CN105978324A - Vehicle-mounted DC-DC large power conversion power supply of electromobile - Google Patents
Vehicle-mounted DC-DC large power conversion power supply of electromobile Download PDFInfo
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- CN105978324A CN105978324A CN201610308139.1A CN201610308139A CN105978324A CN 105978324 A CN105978324 A CN 105978324A CN 201610308139 A CN201610308139 A CN 201610308139A CN 105978324 A CN105978324 A CN 105978324A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Electric Propulsion And Braking For Vehicles (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a high-efficiency large-power conversion power supply of low voltage input and high voltage output, and solves the problem that a power supply of the electromobile is large is size and high in cost. The vehicle-mounted DC-DC large power conversion power supply of the electromobile is used to increase the voltage of a hydrogen cell, and comprises a power input circuit , a connection circuit, a current sensor, an absorption protection circuit, a PWM transformation circuit and a power output circuit, wherein the power input circuit is connected with the power output circuit via the PWM transformation circuit, and the current sensor and the absorption protection circuit are arranged between the power input circuit and the PWM transformation circuit; and the vehicle-mounted DC-DC large power conversion power supply is further provided with voltage sensors, the first voltage sensor is connected to the power input circuit directly, and the second voltage sensor is connected to the power output circuit. The power supply also comprises a communication panel which is connected with the current sensor, an input voltage detection circuit and the voltage sensors, and CANH and CANL interfaces are left in the communication panel.
Description
Technical field
The present invention relates to change power supply, specifically provide a kind of electric automobile high-power converting power source of vehicle-mounted DCDC.
Background technology
Along with problem of environmental pollution constantly highlights, efficiently having utilized into one of effective means solving the problems referred to above of the clean energy resourcies such as traditional petroleum-based energy cannot meet the power demand of present auto industry already, hydrogen energy source.The fuel of hydrogen fuel cell is hydrogen and oxygen, and its product is only water, does not has any other to include the pollutant emissions such as hydrocarbon, sulfide, dust, and therefore hydrogen cell automobile is the car of zero-emission truly, no pollution.
But different from the electrical energy storage device such as aneroid battery, accumulator, hydrogen fuel cell stricti jurise is generating equipment, operation principle is similar to power plant, is the electrochemistry generating means converting chemical energy into electric energy.Hydrogen fuel cell single battery voltage is about at about 1V, and therefore in the middle of current use process, hydrogen fuel cell needs to be used in series.But, inputting to obtain the voltage of high pressure, need multiple batteries of connecting, the bulky structure of to produced hydrogen fuel cell is complicated, problem with high costs.
Meanwhile, current booster power kind has full-bridge, recommends power supply etc..When 30V ~ 60V low-pressure high-power, efficiency is low is less than 70% for full-bridge power supply, and it is little the most all at below 1KW to recommend power, it is impossible to meet existing power demand.
Summary of the invention
It is an object of the invention to provide the input of a kind of high efficiency low-voltage, the high-power converting power source of high voltage output, solve the problem that electric car power supply volume is big, cost is high.
The present invention specifically provides a kind of electric automobile high-power converting power source of vehicle-mounted DCDC; for promoting hydrogen fuel cell voltage; it is characterized in that: include power supply input circuit, connect circuit, current sensor, absorption protection circuit, PWM translation circuit and power output circuit; wherein: power supply input circuit connects power output circuit, current sensor and absorption protection circuit by PWM translation circuit and is arranged between power supply input circuit and PWM translation circuit；
The high-power converting power source of the vehicle-mounted DCDC of described electric automobile also sets up voltage sensor, and voltage sensor I is directly connected to power supply input circuit, and voltage sensor II connects power output circuit.
Concrete, absorb protection circuit and be connected in parallel on the combination inducer L1 of one end connection power supply input circuit positive pole；Absorbing resistance R1 in protection circuit and connect power supply input circuit positive pole, the resistance R1 other end connects the negative pole of diode D1, and the positive pole of diode D1 connects PWM translation circuit；Current sensor negative pole connects the positive pole of power supply input circuit, and the positive pole of current sensor connects absorption protection circuit.
Excessive voltage can be produced at IGBT shutdown moment; in order to prevent inductance from damaging, IGBT conducting moment limits flows through the electric current of inductance, alleviates power electronic component and receives threat in switching process; the present invention is provided with absorption protection circuit, it is possible to the effectively buffering above-mentioned voltage destruction to inductance.
The described high frequency power inductance that combination inducer L1 is nanometer iron core combination.Combination inductance includes skeleton, winding, radome, encapsulating material, magnetic core or iron core；Wherein iron core is combined by magicore and intermediate frequency ferrocart core.
Combination inductance use two or three in the present invention is with the iron core superposition of size different materials, and is wound around with copper cash.Purpose in aforementioned manners is made to be reduce the volume of inductance and alleviate inductor body weight.As used traditional inductance winding mode, reaching same electric current, if only using a kind of iron core, the coil turn that needs are wound around is the several times of inductance of the present invention, and current saturation degree and circuit stability are the best.Use the combination inductance that the method for the invention prepares, the high-intensity currrent that can meet high-frequency inductor is unsaturated, meet inductance value simultaneously and make by small area analysis greatly the most interrupted, and then reduce input current peak value, avoid the problem by big current saturation, inductance value dramatic decrease occurring because of inductance, ensure that stablizing of circuit performance, it is ensured that the electric motor car of circuit of the present invention and application can be properly functioning.And improve work efficiency and economic benefit.
The positive pole of described PWM translation circuit diode D2 and the emitter stage of IGBTQ1 connect absorption protection circuit, the negative pole of diode D2 and the colelctor electrode of IGBTQ1, gate leve and connect the positive pole of power output circuit；The positive pole of diode D3 and the colelctor electrode of IGBTQ2 connect absorption protection circuit, the negative pole of diode D3 and the emitter stage of IGBTQ2 and connect the negative pole of power output circuit, and the gate leve of IGBTQ2 connects PWM control circuit board.
The negative pole of the cathode connecting diode D4 of power output circuit, PWM translation circuit connects the positive pole of diode D4；Capacitor C1 one end connects the positive pole of diode D4, and the other end connects the negative pole of power output circuit；Resistance R2 one end connects the positive pole of diode D4, and the other end connects the negative pole of power output circuit.
Voltage sensor I is directly connected to positive pole and the negative pole of power supply input circuit, and voltage sensor II is in parallel with resistance R2.
Power supply input circuit is also provided with input voltage detection circuit, and the two ends of input voltage detection circuit connect positive pole and the negative pole of power supply input circuit respectively.
The present invention is additionally provided with communication board, communication board connection current inductor, input voltage detection circuit, voltage sensor II, voltage sensor I, and indwelling CANH and CANL interface.
The present invention is additionally provided with PWM panel, and PWM panel connects current inductor, voltage sensor I, voltage sensor II, input voltage detection circuit, the gate leve of IGBTQ2 respectively.
The PWM panel that the present invention is arranged is PWM efficient current voltage two close cycles quick feedback control circuit, and current inductor, voltage sensor carry out sample detecting to input current, input voltage, output voltage, and implement to control in real time, it is ensured that system worked well.
In addition, the communication board that the present invention is arranged is to detecting from current inductor, voltage sensor sample rate current and voltage and making data conversion, data result after conversion is transmitted by CAN simultaneously, and then control system normally works, and reaches the purpose of real-time monitoring system duty.
The electronic circuit using inductance and IGBT electrical combination in the present invention forms high power topology Power Electronic Circuit, concurrently form BOOST type circuit topology, the efficiency of BOOST code converter can be up to more than 90%, improves 10 ~ 15% compared to the work efficiency of traditional circuit.
In addition, use the electric automobile of the present invention high-power converting power source of vehicle-mounted DCDC, the serial number using tradition hydrogen battery 1/3rd i.e. can reach the voltage output that equivalent amount battery provides, the complexity having simplified hydrogen energy source battery of high degree, significantly control the expenditure of cost, reduce the heat-energy losses that hydrogen energy source produces in burning simultaneously, improve the efficiency of hydrogen fuel cell group system.
Present invention employs novel ferrocart core combination high frequency power inductance and there is following advantages:
1, volume is little, lightweight；In converting power source of the present invention, the weight of combination inductance is overall 1/3rd, combination inductance of the present invention than traditional inductance few reduce coil 30% or more than, decrease copper consumption, economic benefit is objective, alleviates the weight that invention is overall simultaneously；
2, solve electric current from underloading to heavy duty, ensure the problem that electric current continuous-stable passes through；Underloading electric current discontinuously passes through, then there will be power supply characteristic corruptions；The big electric current of heavy duty can make inductance saturated, makes inductance out of control, power supply characteristic corruptions occurs；
3, circuit efficiency significantly improves, and uses this combination inductance, and the electric current of general loop of power circuit is big, and compared to power inductance, efficiency is greatly improved；
4, ensure that stablizing of circuit performance, it is ensured that the electric motor car of circuit of the present invention and application can be properly functioning, and improve work efficiency and economic benefit.
The communication board of the present invention uses CAN communication to have a following advantages:
1, have that real-time, long transmission distance, anti-electromagnetic interference capability be strong, low cost and other advantages；
2, using two wire serial communication mode, error detecing capability is strong, can work in strong noise interference environment；
3, having priority and arbitration function, multiple control modules are suspended on CAN-bus by CAN controller, form many main frames localized network；
4, can determine receive or shield this message according to the ID of message；
5, reliable fault processing and error-detection mechanism；
6, after the information sent is destroyed, can automatically retransmit；
7, node has the function automatically exiting from bus in the case of mistake is serious；
8, message does not comprise source address or destination address, only indicates function information, precedence information by identifier.
Accompanying drawing explanation
Below in conjunction with Figure of description, the present invention is described in further details:
Fig. 1 is the vehicle-mounted DCDC of electric automobile high-power converting power source circuit diagram；
Fig. 2 is the vehicle-mounted DCDC of electric automobile high-power converting power source electrical schematic diagram.
Detailed description of the invention
Embodiment 1
The purpose of the present embodiment is to provide the input of a kind of high efficiency low-voltage, the high-power converting power source of high voltage output, solves the problem that electric car power supply volume is big, cost is high.
The present embodiment specifically provides a kind of electric automobile high-power converting power source of vehicle-mounted DCDC; for promoting hydrogen fuel cell voltage; it is characterized in that: include power supply input circuit, connect circuit, current sensor, absorption protection circuit, PWM translation circuit and power output circuit; wherein: power supply input circuit connects power output circuit, current sensor and absorption protection circuit by PWM translation circuit and is arranged between power supply input circuit and PWM translation circuit；
The high-power converting power source of the vehicle-mounted DCDC of described electric automobile also sets up voltage sensor, and voltage sensor I is directly connected to power supply input circuit, and voltage sensor II connects power output circuit.
Concrete, absorb protection circuit and be connected in parallel on the combination inducer L1 of one end connection power supply input circuit positive pole；Absorbing resistance R1 in protection circuit and connect power supply input circuit positive pole, the resistance R1 other end connects the negative pole of diode D1, and the positive pole of diode D1 connects PWM translation circuit；Current sensor negative pole connects the positive pole of power supply input circuit, and the positive pole of current sensor connects absorption protection circuit.
Excessive voltage can be produced at IGBT shutdown moment; in order to prevent inductance from damaging, IGBT conducting moment limits flows through the electric current of inductance, alleviates power electronic component and receives threat in switching process; the present embodiment is provided with absorption protection circuit, it is possible to the effectively buffering above-mentioned voltage destruction to inductance.
The described high frequency power inductance that combination inducer L1 is nanometer iron core combination.Combination inductance includes skeleton, winding, radome, encapsulating material, magnetic core or iron core；Wherein iron core is combined by magicore and intermediate frequency ferrocart core.
Combination inductance use two or three in the present embodiment is with the iron core superposition of size different materials, and is wound around with copper cash.Purpose in aforementioned manners is made to be reduce the volume of inductance and alleviate inductor body weight.As used traditional inductance winding mode, reaching same electric current, if only using a kind of iron core, the coil turn that needs are wound around is the several times of inductance described in the present embodiment, and current saturation degree and circuit stability are the best.Use the combination inductance that method described in the present embodiment prepares, the high-intensity currrent that can meet high-frequency inductor is unsaturated, meet inductance value simultaneously and make by small area analysis greatly the most interrupted, and then reduce input current peak value, avoid the problem by big current saturation, inductance value dramatic decrease occurring because of inductance, ensure that stablizing of circuit performance, it is ensured that circuit and the electric motor car of application described in the present embodiment can be properly functioning.And improve work efficiency and economic benefit.
The positive pole of described PWM translation circuit diode D2 and the emitter stage of IGBTQ1 connect absorption protection circuit, the negative pole of diode D2 and the colelctor electrode of IGBTQ1, gate leve and connect the positive pole of power output circuit；The positive pole of diode D3 and the colelctor electrode of IGBTQ2 connect absorption protection circuit, the negative pole of diode D3 and the emitter stage of IGBTQ2 and connect the negative pole of power output circuit, and the gate leve of IGBTQ2 connects PWM control circuit board.
The negative pole of the cathode connecting diode D4 of power output circuit, PWM translation circuit connects the positive pole of diode D4；Capacitor C1 one end connects the positive pole of diode D4, and the other end connects the negative pole of power output circuit；Resistance R2 one end connects the positive pole of diode D4, and the other end connects the negative pole of power output circuit.
Voltage sensor I is directly connected to positive pole and the negative pole of power supply input circuit, and voltage sensor II is in parallel with resistance R2.
Power supply input circuit is also provided with input voltage detection circuit, and the two ends of input voltage detection circuit connect positive pole and the negative pole of power supply input circuit respectively.
The present embodiment is additionally provided with communication board, communication board connection current inductor, input voltage detection circuit, voltage sensor II, voltage sensor I, and indwelling CANH and CANL interface.
The present embodiment is additionally provided with PWM panel, and PWM panel connects current inductor, voltage sensor I, voltage sensor II, input voltage detection circuit, the gate leve of IGBTQ2 respectively.
The PWM panel that the present embodiment is arranged is PWM efficient current voltage two close cycles quick feedback control circuit, current inductor, voltage sensor carry out sample detecting to input current, input voltage, output voltage, and implement to control in real time, it is ensured that system worked well.
In addition, the communication board that the present embodiment is arranged is to detecting from current inductor, voltage sensor sample rate current and voltage and making data conversion, data result after conversion is transmitted by CAN simultaneously, and then control system normally works, and reaches the purpose of real-time monitoring system duty.
The electronic circuit using inductance and IGBT electrical combination in the present embodiment forms high power topology Power Electronic Circuit, concurrently form BOOST type circuit topology, the efficiency of BOOST code converter can be up to more than 90%, improves 10 ~ 15% compared to the work efficiency of traditional circuit.
In addition, use the electric automobile high-power converting power source of vehicle-mounted DCDC described in the present embodiment, the serial number using tradition hydrogen battery 1/3rd i.e. can reach the voltage output that equivalent amount battery provides, the complexity having simplified hydrogen energy source battery of high degree, significantly control the expenditure of cost, reduce the heat-energy losses that hydrogen energy source produces in burning simultaneously, improve the efficiency of hydrogen fuel cell group system.
The present embodiment have employed novel ferrocart core combination high frequency power inductance and has a following advantages:
1, volume is little, lightweight；In the converting power source described in the present embodiment, the weight of combination inductance is overall 1/3rd, the combination inductance described in the present embodiment than traditional inductance few reduce coil 30% or more than, decrease copper consumption, economic benefit is objective, alleviates the weight that embodiment is overall simultaneously；
2, solve electric current from underloading to heavy duty, ensure the problem that electric current continuous-stable passes through；Underloading electric current discontinuously passes through, then there will be power supply characteristic corruptions；The big electric current of heavy duty can make inductance saturated, makes inductance out of control, power supply characteristic corruptions occurs；
3, circuit efficiency significantly improves, and uses this combination inductance, and the electric current of general loop of power circuit is big, and compared to power inductance, efficiency is greatly improved；
4, ensure that stablizing of circuit performance, it is ensured that circuit and the electric motor car of application described in the present embodiment can be properly functioning, and improve work efficiency and economic benefit.
The communication board of the present embodiment uses CAN communication to have a following advantages:
1, have that real-time, long transmission distance, anti-electromagnetic interference capability be strong, low cost and other advantages；
2, using two wire serial communication mode, error detecing capability is strong, can work in strong noise interference environment；
3, having priority and arbitration function, multiple control modules are suspended on CAN-bus by CAN controller, form many main frames localized network；
4, can determine receive or shield this message according to the ID of message；
5, reliable fault processing and error-detection mechanism；
6, after the information sent is destroyed, can automatically retransmit；
7, node has the function automatically exiting from bus in the case of mistake is serious；
8, message does not comprise source address or destination address, only indicates function information, precedence information by identifier.
Embodiment 2
Voltage detecting circuit in the present embodiment is surface-mounted integrated circuit VCR80/12, and panel is surface-mounted integrated circuit PWM25ZB, and remaining structure, technical scheme, embodiment, Expected Results are same as in Example 1.
Embodiment 3
The present embodiment is in addition to using general ordinary inductor, and remaining structure, technical scheme, embodiment, Expected Results are same as in Example 1.
Embodiment 4
The present embodiment is in addition to being not provided with filter capacitor C1, and remaining structure, technical scheme, embodiment, Expected Results are same as in Example 1.
Embodiment 5
The present embodiment is in addition to being not provided with counnter attack diode D4, and remaining structure, technical scheme, embodiment, Expected Results are same as in Example 1.
Embodiment 6
The present embodiment is in addition to being not provided with filter capacitor C1 and counnter attack diode D4, and remaining structure, technical scheme, embodiment, Expected Results are same as in Example 1.
Embodiment 7
The present embodiment arranges electric fuse, and remaining structure, technical scheme, embodiment, Expected Results are same as in Example 1.
Above-described embodiment only for technology design and the feature of the present invention are described, its object is to allow person skilled in the art will appreciate that present disclosure and to implement according to this, can not limit the scope of the invention with this.All equivalence changes made according to spirit of the invention or modification, all should contain within protection scope of the present invention.
Claims (10)
1. the electric automobile high-power converting power source of vehicle-mounted DCDC; for promoting hydrogen fuel cell voltage; it is characterized in that: include power supply input circuit, connect circuit, current sensor, absorption protection circuit, PWM translation circuit and power output circuit; wherein: power supply input circuit connects power output circuit, current sensor and absorption protection circuit by PWM translation circuit and is arranged between power supply input circuit and PWM translation circuit；
The high-power converting power source of the vehicle-mounted DCDC of described electric automobile also sets up voltage sensor, and voltage sensor I is directly connected to power supply input circuit, and voltage sensor II connects power output circuit.
2. according to the high-power converting power source of vehicle-mounted DCDC of electric automobile described in claim 1, it is characterised in that: absorb protection circuit and be connected in parallel on the combination inducer L1 of one end connection power supply input circuit positive pole；Absorbing resistance R1 in protection circuit and connect power supply input circuit positive pole, the resistance R1 other end connects the negative pole of diode D1, and the positive pole of diode D1 connects PWM translation circuit；
Current sensor negative pole connects the positive pole of power supply input circuit, and the positive pole of current sensor connects absorption protection circuit.
3. according to the high-power converting power source of vehicle-mounted DCDC of electric automobile described in claim 2, it is characterised in that: the described high frequency power inductance that combination inducer L1 is nanometer iron core combination.
4. according to the high-power converting power source of vehicle-mounted DCDC of electric automobile described in claim 3, it is characterised in that: described combination inductance includes skeleton, winding, radome, encapsulating material, magnetic core or iron core；Wherein iron core is combined by magicore and intermediate frequency ferrocart core.
5. according to the high-power converting power source of vehicle-mounted DCDC of electric automobile described in claim 1; it is characterized in that: the positive pole of described PWM translation circuit diode D2 and the emitter stage of IGBTQ1 connect absorption protection circuit, the negative pole of diode D2 and the colelctor electrode of IGBTQ1, gate leve and connect the positive pole of power output circuit；
The positive pole of diode D3 and the colelctor electrode of IGBTQ2 connect absorption protection circuit, the negative pole of diode D3 and the emitter stage of IGBTQ2 and connect the negative pole of power output circuit, and the gate leve of IGBTQ2 connects PWM control circuit board.
6. according to the high-power converting power source of vehicle-mounted DCDC of electric automobile described in claim 1, it is characterised in that: the negative pole of the cathode connecting diode D4 of power output circuit, PWM translation circuit connects the positive pole of diode D4；Capacitor C1 one end connects the positive pole of diode D4, and the other end connects the negative pole of power output circuit；Resistance R2 one end connects the positive pole of diode D4, and the other end connects the negative pole of power output circuit.
7. according to the high-power converting power source of vehicle-mounted DCDC of electric automobile described in claim 1, it is characterised in that: voltage sensor I is directly connected to positive pole and the negative pole of power supply input circuit, and voltage sensor II is in parallel with resistance R2.
8. according to the high-power converting power source of vehicle-mounted DCDC of electric automobile described in claim 1, it is characterised in that: power supply input circuit is also provided with input voltage detection circuit, and the two ends of input voltage detection circuit connect positive pole and the negative pole of power supply input circuit respectively.
9. according to the high-power converting power source of vehicle-mounted DCDC of electric automobile described in claim 1, it is characterized in that: the high-power converting power source of the vehicle-mounted DCDC of electric automobile is provided with communication board, communication board connects current inductor, input voltage detection circuit, voltage sensor II, voltage sensor I, and indwelling CANH and CANL interface.
10. according to the high-power converting power source of vehicle-mounted DCDC of electric automobile described in claim 1, it is characterized in that: the high-power converting power source of the vehicle-mounted DCDC of electric automobile is provided with PWM panel, PWM panel connects current inductor, voltage sensor I, voltage sensor II, input voltage detection circuit, the gate leve of IGBTQ2 respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610308139.1A CN105978324A (en) | 2016-05-11 | 2016-05-11 | Vehicle-mounted DC-DC large power conversion power supply of electromobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610308139.1A CN105978324A (en) | 2016-05-11 | 2016-05-11 | Vehicle-mounted DC-DC large power conversion power supply of electromobile |
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| CN105978324A true CN105978324A (en) | 2016-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610308139.1A Pending CN105978324A (en) | 2016-05-11 | 2016-05-11 | Vehicle-mounted DC-DC large power conversion power supply of electromobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3806309A4 (en) * | 2018-05-29 | 2021-06-02 | Mitsubishi Electric Corporation | Power conversion device |
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| JP2002095245A (en) * | 2000-09-11 | 2002-03-29 | Tohoku Ricoh Co Ltd | Dc-dc converter |
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Application publication date: 20160928 |