CN115091978A - High-power wireless transmission device and method for electric automobile - Google Patents
High-power wireless transmission device and method for electric automobile Download PDFInfo
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- CN115091978A CN115091978A CN202210914829.7A CN202210914829A CN115091978A CN 115091978 A CN115091978 A CN 115091978A CN 202210914829 A CN202210914829 A CN 202210914829A CN 115091978 A CN115091978 A CN 115091978A
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- 238000004804 winding Methods 0.000 description 7
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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
- B60L53/10—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 the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
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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
- B60L53/10—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 the energy transfer between the charging station and the vehicle
- B60L53/12—Inductive energy transfer
- B60L53/122—Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
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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
- B60L53/30—Constructional details of charging stations
- B60L53/34—Plug-like or socket-like devices specially adapted for contactless inductive charging of electric vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/46—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having three operative positions, e.g. off/star/delta
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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
- H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a high-power wireless transmission device and a high-power wireless transmission method for an electric automobile, and belongs to the field of wireless power supply. The energy receiving device comprises an energy receiving device and an energy transmitting device, wherein the energy transmitting device comprises a transmitting coil, the transmitting coil comprises a plurality of coil units, the number of turns of the coil in each coil unit is the same, each coil unit is provided with a tap, and the tail end of the tap is connected with a tap terminal; the change-over switch group comprises two switch components which are connected in parallel, each switch component comprises a movable end terminal and a coil selection switch, one end of each coil selection switch is connected with the movable terminal, and the other end of each coil selection switch is connected with a power grid cable; the adjustable compensation capacitor array comprises a compensation capacitor network, and the compensation capacitor network comprises a plurality of compensation capacitors connected in series. The invention can quickly and accurately regulate the output power in a larger range under the condition of not cutting off the load, saves the time cost and simultaneously prolongs the service life of the receiving end coil and the converter.
Description
Technical Field
The invention relates to the field of wireless power supply, in particular to a high-power wireless transmission device and a transmission method for an electric automobile.
Background
The circuit principle of the high-power dynamic wireless power supply system is shown in figure 1, and the high-power dynamic wireless power supply system comprises an energy transmitting device (a ground part) and an energy receiving device (a vehicle-mounted part). In the system, an energy transmitting device is responsible for outputting energy, and the traditional control method is to control the current output to a primary coil to control the current output to a secondary coil.
Fig. 2 is a schematic diagram of an energy management circuit structure of two typical energy emitting devices applied in a high-power wireless power supply system, in fig. 2a, the magnitude of the output current is controlled by controlling the duty ratio of a switching device of a DC-DC converter, in fig. 2b, the magnitude of the output current is controlled by controlling the phase angle of the phase shift of a full-bridge inverter, and both the magnitude of the output current and the phase angle are controlled by a digital control circuit. The system can adjust the duty ratio or the phase angle according to the output requirement in a certain range accurately, so that the output current meets the requirement. However, in a dynamic wireless power supply system of an electric vehicle, the power of a vehicle running on the system may have a large difference, for example, the power of a low-speed electric four-wheel vehicle is only about 6kW, while the power of an electric dump truck may reach 45kW, which may exceed the adjustment range of the energy management structure and the control method, or the system may not reach the stability of the power in a short time, which may cause a large oscillation of the output power, and may damage a coil power supply device at the receiving end in a serious case.
Therefore, the present application is directed to provide a high-power wireless transmission device and a transmission method for an electric vehicle, which can achieve optimal power output under a wide range of loads.
Disclosure of Invention
In view of the above defects in the prior art, the present invention provides a high-power wireless transmission device and a transmission method for an electric vehicle, which can achieve optimal power output under a wide range of loads, and can rapidly and accurately adjust output power in a large range without cutting off the load by switching the number of coil units with load, thereby saving time cost and improving the service life of a receiving end coil and a converter.
In order to achieve the above object, a first aspect of the present invention provides a high-power wireless transmission device for an electric vehicle, including an energy receiving device and an energy transmitting device, where the energy transmitting device includes:
the transmitting coil comprises a plurality of coil units, the number of turns of the coil in each coil unit is the same, each coil unit is provided with a tap, and the tail end of the tap is connected with a tap terminal;
the change-over switch group comprises two switch components which are connected in parallel, each switch component comprises a movable end terminal and a coil selection switch, one end of each coil selection switch is connected with the movable terminal, and the other end of each coil selection switch is connected with a power grid cable;
the adjustable compensation capacitor array comprises a compensation capacitor network, and the compensation capacitor network comprises a plurality of compensation capacitors connected in series;
and the power regulating unit is a DC-DC converter or a high-frequency inverter or a combination of the DC-DC converter and the high-frequency inverter.
Further, the switch assembly includes a current limiting resistor, and the coil selection switch is connected to the movable terminal through the current limiting resistor.
Further, the coil selection switch is a single pole, triple throw circuit breaker immersed in insulating oil.
Furthermore, the adjustable compensation capacitor array comprises a switch switching array formed by a plurality of capacitor switches, and one end of the transmitting coil is connected with the compensation capacitor through the capacitor switches.
Further, the capacitive switch is immersed in insulating oil.
Furthermore, the capacitance switch is composed of a pair of anti-series fully-controlled switches.
Further, the coil selection switch is composed of a pair of anti-series fully-controlled switches.
Further, the compensation capacitor is connected in series between the coil units.
The second aspect of the invention provides a high-power wireless transmission method for an electric automobile, which is realized based on the high-power wireless transmission device for the electric automobile and comprises the following steps:
s1, comparing the power demand value needed by the energy receiving device with the current output power of the transmitting coil to obtain a difference power value P e ；
S2, difference power value P e Change to P e ＝n b P n +kP n Number of coil units n b Satisfies n b P n ＜P e ＜(n b +1)P n K is in the range of [0,1), P n Power of one coil unit, n b Is an integer;
s3, adjusting the high-power wireless power transmission device to make the power reach n b P n Adjusting the power adjusting unit to obtain an output power kP n Step S1 is executed.
Compared with the prior art, the invention has the following technical effects:
1. aiming at the problem that a wireless power supply system in the prior art has a narrow power range, the low-energy transmitting device is additionally provided with the change-over switch group for selecting different coil units according to power requirements, namely selecting different coil turns, so that the wide-range transmission of energy is realized.
2. In order to realize accurate power transmission, the energy transmitting device is matched with the traditional power adjusting unit, the power of an integral multiple of coil units is adjusted through the energy transmitting device, the power of less than one coil unit is adjusted through the traditional power adjusting unit, and the effect of wide-range accurate transmission of electric energy is achieved.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic block diagram of a dynamic wireless power supply system;
fig. 2 is a schematic circuit diagram of two typical energy emitting devices in the prior art, fig. 2a is a schematic circuit diagram of an energy emitting device when a DC-DC converter is used as a power conditioning module, and fig. 2b is a schematic circuit diagram of an energy emitting device when a high frequency inverter is used as a power conditioning module;
FIG. 3 is a schematic circuit diagram of a high-power wireless transmission device of an electric vehicle according to a first embodiment of the invention;
FIG. 4 is a schematic circuit diagram of a second embodiment of the present invention, illustrating a high power wireless transmission device of an electric vehicle;
FIG. 5 is a schematic circuit diagram of a third embodiment of the present invention, illustrating a high power wireless transmission device of an electric vehicle;
fig. 6 is a control flowchart of an electric vehicle high-power wireless transmission method according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of each component in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
Some exemplary embodiments of the invention have been described for illustrative purposes, and it is to be understood that the invention may be practiced otherwise than as specifically described.
The invention provides a high-power wireless transmission device for an electric automobile, which comprises an energy receiving device and an energy transmitting device, wherein the energy transmitting device comprises:
the transmitting coil comprises a fixed end and a plurality of coil units, the number of turns of the coil in each coil unit is the same, each coil unit is provided with a tap, and the tail end of the tap is connected with a tap terminal; the number of turns of the coils in the coil units is greater than or equal to 1, that is, each coil unit can be composed of one turn of coil or a plurality of coils, and the number of turns of the specific coils can be selected according to actual conditions.
The change-over switch group comprises two switch components connected in parallel, each switch component comprises a movable end terminal, a coil selection switch and a current-limiting resistor, one end of each coil selection switch is connected with the corresponding movable terminal, the other end of each coil selection switch is connected with a power grid cable, the coil selection switches are connected with the corresponding movable terminals through the current-limiting resistors, different coil units are selected by the aid of the movable segments according to different power requirements in the adjusting process, and the selected coil units are switched on by controlling the coil selection switches to adjust power.
The adjustable compensation capacitor array comprises a compensation capacitor network, and the compensation capacitor network comprises a plurality of compensation capacitors connected in series;
and the power regulating unit is a DC-DC converter or a high-frequency inverter or a combination of the DC-DC converter and the high-frequency inverter.
As shown in fig. 3, for the high-power wireless transmission device of the electric vehicle in embodiment 1, the number of turns of the transmitting coil is 8, and the transmitting coil is numbered and sorted according to 1-8, each coil unit in this embodiment includes one turn of coil, and the transmitting coil in this embodiment includes 8 coil units; the coil selection switch is single-pole three-throw circuit breakers Ja and Jb immersed in insulating oil, the movable segments are Ka and Kb respectively, and the current limiting resistors in the switch assembly are R1 and R2 respectively; the adjustable compensation capacitor array comprises capacitors C1, C2, C3, C4, C5, C6, C7 and C8 which are connected in series, and further comprises a switch switching array which is composed of 8 capacitor switches K1, K2, K3, K4, K5, K6, K7 and K8, wherein the capacitor switches correspond to the capacitors, as shown in the figure, one ends of the capacitor switches K1, K2, K3, K4, K5, K6, K7 and K8 are connected with a fixed end M of a transmitting coil, the other ends of the capacitor switches are connected with the capacitors respectively, and the capacitor switches in the embodiment are immersed in insulating oil.
In the embodiment, the insulating oil is used for avoiding electric arcs generated when the circuit breaker is closed in an electrified mode, and the current limiting resistors R1 and R2 are used for ensuring that when Ka and Kb mobile terminals are connected with different turns in a turn switching process, the circulating current generated by a circuit loop between the two mobile terminals is reduced, and the switch is prevented from being damaged due to overlarge current. One end of the single-pole triple-throw breaker Ja is connected with an input cable, and the other end of the single-pole triple-throw breaker Ja is respectively connected with a mobile terminal Ka, a suspension circuit and a current-limiting resistor which are made of copper sheets. One end of the current-limiting resistor is connected with the single-pole three-throw switch, and the other end is connected with the mobile terminal Ka. The movable terminal is connected with the single-pole three-throw switch and the current-limiting resistor, the other end of the movable terminal moves between the fixed terminals through a mechanical device and is connected with the transmitting end winding through effective contact with the fixed terminals, and the movable terminal can move along the direction of increasing and reducing the number of turns of the winding and can be contacted with the fixed terminals of other windings after being completely separated from one of the fixed terminals.
As shown in fig. 4, the present embodiment is a high-power wireless transmission device for an electric vehicle in embodiment 2, and is different from embodiment 1 in that a coil selection switch and a capacitance switch of the present invention are each composed of a pair of anti-series fully-controlled switches. In the embodiment, the electronic switch formed by the switch tube is adopted, the use of insulating oil is omitted, the structure of the device is simplified, the volume of the device is saved, and the switching speed is accelerated. In this embodiment, two anti-series fully-controlled power electronic switching devices adopt the same-switch and same-switch mode, when the circuit breaker at the winding terminal is in a suspended state, two point circuit breakers of Ja or Jb are turned off simultaneously, and the other switch states are completely the same as those of the mechanical switch.
As shown in fig. 5, in the high-power wireless transmission device of the electric vehicle in embodiment 3, the difference z between this embodiment and embodiment 2 is that the compensation capacitor is connected in series between the coil units, and no additional switch array is needed, and in the case of sufficient magnetic pole space at the transmitting end, the compensation capacitor is connected in series between the coils of each turn, so that the control mode is simpler and the switching speed is faster.
In a specific embodiment, a high-power wireless transmission method for an electric vehicle is provided, which is implemented based on the high-power wireless transmission device for an electric vehicle described in the above embodiment.
In the compensation capacitor network in the transmission device, the capacitance value of a single compensation capacitor is C, the inductance value between every two fixed terminals is L, and the relation between the system working frequency f is as follows:
when the number of coils connected between the mobile terminals is n, the capacitor array should be connected in series with the number of capacitors n, and the resonant frequency f of the system is n
The whole system still realizes resonance under the working frequency.
The system operating principle and method are explained below.
In the wireless power transmission process, the induced voltage of the energy receiving device follows the following rule:
V s ＝jωMI 1 ； (2)
wherein V s Is an equivalent voltage source of the receiving coil of the energy receiving device, I 1 Is the excitation current flowing through the transmitter coil, and as can be seen from equation (2), the energy transferred to the receiver coil is related to the frequency, the mutual inductance, and the current flowing through the inductor.
For the energy receiving device (taking the vehicle-mounted storage battery to be charged as an example), it can be equivalent to a resistor with a fixed resistance value, so according to the formula (3), the larger the induced voltage of the transmitting device is, the larger the charging power of the battery is.
Where k is the coupling coefficient, L 1 、L 2 The inductance of the transmitter coil and the inductance of the receiver coil are expressed by equation (4), and since the mutual inductance is positively correlated with the inductance of the transmitter coil and the inductance of the receiver coil, the energy transmitted to the secondary side can be changed by changing the inductance of the transmitter or receiver side.
L∝N 2 ； (5)
N is the number of turns of the coil, and the inductance is in direct proportion to the square of the number of turns as can be known from the formula (5), so that the energy transmitted to the secondary side can be adjusted by adjusting the number of turns of the transmitting coil and the receiving coil as can be known from the combined formulas (2) - (4). The number of primary windings of the wireless power transmission system of the high-power electric automobile does not exceed 10 turns, so that the output power can be adjusted in a larger range by increasing or decreasing the number of turns.
In a specific embodiment, the wireless transmission method includes the following steps:
s1, comparing the power demand value needed by the energy receiving device with the current output power of the transmitting coil to obtain a difference power value P e ；
Taking the high-power wireless transmission device for the electric vehicle described in embodiment 1 as an example, in this embodiment, each coil unit includes one turn of coil, when the device operates normally, two mobile terminals are connected to the same interface, the single-pole triple-throw circuit breakers are both connected to the interface 1, and the power that can be transmitted by the current high-power wireless transmission device is P 1 The power requirement required by the energy receiving device is P 2 Further obtain the difference power value P e ＝P 2 -P 1 。
S2, difference power value P e The change is as follows: p is e ＝n b P n +kP n The number of coil units n b Satisfies n b P n ＜P e ＜(n b +1)P n Wherein k is in the range of [0,1), P n Power of one coil unit, n b Is an integer when n b When n is a positive integer, it indicates that the power required by the energy receiving device is increased, and when n is a positive integer, the number of coil units is increased b When the number is a negative integer, the power required by the energy receiving device is reduced, and the number of the coil units is required to be reduced; for example, when the energy receiving device needs to receive the difference power value P e At 3.4Pn, P is present e ＝3P n +0.4P n When the power value P is different e is-3.4P n At this time P e ＝-3P n -0.4P n Or P is e ＝-4P n +0.6P n The adjustment of the difference power value is achieved according to the following steps.
S3, adjusting the high-power wireless power transmission device to make the power reach n b P n The output power kP is obtained by adjusting the power adjusting unit n Step S1 is executed;
when the number of the coil units under the current output power of the transmitting coil is n a On the basis of which the movable terminal reselection n is adjusted b A coil unit is then switched in n b A capacitor to obtain an output power n b P n (ii) a Through n b A coil unit and n b The capacitors are connected to n a +n b The coil units are used as transmitting coils, and n in the capacitor array a +n b The capacitor switch is closed to make n a +n b The capacitor is connected into the energy transmitting device, and provides power for the energy receiving device as follows: p 1 +n b P n Then, step S1 is executed;
taking the wireless transmission device with high power for electric vehicle described in embodiment 1 as an example, Ja is first switched to interface 2, and then the corresponding terminal Ka is moved up to the corresponding interface n b When Ka completes contact with the target interface, the breaker Ja switches to the fixed terminal 3. Jb then switches to fixed terminal 2, Kb corresponding to it moves up to the same winding interface as Ka, and Jb then switches back to fixed terminal 1, at which point Jb and Kb complete the adjustment. Finally, Ja is cut to the fixed terminal 1, and the number of turns of the winding is adjusted; then, the number of the capacitors is adjusted to n in the capacitor array b The capacitor switch is closed to make n b The capacitor is connected into the energy transmitting device to complete the adjustment of the energy transmitting device.
The output power kP is obtained by adjusting the power adjusting unit n Step S1 is executed.
The adjusting method of the power adjusting unit comprises the steps of adjusting the on and off of a switching tube of the inverter by adopting the method in the prior art, adjusting the duty ratio of the switching tube and further realizing the power kP n Since the method of adjusting the power by adjusting the duty ratio of the switching tube is very common in the prior art, it is not described herein again.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (9)
1. The high-power wireless transmission device for the electric automobile is characterized by comprising an energy receiving device and an energy transmitting device, wherein the energy transmitting device comprises:
the transmitting coil comprises a plurality of coil units, the number of turns of the coil in each coil unit is the same, each coil unit is provided with a tap, and the tail end of the tap is connected with a tap terminal;
the change-over switch group comprises two switch components which are connected in parallel, each switch component comprises a movable end terminal and a coil selection switch, one end of each coil selection switch is connected with the movable terminal, and the other end of each coil selection switch is connected with a power grid cable;
the adjustable compensation capacitor array comprises a compensation capacitor network, wherein the compensation capacitor network comprises a plurality of compensation capacitors connected in series;
and the power regulating unit is a DC-DC converter or a high-frequency inverter or a combination of the DC-DC converter and the high-frequency inverter.
2. The high-power wireless transmission device for the electric automobile according to claim 1, wherein the switch assembly comprises a current-limiting resistor, and the coil selection switch is connected with the movable terminal through the current-limiting resistor.
3. The high-power wireless transmission device for the electric vehicle according to claim 2, wherein the coil selection switch is a single-pole three-throw circuit breaker immersed in insulating oil.
4. The high-power wireless transmission device for the electric vehicle according to claim 1, wherein the adjustable compensation capacitor array comprises a switch switching array formed by a plurality of capacitor switches, and one end of the transmitting coil is connected to the compensation capacitor through the capacitor switch.
5. The high-power wireless transmission device for the electric automobile according to claim 4, wherein the capacitance switch is immersed in insulating oil.
6. The high-power wireless transmission device for the electric vehicle according to claim 4, wherein the capacitance switch is composed of a pair of anti-series fully-controlled switches.
7. The high-power wireless transmission device for the electric automobile according to claim 1, wherein the coil selection switch is composed of a pair of anti-series fully-controlled switches.
8. The high-power wireless transmission device for the electric automobile according to claim 1, wherein the compensation capacitor is connected in series between the coil units.
9. A high-power wireless transmission method for an electric vehicle is realized based on the high-power wireless transmission device for the electric vehicle of any one of claims 1 to 8, and comprises the following steps:
s1, comparing the power demand value needed by the energy receiving device with the current output power of the transmitting coil to obtain a difference power value P e ；
S2, difference power value P e Change to P e ＝n b P n +kP n Number of coil units n b Satisfies n b P n ＜P e ＜(n b +1)P n K is in the range of [0,1), P n Power of one coil unit, n b Is an integer;
s3, adjusting the high-power wireless power transmission device to make the power reach n b P n Adjusting the power adjusting unit to obtain an output power kP n Step S1 is executed.
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| CN202210914829.7A CN115091978A (en) | 2022-08-01 | 2022-08-01 | High-power wireless transmission device and method for electric automobile |
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| CN202210914829.7A CN115091978A (en) | 2022-08-01 | 2022-08-01 | High-power wireless transmission device and method for electric automobile |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103348555A (en) * | 2010-12-31 | 2013-10-09 | 诺基亚公司 | Power transfer |
| CN204928180U (en) * | 2015-09-17 | 2015-12-30 | 贾继莹 | Three phase load automatic balance change over switch |
| EP3139466A1 (en) * | 2015-09-07 | 2017-03-08 | Continental Automotive GmbH | Power conversion module for inductive charging for vehicles and method for operating a power conversion module |
| CN108988502A (en) * | 2018-07-16 | 2018-12-11 | 国网冀北电力有限公司电力科学研究院 | A kind of adjusting method and device of wireless charging system |
| WO2020070115A1 (en) * | 2018-10-02 | 2020-04-09 | Universität Stuttgart | Device for non-contact inductive energy transfer, in particular for inductive charging processes in motor vehicles |
| CN111082540A (en) * | 2019-12-17 | 2020-04-28 | 西南交通大学 | Multi-tap wireless power transmission system and efficiency optimization method thereof |
| CN111711284A (en) * | 2020-06-19 | 2020-09-25 | 北京有感科技有限责任公司 | Remote power supply system |
| CN114454739A (en) * | 2022-02-22 | 2022-05-10 | 淮阴工学院 | Dynamic wireless charging system for short segmented transmitting coil parallel type electric automobile |
-
2022
- 2022-08-01 CN CN202210914829.7A patent/CN115091978A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103348555A (en) * | 2010-12-31 | 2013-10-09 | 诺基亚公司 | Power transfer |
| EP3139466A1 (en) * | 2015-09-07 | 2017-03-08 | Continental Automotive GmbH | Power conversion module for inductive charging for vehicles and method for operating a power conversion module |
| CN204928180U (en) * | 2015-09-17 | 2015-12-30 | 贾继莹 | Three phase load automatic balance change over switch |
| CN108988502A (en) * | 2018-07-16 | 2018-12-11 | 国网冀北电力有限公司电力科学研究院 | A kind of adjusting method and device of wireless charging system |
| WO2020070115A1 (en) * | 2018-10-02 | 2020-04-09 | Universität Stuttgart | Device for non-contact inductive energy transfer, in particular for inductive charging processes in motor vehicles |
| CN111082540A (en) * | 2019-12-17 | 2020-04-28 | 西南交通大学 | Multi-tap wireless power transmission system and efficiency optimization method thereof |
| CN111711284A (en) * | 2020-06-19 | 2020-09-25 | 北京有感科技有限责任公司 | Remote power supply system |
| CN114454739A (en) * | 2022-02-22 | 2022-05-10 | 淮阴工学院 | Dynamic wireless charging system for short segmented transmitting coil parallel type electric automobile |
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