CN103042926A - Tractor protection method for new energy automobile and implementation circuit - Google Patents
Tractor protection method for new energy automobile and implementation circuit Download PDFInfo
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- CN103042926A CN103042926A CN2012105140358A CN201210514035A CN103042926A CN 103042926 A CN103042926 A CN 103042926A CN 2012105140358 A CN2012105140358 A CN 2012105140358A CN 201210514035 A CN201210514035 A CN 201210514035A CN 103042926 A CN103042926 A CN 103042926A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention discloses a tractor protection method for a new energy automobile. When the new energy automobile is pulled to move, a three-phase short-circuit mode on the high-voltage side of an inverter is started, and simultaneously, cooling devices are started to cool down the high-voltage side of the inverter and a permanent magnet synchronous motor. When the pulling of the new energy automobile is stopped, the three-phase short-circuit mode on the high-voltage side of the inverter is turned off, and simultaneously, all cooling devices are turned off. The three-phase short-circuit mode on the high-voltage side of the inverter comprises that power switch devices of three upper bridge arms are turned off and power switch devices of three lower bridge arms are turned on simultaneously; or power switch devices of three upper bridge arms are turned on and power switch devices of three lower bridge arms are turned off simultaneously. The invention also discloses a corresponding implementation circuit. By the aid of the method and the circuit, a special tractor is not required to be used when the new energy automobile breaks down and is pulled to move, the pulling time or the speed is not limited, and the new energy automobile can be pulled to move freely.
Description
Technical field
The application relates to the trailer guard method of a kind of new-energy automobile (comprising electronlmobil, hybrid vehicle etc.) and the circuit structure of realizing this trailer guard method.
Background technology
See also Fig. 1, this is the rough schematic view of the electric machine control system of new-energy automobile.Described electric machine control system comprises:
---permagnetic synchronous motor 1, its mechanical output shaft links to each other with the driving system of new-energy automobile, is new-energy automobile output torque and power.When permagnetic synchronous motor 1 is dragged at a high speed, also generate conversely three plase alternating current.
---inverter 2 is divided into high pressure side 21 and the low pressure side 22 of mutual electrical isolation.
---high-tension battery 3, voltage are usually more than the hundreds of volt.
---A-battery 4, voltage are generally tens volts, such as 12V, 24V etc.
The dc terminal of described high pressure side 21 links to each other with high-tension battery 3, exchanges end and links to each other with the three plase alternating current port of permagnetic synchronous motor 1, plays driving permagnetic synchronous motor 1 output torque and power, and the effect of the braking energy of feedback permagnetic synchronous motor 1.Three-phase inverter bridge circuit is adopted in common high pressure side 21, is composed in parallel by bus capacitor C1 and three brachium pontis.Each brachium pontis is comprised of two power switching device series, and each device for power switching is diode of reverse parallel connection also.Device for power switching commonly used comprises IGBT device, metal-oxide-semiconductor etc.
Described low pressure side 22 comprises low voltage control system, collecting sensor signal module, communication module etc.Described low voltage control system is exactly the control chip of described electric machine control system, comprises the DSP(digital signal processor), the MCU(micro-control unit) etc.The on the one hand power supply take A-battery 4 as low-voltage equipment of low pressure side 22 is controlled low-voltage equipment with the driving signal of low voltage control system output on the other hand.For example, the working power of each device for power switching of high pressure side 21, control signal all come from low pressure side 22.
When normal vehicle operation, high-tension battery 3 drives permagnetic synchronous motor 1 by the high pressure side 21 of inverter 2.When vehicle breaks down and when being dragged, permagnetic synchronous motor 1 rotates because of dragging, and will produce counter potential, be that bus capacitor C1 charges by each diode in the high pressure side 21 of inverter 2.And the device for power switching in the high pressure side 21 and bus capacitor C1 etc. are the voltage-sensitive device.The counter potential that permagnetic synchronous motor 1 was produced when vehicle was towed may be to these voltage-sensitive device injuries.
A kind of trailer guard method of existing new-energy automobile is: the drive wheel with permagnetic synchronous motor 1 during trailer lifts, and tows in the process permagnetic synchronous motor 1 at vehicle like this and just can not rotate, thereby can not produce counter potential.This method must could be realized by exclusive trail car.
The trailer guard method of another kind of existing new-energy automobile is: the rotating speed of restriction permagnetic synchronous motor 1 during trailer makes the counter potential of its generation can be to voltage-sensitive device injury.This method has been brought difficulty to the design of the motor driven systems of new-energy automobile.
Summary of the invention
The application's technical matters to be solved provides a kind of trailer guard method of new-energy automobile, and the method can allow new-energy automobile not towed by time, speed restriction ground, and still can guarantee the safety of the nucleus equipments such as permagnetic synchronous motor, inverter.For this reason, the application also will provide the realization circuit of the trailer guard method of described new-energy automobile.
For solving the problems of the technologies described above, the trailer guard method of the application's new-energy automobile is: when new-energy automobile is towed, open the on high-tension side three phase short circuit pattern of inverter, opening simultaneously cooling intallation is inverter and permagnetic synchronous motor heat radiation;
When new-energy automobile stops to tow, close the on high-tension side three phase short circuit pattern of inverter, close simultaneously all cooling intallationes;
The on high-tension side three phase short circuit pattern of described inverter is: the device for power switching of the device for power switching Close All of three upper brachium pontis, while three lower brachium pontis is all opened; Perhaps the device for power switching of three upper brachium pontis all open, the device for power switching Close All of three lower brachium pontis simultaneously.
The realization circuit of the trailer guard method of described new-energy automobile comprises:
---linear voltage-stabilizing circuit, in parallel with bus capacitor with the acquisition power supply, and generate an interim low potential source;
---circuit parallel receives normal low potential source and inputs independently of each other with interim low potential source, and is the half-bridge driven module for power supply;
---the half-bridge driven module, be subject to the control of the driving signal that decision circuit sends, open or close on high-tension side each device for power switching of inverter;
---decision circuit receives the input of normal low potential source and driven signal, and sends the driving signal to the half-bridge driven module; When normal low potential source is invalid, decision circuit is to the default level signal of half-bridge driven module output; When normal low potential source is effective, the normal signal that drives of decision circuit output.
In case the high pressure side of inverter enters the three phase short circuit pattern, then so that the inverse electromotive force that permagnetic synchronous motor produces can not continue to raise again, this overvoltage that has prevented that just electronics package from may occur damages.Yet under the three phase short circuit pattern, the high pressure side of inverter, permagnetic synchronous motor all can have larger phase current, thereby produce larger heat.Therefore the application opens cooling intallation when entering the three phase short circuit pattern, with the mistake cause thermal damage that prevents that inverter and permagnetic synchronous motor from may occur.Therefore, the described method of the application and realize circuit so that new-energy automobile when being towed breaking down, can not use exclusive trail car does not tow the restriction on time or the speed yet, can freely be towed.
Description of drawings
Fig. 1 is the structural representation of the electric machine control system of new-energy automobile;
Fig. 2 is the diagram of circuit of the trailer guard method of the application's new-energy automobile;
Fig. 3 is the schematic diagram of electric machine control system when vehicle hinders by trailer for some reason of new-energy automobile;
Fig. 4 is a kind of schematic diagram of realizing circuit of the trailer guard method of the application's new-energy automobile;
Fig. 5 is the schematic diagram that the another kind of the trailer guard method of the application's new-energy automobile is realized circuit.
Description of reference numerals among the figure:
1 is permagnetic synchronous motor; 2 is inverter; 21 is the high pressure side; 211 is linear voltage-stabilizing circuit; 212 is circuit parallel; 213 is the half-bridge driven module; 214 is decision circuit; 215 is isolating transformer; 22 is low pressure side; 3 is high-tension battery; 4 is A-battery; 41 is the low-voltage power supply relay; 5 is cooling intallation.
The specific embodiment
See also Fig. 2 and Fig. 3, the below will be described in detail with the trailer guard method of a specific embodiment to the application's new-energy automobile.
The electric machine control system of described new-energy automobile comprises permagnetic synchronous motor 1, inverter 2, high-tension battery 3 and A-battery 4.Inverter 2 is divided into again high pressure side 21 and low pressure side 22, between the two electrical isolation.During normal operation, high pressure side 21 is converted to three plase alternating current with the high-voltage direct current of high-tension battery 3, to drive permagnetic synchronous motor 1.The feedback energy of permagnetic synchronous motor 1 is also changed by high pressure side 21 and is high-tension battery 3 chargings.Low pressure side 22 for the low-voltage equipment power supply, is also controlled low-voltage equipment with the driving signal of low voltage control system with A-battery 4.Cooling intallation 5 is exactly a kind of typical low-voltage equipment, and it comprises cooling fan, cooling water pump etc.The device for power switching of high pressure side 21 etc. are also provided low potential source and are driven signal by low pressure side 22.
When new-energy automobile breaks down, for guaranteeing safety, high-tension battery 3 disconnects with the high pressure side 21 of inverter 2, also disconnected by relay (being equivalent to switch) 41 between the low pressure side 22 of A-battery 4 and inverter 2, six device for power switching in three brachium pontis of the high pressure side 21 of inverter 2 all turn-off.At this moment, low pressure side 22 can't obtain power supply from A-battery 4, thereby comprises that all low-voltage equipments of the device for power switching of cooling intallation 5, high pressure side 21 all do not have power supply and driving.
The application will open the three phase short circuit pattern of the high pressure side 21 of inverter 2 when new-energy automobile is towed this moment, and high pressure side 21 and the permagnetic synchronous motor 1 of opening simultaneously 5 pairs of inverters 2 of cooling intallation dispel the heat.High pressure side 21 and the permagnetic synchronous motor 1 of inverter 2 can share cooling intallation 5, also can have separately independently cooling intallation 5.When new-energy automobile stops to tow, withdraw from the three phase short circuit pattern (six device for power switching namely getting back in three brachium pontis of high pressure side 21 of inverter 2 all turn-off) of the high pressure side 21 of inverter 2, simultaneously closeall cooling intallation 5.
The three phase short circuit pattern of the high pressure side 21 of described inverter 2 is: the device for power switching of the device for power switching Close All of three upper brachium pontis, while three lower brachium pontis is all opened; Perhaps the device for power switching of three upper brachium pontis all open, the device for power switching Close All of three lower brachium pontis simultaneously.
See also Fig. 4, the realization circuit one that it has provided the trailer guard method of the application's new-energy automobile is used for making the three-phase brachium pontis of the high pressure side 21 of inverter 2 to enter the three phase short circuit pattern.Described realization circuit one is all in the high pressure side of inverter, and it comprises:
---linear voltage-stabilizing circuit 211, in parallel with bus capacitor C1 with the acquisition power supply, and generate an interim low potential source.Hinder for some reason when being towed at new-energy automobile, bus capacitor C1 is in charge condition, thereby linear voltage-stabilizing circuit 211 is powered by acquisition in parallel with bus capacitor C1.
---circuit parallel 212 receives normal low potential source and the temporarily input of low potential source, and is 213 power supplies of half-bridge driven module.Described normal low potential source refers to pass through the low pressure side of inverters 2 and the low potential source that on high-tension side isolation conversion generates by A-battery 4.When new-energy automobile broke down, owing to the low pressure side 22 of A-battery 4 with inverter 2 disconnects, thereby this normal low potential source was unavailable.Described interim low potential source is exactly that linear voltage-stabilizing circuit 211 generates, and it is the same with normal low potential source, for example is 15V, and both access circuit parallel 212 independently of each other.Like this, as long as one of normal low potential source or interim low potential source effective (when being 15V), circuit parallel 212 namely can be 213 power supplies of half-bridge driven module.
---half-bridge driven module 213 is subject to the control of the driving signal that decision circuit 214 sends, each device for power switching of opening or closing the high pressure side 21 of inverter 2.Exemplary table illustrates the device for power switching that half-bridge driven module 213 only connects three lower brachium pontis among Fig. 4, thus control three lower brachium pontis device for power switching unlatching or close.In other embodiments, half-bridge driven module 213 also can only connect the device for power switching of three upper brachium pontis, perhaps connects simultaneously whole device for power switching of three-phase brachium pontis.
---decision circuit 214 receives the input of normal low potential source and driven signal, and sends the driving signal to half-bridge driven module 213.Described driven signal refers to be sent and the low pressure side of process inverter 2 and the driving signal after the on high-tension side isolation conversion by the low voltage control system in the low pressure side 22 of inverter 2.When new-energy automobile broke down, because the low pressure side 22 of A-battery 4 and inverter 2 disconnects, thereby described low voltage control system lost power supply, and no longer exports the driven signal.When normal low potential source invalid (when being 0V), directly to the driving signal of half-bridge driven module 213 output high level, the driving signal of this high level makes the three-phase brachium pontis of the high pressure side 21 of inverter 2 enter the three phase short circuit pattern to decision circuit 214.When normal low potential source was effective, decision circuit 214 output is normal to drive the normal operation of three-phase brachium pontis that signal control half-bridge driven module 213 goes to realize the high pressure side 21 of inverter 2.
Above-mentioned realization circuit one is directly to obtain energy from bus capacitor C1, and is independent with the electric machine control system of the low pressure side that is positioned at inverter 2 22 of vehicle.Even normal electric machine control system breaks down, also can guarantee the realization of the described trailer defencive function of the application.
See also Fig. 5, it has provided the realization circuit two of the trailer guard method of the application's new-energy automobile, and it has comprised the whole of realization circuit one shown in Figure 4, and increases to some extent on this basis, and the circuit of increase is used for driving cooling intallation.All in the low pressure side (or the isolated part between high pressure side and the low pressure side) of inverter, it comprises the circuit of described increase:
---isolating transformer 215, be used for according to the linear voltage-stabilizing circuit 211 interim low potential source that generates, by the high pressure side of inverter 2 and the isolation conversion of low pressure side, generate an activation signal in low pressure side 22, with relay 41 closures.Described isolating transformer 215 also can change the optocoupler scheme into or the light relay scheme realizes.
---relay 41 is used for controlling being connected of low pressure side 22 of A-battery 4 and inverter 2.Existing relay 41 is only by the vehicle launch signal closes, and the application then can be closed by one of vehicle launch signal or activation signal with relay 41.When relay 41 closures, low pressure side 22 just can obtain power supply from A-battery 4, and generates normal low potential source.Low voltage control system can obtain power supply, thereby generates the normal signal that drives.This normal low potential source is opened cooling intallation 5 again, is that heat radiation is located in the high pressure side 21 etc. of permagnetic synchronous motor 1, inverter 2 such as opening cooling water pump and cooling fan.Should drive normally the control that signal is also taken over the three phase short circuit pattern of high pressure side 21.Until the rotating speed of permagnetic synchronous motor 1 near 0, just disconnects relay 41, thereby close each cooling intallation, also send and drive signal to withdraw from the three phase short circuit pattern of high pressure side 21.
Be the application's preferred embodiment only below, and be not used in restriction the application.For a person skilled in the art, the application can have various modifications and variations.All within the application's spirit and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the application's the protection domain.
Claims (8)
1. the trailer guard method of a new-energy automobile is characterized in that: when new-energy automobile is towed, open the on high-tension side three phase short circuit pattern of inverter, open simultaneously high pressure side and permagnetic synchronous motor heat radiation that cooling intallation is inverter;
When new-energy automobile stops to tow, close the on high-tension side three phase short circuit pattern of inverter, simultaneously closeall cooling intallation;
The on high-tension side three phase short circuit pattern of described inverter is: the device for power switching of the device for power switching Close All of three upper brachium pontis, while three lower brachium pontis is all opened; Perhaps the device for power switching of three upper brachium pontis all open, the device for power switching Close All of three lower brachium pontis simultaneously.
2. the trailer guard method of new-energy automobile according to claim 1 is characterized in that, described cooling intallation comprises cooling fan, cooling water pump; The high pressure side of inverter and permagnetic synchronous motor or shared cooling intallation perhaps have separately independently cooling intallation.
3. the trailer guard method of new-energy automobile according to claim 1; it is characterized in that; when new-energy automobile breaks down; the high pressure side of high-tension battery and inverter disconnects; also disconnected by relay between the low pressure side of A-battery and inverter, six device for power switching on high-tension side three brachium pontis of inverter all turn-off.
4. the trailer guard method of new-energy automobile according to claim 1, it is characterized in that, when new-energy automobile hinders when being towed for some reason, increased a linear voltage-stabilizing circuit in parallel with bus capacitor newly in the high pressure side, it obtains power supply from bus capacitor, and generates an interim low potential source;
Described interim low potential source accesses the half-bridge driven module in parallel with normal low potential source;
When normal low potential source is effective, directly drive on high-tension side all device for power switching by normal driving signal; When normal low potential source is invalid, open the three phase short circuit pattern by fixing high level signal by the half-bridge driven module.
5. the trailer guard method of new-energy automobile according to claim 1 is characterized in that, described interim low potential source also can generate an activation signal in low pressure side, with relay closes;
Work as relay closes, low pressure side just can obtain power supply from A-battery, starts low voltage control system and generates the normal signal that drives; Should drive normally the signal catcher to the control of on high-tension side three phase short circuit pattern, and open cooling intallation; Until the rotating speed of permagnetic synchronous motor near 0, just disconnects relay, thereby close each cooling intallation, and withdraw from high-tension side three phase short circuit pattern.
6. the realization circuit of the trailer guard method of a new-energy automobile is characterized in that, comprising:
---linear voltage-stabilizing circuit, in parallel with bus capacitor with the acquisition power supply, and generate an interim low potential source;
---circuit parallel receives normal low potential source and inputs independently of each other with interim low potential source, and is the half-bridge driven module for power supply;
---the half-bridge driven module, be subject to the control of the driving signal that decision circuit sends, open or close on high-tension side each device for power switching of inverter;
---decision circuit receives the input of normal low potential source and driven signal, and sends the driving signal to the half-bridge driven module; When normal low potential source is invalid, decision circuit is to the default level signal of half-bridge driven module output; When normal low potential source is effective, the normal signal that drives of decision circuit output.
7. the realization circuit of the trailer guard method of new-energy automobile according to claim 6 is characterized in that, also comprises:
---isolating transformer, it is according to described interim low potential source, at activation signal of low pressure side generation of inverter;
---relay between the low pressure side of A-battery and inverter, is opened and closed by the control of one of vehicle launch signal or described activation signal.
8. the realization circuit of the trailer guard method of new-energy automobile according to claim 7 is characterized in that, described isolating transformer changes optocoupler or light relay into.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210514035.8A CN103042926B (en) | 2012-12-04 | 2012-12-04 | The trailer guard method of new-energy automobile and realize circuit |
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| CN201210514035.8A CN103042926B (en) | 2012-12-04 | 2012-12-04 | The trailer guard method of new-energy automobile and realize circuit |
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| CN103042926B CN103042926B (en) | 2016-09-28 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104553809A (en) * | 2013-10-24 | 2015-04-29 | 联合汽车电子有限公司 | Trailer protection system for hybrid power and pure electric automobile |
| CN104868447A (en) * | 2014-02-24 | 2015-08-26 | 台达电子工业股份有限公司 | Output power supply protector and operation method thereof |
| CN105262059A (en) * | 2015-09-30 | 2016-01-20 | 奇瑞汽车股份有限公司 | Active short-circuit protection circuit of electric automobile |
| CN107031613A (en) * | 2015-09-10 | 2017-08-11 | 丰田自动车株式会社 | Motor vehicle driven by mixed power |
| CN107078681A (en) * | 2014-11-04 | 2017-08-18 | 三菱电机株式会社 | Control device of electric motor, electric power-assisted steering apparatus and fault of dc-to-ac converter system detection method |
| CN107150587A (en) * | 2017-05-04 | 2017-09-12 | 陈明福 | A kind of trailer guard method of new-energy automobile |
| CN112172544A (en) * | 2020-09-25 | 2021-01-05 | 中车永济电机有限公司 | Electric automobile anti-dragging control circuit based on motor controller |
| CN113381633A (en) * | 2020-02-24 | 2021-09-10 | 株洲中车时代电气股份有限公司 | High-voltage electricity taking device for motor controller of electric automobile and motor controller |
| CN114421819A (en) * | 2021-12-17 | 2022-04-29 | 上海金脉电子科技有限公司 | Vehicle-mounted inverter power supply circuit, vehicle-mounted inverter and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107078681A (en) * | 2014-11-04 | 2017-08-18 | 三菱电机株式会社 | Control device of electric motor, electric power-assisted steering apparatus and fault of dc-to-ac converter system detection method |
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| CN107150587A (en) * | 2017-05-04 | 2017-09-12 | 陈明福 | A kind of trailer guard method of new-energy automobile |
| CN113381633A (en) * | 2020-02-24 | 2021-09-10 | 株洲中车时代电气股份有限公司 | High-voltage electricity taking device for motor controller of electric automobile and motor controller |
| CN113381633B (en) * | 2020-02-24 | 2023-09-22 | 株洲中车时代电气股份有限公司 | High-voltage electricity taking device of electric automobile motor controller and motor controller |
| CN112172544A (en) * | 2020-09-25 | 2021-01-05 | 中车永济电机有限公司 | Electric automobile anti-dragging control circuit based on motor controller |
| CN114421819A (en) * | 2021-12-17 | 2022-04-29 | 上海金脉电子科技有限公司 | Vehicle-mounted inverter power supply circuit, vehicle-mounted inverter and vehicle |
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