and environmental suitability is poor.
The change of inlet air heating mode makes the load current of preheating relay produce very large variation, load current has been increased to 150A from 70A, like this preheating relay is had higher requirement in high-power lower reliable work, and electromagnetic relay is owing to easily damaging contact, at large current conditions lower contact, there will be welding phenomenon especially, under high power load, more can not work reliably.Once there is fault in preheating relay, by uncontrollable air heater, also just cannot realize the cold-starting of Diesel engine, also can cause damage to other system simultaneously, fail safe is poor.
Under the condition of high power load, early stage high power DC controller has solved contactless weldless phenomenon, but the impaired power field effect pipe short-circuit failure that causes of the electronic device of high power DC controller, there is making the break-make of the uncontrollable power field effect pipe of input control voltage in this situation, power field effect pipe remains that short-circuit condition is connected output all the time, and whole auxiliary starting device is by continuous firing; So just require to add the treatment circuit of interference signal to external world in high power DC controller, reduce the impact of external interference signal on high power DC controller; Therefore, at input, add filter circuit and pressure limited protection circuit, output adds overvoltage crowbar and quick overheating protection circuit.Overtemperature protection part can make power field effect pipe timely open circuit when short-circuit failure state occurs protect whole auxiliary starting system and other related system fast, thereby while making high power DC controller occur short circuit failure mode, can not affect whole auxiliary starting system and other related system.
Summary of the invention
The present invention is to provide and a kind ofly have that environmental suitability is strong, functional reliability is high, the high power DC controller with active and passive safety protection function of long service life.
Main feature of the present invention is: isolating transformer, resistance, electric capacity, triode, rectifier diode, voltage-stabiliser tube, field effect transistor, control relay, consist of, the output of isolating transformer arranges four rectifier diode V3, V4, V5, V6, four rectifier diode V3, V4, V5, V6 connect the outward rear voltage-stabiliser tube D4 in parallel of a resistance R 13, a resistance R 14, a capacitor C 6, three field effect transistor, parallel with one another between its three field effect transistor Q1, Q2, Q3, three field effect transistor loong shunt overvoltage protection parts, the quick overtemperature protection part of connecting, isolating transformer importation arranges triode S2, triode S3, resistance R 11, resistance R 12, capacitor C 4, capacitor C 5, the B of its triode S3, E end series connection one capacitor C 4, one resistance R 11, its capacitor C 4 is in parallel with resistance R 11, the C of its triode S2, E holds voltage-limiting protection part in parallel, one resistance R 5, one resistance R 3, one capacitor C 2, one capacitor C 1, one rectifier diode V2, one resistance R 1, the line Bao Duan of its rectifier diode V2 two ends control relay K1 in parallel, the C of its triode S2, E end series connection one resistance R 2, one resistance R 4, one voltage-stabiliser tube D1, one rectifier diode V1, the B of its triode S2, E end series connection one resistance R 12, one capacitor C 5, its resistance R 12 is in parallel with capacitor C 5.
Main feature of the present invention is: voltage-limiting protection part consists of voltage comparator, resistance, triode, voltage-stabiliser tube, electric capacity, two-way twin zener dioder; voltage comparator is in parallel with two-way twin zener dioder Y1; the input negative terminal of its voltage comparator arranges a resistance R 6, a resistance R 7; the input anode of voltage comparator arranges a voltage-stabiliser tube D2, a resistance R 8, a capacitor C 3, and the output of voltage comparator sets gradually resistance R 9, voltage-stabiliser tube D3, resistance R 10, triode S1.
Main feature of the present invention is: output overvoltage protection part consists of capacitor C 7, resistance R 15 and two-way twin zener dioder Y2, its capacitor C 7 connect with resistance R 15 after two-way twin zener dioder Y2 in parallel.
Main feature of the present invention is: overtemperature protection part consists of temperature thermal protector, resistance R 16, control relay K1 fast, and its temperature thermal protector is in parallel with resistance R 16, and the output of its control relay K1 is connected with resistance R 16.
Beneficial effect of the present invention is: input control electric current of the present invention is little, the filter circuit disturbing with electromagnetic pulse-resisting, the pressure limited protection circuit that limits input voltage working range is avoided switching loss and high pressure interference damage high power DC controller, output is that power field effect pipe does not have contact, do not produce arc spark, and at output, be provided with overvoltage crowbar and prevent that spike interference from damaging power output field effect transistor, overheating protection circuit provides in time protection when power field effect pipe short-circuit failure fast, open circuit, realize the non-short circuit failure mode of high power DC controller, these protective circuits have just formed active safety protection part and the passive security protection part of high power DC controller, active safety protection makes high power DC controller not fragile, passive security protection makes high power DC controller not fear damage, realize the highest level of security, thereby make it have the outstanding advantages such as environmental suitability is strong, functional reliability is high, long service life.
Accompanying drawing explanation
Fig. 1 is pressure limited protection circuit schematic diagram of the present invention
Fig. 2 is output overvoltage crowbar schematic diagram of the present invention
Fig. 3 is the quick overheating protection circuit schematic diagram of the present invention
Fig. 4 is apparatus of the present invention way circuit schematic diagram
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail
As shown in Figure 4: there is master, the high power DC controller of passive security defencive function, by isolating transformer T1, resistance R, capacitor C, triode S, rectifier diode V, voltage-stabiliser tube D, field effect transistor Q, control relay K1 forms, the output of isolating transformer T1 arranges four rectifier diode V3, V4, V5, V6, four rectifier diode V3, V4, V5, the rear voltage-stabiliser tube D4 in parallel of V6 outer series connection one resistance R 13, one resistance R 14, one capacitor C 6, three field effect transistor Q, its three field effect transistor Q1, Q2, parallel with one another between Q3, three field effect transistor Q loong shunt overvoltage protection parts 2, the quick overtemperature protection part 3 of connecting, isolating transformer T1 importation arranges triode S2, triode S3, resistance R 11, resistance R 12, capacitor C 4, capacitor C 5, the B of its triode S3, E end series connection one capacitor C 4, one resistance R 11, its capacitor C 4 is in parallel with resistance R 11, the C of its triode S2, E holds voltage-limiting protection part 1 in parallel, one resistance R 5, one resistance R 3, one capacitor C 2, one capacitor C 1, one rectifier diode V2, one resistance R 1, the line Bao Duan of its rectifier diode V2 two ends control relay K1 in parallel, the C of its triode S2, E end series connection one resistance R 2, one resistance R 4, one voltage-stabiliser tube D1, one rectifier diode V1, the B of its triode S2, E end series connection one resistance R 12, one capacitor C 5, its resistance R 12 is in parallel with capacitor C 5, and voltage-limiting protection part 1 is by voltage comparator L1, resistance R, triode S, voltage-stabiliser tube D, capacitor C, two-way twin zener dioder Y forms, and voltage comparator L1 is in parallel with two-way twin zener dioder Y1, and the input negative terminal of its voltage comparator L1 arranges a resistance R 6, one resistance R 7, the input anode of voltage comparator L1 arranges a voltage-stabiliser tube D2, one resistance R 8, one capacitor C 3, the output of voltage comparator L1 sets gradually resistance R 9, voltage-stabiliser tube D3, resistance R 10, triode S1, output overvoltage protection part 2 is by capacitor C 7, resistance R 15 and two-way twin zener dioder Y2 form, its capacitor C 7 two-way twin zener dioder Y2 in parallel afterwards that connect with resistance R 15, and quick overtemperature protection part 3 is by temperature thermal protector BX1, resistance R 16, control relay K1 forms, and its temperature thermal protector BX1 is in parallel with resistance R 16, and the output of its control relay K1 is connected with resistance R 16.
1, importation: described importation adopts DC input voitage; through voltage stabilizing didoe (D1), current-limiting resistance (R2), to subsequent conditioning circuit, provide stable working direct current, reverse protection diode (V1) avoids the reversal connection of input both positive and negative polarity to cause high power DC controller to damage.
2, isolated part: the two-way self-maintained circuit of recommending that described isolated part consists of triode (S2, S3), resistance (R11, R12), electric capacity (C4, C5) and isolating transformer T1 changes input direct voltage signal into ac voltage signal, adopt after isolating transformer coupling isolation, four rectifier diodes (V3, V4, V5, V6) by being connected with transformer secondary output, current-limiting resistance (R13), voltage-stabiliser tube (D4) provide the direct-current working volts of reasonably stability for executive circuit.
3, operating part: described operating part is comprised of three power field effect pipes in parallel (Q1, Q2, Q3), when buffer circuit provides the direct voltage of reasonably stability, power field effect pipe is connected; When buffer circuit does not provide direct voltage, power field effect pipe turn-offs.Between output and isolated part, add RC discharge loop (R14, C6) to discharge to power field effect pipe, avoid the G utmost point (grid) of field effect transistor because stored charge produces damage to the output circuit of high power DC controller, guaranteed output field effect transistor is normally worked.
the topmost part of the present invention is: active safety protection part and passive security protection part.
active safety protection part
Filtering part: described filtering part adopts RC filter circuit to realize, the direct voltage of high power DC controller work is by the further backward rear transmission of current limliting of current-limiting resistance (R4); Importation passes over pulse interference signal and absorbs by filter capacitor (C1, C2), avoids pulse interference signal to transmit backward damage high power DC controller.
The input of pressure limited protection circuit by two-way twin zener dioder (Y1) by high voltage interference signal suppressing in reasonable low voltage value, by divider resistance (R6, R7), input signal is carried out to dividing potential drop, voltage division signal is as "-" end of reference signal input voltage comparator (L1) simultaneously; The voltage of input signal after voltage stabilizing didoe (D2), current-limiting resistance (R8), delay capacitor (C3) is as "+" end of sampled voltage input voltage comparator (L1).When sample voltage value "+" is during lower than reference voltage value "-", voltage comparator (L1) is not worked, and output is low level signal, and output triode (S1) is in off state; When sample voltage value "+" is during higher than reference voltage value "-", voltage comparator (L1) output high level signal, after voltage-stabiliser tube (D3) step-down, current-limiting resistance (R10) current limliting, connect output triode (S1), thereby connect high power DC controller.
By pressure limited protection circuit, the input voltage of connecting high power DC controller is controlled within the scope of certain voltage value, can effectively protect high power DC controller can not damage because of switching loss and high pressure disturbing pulse.
The voltage stabilization that overvoltage crowbar is exported field effect transistor two ends by two-way twin zener dioder (Y2) by high power DC controller is in range of set value; when there is spike interference voltage; the logical high withstand voltage electric capacity of excess capacity of interference voltage (C7) that exceeds two-way twin zener dioder (Y2) set point absorbs; the electric charge of the high withstand voltage electric capacity of large capacity (C7) accumulation discharges by resistance (R15), the stablizing of holding circuit.
passive security protection part:
Overtemperature protection part is carried out Real-Time Monitoring by control relay (K1) to the state of high power DC controller fast, and when high power DC controller is not worked or normally worked, MCH refractory ceramics heating plate resistance (R16) is not worked; When high power DC controller damages, because the failure mode of the power field effect pipe of output mostly is short-circuit failure, and while there is power field effect pipe short-circuit failure, input control circuit can not turn-off the output of high power DC controller, output remains conducting or half conducting state, whole auxiliary starting system is by continuous firing, because system load power large (2.2kw) can make engine and other related system have potential safety hazard.Overheating protection circuit is when monitoring high power DC controller output end Damage by Short Circuit fast, by control relay (K1), control MCH refractory ceramics heating plate resistance (R16) heating (MCH refractory ceramics heating plate can reach 650 ℃ and lasting maintenance at 30S internal surface temperature), the heat producing with the power output field effect transistor of damaging conducts to temperature thermal protector (BX1) jointly, when the temperature of temperature thermal protector (BX1) reaches 123 ℃, temperature thermal protector (BX1) fuses automatically, whole loop physics disconnects, cut off the output loop of high power DC controller, avoid the potential safety hazard that whole auxiliary starting system continuous firing causes in power field effect pipe short-circuit failure situation.Overtemperature protection part is comprised of temperature thermal protector (BX1), control relay (K1), MCH refractory ceramics heating plate resistance (R16) fast, wherein the protection temperature of temperature thermal protector (BX1) is 123 ℃, temperature thermal protector when temperature reaches 123 ℃ (BX1) fuses automatically, realize whole loop physics and disconnect, and MCH refractory ceramics heating plate resistance (R16) surface temperature can reach 650 ℃ and lasting maintenance in 30S; Its operating state be temperature thermal protector (BX1) connect with power field effect pipe access output, control relay (K1) control MCH refractory ceramics heating plate resistance (R16) whether in heated condition.When power field effect pipe short-circuit failure; the power field effect pipe caloric value of having damaged increases; input control signal is closed rear power field effect pipe all the time in conducting state simultaneously; at this moment control relay (K1) is connected, and makes temperature thermal protector (BX1), MCH refractory ceramics heating plate resistance (R16) form loop with ground (battery terminal negative).When the heat sending when the power field effect pipe having damaged and MCH refractory ceramics heating plate resistance (R16) continues to conduct to temperature thermal protector (BX1) jointly; temperature thermal protector (BX1) can automatically fuse in 3min; realizing whole loop physics disconnects; the output of high power DC controller is disconnected; the effectively whole auxiliary starting system of protection and other related system, thus realize the object that the short circuit failure mode of high power DC controller is converted into non-short circuit failure mode.
Claims (4)
1. there is master, the high power DC controller of passive security defencive function, by isolating transformer (T1), resistance (R), electric capacity (C), triode (S), rectifier diode (V), voltage-stabiliser tube (D), field effect transistor (Q), control relay (K1) forms, it is characterized in that: the output of isolating transformer (T1) arranges four rectifier diode (V3, V4, V5, V6), four rectifier diode (V3, V4, V5, V6) voltage-stabiliser tube in parallel (D4) after outer series connection one resistance (R13), one resistance (R14), one electric capacity (C6), three field effect transistor (Q), its three field effect transistor (Q1, Q2, Q3) parallel with one another between, three field effect transistor (Q) loong shunt overvoltage protection parts (2), the quick overtemperature protection part (3) of connecting, isolating transformer (T1) importation arranges triode (S2), triode (S3), resistance (R11), resistance (R12), electric capacity (C4), electric capacity (C5), the B of its triode (S3), E end series connection one electric capacity (C4), one resistance (R11), its electric capacity (C4) is in parallel with resistance (R11), the C of its triode (S2), E holds voltage-limiting protection part in parallel (1), one resistance (R5), one resistance (R3), one electric capacity (C2), one electric capacity (C1), one rectifier diode (V2), one resistance (R1), the line Bao Duan of its rectifier diode (V2) two ends control relays in parallel (K1), the C of its triode (S2), E end series connection one resistance (R2), one resistance (R4), one voltage-stabiliser tube (D1), one rectifier diode (V1), the B of its triode (S2), E end series connection one resistance (R12), one electric capacity (C5), its resistance (R12) is in parallel with electric capacity (C5).
2. according to claim 1 have a master, the high power DC controller of passive security defencive function, it is characterized in that: voltage-limiting protection part (1) is by voltage comparator (L1), resistance (R), triode (S), voltage-stabiliser tube (D), electric capacity (C), two-way twin zener dioder (Y) forms, voltage comparator (L1) is in parallel with two-way twin zener dioder (Y1), the input negative terminal of its voltage comparator (L1) arranges a resistance (R6), one resistance (R7), the input anode of voltage comparator (L1) arranges a voltage-stabiliser tube (D2), one resistance (R8), one electric capacity (C3), the output of voltage comparator (L1) sets gradually resistance (R9), voltage-stabiliser tube (D3), resistance (R10), triode (S1).
3. the high power DC controller with active and passive safety protection function according to claim 1; it is characterized in that: output overvoltage protection part (2) consists of electric capacity (C7), resistance (R15) and two-way twin zener dioder (Y2) its electric capacity (C7) two-way twin zener dioder in parallel (Y2) afterwards of connecting with resistance (R15).
4. the high power DC controller with active and passive safety protection function according to claim 1; it is characterized in that: overtemperature protection part (3) consists of temperature thermal protector (BX1), resistance (R16), control relay (K1) fast; its temperature thermal protector (BX1) is in parallel with resistance (R16), and the output of its control relay (K1) is connected with resistance (R16).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210480579.7A CN103746559A (en) | 2012-11-23 | 2012-11-23 | Large-power DC controller possessing active and passive safety protection functions |
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| CN201210480579.7A CN103746559A (en) | 2012-11-23 | 2012-11-23 | Large-power DC controller possessing active and passive safety protection functions |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020015273A1 (en) * | 2000-07-06 | 2002-02-07 | Lytollis Barry James | Protection of intrinsically sage circuits |
| CN2882068Y (en) * | 2006-01-13 | 2007-03-21 | 北京动力源科技股份有限公司 | Switch power supply burp protection circuit |
| CN201314267Y (en) * | 2008-11-28 | 2009-09-23 | 信息产业部电子第四十研究所华成高新技术公司 | Solid type diesel engine starting and preheating relay |
| CN102496914A (en) * | 2011-12-20 | 2012-06-13 | 信息产业部电子第四十研究所华成高新技术公司 | Preheating relay preventing short-circuit failure |
-
2012
- 2012-11-23 CN CN201210480579.7A patent/CN103746559A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020015273A1 (en) * | 2000-07-06 | 2002-02-07 | Lytollis Barry James | Protection of intrinsically sage circuits |
| CN2882068Y (en) * | 2006-01-13 | 2007-03-21 | 北京动力源科技股份有限公司 | Switch power supply burp protection circuit |
| CN201314267Y (en) * | 2008-11-28 | 2009-09-23 | 信息产业部电子第四十研究所华成高新技术公司 | Solid type diesel engine starting and preheating relay |
| CN102496914A (en) * | 2011-12-20 | 2012-06-13 | 信息产业部电子第四十研究所华成高新技术公司 | Preheating relay preventing short-circuit failure |
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Application publication date: 20140423 |