A WPT active variable pitch system based on heterogeneous frequency nesting

Abstract

The present invention discloses a WPT active pitch-changing system based on hetero-frequency nesting, the system includes a WPT main subsystem, a torque-changing subsystem and a system controller; the WPT main subsystem includes an excitation source A, a main WPT and a post-stage conversion A connected in sequence, the main WPT includes a transmitting coil A and a receiving coil A; the torque-changing subsystem includes an excitation source B, a torque-changing WPT and a phase control unit connected in sequence, the input end of the excitation source B is connected to a power supply as the input end of the torque-changing subsystem, the output end of the phase control unit is connected to a load B as the output end of the torque-changing subsystem, and the torque-changing WPT includes a transmitting coil B and a receiving coil B. By fixing the transmitting coil A and the transmitting coil B on the same plane in an inside-outside nesting scheme to form a primary side hetero-frequency nested coil, and fixing the receiving coil A and the receiving coil B on another plane in an inside-outside nesting scheme to form a secondary side hetero-frequency nested coil, a new idea can be provided for flexible pitch-changing of wireless power transmission.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless power transmission (WPT), and in particular relates to a WPT active variable distance system based on heterofrequency nesting. Background Art

[0002] Wireless power transmission is widely used, and the transmission distance is crucial to the efficiency of wireless power transmission. If the transmission distance can be flexibly changed, it will help optimize the efficiency of wireless power transmission. When the frequency of wireless power transmission is different, the desired transmission distance is also different in order to obtain the maximum transmission efficiency. Therefore, it is urgent to solve the problem of not being able to dynamically adjust the transmission distance based on the different frequencies of wireless power transmission. Summary of the invention

[0003] The present invention provides a WPT active variable distance system based on heterogeneous frequency nesting, which is used to solve the technical problem that the transmission distance cannot be dynamically adjusted based on the different frequencies of wireless power transmission.

[0004] The present invention provides a WPT active variable pitch system based on heterofrequency nesting, comprising a WPT main subsystem, a torque conversion subsystem and a system controller, wherein the torque conversion subsystem is connected in parallel with the WPT main subsystem, and the resonance frequencies of the torque conversion subsystem and the WPT main subsystem are different;

[0005] The WPT main subsystem includes an excitation source A, a main WPT and a subsequent conversion A connected in sequence. The input end of the excitation source A is connected to the power supply as the input end of the WPT main subsystem. The output end of the subsequent conversion A is connected to the load A as the output end of the WPT main subsystem. The main WPT includes a transmitting coil A and a receiving coil A. The resonant frequency of the main WPT is ;

[0006] The torque conversion subsystem includes an excitation source B, a torque conversion WPT and a phase control unit connected in sequence. The input end of the excitation source B is connected to the power supply as the input end of the torque conversion subsystem, and the output end of the phase control unit is connected to the load B as the output end of the torque conversion subsystem. The torque conversion WPT includes a transmitting coil B and a receiving coil B. The resonant frequency of the torque conversion WPT is , ;

[0007] The transmitting coil A and the transmitting coil B are fixed on the same plane in an inner and outer nesting scheme. The receiving coil A and the receiving coil B are fixed on another plane in an inner and outer nesting scheme. The secondary side heterodyne coils are formed; a feasible solution for the primary side heterodyne coils is: the inner loop has a frequency of The transmitting coil A, the outer loop is the frequency The transmitting coil B; a feasible solution for the secondary side frequency nested coil is: the inner loop has a frequency of The receiving coil A, the outer loop is the frequency The receiving coil B; vice versa is also possible, which is determined by the actual application needs;

[0008] The phase control unit is used to adjust the current of the receiving coil B according to the current of the receiving coil B. The current to the transmitting coil B The phase tracking control of , where for and The phase difference, is the current of the transmitting coil B, is the current of receiving coil B, for The current size; through By controlling the WPT main subsystem, the force F between the transmitting coil B and the receiving coil B is changed, thereby changing the transmission distance d between the primary side hetero-frequency nested coil and the secondary side hetero-frequency nested coil, so as to optimize the transmission distance of the WPT main subsystem.

[0009] In some embodiments of the present invention, the system controller includes a WPT main subsystem controller coupled to the WPT main subsystem, and a torque converter subsystem controller coupled to the torque converter subsystem;

[0010] The WPT main subsystem controller is used to control the WPT main subsystem, and the torque conversion subsystem controller is used to control the torque conversion subsystem to complete the variable distance task according to the requirements of the WPT main subsystem.

[0011] In some embodiments of the present invention, when the WPT master subsystem controller is in the first working condition where the WPT master subsystem controller is the main working condition, the WPT master subsystem is tasked with wireless power transmission, and the torque converter subsystem is tasked with wireless power transmission and another task is to adjust the transmission distance d, wherein in the first working condition, the WPT master subsystem is the master subsystem, and the torque converter subsystem is the slave subsystem;

[0012] In the first working condition, the adjustment of the transmission distance d specifically includes:

[0013] In the first adjustment situation, the transmitting coil A and the transmitting coil B are set to form primary side heterogeneous frequency nested coils in the same plane. , the receiving coil A and the receiving coil B form a secondary side frequency nested coil on the same plane ; By fixing the transmitting coil A and the transmitting coil B on the same plane and the receiving coil A and the transmitting coil B on another plane, when the force between the transmitting coil B and the receiving coil B changes, the transmission distance d between the transmitting coil B and the receiving coil B, and between the transmitting coil A and the receiving coil A is changed synchronously;

[0014] In the second adjustment situation, the transmission distance between the transmitting coil A and the receiving coil A is not fixed, while the transmission distance between the transmitting coil B and the receiving coil B is fixed. When the force between the transmitting coil B and the receiving coil B changes, the transmission distance d between the transmitting coil A and the receiving coil A changes synchronously.

[0015] In some embodiments of the present invention, in the second adjustment situation, setting the transmission distance between the transmitting coil A and the receiving coil A to be not fixed, while setting the transmission distance between the transmitting coil B and the receiving coil B to be fixed includes:

[0016] Fix the transmitting coil A and transmitting coil B on the same plane The primary side heterodyne coil is formed, and the receiving coil A is in the plane , the receiving coil B is in the plane , and The distance between and is not fixed, but and The distance between and fixed; or

[0017] The receiving coil A and the transmitting coil B are fixed on the same plane. The secondary side heterodyne coils are formed, and the transmitting coil A is in the plane , the transmitting coil B is in the plane , The distance from S1 is and is not fixed, but and The distance between And fixed.

[0018] In some embodiments of the present invention, when the WPT main subsystem controller and the torque conversion subsystem controller are in the second working condition of mutual master-slave operation, the main WPT in the WPT main subsystem is changed to a main / auxiliary WPT-A, and the rear-stage transformation A is changed to a phase control unit A, to obtain a WPT main / auxiliary subsystem A;

[0019] The torque conversion WPT of the torque conversion subsystem is changed into a main / auxiliary WPT-B, and the phase control unit is changed into a phase control unit B, to obtain a WPT main / auxiliary subsystem B;

[0020] The transmitting coil A and the transmitting coil B are fixed on the same plane in an inner and outer nesting scheme. The receiving coil A and the receiving coil B are fixed on another plane in an inner and outer nesting scheme. This constitutes a secondary side heterodyne coil.

[0021] In some embodiments of the present invention, the WPT main / auxiliary subsystem A is the main subsystem, and the main / auxiliary system controller A is the main subcontroller: the task of the WPT main / auxiliary subsystem A is to perform wireless power transmission, and the task of the WPT main / auxiliary subsystem B is to adjust the transmission distance d. When the WPT main / auxiliary subsystem A requires correction of the transmission distance d, the main / auxiliary system controller A sends a distance instruction to the main / auxiliary system controller B to control the main / auxiliary system controller B to provide a variable distance service;

[0022] When the WPT main / auxiliary subsystem B is the main subsystem and the main / auxiliary system controller B is the main subcontroller: the task of the WPT main / auxiliary subsystem B is to perform wireless power transmission, and the task of the WPT main / auxiliary subsystem A is to adjust the transmission distance. When the WPT main / auxiliary subsystem B requires correction of the transmission distance d, the main / auxiliary system controller B sends a distance instruction to the main / auxiliary system controller A to control the main / auxiliary system controller A to provide variable distance service.

[0023] In summary, the system of the present application sets the specific structure of the WPT main subsystem and the torque conversion subsystem, and fixes the transmitting coil A and the transmitting coil B on the same plane in an inner and outer nesting scheme. The primary side heterogeneous frequency nested coils are formed, and the receiving coils A and B are fixed on another plane in an inside-outside nesting scheme. The secondary side heterogeneous nested coils are formed, and the force generated by the magnetic field of the heterogeneous nested transmitting coil and receiving coil is used to resist gravity or other forces to achieve active pitch change, providing a new idea for flexible pitch change of wireless power transmission. The WPT active pitch change system based on heterogeneous nesting has a simple and reliable circuit structure and a novel control scheme. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is the structural block diagram of the WPT active variable pitch system based on heterogeneous frequency nesting;

[0026] Figure 2 This is a control structure block diagram of the system of the present invention;

[0027] Figure 3 This is the control block diagram of the WPT main subsystem;

[0028] Figure 4 This is the control block diagram of the torque converter subsystem;

[0029] Figure 5 for and System block diagram under relatively independent coil structure;

[0030] Figure 6 The structural block diagram of the WPT active variable pitch system based on frequency nesting with mutual master and slave;

[0031] Figure 7 The structure block diagram of the system controller of the WPT active variable pitch system based on heterogeneous frequency nesting is shown in FIG. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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] See also Figure 1 , which shows the structural block diagram of the WPT active variable pitch system based on hetero-frequency nesting of the present application. The WPT active variable pitch system based on hetero-frequency nesting includes a WPT main subsystem, a torque conversion subsystem and a system controller, and the torque conversion subsystem is connected in parallel with the WPT main subsystem. The WPT main subsystem and the torque conversion subsystem have their own excitation sources and their respective resonant frequencies are different to avoid mutual interference, especially magnetic interference.

[0034] The WPT main subsystem includes an excitation source A, a main WPT, and a subsequent converter A connected in sequence. The main WPT includes a transmitting coil A and a receiving coil A. If necessary, a relay coil can be added. The resonant frequency of the main WPT is ;

[0035] The torque conversion subsystem includes an excitation source B, a torque conversion WPT and a phase control unit connected in sequence. The torque conversion WPT includes a transmitting coil B and a receiving coil B. If necessary, a relay coil can be added. The resonant frequency of the torque conversion WPT is , .

[0036] Transmitting coil A and transmitting coil B adopt an internal and external nesting scheme to form a primary side heterogeneous frequency nested coil and are located in the plane , resonant frequency The transmitting coil A is an outer loop and the resonant frequency The transmitting coil B is the inner loop, or vice versa, depending on actual needs.

[0037] The receiving coil B and the transmitting coil B form a secondary side frequency nested coil and are located in the plane ,Since the WPT main subsystem and the torque converter subsystem have different resonant frequencies, mutual interference, especially magnetic interference, can be avoided.

[0038] The receiving coil A and the receiving coil B adopt an inner and outer nesting scheme to form a secondary side heterogeneous nested coil and are located in the plane , the receiving coil of the main WPT is the outer loop and the receiving coil of the torque-converting WPT is the inner loop.

[0039] The subsequent transformation A meets the load requirements.

[0040] The phase control unit realizes the receiving coil B current and the transmitting coil B current For the phase tracking control of the torque-converting WPT, the parallel-parallel topology with large transmitting coil current is preferred.

[0041] The system controller controls the entire system.

[0042] The system has two types of working conditions, namely, working condition 1: the WPT main subsystem controller is the main work, the main task of the WPT main subsystem is to perform wireless power transmission, and the torque converter subsystem, in addition to wireless power transmission, has the main task of adjusting the transmission distance d.

[0043] Working condition 2: The WPT main subsystem controller and the torque conversion subsystem controller work as master and slave to each other. One WPT subsystem is responsible for pitch change, and the other WPT subsystem meets the load demand. The working tasks of the two WPT main subsystems and the torque conversion subsystem can be interchanged. Under this working condition, the WPT main subsystem and the torque conversion subsystem are mutually master and slave, and the system is improved to a WPT active pitch change system based on heterogeneous frequency nesting.

[0044] Figure 2 This is a block diagram of the system control structure of the present invention.

[0045] The system controller controls the entire system, including two relatively independent WPT main subsystem controllers and torque conversion subsystem controllers. The WPT main subsystem controller implements control of the WPT main subsystem, while the torque conversion subsystem controller implements control of the torque conversion subsystem. The system controller adopts master-slave control. According to work needs, the WPT main subsystem controller is used as the master, or the WPT main subsystem controller and the torque conversion subsystem controller are mutually master-slave.

[0046] When the WPT main subsystem controller is the main subcontroller: the main task of the WPT main subsystem is to perform wireless power transmission, the main task of the torque conversion subsystem is to adjust the transmission distance d, and the torque conversion subsystem provides variable distance service for the WPT main subsystem. When the WPT main subsystem requires correction of the transmission distance d, the WPT main subsystem controller sends a distance instruction dm to the torque conversion subsystem controller to control the torque conversion subsystem to provide variable distance service.

[0047] When the WPT main subsystem controller and the torque conversion subsystem controller are mutually master-slave subcontrollers: when any subsystem in the WPT main subsystem and the torque conversion subsystem requires correction of the transmission distance d, the subsystem controller issues an instruction to the other subsystem controller to control the other WPT subsystem to provide variable distance service; at this time, both the WPT main subsystem and the torque conversion subsystem have variable distance capability. This scheme corresponds to a WPT active variable distance system based on heterogeneous frequency nesting that is mutually master-slave.

[0048] Figure 3-Figure 5 In the description, the working condition 1 WPT main subsystem controller is taken as the main subcontroller as an example.

[0049] Figure 3 This is the control block diagram of the WPT main subsystem.

[0050] When the system works in working condition 1, when the WPT main subsystem controller is the main subcontroller, when the transmission distance d does not meet the needs of the WPT main subsystem, the WPT main subsystem controller sends a transmission distance d instruction to the torque converter subsystem controller. The main task of the WPT main subsystem is to perform wireless power transmission and does not have the ability to change distance. The function of the WPT main subsystem controller: command subsystem control B to meet the transmission distance requirement dm of the WPT main subsystem, and control the subsequent transformation A to meet the needs of load A.

[0051] Supplementary explanation: In some specific applications, subsystem control A does not need to directly specify the transmission distance requirement dm, such as how many centimeters, but only needs to be able to determine whether the transmission distance requirement is met. If it is too far, it will give instructions to shorten the transmission distance; if it is too close, it will give instructions to lengthen the transmission distance. Example: For example, the WPT main subsystem obtains the maximum transmission efficiency The transmission distance is required to be dm, but there is no need to calculate the specific dm value. It is only necessary to determine whether the maximum transmission efficiency is achieved under the current transmission distance d. , and give corresponding instructions to increase or decrease the transmission distance.

[0052] Figure 4 This is the control block diagram of the torque converter subsystem.

[0053] When the system works in working condition 1, the torque converter subsystem controller receives the transmission distance instruction from the WPT main subsystem controller. The main task of the torque converter subsystem is to adjust the transmission distance to meet the transmission distance requirements of the WPT subsystem. The magnetic field size is determined by the current, and the control of the transmission distance is achieved by controlling the current.

[0054] The torque converter subsystem controller collects the current of the transmitting coil B The current of the receiving coil B , implement The size and phase of are controlled to change the force f between the transmitting coil B and the receiving coil, thereby changing the transmission distance d.

[0055] As an alternative, permanent magnets are added to both the transmitting and receiving sides of the torque converter subsystem to provide a magnetic force F. This magnetic force is of a DC nature and does not need to consider the frequency properties but will change with the change of the transmission distance d; the other structures of the torque converter subsystem remain unchanged.

[0056] The transmission distance d controls the selection of one of the two schemes in practical applications.

[0057] Embodiment 1: The transmitting coils of the WPT main subsystem and the torque converter subsystem are in the same plane, while the receiving coils of the WPT main subsystem and the torque converter subsystem are in the same plane. Either the WPT main subsystem controller or the torque converter subsystem controller can sample the transmission distance d without performing two sets of transmission distance sampling. The WPT main subsystem controller is preferred for sampling. Since the transmitting coils A and B of the WPT main subsystem and the torque converter subsystem are fixed in the same plane and the receiving coils A and B are fixed in another plane, the transmission distance d between the transmitting coil A and the receiving coil A is changed at the same time.

[0058] Figure 5 for and System block diagram under relatively independent coil structure.

[0059] When the system is working in working condition 1, Example 2: The distance d1 between the transmitting coils A and B can be changed, while the distance between the receiving coils A and B can be changed. The system with a fixed coil structure is similar to that of Example 1, except that and Relatively independent, other unchanged, there are two types of structures:

[0060] Figure 5 (a) is the first type of structure, where the transmitting coil B is fixed on the same plane. The primary side heterodyne coil is formed, and the receiving coil A is in the plane , the receiving coil B is in the plane , and The distance between ,and and The distance between ;

[0061] Figure 5 (b) is the second type of structure, where the receiving coil A and the transmitting coil B are fixed on the same plane. The secondary side heterodyne coils are formed, and the transmitting coil A is in the plane , the transmitting coil B is in the plane , The distance from S1 is ,and and The distance between ;

[0062] When the force between the transmitting coil B and the receiving coil B increases, the distance between the transmitting coil A and the receiving coil A can be increased regardless of the structure. Expand to implement variable pitch control.

[0063] and Relatively independent, the WPT main subsystem controller needs to sample the transmission distance d.

[0064] The second embodiment is characterized in that: the transmission distance of the torque converter subsystem Independent, designed to smaller, so when When enlarged, The synchronous pitch change is no longer the same as in Example 1, the change is smaller, and the current of the transmitting and receiving coils of the torque conversion subsystem does not need to be increased too much.

[0065] Figure 6 The structural block diagram of the WPT active variable pitch system based on frequency nesting with mutual master and slave;

[0066] When the system works in working condition 2: according to actual application, the system is improved to a WPT active variable pitch system based on hetero-frequency nesting with mutual master-slave, the main WPT is changed to main / auxiliary WPT-A, and the rear-stage conversion A is changed to phase control unit A. At this time, the WPT main subsystem is correspondingly transformed into WPT main / auxiliary subsystem A; the torque conversion WPT is changed to main / auxiliary WPT-B, and the phase control unit is changed to phase control unit B. At this time, the torque conversion subsystem is correspondingly transformed into WPT main / auxiliary subsystem B; other structures remain unchanged; the WPT main subsystem controller and the torque conversion subsystem controller are mutually master-slave subcontrollers: when any subsystem of the WPT main / auxiliary subsystem A and the WPT main / auxiliary subsystem B requires correction of the transmission distance d, the subsystem controller sends an instruction to the other subsystem controller to control the other WPT subsystem to provide variable pitch service; both phase control unit A and phase control unit B have the ability to control phase and meet load requirements; the WPT main subsystem and the torque conversion subsystem have the ability to change pitch, then the entire system is improved to a WPT active variable pitch system based on hetero-frequency nesting with mutual master-slave. When the WPT main / auxiliary subsystem A completes the system task, the WPT main / auxiliary subsystem B completes the distance changing task according to the requirements of the WPT main / auxiliary subsystem A; vice versa; the WPT main / auxiliary subsystem A and the WPT main / auxiliary subsystem B can realize mutual function switching.

[0067] With this structure, both the WPT main / auxiliary subsystem A and the WPT main / auxiliary subsystem B can realize active adjustment of the transmission distance d. One of the WPT main / auxiliary subsystem A and the WPT main / auxiliary subsystem B must be the main subsystem and the other subsystem must be the auxiliary subsystem. Moreover, the functions of the WPT main / auxiliary subsystem A and the WPT main / auxiliary subsystem B can be switched with each other to improve the flexibility of the system.

[0068] Figure 7 The system controller structure block diagram of the WPT active variable pitch system based on heterogeneous frequency nesting with mutual master and slave;

[0069] The system controller of the WPT active variable pitch system based on heterogeneous frequency nesting controls the entire system, including two relatively independent master / auxiliary system controllers A and B; the system controllers adopt mutual master-slave control, and the master / auxiliary system controller A or the master / auxiliary system controller B is selected as the master according to work needs, that is, the master / auxiliary system controller A and the master / auxiliary system controller B are mutually master-slave.

[0070] When the WPT main / auxiliary subsystem A is the main subsystem and the main / auxiliary system controller A is the main subcontroller: the task of the WPT main / auxiliary subsystem A is to perform wireless power transmission, and the task of the WPT main / auxiliary subsystem B is to adjust the transmission distance d. When the WPT main / auxiliary subsystem A requires correction of the transmission distance d, the main / auxiliary system controller A sends a distance instruction to the main / auxiliary system controller B to control the main / auxiliary system controller B to provide variable distance service;

[0071] When the WPT main / auxiliary subsystem B is the main subsystem and the main / auxiliary system controller B is the main subcontroller: the task of the WPT main / auxiliary subsystem B is to perform wireless power transmission, and the task of the WPT main / auxiliary subsystem A is to adjust the transmission distance. When the WPT main / auxiliary subsystem B requires correction of the transmission distance d, the main / auxiliary system controller B sends a distance instruction to the main / auxiliary system controller A to control the main / auxiliary system controller A to provide variable distance service.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A WPT active variable pitch system based on heterogeneous frequency nesting, characterized in that: It includes a WPT main subsystem, a torque conversion subsystem and a system controller, wherein the torque conversion subsystem is connected in parallel with the WPT main subsystem, and the resonance frequencies of the torque conversion subsystem and the WPT main subsystem are different; The WPT main subsystem includes an excitation source A, a main WPT and a subsequent conversion A connected in sequence. The input end of the excitation source A is connected to the power supply as the input end of the WPT main subsystem, and the output end of the subsequent conversion A is connected to the load A as the output end of the WPT main subsystem. The main WPT includes a transmitting coil A and a receiving coil A. The resonant frequency of the main WPT is f A ; The torque conversion subsystem includes an excitation source B, a torque conversion WPT and a phase control unit connected in sequence. The input end of the excitation source B is connected to the power supply as the input end of the torque conversion subsystem, and the output end of the phase control unit is connected to the load B as the output end of the torque conversion subsystem. The torque conversion WPT includes a transmitting coil B and a receiving coil B. The resonant frequency of the torque conversion WPT is f B , f A ≠f B ; The transmitting coil A and the transmitting coil B are fixed on the same plane S in an inner-outer nesting scheme. P The receiving coil A and the receiving coil B are fixed on another plane S in an inner and outer nesting scheme. D Constitute the secondary side heterodyne coil; The phase control unit is used to adjust the current i of the receiving coil B according to the current i B2 The current i of the transmitting coil B B Phase tracking control, that is, let i B2 = k∠θ, where θ is i B with i B2 The phase difference, i B is the current of the transmitting coil B, i B2 is the current of receiving coil B, k is i B2 The current size; through i B2 , changing the force F between the transmitting coil B and the receiving coil B, thereby changing the transmission distance d between the primary side hetero-frequency nested coil and the secondary side hetero-frequency nested coil, so as to optimize the transmission distance of the WPT main subsystem; Wherein, the system controller includes a WPT main subsystem controller connected to the WPT main subsystem and a torque converter subsystem controller connected to the torque converter subsystem; The WPT main subsystem controller is used to control the WPT main subsystem, and the torque conversion subsystem controller is used to control the torque conversion subsystem to complete the variable distance task according to the requirements of the WPT main subsystem; When the WPT master subsystem controller is in the first working condition where the WPT master subsystem controller is the main working condition, the WPT master subsystem is tasked with wireless power transmission, and the torque converter subsystem is tasked with wireless power transmission and adjusting the transmission distance d, wherein in the first working condition, the WPT master subsystem is the master subsystem, and the torque converter subsystem is the slave subsystem; In the first working condition, the adjustment of the transmission distance d specifically includes: In the first adjustment situation, the transmitting coil A and the transmitting coil B are set to form primary side heterogeneous frequency nested coils in the same plane S P The receiving coil A and the receiving coil B form a secondary side heterogeneous nested coil in the same plane S D ; By fixing the transmitting coil A and the transmitting coil B on the same plane and fixing the receiving coil A and the receiving coil B on another plane, when the force between the transmitting coil B and the receiving coil B changes, the transmission distance d between the transmitting coil B and the receiving coil B, and between the transmitting coil A and the receiving coil A is changed synchronously; In the second adjustment situation, the transmission distance between the transmitting coil A and the receiving coil A is not fixed, while the transmission distance between the transmitting coil B and the receiving coil B is fixed. When the force between the transmitting coil B and the receiving coil B changes, the transmission distance d between the transmitting coil A and the receiving coil A changes synchronously. In the second adjustment situation, the setting of the transmission distance between the transmitting coil A and the receiving coil A is not fixed, while the transmission distance between the transmitting coil B and the receiving coil B is fixed includes: Fix the transmitting coil A and transmitting coil B on the same plane S P The primary side heterodyne coils are formed, the receiving coil A is in plane S1, the receiving coil B is in plane S2, the distance between SP and S1 is d1 and is not fixed, and S P The distance d2 from S2 is fixed; or Receiving coil A and receiving coil B are fixed on the same plane S D The secondary side heterodyne coils are formed, with the transmitting coil A on plane S1 and the transmitting coil B on plane S2. D The distance between S1 and S1 is d1 and is not fixed. D The distance between S2 and S2 is d2 and is fixed.

2. A WPT active variable pitch system based on heterogeneous frequency nesting according to claim 1, characterized in that: When the WPT main subsystem controller and the torque conversion subsystem controller are in the second working condition where they work as a master and a slave to each other, the main WPT in the WPT main subsystem is changed to a main / auxiliary WPT-A, and the rear-stage transformation A is changed to a phase control unit A to obtain a WPT main / auxiliary subsystem A; The torque conversion WPT of the torque conversion subsystem is changed into a main / auxiliary WPT-B, and the phase control unit is changed into a phase control unit B, to obtain a WPT main / auxiliary subsystem B; The transmitting coil A and the transmitting coil B are fixed on the same plane S in an inner-outer nesting scheme. P The receiving coil A and the receiving coil B are fixed on another plane S in an inner and outer nesting scheme. D This constitutes a secondary side heterodyne coil.

3. A WPT active variable pitch system based on heterogeneous frequency nesting according to claim 2, characterized in that: When the WPT main / auxiliary subsystem A is the main subsystem and the main / auxiliary system controller A is the main subcontroller: the task of the WPT main / auxiliary subsystem A is to perform wireless power transmission, and the task of the WPT main / auxiliary subsystem B is to adjust the transmission distance d. When the WPT main / auxiliary subsystem A requires correction of the transmission distance d, the main / auxiliary system controller A sends a distance instruction to the main / auxiliary system controller B to control the main / auxiliary system controller B to provide a variable distance service; When the WPT main / auxiliary subsystem B is the main subsystem and the main / auxiliary system controller B is the main subcontroller: the task of the WPT main / auxiliary subsystem B is to perform wireless power transmission, and the task of the WPT main / auxiliary subsystem A is to adjust the transmission distance. When the WPT main / auxiliary subsystem B requires correction of the transmission distance d, the main / auxiliary system controller B sends a distance instruction to the main / auxiliary system controller A to control the main / auxiliary system controller A to provide variable distance service.

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