CN103640489A - Drive device of electric automobile - Google Patents
Drive device of electric automobile Download PDFInfo
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- CN103640489A CN103640489A CN201310697994.2A CN201310697994A CN103640489A CN 103640489 A CN103640489 A CN 103640489A CN 201310697994 A CN201310697994 A CN 201310697994A CN 103640489 A CN103640489 A CN 103640489A
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- inductance
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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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
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Abstract
The invention relates to the technology of electric automobiles, in particular to a drive device of an electric automobile. The drive device of the electric automobile comprises a battery pack, a motor drive circuit and an electric motor, and is characterized by further comprising a Z source converter, wherein the Z source converter is connected with the battery pack and the motor drive circuit respectively; and the motor drive circuit is connected with the electric motor. The drive device of the electric automobile has the benefits as follows: when motor drive adopts full bridge drive, a direct connection state can be allowed; high-magnification buck-boost of a low voltage battery pack can be well realized, and the magnification adjustment range is wide; and when the number of batteries is small, a whole system can be driven, motors with different nominal voltage can be driven in the same battery management system in a wider range, and modular design of the battery management system is facilitated. The drive device of the electric automobile is particularly suitable for the electric automobiles.
Description
Technical field
The present invention relates to electric vehicle engineering, relate to specifically a kind of electric automobile driving apparatus.
Background technology
The Power Drive Unit of electronlmobil is main most crucial part in battery-driven car, and the power system general architecture of traditional electronlmobil is all comprised of power brick, motor-drive circuit and electrical motor three parts, as Fig. 1.And power brick and motor-driven working stability have determined the safety of whole power system, the quantity of power brick battery also affects cost and the performance of car load.Especially, the motor type of using due to each automobile vendor, rated voltage, rating horsepower, peak power always has some differences, this allows the design of electric automobile power battery bag drive system bring inconvenience, each series parallel structure that all needs to redesign according to the parameter of electric machine power brick, and the operation along with electronlmobil, the consumption of the energy content of battery, power brick Voltage-output can reduce, may be lower than the rated voltage of motor, drive motor cannot be operated in rated voltage state, and motor does not move in optimum regime.
Summary of the invention
To be solved by this invention, proposed when number of batteries is less or when power brick global voltage reduces, also can drive a kind of electric automobile driving apparatus of whole system.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of electric automobile driving apparatus, comprise power brick, motor-drive circuit and electrical motor, it is characterized in that, also comprise Z source converter, described Z source converter is connected with motor-drive circuit with power brick respectively, and described motor-drive circuit is connected with electrical motor.
The technical scheme that the present invention is total, by introduce the Z source converter of band output controlled reset in traditional electric automobile driving apparatus, can well avoid the straight-through impact bringing when motor drives as full-bridge, can make power brick carry out boosting of high power, solved traditional not high enough problem of boost converter boost multiple, due to band output feedback, cell power systems is the rated voltage of output motor all the time, guarantees that drive motor is operated in optimal operational condition.With this, realize in the situation that number of batteries is few or when power brick global voltage reduces, can reach motor and drive required load voltage value magnitude of voltage, promoted the performance of car load.
Concrete, described Z source converter is the Z source converter of band output controlled reset, comprise Z source converter module and output feedback control module, described Z source converter module comprises diode, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the first inductance L 1, the second inductance L 2, the 3rd inductance L 3, metal-oxide-semiconductor Q and resistance R L, and described output feedback control module comprises PWM generator and feedback compensation circuit; Wherein,
Diode cathode is connected with the positive pole of power brick, negative pole is connected with one end of the first inductance L 1 with one end of the first capacitor C 1, and the negative pole of power brick is connected with one end of the second capacitor C 2 with one end of the second inductance L 2;
The other end of the first capacitor C 1 is connected with one end of resistance R L with second other end of inductance L 2, one end of the source electrode of metal-oxide-semiconductor, the 3rd electric capacity;
The other end of the first inductance L 1 drains and is connected with one end of the 3rd inductance L 3 with metal-oxide-semiconductor with the other end of the second capacitor C 2, and the grid of metal-oxide-semiconductor connects PWM generator, and the input end of feedback compensation circuit connects the input end of electrical motor, mouth connection PWM generator;
The other end of the 3rd inductance L 3 is connected with the other end of resistance R L with the other end of the 3rd electric capacity.
Beneficial effect of the present invention is to allow to exist straight-through state when motor driving drives for full-bridge.And the high magnification that can well realize A-battery bag boosts, when number of batteries is less, also can drive whole system, the rated voltage of output motor, makes machine operation in optimum regime all the time.And at same battery management system, can be in the driving that realizes in a big way different rated voltage motors.
Accompanying drawing explanation
Fig. 1 is the logic schematic block diagram of traditional electric automobile driving apparatus;
Fig. 2 is the logic schematic block diagram of electric automobile driving apparatus of the present invention;
Fig. 3 is the structural representation of the Z source converter of band output controlled reset;
Fig. 4 is equivalent circuit diagram when Z source converter switch Q is closed in Fig. 3;
Fig. 5 is equivalent circuit diagram when Z source converter switch Q opens in Fig. 3;
Fig. 6 is that in Fig. 3, Z source converter module is VIN=20V in parameter, L1=L2=33uH, L3=1000uH, C1=C2=22uF, C3=1000uF, the circuit simulation schematic diagram in Matlab during RL=50 Ω.
The specific embodiment
Below in conjunction with accompanying drawing, describe technical scheme of the present invention in detail:
Device of the present invention mainly comprises power brick, motor-drive circuit, electrical motor and comprises that the Z source converter of band output controlled reset forms, the Z source converter of described band output controlled reset is connected with motor-drive circuit with power brick respectively, and described motor-drive circuit is connected with electrical motor.Wherein, the Z source converter of output controlled reset comprises Z source converter module and output feedback control loop module.
As shown in Figure 3, the Z source converter of band output controlled reset comprises Z source converter module and output feedback control module, described Z source converter module comprises diode, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the first inductance L 1, the second inductance L 2, the 3rd inductance L 3, metal-oxide-semiconductor Q and resistance R L, and described output feedback control module comprises PWM generator and feedback compensation circuit; Wherein,
Diode cathode is connected with the positive pole of power brick, negative pole is connected with one end of the first inductance L 1 with one end of the first capacitor C 1, and the negative pole of power brick is connected with one end of the second capacitor C 2 with one end of the second inductance L 2;
The other end of the first capacitor C 1 is connected with one end of resistance R L with second other end of inductance L 2, one end of the source electrode of metal-oxide-semiconductor, the 3rd electric capacity;
The other end of the first inductance L 1 drains and is connected with one end of the 3rd inductance L 3 with metal-oxide-semiconductor with the other end of the second capacitor C 2, and the grid of metal-oxide-semiconductor connects PWM generator, and the input end of feedback compensation circuit connects the input end of electrical motor, mouth connection PWM generator;
The other end of the 3rd inductance L 3 is connected with the other end of resistance R L with the other end of the 3rd electric capacity.
Principle of work of the present invention is:
When the required rated voltage of output voltage voltage out of reach motor, system will make rated voltage and current output voltage values Vo poor, then pass through feedback compensation module, finally pass through PWM generator, again the PWM that upgrades system drives signal, the system output clock of making reaches the required rated operational voltage of motor, guarantees that motor is in best mode of operation.
Especially, the principle of work of the Z source converter module in system is as follows:
When switch MOS pipe is closed, diode bears back-pressure, and now as shown in Figure 4, Z source network is straight-through for circuit equivalent, filter inductance L3 voltage reversal, and load R1 is powered by output capacitance C3 and filter inductance L3; When switch MOS pipe is opened, as shown in Figure 5, now power supply is given the charging of Z source network to equivalent circuit on the one hand, also to load, provides energy.We get input power VIN=20V, L1=L2=33uH, L3=1000uH, C1=C2=22uF, C3=1000uF, RL=50 Ω, through Matlab emulation, by Fig. 6, we can find out that output voltage is VOUT=102.5V, have realized the step-up ratio that surpasses 5 times, this in the circuit of common boost, be do not allow facile.Can be so that batteries of electric automobile bag only needs lower Voltage-output, by outputing to motor-drive circuit after the conversion of Z source, just can reach the rated voltage of electrical motor, and Z source network step-up ratio can regulate by switch conduction ratio, thereby can give by the power brick of same voltage swing the electrical motor power supply of different rated voltages, and facilitate the modularization of BMS system.
Claims (2)
1. an electric automobile driving apparatus, comprises power brick, motor-drive circuit and electrical motor, it is characterized in that, also comprises Z source converter, and described Z source converter is connected with motor-drive circuit with power brick respectively, and described motor-drive circuit is connected with electrical motor.
2. a kind of electric automobile driving apparatus according to claim 1, it is characterized in that, described Z source converter is the Z source converter of band output controlled reset, comprise Z source converter module and output feedback control module, described Z source converter module comprises diode, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the first inductance L 1, the second inductance L 2, the 3rd inductance L 3, metal-oxide-semiconductor Q and resistance R L, and described output feedback control module comprises PWM generator and feedback compensation circuit; Wherein,
Diode cathode is connected with the positive pole of power brick, negative pole is connected with one end of the first inductance L 1 with one end of the first capacitor C 1, and the negative pole of power brick is connected with one end of the second capacitor C 2 with one end of the second inductance L 2;
The other end of the first capacitor C 1 is connected with one end of resistance R L with second other end of inductance L 2, one end of the source electrode of metal-oxide-semiconductor, the 3rd electric capacity;
The other end of the first inductance L 1 drains and is connected with one end of the 3rd inductance L 3 with metal-oxide-semiconductor with the other end of the second capacitor C 2, and the grid of metal-oxide-semiconductor connects PWM generator, and the input end of feedback compensation circuit connects the input end of electrical motor, mouth connection PWM generator;
The other end of the 3rd inductance L 3 is connected with the other end of resistance R L with the other end of the 3rd electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310697994.2A CN103640489A (en) | 2013-12-18 | 2013-12-18 | Drive device of electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310697994.2A CN103640489A (en) | 2013-12-18 | 2013-12-18 | Drive device of electric automobile |
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| CN103640489A true CN103640489A (en) | 2014-03-19 |
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| CN201310697994.2A Pending CN103640489A (en) | 2013-12-18 | 2013-12-18 | Drive device of electric automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283487A (en) * | 2014-10-28 | 2015-01-14 | 重庆邮电大学 | Novel electric vehicle driving system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030107352A1 (en) * | 2001-12-06 | 2003-06-12 | Downer Scott D. | Electrical motor power management system |
| CN101645615A (en) * | 2009-09-08 | 2010-02-10 | 国网电力科学研究院武汉南瑞有限责任公司 | Wind and solar hybrid generating system based on Z source |
| CN102882361A (en) * | 2012-09-25 | 2013-01-16 | 山东达能科技有限公司 | Method for eliminating harmonic wave in Z-source alternating current (AC)/AC converter by using pulse-width modulation (PWM) |
| CN103042944A (en) * | 2012-12-15 | 2013-04-17 | 安徽工程大学 | Electric automobile driver |
| CN103427730A (en) * | 2012-06-19 | 2013-12-04 | 上海理工大学 | Permanent magnet brushless direct current motor torque ripple suppression system and method |
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2013
- 2013-12-18 CN CN201310697994.2A patent/CN103640489A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030107352A1 (en) * | 2001-12-06 | 2003-06-12 | Downer Scott D. | Electrical motor power management system |
| CN101645615A (en) * | 2009-09-08 | 2010-02-10 | 国网电力科学研究院武汉南瑞有限责任公司 | Wind and solar hybrid generating system based on Z source |
| CN103427730A (en) * | 2012-06-19 | 2013-12-04 | 上海理工大学 | Permanent magnet brushless direct current motor torque ripple suppression system and method |
| CN102882361A (en) * | 2012-09-25 | 2013-01-16 | 山东达能科技有限公司 | Method for eliminating harmonic wave in Z-source alternating current (AC)/AC converter by using pulse-width modulation (PWM) |
| CN103042944A (en) * | 2012-12-15 | 2013-04-17 | 安徽工程大学 | Electric automobile driver |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283487A (en) * | 2014-10-28 | 2015-01-14 | 重庆邮电大学 | Novel electric vehicle driving system |
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Application publication date: 20140319 |