CN110492623B - Wireless power transmission inverter power supply based on direct control AC-AC converter - Google Patents
Wireless power transmission inverter power supply based on direct control AC-AC converter Download PDFInfo
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- CN110492623B CN110492623B CN201810462682.6A CN201810462682A CN110492623B CN 110492623 B CN110492623 B CN 110492623B CN 201810462682 A CN201810462682 A CN 201810462682A CN 110492623 B CN110492623 B CN 110492623B
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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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal 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
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal 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
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal 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 in a bridge configuration
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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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Inverter Devices (AREA)
Abstract
The invention provides a wireless power transmission inverter power supply based on a direct control AC-AC converter, and belongs to the technical field of wireless power transmission of electric automobiles. The invention comprises a system consisting of a full-bridge chopper circuit, a chopper output acquisition circuit, an FPGA data processing circuit and an FPGA output control circuit; the external port is reserved for single-phase power frequency access and the static input end of the wireless power transmission coupling mechanism to be connected out, and 20kHz power output required by wireless charging of the electric automobile is provided. The wireless power transmission inverter power supply has the characteristics of high efficiency, high stability, small size and the like.
Description
Technical Field
The invention relates to a wireless power transmission inverter power supply based on a direct control AC-AC converter, and belongs to the technical field of wireless power transmission of electric automobiles.
Background
Two major bottleneck problems exist in the current electric automobile development: one is the battery problem on the vehicle-from the recent technical point of view, there are many aspects problems such as volume, weight, price, material, safety, charging speed, life-span, etc., in addition the production of the battery and recycling process used belong to the process of high pollution, consuming resources, destroying the ecological environment, these characteristics bring difficulty to the industrialization of the electric vehicle; on the other hand, the problem of charging infrastructure on the ground is that due to the limitation of battery material characteristics (electric energy density, power density and the like), the battery has long charging time and short endurance mileage, needs a large amount of charging or battery replacement facilities with high frequency, brings great difficulty to municipal construction, and the facilities need to occupy a large amount of ground area, are not beneficial to unified management and have high operation and maintenance cost. And also brings great inconvenience to the vehicle user.
Disclosure of Invention
The invention aims to solve the problems of large electric energy loss, large volume and poor stability of the conventional inverter power supply system with high-frequency power transmission, provides a wireless electric energy transmission inverter power supply based on a direct control AC-AC converter, is mainly applied to a wireless electric energy transmission system of a household small electric automobile, and is used for transmitting power to a primary coil for energy transmission by converting the power frequency into the high-frequency electric energy, namely the wireless electric energy transmission inverter power supply in the 20kHz electric energy form required by a coupling mechanism at a transmitting end.
The invention comprises a system consisting of a full-bridge chopper circuit, a chopper output acquisition circuit, an FPGA data processing circuit and an FPGA output control circuit; the external port is reserved for single-phase power frequency access and the static input end of the wireless power transmission coupling mechanism to be connected out, and 20kHz power output required by wireless charging of the electric automobile is provided. The technical scheme is as follows:
a wireless power transmission inverter power supply based on a direct control AC-AC converter comprises a full-bridge chopper circuit 1, a transmitting end coupling mechanism 2, a receiving end coupling mechanism 3, a rectifying circuit 4, an output acquisition circuit 5, an output acquisition signal AD conversion circuit 6 and an FPGA logic controller 7; the AC electric energy signal input end of the full-bridge chopper circuit 1 is connected with the AC electric energy signal end; the 20kHz AC electric energy signal output end of the full-bridge chopper circuit 1 is connected with the electric energy signal input end of the transmitting end coupling mechanism 2; the coupling end of the transmitting end coupling mechanism 2 is coupled and inductively connected with the coupling end of the receiving end coupling mechanism 3; the electric energy signal output end of the receiving end coupling mechanism 3 is connected with the electric energy signal input end of the rectifying circuit 4; the electric energy output end of the rectification circuit 4 is the direct current electric energy output end of the wireless electric energy transmission inverter power supply; the 20kHz AC power signal output end of the full-bridge chopper circuit 1 is connected with the acquisition signal input end of the output acquisition circuit 5; the acquisition signal output end of the output acquisition circuit 5 is connected with the conversion signal input end of the output acquisition signal AD conversion circuit 6; the conversion signal output end of the output acquisition signal AD conversion circuit 6 is connected with the output signal acquisition data input end of the FPGA logic controller 7; and the control signal output end of the FPGA logic controller 7 is connected with the control signal input end of the full-bridge chopper circuit 1.
Further, the full-bridge chopper circuit 1 comprises four IGBTs, the four IGBTs are connected in series in the same direction and then connected in parallel to be input, and CE public ends are connected with output respectively to be connected.
Further, the full-bridge chopper circuit 1 comprises four MOSFET switching tubes, the four MOSFET switching tubes are connected in series in the same direction in pairs and then connected in parallel to be input, and the CE public end is connected with the output respectively to be connected.
Further, the processing procedure of the FPGA logic controller 7 is as follows:
the method comprises the following steps: controlling the wireless power transmission inverter power supply system to be in soft start, and presetting a control initial value;
step two: the FPGA logic controller 7 judges the working state of a primary system of the inverter power supply, wherein the working state of the primary system comprises working and standby;
step three: when the FPGA logic controller 7 judges that the working state of the inverter power supply is working, the FPGA logic controller 7 enters a PI correction link, and the PI correction link processes the acquired signal received by the FPGA logic controller 7 through a PI set value to obtain a control signal output quantity; the control signal output quantity carries out the working state judgment of the primary system in the second step again; when the FPGA logic controller 7 judges that the working state of the inverter power supply is standby, the FPGA logic controller 7 judges the working state of a secondary system of the inverter power supply, wherein the working state of the secondary system comprises working and shutdown.
Step four: after the working state of the secondary system is judged, when the inverter power supply works, the FPGA logic controller 7 obtains the working signal, and carries out the working state judgment of the primary system in the second step on the working signal again, and repeats the contents from the second step to the third step; and after the working state of the secondary system is judged, when the inverter power supply is in a shutdown state, the FPGA logic controller 7 cuts off a power supply loop and ends the logic control process.
The invention has the beneficial effects that:
1. the inverter power supply is different from the traditional inverter power supply which usually adopts an AC-DC and DC-AC two-stage structure, but directly converts power frequency into an electric energy form required by a wireless electric energy transmission transmitting end, and reduces a one-stage converter on the premise of ensuring the electric energy transmission requirement, thereby not only reducing the energy loss by 5-10 percent, but also improving the system efficiency by 5-10 percent; meanwhile, the front-end redundant mechanism is reduced, the size and the cost are greatly reduced, spare parts and storage redundancy are saved, and even a user can maintain and replace the modularized product by himself.
2. In the traditional power frequency current transformation two-stage structure, the system can not work normally and stably due to the fact that a switch is not timely in high-frequency high-power rectification, so that the traditional power frequency two-stage structure is not suitable for high-frequency high-power controllable rectification, namely the traditional power frequency two-stage structure can not work normally under the high-frequency high-power environment. The inverter power supply is controlled by PI based on FPGA, has high response speed and good control effect, can stably work under the working conditions of high frequency and low ripple waves required by static wireless power supply, greatly improves the stability of normal work of a common inverter device in high-frequency high-power rectification, and improves the power stability by 10-40 percent compared with the traditional two-stage structure.
3. The inverter power supply adopts a programmable logic device, applies a simple and effective control flow, and can achieve the effect of primary side control (wireless power transmitting end) of constant current output under the conditions of no load and load of a secondary side (electric vehicle receiving end) aiming at wireless power transmission LCC and LCL topologies. Without complex optimization, communication and control at the secondary side (electric vehicle receiving end).
4. The coupling end of the transmitting end coupling mechanism 2 and the receiving end coupling mechanism 3 adopt an LC resonance topology which has the characteristic of low ripple, so that the inverter power supply can omit a filter circuit at the rear stage of an AC-AC converter for wireless charging of an electric automobile, and the structure greatly reduces the system efficiency reduction and the generated large amount of heat caused by the characteristic of high voltage and current of a main loop and the addition of an additional energy storage element of a power supply system, thereby improving the system efficiency and omitting a heat dissipation device at the rear end. The overall system efficiency of the inverter power supply is improved by 1-3%, and the heat is reduced by 1-3%. Meanwhile, the inverter power coupling of the invention avoids the problems of insecurity and instability caused by the generation of a large amount of heat to a great extent. The safety and the stability of the power supply system are effectively improved, the miniaturization of the power supply system is realized, and the improvement not only reduces the cost, but also improves the reliability of the system.
Drawings
Fig. 1 is a block diagram of the overall structure of the inverter power supply of the present invention.
Fig. 2 is a block diagram of the control process of the inverter according to the present invention.
Fig. 3 is a flow chart of the FPGA control of the inverter power supply according to the present invention.
Fig. 4 is a diagram of the states (gray on, black off) and currents of the switching tube of the inverter according to the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples, but the present invention is not limited to these examples.
Example 1:
the system comprises a full-bridge chopper circuit, a chopper output acquisition circuit, an FPGA data processing circuit and an FPGA output control circuit; the external port is reserved for single-phase power frequency access and the static input end of the wireless power transmission coupling mechanism to be connected out, and 20kHz power output required by wireless charging of the electric automobile is provided. The technical scheme is as follows:
a wireless power transmission inverter power supply based on a direct control AC-AC converter adopts a wireless power transmission LC resonance topological structure for inversion. The power supply comprises a full-bridge chopper circuit 1, a transmitting end coupling mechanism 2, a receiving end coupling mechanism 3, a rectifying circuit 4, an output acquisition circuit 5, an output acquisition signal AD conversion circuit 6 and an FPGA logic controller 7; the AC electric energy signal input end of the full-bridge chopper circuit 1 is connected with the AC electric energy signal end; the 20kHz AC electric energy signal output end of the full-bridge chopper circuit 1 is connected with the electric energy signal input end of the transmitting end coupling mechanism 2; the coupling end of the transmitting end coupling mechanism 2 is coupled and inductively connected with the coupling end of the receiving end coupling mechanism 3; the electric energy signal output end of the receiving end coupling mechanism 3 is connected with the electric energy signal input end of the rectifying circuit 4; the electric energy output end of the rectification circuit 4 is the direct current electric energy output end of the wireless electric energy transmission inverter power supply; the 20kHz AC power signal output end of the full-bridge chopper circuit 1 is connected with the acquisition signal input end of the output acquisition circuit 5; the acquisition signal output end of the output acquisition circuit 5 is connected with the conversion signal input end of the output acquisition signal AD conversion circuit 6; the conversion signal output end of the output acquisition signal AD conversion circuit 6 is connected with the output signal acquisition data input end of the FPGA logic controller 7; and the control signal output end of the FPGA logic controller 7 is connected with the control signal input end of the full-bridge chopper circuit 1. The full-bridge chopper circuit 1 comprises four IGBT or four MOSFET switching tubes, the four IGBT or MOSFET switching tubes are connected in series in the same direction in pairs and then connected in parallel to be input, and CE public ends are connected with output respectively to be connected.
The output acquisition circuit 5 comprises a current and voltage direct acquisition circuit, and the acquisition of current and voltage signals is realized by mutual inductor or Hall element acquisition and other acquisition modes of electrical parameters capable of extracting frequency information.
The wireless power transmission inverter power supply directly controlling the AC-AC converter can realize the conversion of commercial power to 20kHz or 85kHz power. The inverter source is reserved, and only by changing the preset parameters of the FPGA and the types (power levels) of related signals and power elements, the inverter source is converted into an electric energy conversion mode of SAE J2954 standard, general requirement suggestion letter of an electric vehicle wireless charging system, other characteristic frequency (such as 85kHz) and corresponding output power (3.3kW, 6.6kW, 11kW, 22kW and the like) of the wireless charging electric vehicle.
The processing process of the FPGA logic controller 7 is as follows:
the method comprises the following steps: controlling the wireless power transmission inverter power supply system to be in soft start, and presetting a control initial value;
step two: the FPGA logic controller 7 judges the working state of a primary system of the inverter power supply, wherein the working state of the primary system comprises working and standby;
step three: when the FPGA logic controller 7 judges that the working state of the inverter power supply is working, the FPGA logic controller 7 enters a PI correction link, and the PI correction link processes the acquired signal received by the FPGA logic controller 7 through a PI set value to obtain a control signal output quantity; the control signal output quantity carries out the working state judgment of the primary system in the second step again; when the FPGA logic controller 7 judges that the working state of the inverter power supply is standby, the FPGA logic controller 7 judges the working state of a secondary system of the inverter power supply, wherein the working state of the secondary system comprises working and shutdown.
Step four: after the working state of the secondary system is judged, when the inverter power supply works, the FPGA logic controller 7 obtains the working signal, and carries out the working state judgment of the primary system in the second step on the working signal again, and repeats the contents from the second step to the third step; and after the working state of the secondary system is judged, when the inverter power supply is in a shutdown state, the FPGA logic controller 7 cuts off a power supply loop and ends the logic control process. Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
The working principle of the power supply system in this embodiment is as follows:
the power frequency electric energy is input and converted into alternating current with required frequency (20kHz) through the AC-AC conversion circuit of the inverter, so that the wireless electric energy transmission transmitting end generates resonance. The transmitting guide rail and the receiving end transmit electric energy through magnetic field coupling. Received alternating current is converted into direct current through bridge rectification and is transmitted to an energy storage and driving element of the electric automobile, wireless electric energy transmission of the electric automobile is achieved, and a circuit topological structure is shown in figure 1.
Based on the invention: the basic principle is that output signals are collected by a Hall element and are sent to an FPGA (an FPGA control flow chart is shown in figure 3) through high-speed AD conversion, the FPGA decides and outputs a switch tube control signal through PI control, the switch tube is directly controlled to act, power frequency electric energy is directly chopped, and the power frequency electric energy is converted into 20kHz electric energy and is supplied to a wireless electric energy transmission coupling mechanism.
The output is sampled, AD converted, logic processed, the signal is output, and the switching tube forms closed-loop control (see figure 2, system control flow chart). The high-frequency pulse controls the opening and closing state, frequency and time of the switch tube. The open and close states of different switch tubes correspond to the current state of the circuit, as shown in fig. 4, the switch tubes alternately switch at high speed to continuously change the current direction, so that the electric energy is converted into a high-frequency form.
Claims (3)
1. A wireless power transmission inverter power supply based on a direct control AC-AC converter is characterized by comprising a full-bridge chopper circuit (1), a transmitting end coupling mechanism (2), a receiving end coupling mechanism (3), a rectifying circuit (4), an output acquisition circuit (5), an output acquisition signal AD conversion circuit (6) and an FPGA logic controller (7); the AC electric energy signal input end of the full-bridge chopper circuit (1) is connected with the AC electric energy signal end; the 20kHz AC electric energy signal output end of the full-bridge chopper circuit (1) is connected with the electric energy signal input end of the transmitting end coupling mechanism (2); the coupling end of the transmitting end coupling mechanism (2) is coupled and inductively connected with the coupling end of the receiving end coupling mechanism (3); the electric energy signal output end of the receiving end coupling mechanism (3) is connected with the electric energy signal input end of the rectifying circuit (4); the electric energy output end of the rectifying circuit (4) is the direct current electric energy output end of the wireless electric energy transmission inverter power supply; the 20kHz AC electric energy signal output end of the full-bridge chopper circuit (1) is connected with the acquisition signal input end of the output acquisition circuit (5); the acquisition signal output end of the output acquisition circuit (5) is connected with the conversion signal input end of the output acquisition signal AD conversion circuit (6); the conversion signal output end of the output acquisition signal AD conversion circuit (6) is connected with the output signal acquisition data input end of the FPGA logic controller (7); the control signal output end of the FPGA logic controller (7) is connected with the control signal input end of the full-bridge chopper circuit (1);
the processing process of the FPGA logic controller (7) is as follows:
the method comprises the following steps: controlling the wireless power transmission inverter power supply system to be in soft start, and presetting a control initial value;
step two: the FPGA logic controller (7) judges the working state of a primary system of the inverter power supply, wherein the working state of the primary system comprises working and standby;
step three: when the FPGA logic controller (7) judges that the working state of the inverter power supply is working, the FPGA logic controller (7) enters a PI correction link, and the PI correction link processes the acquired signal received by the FPGA logic controller (7) through a PI set value to obtain a control signal output quantity; the control signal output quantity carries out the working state judgment of the primary system in the second step again; when the FPGA logic controller (7) judges that the working state of the inverter power supply is standby, the FPGA logic controller (7) judges the working state of a secondary system of the inverter power supply, wherein the working state of the secondary system comprises working and shutdown;
step four: after the working state of the secondary system is judged, when the state of the inverter power supply is working, the FPGA logic controller (7) obtains the working signal, and carries out the working state judgment of the primary system in the second step on the working signal again, and repeats the contents from the second step to the third step; and when the working state of the secondary system is judged and the inverter power supply is in a shutdown state, the FPGA logic controller (7) cuts off a power supply loop and ends the logic control process.
2. The wireless power transmission inverter power supply according to claim 1, wherein the full-bridge chopper circuit (1) comprises four IGBTs, the four IGBTs are connected in series in the same direction and then connected in parallel with an input end, and a CE common end is connected with an output end respectively.
3. The wireless power transmission inverter power supply according to claim 1, wherein the full-bridge chopper circuit (1) comprises four MOSFET switching tubes, the four MOSFET switching tubes are connected in series in the same direction in pairs and then connected in parallel with an input end, and a CE common end is connected with an output end respectively.
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| CN113922679A (en) * | 2020-07-10 | 2022-01-11 | Oppo广东移动通信有限公司 | Power adapter |
| CN113937911B (en) * | 2021-10-22 | 2023-04-04 | 湘潭大学 | Double-emission wireless power transmission device |
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