An array coupler control structure and control method for an array wireless power transmission system

Abstract

The present invention discloses an array coupler control structure of an array wireless power transmission system, comprising a control structure No. 1, a control structure No. 2, a control structure No. 3 and a control structure No. 4; the control structure No. 1 controls four non-adjacent transmitting coils in the array transmitting coil structure; the control structure No. 2 controls one transmitting coil located at the center of the array transmitting coil structure; the control structure No. 3 controls two non-adjacent transmitting coils among the remaining four transmitting coils in the array transmitting coil structure; the control structure No. 4 controls the remaining two transmitting coils; a corresponding control method is also disclosed; an optimized combination of a circuit structure and a control structure is achieved, the spatial position is reduced, the leakage inductance between coils is reduced, a higher transmission efficiency and transmission power are ensured, and the overall anti-offset performance is improved.

Description

Technical Field

[0001] This patent relates to the field of contactless power transmission, specifically an array coupler control structure and control method for an array wireless power transmission system. Background Art

[0002] The magnetic coupling mechanism is a key link in the wireless power transmission system, and the performance of the coupling mechanism directly affects the working performance of the wireless power transmission system. Compared with the single-transmitter single-receiver wireless power transmission system, the coil structure of the multi-transmitter multi-receiver wireless power transmission system can improve the anti-deviation performance of the wireless power transmission system to a certain extent;

[0003] When the array-type transmitting coil uses multiple coupler units to work in the same phase, the magnetic circuit will be too open, resulting in large magnetic leakage and low transmission efficiency. Therefore, it is necessary to adopt a segmented switching power supply of the array coupler to reduce magnetic field leakage and improve transmission efficiency. The prior art generally adopts a single-single inverter switching mode, that is, each inverter controls a transmitting coil to achieve switching power supply for the array coil transmitting coil, but this method can only achieve one-to-one non-contact transmission of electric energy from a single coupler to a single coupler, and the anti-offset performance is weak, and it is impossible to fully utilize multiple couplers to work together to achieve many-to-one non-contact transmission of electric energy. Summary of the invention

[0004] The present invention aims to solve the problem that the array coil transmitting coil in the prior art can only realize one-to-one non-contact transmission of electric energy between single couplers, has weak anti-offset performance, and cannot fully utilize multiple couplers to work together to realize multi-to-one non-contact transmission of electric energy. Without changing the coil topology, the power supply control of any single coil coupler among the 9 coils, the power supply method of any adjacent double coil coupler, and the power supply control of any adjacent four coil coupler can be realized by combining the opening and closing of the disconnecting series switch and the short-circuit jumper switch, and each coil is controlled by an independent inverter, which can be achieved by adjusting the inverter, and the coupling resonant current phase in each coil is independently controlled, thereby realizing the dynamic shaping of the magnetic field between the couplers.

[0005] In view of the above problems, the technical solution adopted by the present invention is: an array coupler control structure of an array wireless power transmission system, comprising a control structure No. 1, a control structure No. 2, a control structure No. 3 and a control structure No. 4; the control structure No. 1 controls four non-adjacent transmitting coils in the array transmitting coil structure; the control structure No. 2 controls a transmitting coil located in the center of the array transmitting coil structure; the control structure No. 3 controls two non-adjacent transmitting coils among the remaining four transmitting coils in the array transmitting coil structure; the control structure No. 4 controls the remaining two transmitting coils;

[0006] The array-type transmitting coil structure includes transmitting coil No. 1, transmitting coil No. 2, transmitting coil No. 3, transmitting coil No. 4, transmitting coil No. 5, transmitting coil No. 6, transmitting coil No. 7, transmitting coil No. 8 and transmitting coil No. 9. The transmitting coils are arranged in the order of the coil numbers in the shape of "N".

[0007] Furthermore, the control structure No. 1, the control structure No. 2, the control structure No. 3 and the control structure No. 4 all control the coils corresponding to their respective controls through an inverter, a short-circuit jumper switch and an open-circuit series switch.

[0008] Furthermore, the control structure No. 1 includes an inverter No. 1, a main switch No. 1 K1 connected in series with the inverter No. 1, and a disconnecting series switch and a short-circuit jumper switch respectively configured on the transmitting coil No. 1, the transmitting coil No. 3, the transmitting coil No. 7, and the transmitting coil No. 9; the control structure No. 1 and the transmitting coil No. 1, the transmitting coil No. 3, the transmitting coil No. 7, and the transmitting coil No. 9 form a control loop;

[0009] The second control structure includes a second inverter, a second main switch K2 connected in series with the second inverter, and a disconnecting series switch and a short-circuit jumper switch configured on the fifth transmitting coil; the second control structure and the fifth transmitting coil form a control loop;

[0010] The No. 3 control structure includes a No. 3 inverter, a No. 3 main switch K3 connected in series with the No. 3 inverter, and a disconnecting series switch and a short-circuit jumper switch respectively configured on the No. 2 transmitting coil and the No. 8 transmitting coil; the No. 3 control structure and the No. 2 transmitting coil and the No. 8 transmitting coil form a control loop;

[0011] The No. 4 control structure includes a No. 4 inverter, a No. 4 main switch K4 connected in series with the No. 4 inverter, and a disconnecting series switch and a short-circuit jumper switch respectively configured on the No. 4 transmitting coil and the No. 6 transmitting coil. The No. 4 control structure and the No. 4 transmitting coil and the No. 6 transmitting coil form a control loop.

[0012] As another aspect of the present invention, it also relates to a control method for the array coupler control structure of the above-mentioned array wireless power transmission system, by combining the opening and closing of the disconnecting series switch and the short-circuiting jumper switch, a power supply control method for any single-coil coupler among the 9 coils, a power supply control method for any adjacent double-coil coupler and a power supply control method for any adjacent four-coil coupler are realized.

[0013] Furthermore, the power supply control method for any single-coil coupler is as follows: when the center position of the receiving coil is at the center of the single transmitting coil, the inverter of the control structure where the single transmitting coil is located is turned on, and then the short-circuit jumper switch configured for the single transmitting coil is turned on and the disconnecting series switch configured for the single transmitting coil is closed, while keeping other short-circuit jumper switches on the control structure where the single transmitting coil is located in a closed state, closing the main switch on the control structure where the single transmitting coil is located, and turning on power to the single transmitting coil.

[0014] Furthermore, the power supply control method for any adjacent dual-coil coupler is as follows: when the receiving coil performs linear motion within the range of two adjacent transmitting coils, the inverter of the control structure where the two adjacent transmitting coils are located is turned on, and then the short-circuit jumper switch configured for each of the two adjacent transmitting coils is turned on and the disconnection series switch configured for each of the two adjacent transmitting coils is selected to be closed, while keeping other short-circuit jumper switches on the control structure where the two adjacent transmitting coils are located in a closed state, closing the main switch on the control structure where the two adjacent transmitting coils are located, and turning on power supply to the two adjacent transmitting coils; the two adjacent transmitting coils are controlled by independent inverters, so that the current phase of the coupler array can be adjusted by the inverter to realize the orientation of the magnetic field, strengthen the magnetic induction intensity in a predetermined direction, and weaken the magnetic induction intensity in an irrelevant direction.

[0015] Furthermore, the power supply control method for any adjacent four-coil coupler is as follows: when the receiving coil performs a linear motion within the range of four adjacent transmitting coils, the inverter of the control structure where the four adjacent transmitting coils are located is turned on, and then the short-circuit jumper switch configured for each of the four adjacent transmitting coils is turned on and the disconnection series switch configured for each of the two adjacent transmitting coils is selected to be closed, while keeping other short-circuit jumper switches on the control structure where the four adjacent transmitting coils are located in a closed state, closing the main switch on the control structure where the four adjacent transmitting coils are located, and turning on power supply to the four adjacent transmitting coils; the four adjacent transmitting coils are all controlled by independent inverters, so that the current phase of the coupler array is conveniently adjusted by the inverter to achieve the orientation of the magnetic field, adjust the direction of the magnetic field, strengthen the magnetic induction intensity in a predetermined direction, and weaken the magnetic induction intensity in an irrelevant direction.

[0016] Furthermore, according to the difference between the transmitting coils before and after the switching, the opening and closing states of the inverter, main switch, disconnect series switch, and short-circuit jumper switch of the corresponding transmitting coil are adjusted. When switching the transmitting coil on the same control structure, the inverter on the corresponding control structure must be turned off first, then the switch operation is performed, and finally the inverter on the corresponding control structure is turned on.

[0017] The beneficial effects and features of the present invention are:

[0018] (1) The array coupler control structure for the array wireless power transmission system of the present invention; by switching the switches of the four inverters, the control and selection of various excitation modes for the array transmitting coil structure can be realized; compared with the single-single inverter switching mode, nine inverters are required to correspond to it in sequence, the circuit structure is redundant, and the control structure is complex. This paper uses a four-inverter array to control the coil windings in groups, realizes the optimal combination of the circuit structure and the control structure, reduces the overlapping area between the coil windings and reduces the spatial position, reduces the leakage inductance between the coils, and can improve the transmission efficiency between the transceiver system.

[0019] (2) The array coupler control structure of the array wireless power transmission system of the present invention; by selecting the working mode of the inverter when the receiving coil is in different positions, and selecting the switching working conditions of a single inverter, two inverters and four inverters, the mutual inductance change between the coils can be minimized, thereby preventing the efficiency drop phenomenon, ensuring higher transmission efficiency and transmission power, and improving the overall anti-offset performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the circuit design structure of a preferred embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the arrangement structure of the transmitting coil of a preferred embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the inverter and the transmitting coil in a preferred embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the corresponding relationship between the serial numbers of the turned-on coils in different working modes of a preferred embodiment of the present invention;

[0024] Figure 5 A schematic diagram of the coil arrangement structure in a space structure of a preferred embodiment of the present invention;

[0025] Figure 6 Schematic diagram of coil opening in single coil control mode of a preferred embodiment of the present invention (taking transmitting coil No. 1 as an example, the shaded part is the moving range);

[0026] Figure 7 Schematic diagram of coil opening in dual-coil control mode of a preferred embodiment of the present invention (taking transmitting coils No. 1 and 2 as examples, arrows are moving directions, and the shaded part is the moving range);

[0027] Figure 8Schematic diagram of coil opening in the four-coil control mode of a preferred embodiment of the present invention (taking transmitting coils No. 1, 2, 3, and 4 as an example, the arrow is the moving direction, and the shaded part is the moving range);

[0028] Fig. 9 Schematic diagram of the change of the mutual inductance of the transmitting coil in the single-coil control mode of the preferred embodiment of the present invention (taking the change of the mutual inductance of the No. 1 transmitting coil in the excitation mode as an example, the ordinate represents the mutual inductance, and the abscissa represents the offset distance between the transmitting coil and the receiving coil);

[0029] Fig.10 Schematic diagram of the change of mutual inductance of the transmitting coil in the dual-coil control mode of a preferred embodiment of the present invention (taking the change of mutual inductance in the excitation mode of the No. 1 transmitting coil and the No. 2 transmitting coil as an example, the ordinate represents the mutual inductance, and the abscissa represents the offset distance between the transmitting coil and the receiving coil);

[0030] Fig.11 Schematic diagram of the change of mutual inductance of the transmitting coil in the four-coil control mode of the preferred embodiment of the present invention (taking the change of mutual inductance in the excitation mode of the first transmitting coil, the second transmitting coil, the third transmitting coil and the fourth transmitting coil as an example, the ordinate represents the mutual inductance, and the abscissa represents the offset distance between the transmitting coil and the receiving coil).

[0031] The reference numerals in the figure represent respectively: 1- No. 1 transmitting coil, 1-1-1- No. 1 coil disconnect series switch, 1-1-2- No. 1 coil short-circuit jumper switch, 2- No. 2 transmitting coil, 3-2-1- No. 2 coil disconnect series switch, 3-2-2- No. 2 coil short-circuit jumper switch, 3- No. 3 transmitting coil, 1-3-1- No. 3 coil disconnect series switch, 1-3-2- No. 3 coil short-circuit jumper switch, 4- No. 4 transmitting coil, 4-4-1- No. 4 coil disconnect series switch, 4-4-2- No. 4 coil short-circuit jumper switch, 5- No. 5 transmitting coil, 2-5-1- No. 5 Coil No. 5 circuit breaker series switch, 2-5-2-coil No. 5 short circuit jumper switch, 6-transmitting coil No. 6, 4-6-1-coil No. 6 circuit breaker series switch, 4-6-2-coil No. 6 short circuit jumper switch, 7-transmitting coil No. 7, 1-7-1-coil No. 7 circuit breaker series switch, 1-7-2-coil No. 7 short circuit jumper switch, 8-transmitting coil No. 8, 3-8-1-coil No. 8 circuit breaker series switch, 3-8-2-coil No. 8 short circuit jumper switch, 9-transmitting coil No. 9, 1-9-1-coil No. 9 circuit breaker series switch, 1-9-2-coil No. 9 short circuit jumper switch. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Please refer to Figure 1 , an array coupler control structure of an array wireless power transmission system, comprising a control structure No. 1, a control structure No. 2, a control structure No. 3 and a control structure No. 4; the control structure No. 1 controls four non-adjacent transmitting coils in the array transmitting coil structure; the control structure No. 2 controls a transmitting coil located in the center of the array transmitting coil structure; the control structure No. 3 controls two non-adjacent transmitting coils among the remaining four transmitting coils in the array transmitting coil structure; the control structure No. 4 controls the remaining two transmitting coils (it should be noted that Figure 1 It represents the control relationship, not the position relationship. The position relationship of each control coil is shown in Figure 2 );

[0034] Please refer to Figure 2 The array-type transmitting coil structure includes a first transmitting coil 1, a second transmitting coil 2, a third transmitting coil 3, a fourth transmitting coil 4, a fifth transmitting coil 5, a sixth transmitting coil 6, a seventh transmitting coil 7, an eighth transmitting coil 8 and a ninth transmitting coil 9. The transmitting coils are arranged in an "N" shape in the order of the coil numbers.

[0035] Please refer to Figure 3 , Figure 4 The control structure No. 1, the control structure No. 2, the control structure No. 3 and the control structure No. 4 all control the corresponding coils through the inverter, the short-circuit switch and the short-circuit switch.

[0036] In order to ensure that all nine transmitting coils can be controlled by four inverters, and that the control of the coil array can be formed in any four-coil mode, that is, no control conflict is achieved and optimal control is achieved. Since the frequency of the No. 5 transmitting coil in the four-coil mode is higher, it needs to be connected to an inverter separately, and the No. 1 inverter needs to be connected to four transmitting coils in non-adjacent positions, while the No. 3 and No. 4 inverters can be connected to non-adjacent coils on the diagonal line to achieve the operation of the four-coil mode.

[0037] Specifically, the No. 1 control structure includes the No. 1 inverter, the No. 1 main switch K1 connected in series with the No. 1 inverter, and a circuit breaker and a short-circuit switch respectively arranged on the No. 1 transmitting coil, the No. 3 transmitting coil, the No. 7 transmitting coil, and the No. 9 transmitting coil; the No. 1 control structure and the No. 1 transmitting coil, the No. 3 transmitting coil, the No. 7 transmitting coil, and the No. 9 transmitting coil form a control loop;

[0038] The second control structure includes a circuit breaker and a short-circuit switch provided on the second inverter and the fifth transmitting coil; the second control structure and the fifth transmitting coil form a control loop;

[0039] The control structure No. 3 includes a circuit breaker and a short-circuit switch respectively arranged on the inverter No. 3 and the transmitting coil No. 2 and the transmitting coil No. 8; the control structure No. 3 and the transmitting coil No. 2 and the transmitting coil No. 8 form a control loop;

[0040] The No. 4 control structure includes a No. 3 inverter and a No. 4 transmitting coil and a No. 6 transmitting coil, each of which is provided with a circuit breaker and a short-circuit switch.

[0041] The control method of the array coupler control structure of the above-mentioned array wireless power transmission system: without changing the coil topology structure, through the opening and closing combination of the open-circuit series switch and the short-circuit jumper switch, the power supply control method of any single-coil coupler among the 9 coils, the power supply control method of any adjacent double-coil coupler and the power supply control method of any adjacent four-coil coupler are realized.

[0042] Please refer to Figure 6 The power supply control method of any single-coil coupler is as follows: when the center position of the receiving coil is at the center of the single transmitting coil, the inverter of the control structure where the single transmitting coil is located is turned on, and then the short-circuit jumper switch configured for the single transmitting coil is turned on and the disconnecting series switch configured for the single transmitting coil is closed, while keeping other short-circuit jumper switches on the control structure where the single transmitting coil is located in a closed state, closing the main switch on the control structure where the single transmitting coil is located, and turning on the power supply to the single transmitting coil.

[0043] Please refer to Figure 7The power supply control method for any adjacent double-coil coupler is as follows: when the receiving coil performs linear motion within the range of two adjacent transmitting coils (linear motion on the center line, within the range of the vertical projection), the inverter of the control structure where the two adjacent transmitting coils are located is turned on, and then the short-circuit jumper switch configured for each of the two adjacent transmitting coils is turned on and the disconnection series switch configured for each of the two adjacent transmitting coils is selected to be closed, while keeping other short-circuit jumper switches on the control structure where the two adjacent transmitting coils are located in a closed state, closing the main switch on the control structure where the two adjacent transmitting coils are located, and turning on power supply to the two adjacent transmitting coils; the two adjacent transmitting coils are controlled by independent inverters, so that the current phase of the coupler array is conveniently adjusted through the inverter to realize the orientation of the magnetic field, strengthen the magnetic induction intensity in the predetermined direction, and weaken the magnetic induction intensity in irrelevant directions.

[0044] Please refer to Figure 8 The power supply control method for any adjacent four-coil coupler is as follows: when the receiving coil performs linear motion within the range of four adjacent transmitting coils (linear motion on the diagonal line, within the range of the vertical projection), the inverter of the control structure where the four adjacent transmitting coils are located is turned on, and then the short-circuit jumper switch configured for each of the four adjacent transmitting coils is turned on and the disconnection series switch configured for each of the two adjacent transmitting coils is selected to be closed, while keeping the other short-circuit jumper switches on the control structure where the four adjacent transmitting coils are located in a closed state, closing the main switch on the control structure where the four adjacent transmitting coils are located, and turning on the power supply to the four adjacent transmitting coils; the four adjacent transmitting coils are all controlled by independent inverters, so that it is convenient to adjust the current phase of the coupler array through the inverter, realize the orientation of the magnetic field, adjust the direction of the magnetic field, strengthen the magnetic induction intensity in the predetermined direction, and weaken the magnetic induction intensity in the irrelevant direction.

[0045] Specifically,

[0046] (1) When the center point of the receiving coil is located at the center of coil No. 1, coil No. 3, coil No. 7, and coil No. 9, only inverter No. 1 needs to be turned on and the corresponding disconnect or short-circuit switch needs to be opened;

[0047] (2) When the receiving coil is located at the center of coil No. 2 and coil No. 8, only inverter No. 2 needs to be turned on and the corresponding disconnect or short-circuit switch needs to be opened;

[0048] (3) When the receiving coil is located at the center of coil No. 4 and coil No. 6, only inverter No. 4 needs to be turned on and the corresponding disconnect or short-circuit switch needs to be opened;

[0049] (4) When the receiving coil is located at the center of the No. 5 transmitting coil 5, only the No. 2 inverter needs to be turned on;

[0050] (5) When the receiving coil is located between the two coils, the corresponding inverters of the two connected coils are turned on to achieve the corresponding operation;

[0051] (6) When the receiving coil is located on the diagonal line of adjacent coils, the four adjacent transmitting coils on the diagonal line are turned on.

[0052] The switching method of the array coupler control structure of the above-mentioned array wireless power transmission system is: according to the difference between the transmitting coils before and after the switching, the opening and closing states of the inverter, main switch, disconnect series switch, and short-circuit jumper switch of the corresponding transmitting coil are adjusted. When switching the transmitting coil on the same control structure, the inverter on the corresponding control structure must be turned off first, and then the switch operation is performed, and finally the inverter on the corresponding control structure is turned on.

[0053] The specific switching examples are as follows:

[0054] (1) Any single-coil coupler power supply working mode and switching method

[0055] Take the single coil working mode and switching method of coil 1 and coil 3 as an example: first open the short-circuit jumper switch 1-1-2 corresponding to coil 1, and close the disconnect series switch 1-1-1. At the same time, the short-circuit jumper switches 1-3-2, 1-7-2, and 1-9-2 of other branches corresponding to inverter 1 are all in the closed state, and the switch k1 corresponding to the main circuit of inverter 1 is closed. At this time, coil 1 is in the working state.

[0056] Switching of a single coil: Take the switching of the working mode of coil 1 to the working mode of coil 3 as an example. Turn off inverter 1, disconnect the disconnecting series switch 1-1-1, close the short-circuit jumper switch 1-1-2, and open the short-circuit jumper switch 1-3-2 corresponding to coil 3, and close the disconnecting series switch 1-3-1 corresponding to coil 3. The other switches remain unchanged. After the switch switching is completed, turn on inverter 1 again to prevent the impact current from damaging the inverter.

[0057] (2) Power supply working mode and switching method of any adjacent double-coil coupler

[0058] Take the dual-coil working mode and switching method of coil 1 and coil 2 as an example. First, open the short-circuit jumper switch 1-1-2 corresponding to coil 1, and close the disconnect series switch 1-1-1. At the same time, the short-circuit jumper switches 1-3-2, 1-7-2, and 1-9-2 of other branches corresponding to inverter 1 are all in a closed state. Finally, close switch 1 corresponding to the main circuit of inverter 1. At this time, it is the working state of coil 1. Then open the short-circuit jumper switch 3-2-2 corresponding to coil 2, close the disconnect series switch 3-2-1, and close the switch k3 corresponding to the main circuit of inverter 3. At the same time, the short-circuit jumper switches 3-2-2 and 3-8-2 of other branches corresponding to inverter 3 are all in a closed state. At this time, it is the working state of coil 2. In this way, the dual-coil working mode of coil 1 and coil 2 is realized.

[0059] The switching of the dual coils: Take the switching of the working mode of coils 1 and 2 to the working mode of coils 1 and 4 as an example: turn off inverter 3 and turn on inverter 4. Turn on the short-circuit jumper switch 4-4-2 corresponding to coil 4, close the disconnect series switch 4-4-1, and finally turn on the main circuit switch k4 corresponding to inverter 4. The circuit state corresponding to inverter 1 remains unchanged, and the switching of the dual coil working mode can be realized.

[0060] (3) Power supply working mode and switching method of any adjacent dual-coil coupler

[0061] Take the four-coil working mode and switching method of coil 1, coil 2, coil 4, and coil 5 as an example: first, open the short-circuit jumper switch 1-1-2 corresponding to coil 1, and close the disconnecting series switch 1-1-1. At the same time, the short-circuit jumper switches 1-3-2, 1-7-2, and 1-9-2 of other branches corresponding to inverter 1 are all in a closed state. Finally, close the switch K1 corresponding to the main circuit of inverter 1. At this time, it is the working state of coil 1. Open the short-circuit jumper switch 3-2-2 corresponding to coil 2, close the disconnecting series switch 3-2-1, and close the switch 3 corresponding to the main circuit of inverter 3. At the same time, the short-circuit jumper switches 3-2-2 and 3-8-2 of other branches corresponding to inverter 3 are all in a closed state. At this time, it is the working state of coil 2. Open the short-circuit jumper switch 4-4-2 corresponding to coil 4, close the disconnecting series switch 4-4-1, and close the switch K4 corresponding to the main circuit of inverter 4. At the same time, the short-circuit jumper switches of other branches corresponding to the inverter 4 are all in the closed state. At this time, the coil 4 is in the working state. The short-circuit jumper switch 2-5-2 corresponding to the coil 5 is opened, the disconnection series switch 2-5-1 is closed, and the switch k2 corresponding to the main circuit of the inverter 2 is closed. At this time, the coil 5 is in the working state. Thus, the four-coil working mode of coil 1, coil 2, coil 4, and coil 5 is realized.

[0062] Switching of four coils: Take the switching of the working mode of coils 1, 2, 4, 5 to the working mode of coils 2, 3, 5, 6 as an example. The state corresponding to coil 3 on inverter No. 3 remains unchanged. The state corresponding to coil 5 on inverter No. 2 remains unchanged. After turning off inverter 1 and switching the switch in a very short time, turn on inverter 1. Turn on the short-circuit jumper switch 1-3-2 corresponding to coil 3, and close the disconnecting series switch 1-3-1. Close the short-circuit jumper switch 1-1-2 corresponding to coil 1, open the short-circuit connection switch corresponding to coil 1, and finally turn on the main circuit switch K1 corresponding to inverter 1. Turn off inverter 4 and switch the switch, and then turn on inverter 4. Open the short-circuit jumper switch 4-6-2 corresponding to coil 6, and close the disconnecting series switch 4-6-1. Close the short-circuit jumper switch 4-4-2 corresponding to coil 6, open the short-circuit connection switch 4-4-1 corresponding to coil 4, and finally turn on the main circuit switch K4 corresponding to inverter 4. The circuit state corresponding to the inverter 1 remains unchanged, and the switching of the four-coil working mode can be achieved.

[0063] Please refer to Figure 9-11 The inverter working mode can be selected by placing the coils in different positions (the position can be determined by the change of the mutual inductance curve under different working modes), and the switching working conditions of a single inverter, two inverters, and four inverters can be selected. This shows that the change of mutual inductance between coils can be minimized under different working modes, thereby preventing the efficiency drop phenomenon.

[0064] This patent proposes a control logic for the transmitting coil of an array-type multi-transmitter wireless power transmission system. When the receiving coil moves to the area above the transmitting coil, the corresponding transmitting coil unit is turned on to achieve energy transmission and improve the overall anti-offset performance. This can reduce the overlapping area between coil windings and reduce the spatial position, and can achieve seamless splicing of multiple transmitting coils, reduce leakage inductance between coils, and improve the transmission efficiency between the transceiver systems.

[0065] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the structural relationship and principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A control method for an array coupler control structure of an array wireless power transmission system, characterized in that : It includes a combination of opening and closing of the disconnecting series switch and the short-circuit jumper switch to realize the power supply control method of any single coil coupler in the 9 coils, the power supply control method of any adjacent double coil coupler and the power supply control method of any adjacent four coil coupler; The array coupler control structure of the array wireless power transmission system involved in the control method includes a control structure No. 1, a control structure No. 2, a control structure No. 3 and a control structure No. 4; the control structure No. 1 controls four non-adjacent transmitting coils in the array transmitting coil structure; the control structure No. 2 controls a transmitting coil located in the center of the array transmitting coil structure; the control structure No. 3 controls two non-adjacent transmitting coils among the remaining four transmitting coils in the array transmitting coil structure; and the control structure No. 4 controls the remaining two transmitting coils; The array-type transmitting coil structure comprises a transmitting coil No. 1, a transmitting coil No. 2, a transmitting coil No. 3, a transmitting coil No. 4, a transmitting coil No. 5, a transmitting coil No. 6, a transmitting coil No. 7, a transmitting coil No. 8 and a transmitting coil No. 9, and the transmitting coils are arranged in the order of the coil numbers in the shape of "N". The control structure No. 1 includes an inverter No. 1, a main switch No. 1 K1 connected in series with the inverter No. 1, and a disconnecting series switch and a short-circuit jumper switch respectively configured on the transmitting coil No. 1, the transmitting coil No. 3, the transmitting coil No. 7, and the transmitting coil No. 9; the control structure No. 1 and the transmitting coil No. 1, the transmitting coil No. 3, the transmitting coil No. 7, and the transmitting coil No. 9 form a control loop; The second control structure includes a second inverter, a second main switch K2 connected in series with the second inverter, and a disconnecting series switch and a short-circuit jumper switch configured on the fifth transmitting coil; the second control structure and the fifth transmitting coil form a control loop; The No. 3 control structure includes a No. 3 inverter, a No. 3 main switch K3 connected in series with the No. 3 inverter, and a disconnecting series switch and a short-circuit jumper switch respectively configured on the No. 2 transmitting coil and the No. 8 transmitting coil; the No. 3 control structure and the No. 2 transmitting coil and the No. 8 transmitting coil form a control loop; The No. 4 control structure includes a No. 4 inverter, a No. 4 main switch K4 connected in series with the No. 4 inverter, and a disconnecting series switch and a short-circuit jumper switch respectively configured on the No. 4 transmitting coil and the No. 6 transmitting coil. The No. 4 control structure and the No. 4 transmitting coil and the No. 6 transmitting coil form a control loop.

2. The control method of the array coupler control structure of the array wireless power transmission system according to claim 1, characterized in that: The control structure No. 1, the control structure No. 2, the control structure No. 3 and the control structure No. 4 all control the coils corresponding to their respective controls through an inverter, a short-circuit jumper switch and a disconnect series switch.

3. The control method of the array coupler control structure of the array wireless power transmission system according to claim 1, characterized in that The power supply control method for the arbitrary single-coil coupler is as follows: when the center position of the receiving coil is at the center of the single transmitting coil, the inverter of the control structure where the single transmitting coil is located is turned on, and then the short-circuit jumper switch configured for the single transmitting coil is turned on and the disconnection series switch configured for the single transmitting coil is closed, while keeping other short-circuit jumper switches on the control structure where the single transmitting coil is located in a closed state, closing the main switch on the control structure where the single transmitting coil is located, and turning on the power supply to the single transmitting coil.

4. The control method of the array coupler control structure of the array wireless power transmission system according to claim 1, characterized in that The power supply control method for any adjacent double-coil coupler is as follows: when the receiving coil performs linear motion within the range of two adjacent transmitting coils, the inverter of the control structure where the two adjacent transmitting coils are located is turned on, and then the short-circuit jumper switch configured for the two adjacent transmitting coils is turned on and the disconnection series switch configured for the two adjacent transmitting coils is closed, while keeping other short-circuit jumper switches on the control structure where the two adjacent transmitting coils are located in a closed state, closing the main switch on the control structure where the two adjacent transmitting coils are located, and turning on power supply to the two adjacent transmitting coils; the two adjacent transmitting coils are controlled by independent inverters, so that the current phase of the coupler array is conveniently adjusted by the inverter to realize the orientation of the magnetic field, strengthen the magnetic induction intensity in a predetermined direction, and weaken the magnetic induction intensity in an irrelevant direction.

5. The control method of the array coupler control structure of the array wireless power transmission system according to claim 1, characterized in that: The power supply control method for any adjacent four-coil coupler is as follows: when the receiving coil performs linear motion within the range of four adjacent transmitting coils, the inverter of the control structure where the four adjacent transmitting coils are located is turned on, and then the short-circuit jumper switch configured for each of the four adjacent transmitting coils is turned on and the disconnection series switch configured for each of the two adjacent transmitting coils is selectively closed, while keeping other short-circuit jumper switches on the control structure where the four adjacent transmitting coils are located in a closed state, closing the main switch on the control structure where the four adjacent transmitting coils are located, and turning on power supply to the four adjacent transmitting coils; the four adjacent transmitting coils are all controlled by independent inverters, so that the current phase of the coupler array is conveniently adjusted by the inverter to realize the orientation of the magnetic field, adjust the direction of the magnetic field, strengthen the magnetic induction intensity in the predetermined direction, and weaken the magnetic induction intensity in irrelevant directions.

6. The control method of the array coupler control structure of the array wireless power transmission system according to claim 1, characterized in that: According to the difference between the transmitting coils before and after the switching, adjust the opening and closing states of the inverter, main switch, disconnect series switch, and short-circuit jumper switch of the corresponding transmitting coil. When switching the transmitting coil on the same control structure, it is necessary to first turn off the inverter on the corresponding control structure, then perform the switch operation, and finally turn on the inverter on the corresponding control structure.

Images