CN2750947Y - Power unit used for electric vehicle - Google Patents
Power unit used for electric vehicle Download PDFInfo
- Publication number
- CN2750947Y CN2750947Y CN 200420092529 CN200420092529U CN2750947Y CN 2750947 Y CN2750947 Y CN 2750947Y CN 200420092529 CN200420092529 CN 200420092529 CN 200420092529 U CN200420092529 U CN 200420092529U CN 2750947 Y CN2750947 Y CN 2750947Y
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- direct current
- drive motor
- voltage
- electrical generator
- loop
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Abstract
The utility model discloses a power unit for electric vehicles, which comprises a voltage-boosting type DC to DC conversion circuit (2), a voltage-reducing type DC to DC conversion circuit (3), a drive motor (10) and a control circuit (4) thereof, wherein an output end of the voltage-boosting type DC to DC conversion circuit (2) is connected with an input end of the voltage-reducing type DC to DC conversion circuit (3) and an input end of the drive motor control circuit (4) through DC buses (6), an input end of the voltage-boosting type DC to DC conversion circuit (2) is connected to an output end of the voltage-reducing type DC to DC conversion circuit (3) through a low-voltage power battery pack (1), and the drive motor control loop (4) is connected with the drive motor (10). Since the number of batteries for use is small, the problem of unbalanced and inconsistent batteries caused by using a high-voltage battery pack is avoided, and simultaneously the problems that the electric vehicles use air-conditioners in summer and the electric vehicles can only be used for short distance driving are solved.
Description
Technical field
The utility model relates to engine installation, relates in particular to a kind of electric vehicle engine installation.
Background technology
Various pure electronic and electronic sample cars of mixed type are all arranged at present at trail run at home and abroad, but all be difficult to form industrialization production, major cause is to have some problems that are difficult to overcome.
Require to go up from electric vehicle performance, compare with traditional DC speed regulation driving, the AC frequency conversion drive system has bigger advantage.Because the cost performance of electronic component, the ac variable frequency speed regulation drive system requires a higher terminal voltage, and the voltage of general direct-flow input end promptly needs 20～30 12 volts battery series connection between 240～380 volts, on the angle of safety, need to increase the high-voltage safety protection cost; On the angle of safeguarding, need professional service personnel, increased maintenance cost.
Because tens batteries are cascaded, bring difficulty for the harmony of battery.In theory, in the life-span of whole battery group, depend on the battery that quality is the poorest.In order to improve the service life of battery, the method for solution has two, or improves the battery production technological level, reaches the height conformability; Increase the battery balanced management system of a cover.No matter adopt which kind of method, all will improve the manufacturing cost of battery-driven car greatly, make battery-driven car be difficult to popularize.Under the prerequisite that guarantees the capacity that power battery pack is identical, the number that battery uses is many more in addition, and battery pack bonded assembly work capacity is just big more, and shared onboard space is also big more.
The terminal voltage of power battery pack is high more, and is just high more to the requirement of battery, as the requirement of battery sealing-performance.Can be used for the battery that battery-driven car is popularized at present, no matter from cost performance, or on the security standpoint, lead-acid battery has very strong competitive power.For safety, countries in the world are adopted colloid battery mostly, and its cost performance is far away from the plumbic acid maintenance-free battery, but its incompatibility high-pressure system if conductive liquid is excessive, can cause the problem of personal safety.
Though plumbic acid pure electric sedan, once charging can guarantee 80～100 kilometers travelled distance basically, this is enough to satisfy city demand on and off duty, but, it can't satisfy the idle call energy requirement in summer, simultaneously also can't satisfy the requirement that the long mileage that goes out of the city travels, this has also influenced popularizing of battery-driven car greatly.
Summary of the invention
The purpose of this utility model provides and a kind ofly can guarantee pure electronic continual mileage, and over-the-road expense is few, and has the electric vehicle engine installation of environment protection significance.
The utility model comprises boost type DC direct current conversion loop 2, buck direct current direct current conversion loop 3, drive motor control loop 4, drive motor 10; The mouth in described boost type DC direct current conversion loop 2 by dc bus 6, is connected with the input end in buck direct current direct current conversion loop 3, the input end of drive motor control loop 4; The input end in boost type DC direct current conversion loop 2 is connected by low-voltage-powered battery pack 1 with the mouth in buck direct current direct current conversion loop 3; Drive motor control loop 4 is connected with drive motor 10.
The utility model can also comprise electrical generator control loop 5, electrical generator 9, driving engine 12, the mouth of electrical generator control loop 5 is connected by the mouth of dc bus 6 with described boost type DC direct current conversion loop 2, the input end of electrical generator control loop 5 is connected with the mouth of electrical generator 9, and driving engine 12 is connected with electrical generator 9 by driving device 22.
Described drive motor 10 and electrical generator 9 all are three phase AC induction machines.
Advantage of the present utility model is:
(1) can overcome the shortcoming that tens battery series connection are brought, for example adopt low-voltage-powered battery pack, promptly voltage is no more than 100 volts, only needs 8 lead-acid battery series connection.
(2) can satisfy the needs of turning on the aircondition in the car, only need to use the very little driving engine of discharge capacity of comparing with car load to get final product.For example gross weight is 1200 kilograms a car, and using discharge capacity is 160 milliliters of driving engines, also has redundant power, in air conditioner refrigerating, the power of driving engine redundancy can be used to generating, according to the running state of vehicle, can pass through reduction voltage loop, charge the battery; Can also directly supply with and drive the loop as the part energy, make the operating range of vehicle increase greatly.
(3) can satisfy the needs that the long mileage that goes out of the city travels, one 1200 kilograms battery-driven car for example, the driving engine that discharge capacity is 160 milliliters just can satisfy its average 80 kilometers/hour speed per hour power substantially, so only need disconnect the air-conditioning load, just can satisfy long mileage and travel.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure: 3 drive motor control loops, 4 electrical generator control loops, 5 dc buss, 6 electrical generators, 9 drive motor, 10 driving systems, 11 driving engines, 12 magnetic clutchs, 13 air-conditioning compressors, 14 commutating circuits, 17 drivings device 22 of 2 buck direct current direct currents conversion loop, low-voltage-powered battery pack 1 boost type DC direct current conversion loop
The specific embodiment
As shown in Figure 1, the utility model comprises boost type DC direct current conversion loop 2, buck direct current direct current conversion loop 3, drive motor control loop 4, drive motor 10; The mouth in described boost type DC direct current conversion loop 2 by dc bus 6, is connected with the input end in buck direct current direct current conversion loop 3, the input end of drive motor control loop 4; The input end in boost type DC direct current conversion loop 2 is connected by low-voltage-powered battery pack 1 with the mouth in buck direct current direct current conversion loop 3; Drive motor control loop 4 is connected with drive motor 10.
The utility model can also comprise electrical generator control loop 5, electrical generator 9, driving engine 12, the mouth of electrical generator control loop 5 is connected by the mouth of dc bus 6 with described boost type DC direct current conversion loop 2, the input end of electrical generator control loop 5 is connected with the mouth of electrical generator 9, and driving engine 12 is connected with electrical generator 9 by driving device 22.
Described drive motor 10 and electrical generator 9 all are three phase AC induction machines.
The utility model divides three kinds of state operations:
1. pure motorized motions state
The boosted formula direct current of the voltage of low-voltage-powered battery pack 1 direct current conversion loop 2 rises to high pressure, the high voltage electric energy of this moment offers drive motor control loop 4, drive motor control loop 4 is converted to the frequency-changing AC electricity with HVDC and inputs to drive motor 10, travels by driving system 11 powered vehicle.
When feedback is returned in brake, the energy that returns feedback from drive motor 10 to drive motor control loop 4, by 4 rectifications of drive motor control loop and offer buck direct current direct current conversion loop 3, by buck direct current direct current conversion loop 3 this is returned feed again and can offer low-voltage-powered battery pack 1 again.
Comprehensively above-mentioned, just can obtain the battery pack of low pressure, high-voltage AC frequency conversion drive system.In addition, return the feedback function, only need add a commutating circuit 17 in addition, just can make onboard charger and use owing to have brake.
2. be with the battery-driven car state of operation of air conditioner
Because air-conditioning is not annual required, can use driving engine 12 to drive air-conditioning compressor 14 operations, for the efficient that improves driving engine 12, driving engine 12 is operated in the optimal economic district, utilize electrical generator 9, under the control of electrical generator control loop 5, according to the load state of driving engine 12, regulate the size of electric energy generated.
Electric energy for redundancy, by electrical generator control loop 5 alternating current is converted into direct current (DC), according to running state of the vehicle, this redundant electric energy, via drive motor control loop 4 and drive motor 10, input to drive system, or give low-voltage-powered battery pack 1 charging via buck direct current direct current conversion loop 3.
Under the state of opening driving engine 12 and air-conditioning compressor 14, the travelled distance of battery-driven car will increase.
3. motoring condition goes out of the city
Going out of the city travels requires the speed height, and mileage is far away.Magnetic clutch on the air-conditioning compressor 14 13 is disconnected, with the mechanical energy of driving engine 12, by electrical generator 9 and electrical generator control loop 5, be converted into electric energy and be added in the drive system, driving power will increase greatly this moment, thereby the difficulty of running at high speed solves.
Though driving engine 12 can not provide enough accelerating powers,, the power that it provides can make battery-driven car keep a higher at the uniform velocity moving velocity, and whole accelerating power is provided by driving engine 12 and boost type DC direct current conversion loop 2.
Claims (4)
1. an electric vehicle engine installation is characterized in that, comprises boost type DC direct current conversion loop (2), buck direct current direct current conversion loop (3), drive motor control loop (4), drive motor (10); The mouth in described boost type DC direct current conversion loop (2) by dc bus (6), is connected with the input end in buck direct current direct current conversion loop (3), the input end of drive motor control loop (4); The input end in boost type DC direct current conversion loop (2) is connected by low-voltage-powered battery pack (1) with the mouth in buck direct current direct current conversion loop (3); Drive motor control loop (4) is connected with drive motor (10).
2. electric vehicle engine installation according to claim 1, it is characterized in that, also comprise electrical generator control loop (5), electrical generator (9), driving engine (12), the mouth of electrical generator control loop (5) is connected by the mouth of dc bus (6) with described boost type DC direct current conversion loop (2), the input end of electrical generator control loop (5) is connected with the mouth of electrical generator (9), and driving engine (12) is connected with electrical generator (9) by driving device (22).
3. electric vehicle engine installation according to claim 1 is characterized in that, drive motor (10) is a three phase AC induction machine.
4. electric vehicle engine installation according to claim 2 is characterized in that, electrical generator (9) is a three phase AC induction machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420092529 CN2750947Y (en) | 2004-09-16 | 2004-09-16 | Power unit used for electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420092529 CN2750947Y (en) | 2004-09-16 | 2004-09-16 | Power unit used for electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2750947Y true CN2750947Y (en) | 2006-01-11 |
Family
ID=35932126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420092529 Expired - Fee Related CN2750947Y (en) | 2004-09-16 | 2004-09-16 | Power unit used for electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2750947Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109703386A (en) * | 2019-01-25 | 2019-05-03 | 哈尔滨理工大学 | Low-pressure type stroke-increasing electric automobile distance increasing unit control system and energy management method |
-
2004
- 2004-09-16 CN CN 200420092529 patent/CN2750947Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109703386A (en) * | 2019-01-25 | 2019-05-03 | 哈尔滨理工大学 | Low-pressure type stroke-increasing electric automobile distance increasing unit control system and energy management method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |