CN113690995B - Motor energy conversion charging device, method and system of new energy electric automobile - Google Patents
Motor energy conversion charging device, method and system of new energy electric automobile Download PDFInfo
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- CN113690995B CN113690995B CN202110872606.4A CN202110872606A CN113690995B CN 113690995 B CN113690995 B CN 113690995B CN 202110872606 A CN202110872606 A CN 202110872606A CN 113690995 B CN113690995 B CN 113690995B
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 39
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
- B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1807—Rotary generators
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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
- H02M3/156—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 with automatic control of output voltage or current, e.g. switching regulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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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
- Y02T10/64—Electric machine technologies in electromobility
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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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for 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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention belongs to the technical field of new energy electric vehicles, and discloses a device, a method and a system for converting and charging motor energy of a new energy electric vehicle, wherein the system for converting and charging motor energy of the new energy electric vehicle comprises the following components: a driving device, a mechanical connecting device and an in-vehicle charging device; the driving device comprises a frequency converter and an asynchronous motor; the mechanical connecting device comprises an asynchronous motor rotating shaft, an automobile hub, a coupler, a transmission shaft, a speed reducer and other mechanical devices, wherein the transmission shaft and the speed reducer are arranged in the automobile; the in-vehicle charging device comprises a permanent magnet motor, a permanent magnet motor controller and a storage battery. The invention provides a motor energy conversion charging system of a new energy electric automobile, which has the advantages of short charging time, low manufacturing cost and high safety and reliability. The invention reduces the cost, has simpler external mechanical connection, matures the control of the asynchronous motor, does not need to additionally increase devices such as a converter and the like, and is safer and more reliable than a charging pile.
Description
Technical Field
The invention belongs to the technical field of new energy electric vehicles, and particularly relates to a motor energy conversion charging device, method and system of a new energy electric vehicle.
Background
At present, the development and popularization of automobiles greatly facilitate the travel of people and change the life style of people. But at the same time, a series of problems such as environmental pollution, energy exhaustion and the like are caused. In order to effectively relieve the environmental and energy pressure, the national continuous outgoing policy in recent years promotes the transformation and upgrading of the automobile industry, and greatly promotes the application of new energy automobiles with low pollution and zero emission. However, the problem of electric energy supplement becomes one of the important factors restricting the further popularization of new energy automobiles.
The main charging modes in the market at present are three types, and certain advantages and disadvantages exist respectively. The first mode is alternating current charging, namely, the direct utilization of 50HZ power frequency single-phase or three-phase alternating current is connected to a vehicle-mounted charger through a charging device and a charger, the direct current is converted into direct current with proper voltage through the vehicle-mounted charger, and the direct current is used for charging a power battery, wherein the rated capacity of the direct current is generally 2.2kW (220 va,10 a), 3.3kW (220 va,16 a), 6.6kW (220 va,32 a), 22.4kW (380 va,63 a) and the like. The mode can directly use household power supply for charging, so that the method is simple and convenient, but has the defects of smaller current and power and longer charging time, and takes a 3.3kW charging pile as an example, and generally more than 8 hours are needed. The second mode is direct current charging, and 380V three-phase alternating current is converted into high-voltage direct current through a power module inside a charging pile to directly supply power to a vehicle-mounted battery, and the general output voltage is 200V-750V. The method can output larger current and power (which can be more than 120 kW), so the charging time is short. However, the charging pile has a large potential safety hazard due to a high voltage, and needs continuous maintenance in a later period. The third mode is wireless charging, mainly comprises an inductive coupling type and a magnetic induction resonance type, and the power supply coil is buried in underground concrete, so that the wireless charging device has the advantages of small occupied area, convenience in use and the like. But are also difficult to apply on a large scale due to some technical difficulties and high costs.
Through the above analysis, the problems and defects existing in the prior art are as follows: the current and the power of the existing new energy electric car charging device are smaller, the charging time is longer, the potential safety hazard is larger, and the cost is higher.
The difficulty of solving the problems and the defects is as follows:
in order to increase the charging power and shorten the charging time, the cost is increased and the safety problem is caused.
The meaning of solving the problems and the defects is as follows:
the charging time is reduced as much as possible while the charging power is ensured, and the reliability and the safety are high. Provides a new way for charging the electric automobile.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a motor energy conversion charging device, method and system for a new energy electric automobile.
The invention is realized in such a way that a new energy electric automobile's motor energy conversion charging system includes:
a driving device, a mechanical connecting device and an in-vehicle charging device;
the driving device comprises a frequency converter and an asynchronous motor;
the mechanical connecting device comprises an asynchronous motor rotating shaft, an automobile hub, a coupler, a transmission shaft, a speed reducer and other mechanical devices, wherein the transmission shaft and the speed reducer are arranged in the automobile;
the in-vehicle charging device comprises a permanent magnet motor, a permanent magnet motor controller and a storage battery.
Further, the driving device includes:
one end of the frequency converter is connected with a power grid, the other end of the frequency converter is connected with the asynchronous motor,
the frequency converter is used for supplying power to the asynchronous motor and adjusting output power and rotating speed.
Further, the mechanical connection device comprises:
one end of the coupler is fixed with a rotating shaft of the asynchronous motor, and the other end of the coupler is assembled to the center of the hub of the driving wheel;
the speed reducer is connected with the transmission shaft and the permanent magnet motor and is used for providing a fixed speed reduction ratio for the rotation speed of the permanent magnet motor and the rotation speed of the wheels.
Further, the fixed reduction ratio is 3-10.
Further, the in-vehicle charging device includes:
the permanent magnet motor is used for outputting electric energy;
the permanent magnet motor controller can operate in four quadrants and is used for converting three-phase high-voltage alternating current generated by the permanent magnet motor into high-voltage direct current to charge the storage battery.
Another object of the present invention is to provide a method for converting and charging motor energy of a new energy electric vehicle based on the system for converting and charging motor energy of a new energy electric vehicle, the method for converting and charging motor energy of a new energy electric vehicle comprising:
step one, a frequency converter connected with a power grid is utilized to supply power to an asynchronous motor, and output power and rotation speed are regulated;
step two, the asynchronous motor rotates to drive wheels to synchronously rotate, and a mechanical transmission device arranged in the automobile is utilized to drive the permanent magnet motor to generate electricity;
and thirdly, converting alternating current generated by the permanent magnet motor into high-voltage direct current through a power converter in the automobile to charge a storage battery.
Further, the converting the alternating current generated by the permanent magnet motor into high-voltage direct current by the power converter inside the automobile to charge the storage battery comprises the following steps:
and rectifying three-phase voltage generated by the permanent magnet motor through an AC/DC converter, and then reducing the voltage through a bidirectional DC/DC converter to charge the storage battery.
Further, the motor energy conversion charging method of the new energy electric automobile further comprises the following steps: when the electric automobile is in an electric state, the storage battery is boosted through the bidirectional DC/DC converter circuit, and then the storage battery is subjected to direct current to alternating current conversion through the DC/AC inverter to provide three-phase alternating current for the permanent magnet motor.
Another object of the present invention is to provide a motor energy conversion charging system based on the new energy electric vehicle based on the motor energy conversion charging method of the new energy electric vehicle, the motor energy conversion charging system based on the new energy electric vehicle comprising:
the power supply conversion module is used for connecting an external network power supply to the asynchronous motor;
the driving module is used for driving the automobile hub to rotate by utilizing the asynchronous motor and simultaneously driving the permanent magnet motor to generate electricity when the wheels rotate by utilizing a mechanical transmission device arranged in the automobile;
the charging/reverse charging module is used for converting the current generated by the permanent magnet motor by utilizing the AC/DC inverter and the bidirectional DC/DC converter circuit and then inputting the converted current into the storage battery, or performing reverse work to convert direct current into alternating current and provide three-phase alternating current for the permanent magnet motor through the storage battery;
the display module is used for displaying the rotating speed and the charging quantity of the asynchronous motor; meanwhile, the device is used for carrying out full-charge prompt when the storage battery is full;
and the power supply cutting module is used for cutting off the power supply of the asynchronous motor when the battery is full.
Another object of the present invention is to provide a new energy electric vehicle on which the motor energy conversion charging device of the new energy electric vehicle is mounted.
By combining all the technical schemes, the invention has the advantages and positive effects that: the invention provides a motor energy conversion charging system of a new energy electric automobile, which has the advantages of short charging time, low manufacturing cost and high safety and reliability.
The invention converts the electric energy input by the power grid into mechanical energy, then outputs the electric energy to charge the battery through the permanent magnet motor in the electric automobile and the automobile motor controller, can control the rotating speed and the output power of the asynchronous motor to control the charging speed, and utilizes the converter in the automobile to output 600V to 1500V direct current, thus the charging time is greatly shortened compared with an alternating current charging mode. And secondly, the invention maximally utilizes the internal devices and power electronic devices of the electric automobile, reduces the cost, has simpler external mechanical connection, is mature in control of the asynchronous motor, does not need to additionally increase devices such as a converter, and is safer and more reliable than a charging pile.
Drawings
Fig. 1 is a schematic diagram of a motor energy conversion charging system of a new energy electric vehicle according to an embodiment of the present invention;
in the figure: 1. a power grid; 2. a frequency converter; 3. an asynchronous motor; 4. a coupling; 5. a hub; 6. an axle; 7. a speed reducer; 8. a permanent magnet motor; 9. a current transformer; 10. and a storage battery.
Fig. 2 is a flowchart of a method for converting and charging motor energy of a new energy electric vehicle according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a motor energy conversion charging system of the new energy electric vehicle according to the embodiment of the invention;
in the figure: 11. a power conversion module; 12. a driving module; 13. a charging/reverse charging module; 14. a display module; 15. and a power supply cut-off module.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Aiming at the problems existing in the prior art, the invention provides a motor energy conversion charging system of a new energy electric automobile, and the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the motor energy conversion charging system of the new energy electric automobile provided by the embodiment of the invention comprises a driving device, a mechanical connecting device and an in-automobile charging device;
the driving device provided by the embodiment of the invention consists of a frequency converter 2 and an asynchronous motor 3, the mechanical connecting device consists of a rotating shaft of the asynchronous motor, an automobile hub 5, a coupler 4, an axle 6, a speed reducer 7 and other mechanical devices, and the in-vehicle charging device consists of a permanent magnet motor 8, a current converter 9 and a storage battery 10.
One end of a frequency converter 2 provided by the embodiment of the invention is connected with a power grid 1, the other end of the frequency converter 2 is connected with an asynchronous motor 3, and the frequency converter is used for supplying power to the asynchronous motor 3 and simultaneously adjusting output power and rotating speed.
One end of a coupler 4 provided by the embodiment of the invention is used for fixing the rotating shaft of an asynchronous motor 3, and the other end of the coupler 4 is assembled to the center of a driving wheel hub 5;
the speed reducer 7 is connected with the axle 6 and the permanent magnet motor 8 and is used for providing a fixed speed reduction ratio for the rotation speed of the permanent magnet motor and the rotation speed of wheels.
The permanent magnet motor 8 provided by the embodiment of the invention is used for outputting electric energy; the converter 9 can operate in four quadrants and is used for converting three-phase high-voltage alternating current generated by the permanent magnet motor into high-voltage direct current to charge the storage battery.
As shown in fig. 2, the method for converting and charging motor energy of the new energy electric vehicle provided by the embodiment of the invention includes:
s101, supplying power to an asynchronous motor by using a frequency converter connected with a power grid, and regulating output power and rotating speed;
s102, an asynchronous motor rotates to drive wheels to synchronously rotate, and a mechanical transmission device arranged in an automobile is utilized to drive a permanent magnet motor to generate power;
s103, converting alternating current generated by the permanent magnet motor into high-voltage direct current through a power converter in the automobile to charge a storage battery.
The method for converting the alternating current generated by the permanent magnet motor into the high-voltage direct current through the power converter in the automobile to charge the storage battery comprises the following steps:
and rectifying three-phase voltage generated by the permanent magnet motor through an AC/DC converter, and then reducing the voltage through a bidirectional DC/DC converter to charge the storage battery.
The energy conversion charging method of the new energy electric automobile provided by the embodiment of the invention further comprises the following steps: when the electric automobile is in an electric state, the storage battery is boosted through the bidirectional DC/DC converter circuit, and then the storage battery is subjected to direct current to alternating current conversion through the DC/AC inverter to provide three-phase alternating current for the permanent magnet motor.
As shown in fig. 3, the motor energy conversion charging system based on the new energy electric vehicle provided by the embodiment of the invention includes:
the power supply conversion module 11 is used for connecting an external network power supply to the asynchronous motor;
the driving module 12 is used for driving the automobile hub to rotate by using an asynchronous motor and simultaneously driving the permanent magnet motor to generate electricity when the wheels rotate by using a mechanical transmission device arranged in the automobile;
the charging/reverse charging module 13 is used for converting the current generated by the permanent magnet motor by utilizing the AC/DC inverter and the bidirectional DC/DC converter circuit and then inputting the converted current into the storage battery, or converting direct current into alternating current by reverse work and providing three-phase alternating current for the permanent magnet motor through the storage battery;
the display module 14 is used for displaying the rotating speed and the charging quantity of the asynchronous motor; meanwhile, the device is used for carrying out full-charge prompt when the storage battery is full;
the power cut-off module 15 is used for cutting off the power supply of the asynchronous motor when the battery is full.
The technical scheme of the invention is further described below with reference to specific embodiments.
Example 1:
the driving device provided by the embodiment of the invention comprises an asynchronous motor and a frequency converter, wherein the frequency converter is directly connected with a power grid, the frequency converter supplies power to the asynchronous motor, the output power and the rotating speed are regulated, the capacity of the driving device is 60-200kVA, and the rotating speed change range of the motor is 0-4000r/min.
The mechanical connecting device provided by the embodiment of the invention comprises two parts, wherein the first part comprises an asynchronous motor rotating shaft, a coupler and an automobile hub, and the asynchronous motor rotating shaft is connected with the automobile hub through the coupler so as to ensure that the asynchronous motor can drive the automobile hub to synchronously rotate. The second part comprises mechanical devices such as an internal transmission shaft of the automobile, a speed reducer and the like, so that the rotation of the automobile hub can be transmitted to the permanent magnet motor, the speed reducer can provide a fixed reduction ratio (3-10) between the permanent magnet motor and wheels, and higher rotation speed can be obtained through the speed reducer permanent magnet motor.
The in-vehicle charging device provided by the embodiment of the invention comprises a permanent magnet motor with the power of (15-200 kW), the rotating speed change range of (0-14000 r/min), a permanent magnet motor controller with the capacity of (15-200 kVA) and a storage battery (15-90 kWh). The electric automobile motor converter is a bidirectional DC/DC converter, and when the electric automobile is in an electric state, the vehicle-mounted storage battery is boosted through the bidirectional DC/DC converter circuit and then is subjected to direct current to alternating current conversion through the DC/AC inverter to provide three-phase alternating current for the permanent magnet motor. When in a regenerative braking state, the motor is in a generator state, the generated three-phase voltage is rectified by the AC/DC converter and then reduced by the bidirectional DC/DC converter to charge the battery, and the charging system of the invention works in the state. The converter can work bidirectionally and can output 600V to 1500V direct current.
Example 2:
the driving device is powered by a 1-power grid for a 2-frequency converter, the power grid outputs three-phase 380V 50HZ voltage for supplying power for the frequency converter, the capacity of the frequency converter is 60kVA, the 3-asynchronous motor is used as a driving motor, 8 poles are added, and rated power is 60kW. The speed is regulated by frequency conversion, and the rotating speed range is 0-4000r/min. The rated rotation speed is 3000r/min.
The mechanical device connects the asynchronous motor rotating shaft with the 5-wheel hub through the 4-coupling. The automobile driving wheel is arranged on the free roller, the rotating shaft of the asynchronous motor and the wheel of the electric automobile synchronously rotate, the diameter of the wheel is 18 inches (45.72 cm), and when the asynchronous motor works at the rated rotating speed, the rotating speed of the wheel is kept consistent with that of the motor and is 3000r/min. I.e. 71.8km/h. The wheel rotates to drive the 6-axle to rotate, and the rotating speed is transmitted to the 8-permanent magnet motor through the 7-speed reducer. For an electric automobile with a reduction ratio of 3.1/1, the rotating speed of the permanent magnet motor is 9300r/min. The mechanical device efficiency was about 95%.
The charging device in the vehicle comprises an 8-permanent magnet motor with rated power of 30kW, and the 9-converter consists of a DC/DC direct current booster circuit and a DC/AC inverter circuit and can work bidirectionally. The capacity is 60kVA, the rotating shaft is driven to rotate through the rotation of the asynchronous motor, the input power of the asynchronous motor is 30kW, the input torque is 95.5Nm, the loss is ignored, the rotating speed of the permanent magnet motor is 9300r/min, the torque is 30.8Nm, the output current is 37.1A, and the output voltage is 860V. The generated alternating current is converted into high-voltage direct current through a power converter, and the high-voltage direct current is reduced in voltage through a DC/DC circuit to charge a storage battery. The charging device efficiency is about 95%. The overall efficiency of the energy conversion charging system can reach 90%.
The technical scheme of the invention is further described below in connection with the working principle.
The invention uses the asynchronous motor powered by the frequency converter as a driving device, the asynchronous motor is directly connected with the automobile driving wheel through a coupling, the asynchronous motor drives the automobile driving wheel rotating shaft to rotate, the permanent magnet motor in the automobile is driven by the internal transmission device of the electric automobile to serve as a generator to output electric energy, and the generated three-phase high-voltage alternating current is converted into high-voltage direct current through the automobile motor controller capable of four-quadrant operation, so as to charge the automobile battery.
The electric vehicle drive wheel rests on the free drum so that the vehicle remains stationary while charging. The asynchronous motor is powered by an external frequency converter and controls the rotating speed, the asynchronous motor is connected with the hub of the automobile driving wheel through a coupler, one end of the coupler is fixed with the rotating shaft of the asynchronous motor, and the other end of the coupler is assembled to the center of the hub. When the asynchronous motor rotates, the driving shaft of the automobile is driven to synchronously rotate, the permanent magnet motor is driven to rotate through the speed reducer by the mechanical transmission device in the automobile, at the moment, the permanent magnet motor is in a power generation working mode, the permanent magnet on the rotor rotates to generate a rotating magnetic field to cut the stator winding to generate induced electromotive force, the mechanical energy is converted into electric energy, and the generated three-phase alternating current is rectified into high-voltage direct current through the power converter to supply power for the storage battery. In addition, the rotating speed of the asynchronous motor can be detected and displayed to a user through a rotating speed sensor, and the output power of the motor can be converted into the charging electric quantity to be displayed outwards, and when the battery is full, the charging electric quantity is prompted, and meanwhile, the power supply of the asynchronous motor is cut off.
Demonstration section (specific examples/experiments/simulations/pharmacological analysis/front experimental data which can prove the inventive aspects of the present invention, etc.)
In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It should be noted that the embodiments of the present invention can be realized in hardware, software, or a combination of software and hardware. The hardware portion may be implemented using dedicated logic; the software portions may be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or special purpose design hardware. Those of ordinary skill in the art will appreciate that the apparatus and methods described above may be implemented using computer executable instructions and/or embodied in processor control code, such as provided on a carrier medium such as a magnetic disk, CD or DVD-ROM, a programmable memory such as read only memory (firmware), or a data carrier such as an optical or electronic signal carrier. The device of the present invention and its modules may be implemented by hardware circuitry, such as very large scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, etc., or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., as well as software executed by various types of processors, or by a combination of the above hardware circuitry and software, such as firmware.
The foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the invention is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention will be apparent to those skilled in the art within the scope of the present invention.
Claims (8)
1. The utility model provides a new forms of energy electric automobile's motor energy conversion charging device which characterized in that, new forms of energy electric automobile's motor energy conversion charging device includes:
a driving device, a mechanical connecting device and an in-vehicle charging device;
the driving device comprises a frequency converter and an asynchronous motor;
the mechanical connecting device comprises an asynchronous motor rotating shaft, an automobile hub, a coupler, a transmission shaft, a speed reducer and other mechanical devices, wherein the transmission shaft and the speed reducer are arranged in the automobile;
the in-vehicle charging device comprises a permanent magnet motor, a permanent magnet motor controller and a storage battery;
the driving device includes:
one end of the frequency converter is connected with a power grid, the other end of the frequency converter is connected with the asynchronous motor,
the frequency converter is used for supplying power to the asynchronous motor and adjusting output power and rotating speed;
the mechanical connection device comprises:
one end of the coupler is fixed with a rotating shaft of the asynchronous motor, and the other end of the coupler is assembled to the center of the hub of the driving wheel;
the speed reducer is connected with the transmission shaft and the permanent magnet motor and is used for providing a fixed speed reduction ratio for the rotation speeds of the permanent magnet motor and the wheels;
an asynchronous motor powered by a frequency converter is used as a driving device, the asynchronous motor is directly connected with an automobile driving wheel through a coupling, the asynchronous motor drives a rotating shaft of the automobile driving wheel to rotate, a permanent magnet motor in an electric automobile is driven by an internal transmission device of the electric automobile to serve as a generator to output electric energy, and a motor controller capable of four-quadrant operation is used for converting generated three-phase high-voltage alternating current into high-voltage direct current to charge an automobile battery;
the driving wheel of the electric automobile is stopped on the free roller so that the automobile is kept stationary during charging; the asynchronous motor is powered by an external frequency converter and controls the rotating speed, the asynchronous motor is connected with the hub of the automobile driving wheel through a coupler, one end of the coupler is fixed with a rotating shaft of the asynchronous motor, and the other end of the coupler is assembled at the center of the hub; when the asynchronous motor rotates, the driving shaft of the automobile is driven to synchronously rotate, the permanent magnet motor is driven to rotate through the speed reducer by a mechanical transmission device in the automobile, at the moment, the permanent magnet motor is in a power generation working mode, a permanent magnet on a rotor rotates to generate a rotating magnetic field to cut a stator winding to generate induced electromotive force, mechanical energy is converted into electric energy, and the generated three-phase alternating current is rectified into high-voltage direct current through a power converter to supply power for a storage battery; in addition, the rotating speed of the asynchronous motor can be detected and displayed to a user through a rotating speed sensor, and the output power of the motor can be converted into the charging electric quantity to be displayed outwards, and when the battery is full, the charging electric quantity is prompted, and meanwhile, the power supply of the asynchronous motor is cut off.
2. The electric motor energy conversion charging apparatus of new energy electric vehicle as claimed in claim 1, wherein the fixed reduction ratio is 3-10.
3. The motor-generator charging device for a new-energy electric vehicle according to claim 1, wherein the in-vehicle-generator charging device comprises:
the permanent magnet motor is used for outputting electric energy;
the permanent magnet motor controller can operate in four quadrants and is used for converting three-phase high-voltage alternating current generated by the permanent magnet motor into high-voltage direct current to charge the storage battery.
4. A motor energy conversion charging method of a new energy electric vehicle based on the motor energy conversion charging device of the new energy electric vehicle according to any one of claims 1 to 3, characterized in that the motor energy conversion charging method of the new energy electric vehicle comprises:
step one, a frequency converter connected with a power grid is utilized to supply power to an asynchronous motor, and output power and rotation speed are regulated;
step two, the asynchronous motor rotates to drive wheels to synchronously rotate, and a mechanical transmission device arranged in the automobile is utilized to drive the permanent magnet motor to generate electricity;
and thirdly, converting alternating current generated by the permanent magnet motor into high-voltage direct current through a power converter in the automobile to charge a storage battery.
5. The method for converting and charging motor energy of new electric automobile according to claim 4, wherein converting ac power generated by permanent magnet motor into high voltage dc power by power converter inside automobile comprises charging accumulator:
and rectifying three-phase voltage generated by the permanent magnet motor through an AC/DC converter, and then reducing the voltage through a bidirectional DC/DC converter to charge the storage battery.
6. The method for charging a new electric vehicle by motor energy conversion according to claim 4, further comprising: when the electric automobile is in an electric state, the storage battery is boosted through the bidirectional DC/DC converter circuit, and then the storage battery is subjected to direct current to alternating current conversion through the DC/AC inverter to provide three-phase alternating current for the permanent magnet motor.
7. A motor-energy conversion charging system based on the new-energy electric vehicle, which implements the motor-energy conversion charging method based on the new-energy electric vehicle according to any one of claims 4 to 6, characterized in that the motor-energy conversion charging system based on the new-energy electric vehicle includes:
the power supply conversion module is used for connecting an external network power supply to the asynchronous motor;
the driving module is used for driving the automobile hub to rotate by utilizing the asynchronous motor and simultaneously driving the permanent magnet motor to generate electricity when the wheels rotate by utilizing a mechanical transmission device arranged in the automobile;
the charging/reverse charging module is used for converting the current generated by the permanent magnet motor by utilizing the AC/DC inverter and the bidirectional DC/DC converter circuit and then inputting the converted current into the storage battery, or performing reverse work to convert direct current into alternating current and provide three-phase alternating current for the permanent magnet motor through the storage battery;
the display module is used for displaying the rotating speed and the charging quantity of the asynchronous motor; meanwhile, the device is used for carrying out full-charge prompt when the storage battery is full;
and the power supply cutting module is used for cutting off the power supply of the asynchronous motor when the battery is full.
8. A new energy electric vehicle, wherein the new energy electric vehicle is equipped with the motor energy conversion charging device of the new energy electric vehicle according to any one of claims 1 to 3.
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| CN1958329A (en) * | 2005-11-06 | 2007-05-09 | 万德鸿 | Wheel hub drive apparatus of hybrid electrical vehicle(HEV) |
| CN102653240A (en) * | 2012-04-23 | 2012-09-05 | 华中科技大学 | Electromobile hybrid battery-driven system |
| CN107351692A (en) * | 2016-06-08 | 2017-11-17 | 成都雅格隆电动汽车有限公司 | A kind of electric automobile electric power system and method for supplying power to |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1958329A (en) * | 2005-11-06 | 2007-05-09 | 万德鸿 | Wheel hub drive apparatus of hybrid electrical vehicle(HEV) |
| CN102653240A (en) * | 2012-04-23 | 2012-09-05 | 华中科技大学 | Electromobile hybrid battery-driven system |
| CN107351692A (en) * | 2016-06-08 | 2017-11-17 | 成都雅格隆电动汽车有限公司 | A kind of electric automobile electric power system and method for supplying power to |
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