CN108001292B - Electric system of pure electric vehicle with mixed high-voltage direct current and high-frequency alternating current - Google Patents
Electric system of pure electric vehicle with mixed high-voltage direct current and high-frequency alternating current Download PDFInfo
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- CN108001292B CN108001292B CN201810017331.4A CN201810017331A CN108001292B CN 108001292 B CN108001292 B CN 108001292B CN 201810017331 A CN201810017331 A CN 201810017331A CN 108001292 B CN108001292 B CN 108001292B
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- voltage direct
- frequency
- zone
- current bus
- auxiliary equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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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 pure electric vehicle electric system for mixing high-voltage direct current and high-frequency alternating current, which comprises four areas and two distribution buses, wherein the four areas are respectively a high-voltage direct current bus and a high-frequency alternating current bus, the four areas are formed by dividing other parts of the pure electric vehicle except a power battery pack according to space positions, and are respectively a left front area, a left rear area, a right front area and a right rear area, and each area comprises a frequency converter, a hub motor, a high-frequency inverter and an auxiliary equipment assembly; the high-voltage direct-current bus is directly connected with the output of the power battery pack, on one hand, the high-voltage direct-current bus is connected with the frequency converter of each zone to supply power to the corresponding hub motor, on the other hand, the high-frequency inverter of each zone is connected with the auxiliary equipment assembly of each zone to supply power to the auxiliary equipment assembly of each zone, the output of the high-frequency inverter of each zone is connected with the corresponding auxiliary equipment assembly through the high-frequency alternating-current bus, and the high-frequency inverters of the four zones are connected in parallel. The invention has the advantages of simplifying the system structure, enhancing the system compatibility and the like.
Description
Technical Field
The invention relates to the technical field of pure electric vehicles, in particular to a pure electric vehicle electrical system which mixes High-voltage dc (HVDC) with High-frequency ac (HFAC).
Background
The existing electric system of the pure electric vehicle is mainly a double-direct-current power distribution system with high voltage of 100-400V/low voltage of 14V, and a high-voltage bus obtains energy from a power battery pack, so that on one hand, a motor load is driven through a frequency converter, and on the other hand, a low-voltage direct-current bus is generated through a dc-dc converter, and further power is supplied to vehicle-mounted auxiliary equipment. The low-voltage 14V direct current power distribution mode is basically inherited in the traditional automobile electrical system, and along with the continuous improvement of the diversification degree of the vehicle-mounted equipment, the power grade of the automobile electrical system is continuously improved, so that the transmission wire harness is increased, and the weight and the cost of the automobile are improved; in addition, the transmission mode of low-voltage large current has the defect of low efficiency and the like. In order to solve the problems, a DC 42V automobile electrical system appears, but is not popularized temporarily because of the fact that the DC 42V automobile electrical system is not compatible with 14V vehicle-mounted equipment; meanwhile, the 42V direct current electrical system also has the problems of poor safety, serious corrosion of electric arcs and wire harness connectors and the like.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, provides a pure electric vehicle electrical system for mixing high-voltage direct current (HVDC) and high-frequency alternating current (HFAC), introduces an HFAC power distribution system into the field of pure electric vehicles, overcomes the shortcomings of the existing high-voltage 100-400V/low-voltage 14V double-direct current electrical system, and has good compatibility for 14/42V vehicle-mounted electrical equipment.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows: the electric system of the pure electric vehicle for mixing high-voltage direct current and high-frequency alternating current comprises four areas and two power distribution buses, wherein the four areas are respectively a high-voltage direct current bus and a high-frequency alternating current bus, other parts of the pure electric vehicle except a power battery pack are divided into a left front area, a left rear area, a right front area and a right rear area according to space positions, and each area comprises a frequency converter, a hub motor, a high-frequency inverter and an auxiliary equipment assembly; the high-voltage direct-current bus is directly connected with the output of the power battery pack, on one hand, the high-voltage direct-current bus is connected with the frequency converter of each zone to supply power to the corresponding hub motor, on the other hand, the high-voltage direct-current bus is connected with the auxiliary equipment assembly of each zone to supply power to the auxiliary equipment assembly of each zone, the output of the high-voltage direct-current inverter of each zone is connected with the corresponding auxiliary equipment assembly through the high-frequency alternating-current bus, and the high-frequency inverters of the four zones are connected in parallel.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the electric system of the pure electric vehicle is simplified, the number of transmission harnesses and the weight of the whole vehicle are reduced, and the cost is reduced.
2. HFAC transmission may be combined with power line carrier communication techniques to further simplify the onboard electrical system.
3. The HFAC bus supplies power to the vehicle-mounted auxiliary equipment assembly, can be compatible with 14/42V equipment, and is easy to popularize.
4. Each area is independently distributed, so that the area autonomy based on the space position is easy to realize, and the reliability can be enhanced.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Detailed Description
The invention will be further illustrated with reference to specific examples.
As shown in fig. 1, the electric system of the hybrid high-voltage direct current (HVDC) and high-frequency alternating current (HFAC) provided in the present embodiment includes four zones and two distribution buses, which are respectively a high-voltage direct current (HVDC) bus 22 and a high-frequency alternating current (HFAC) bus 23, wherein the four zones are formed by dividing other parts of the pure electric vehicle except for a power battery pack 1 according to space positions, and are respectively a left front zone 2, a left rear zone 3, a right front zone 4 and a right rear zone 5; the left front area 2 comprises a frequency converter 6, a left front hub motor 7, a high-frequency inverter 8 and a left front area auxiliary equipment assembly 9; the left rear area 3 comprises a frequency converter 10, a left rear hub motor 11, a high-frequency inverter 12 and a left rear area auxiliary equipment assembly 13; the right front area 4 comprises a frequency converter 14, a right front hub motor 15, a high-frequency inverter 16 and a right front area auxiliary equipment assembly 17; the right rear area 5 comprises a frequency converter 18, a right rear hub motor 19, a high-frequency inverter 20 and a right rear area auxiliary equipment assembly 21; the high-voltage direct current bus 22 is directly powered by the power battery pack 1, on one hand, the frequency converters 6, 10, 14 and 18 connected with each zone respectively supply power to the left front wheel hub motor 7, the left rear wheel hub motor 11, the right front wheel hub motor 15 and the right rear wheel hub motor 19, on the other hand, the high-frequency inverters 8, 12, 16 and 20 connected with each zone respectively supply power to the left front zone auxiliary equipment assembly 9, the left rear zone auxiliary equipment assembly 13, the right front zone auxiliary equipment assembly 17 and the right rear zone auxiliary equipment assembly 21, and the high-voltage direct current bus is compatible with 14/42V equipment, the outputs of the high-frequency inverters 8, 12, 16 and 20 of each zone are connected with the corresponding auxiliary equipment assemblies through the high-frequency alternating current bus 23, and the high-frequency inverters 8, 12, 16 and 20 of the four zones are connected in parallel, so that reactive power and harmonic waves of each zone can be effectively controlled.
In summary, the system divides other parts of the pure electric vehicle except the power battery pack into four areas according to the space positions, the HVDC bus is connected with the frequency converter of each area to supply power to the corresponding hub motor, and simultaneously, the high-frequency inverter of each area generates HFAC to supply power to the corresponding auxiliary equipment assembly. Compared with the existing double direct current electric system of the pure electric vehicle, the system has the advantages of simplifying the system structure, enhancing the system compatibility and the like, has practical popularization value and is worthy of popularization.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, so variations in shape and principles of the present invention should be covered.
Claims (1)
1. A pure electric vehicle electrical system mixing high-voltage direct current and high-frequency alternating current is characterized in that: the power distribution system comprises four areas and two power distribution buses, wherein the four areas are respectively a high-voltage direct-current bus and a high-frequency alternating-current bus, the four areas are formed by dividing other parts of the pure electric vehicle except a power battery pack according to space positions, the four areas are respectively a left front area, a left rear area, a right front area and a right rear area, and each area comprises a frequency converter, a hub motor, a high-frequency inverter and an auxiliary equipment assembly; the high-voltage direct-current bus is directly connected with the output of the power battery pack, on one hand, the high-voltage direct-current bus is connected with the frequency converter of each zone to supply power to the corresponding hub motor, on the other hand, the high-voltage direct-current bus is connected with the auxiliary equipment assembly of each zone to supply power to the auxiliary equipment assembly of each zone, the output of the high-voltage direct-current inverter of each zone is connected with the corresponding auxiliary equipment assembly through the high-frequency alternating-current bus, and the high-frequency inverters of the four zones are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810017331.4A CN108001292B (en) | 2018-01-09 | 2018-01-09 | Electric system of pure electric vehicle with mixed high-voltage direct current and high-frequency alternating current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810017331.4A CN108001292B (en) | 2018-01-09 | 2018-01-09 | Electric system of pure electric vehicle with mixed high-voltage direct current and high-frequency alternating current |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108001292A CN108001292A (en) | 2018-05-08 |
| CN108001292B true CN108001292B (en) | 2023-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810017331.4A Active CN108001292B (en) | 2018-01-09 | 2018-01-09 | Electric system of pure electric vehicle with mixed high-voltage direct current and high-frequency alternating current |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113002455A (en) * | 2021-03-22 | 2021-06-22 | 华南理工大学 | Direct current and high frequency alternating current hybrid electric system for unmanned vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104494464A (en) * | 2014-12-25 | 2015-04-08 | 西安交通大学 | Multi-motor coordination controller for distributed driving electric automobile |
| CN105291842A (en) * | 2015-11-27 | 2016-02-03 | 华南理工大学 | Distributed high-frequency alternating-current electrical system for electric car |
| CN106218439A (en) * | 2016-09-14 | 2016-12-14 | 浙江吉利控股集团有限公司 | A kind of vehicle distributed energy dynamical system and control method thereof |
| CN106467111A (en) * | 2015-08-20 | 2017-03-01 | 比亚迪股份有限公司 | Vehicle body stable control method, system and automobile |
| CN207825999U (en) * | 2018-01-09 | 2018-09-07 | 华南理工大学 | A kind of electrical system for pure electric vehicle of mixed high-voltage direct current and high-frequency ac |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8648559B2 (en) * | 2011-03-16 | 2014-02-11 | Deere & Company | System for controlling rotary electric machines to reduce current ripple on a direct current bus |
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- 2018-01-09 CN CN201810017331.4A patent/CN108001292B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104494464A (en) * | 2014-12-25 | 2015-04-08 | 西安交通大学 | Multi-motor coordination controller for distributed driving electric automobile |
| CN106467111A (en) * | 2015-08-20 | 2017-03-01 | 比亚迪股份有限公司 | Vehicle body stable control method, system and automobile |
| CN105291842A (en) * | 2015-11-27 | 2016-02-03 | 华南理工大学 | Distributed high-frequency alternating-current electrical system for electric car |
| CN106218439A (en) * | 2016-09-14 | 2016-12-14 | 浙江吉利控股集团有限公司 | A kind of vehicle distributed energy dynamical system and control method thereof |
| CN207825999U (en) * | 2018-01-09 | 2018-09-07 | 华南理工大学 | A kind of electrical system for pure electric vehicle of mixed high-voltage direct current and high-frequency ac |
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| CN108001292A (en) | 2018-05-08 |
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