Parallel dynamic inductive coupling electric energy transmission system and method

Abstract

The application relates to a parallel dynamic inductive coupled power transmission system, which comprises a three-phase rectifier bridge and two parallel inductive coupled power transmission systems, the inductive coupled power transmission system comprising an energy transmitting part and an energy receiving part; the energy transmitting part comprising a full-bridge inverter circuit and an LCL resonant network connected in cascade with the full-bridge inverter circuit; the energy receiving part comprising an inductive power taking device, a reactive power compensation device and a power regulating unit, wherein the energy transmitting part and the energy receiving part are connected through power inductive tracks. In the application, one track provides most of the energy, and the other track dynamically adjusts the track current fluctuation caused by the input voltage in real time. The application solves the problem that the traditional wireless power supply system adjusts the duty ratio, the phase shift angle or increases a level of voltage regulating unit, thereby causing the efficiency to be reduced, and is suitable for the field of high-efficiency non-contact mobile power supply.

Description

Technical Field

[0001] This application relates to the field of dynamic wireless power supply technology, and in particular to a parallel dynamic inductive coupling power transmission system and method. Background Technology

[0002] Currently, inductive power transmission has been widely used in industrial fields such as goods transportation and flexible manufacturing. Since no physical contact is required during power transmission, it provides a convenient, safe, and efficient way to transmit power for industrial production and daily life, and will be increasingly used in various fields such as industrial production, biomedicine, and rail transportation.

[0003] Traditional fixed inductively coupled power transfer (ICP) systems utilize an inverter and an LC resonant network to generate a magnetic field with a fixed frequency variation on the primary side. On the secondary side, a fixed LC resonant power supply circuit and rectifier circuit convert the high-frequency magnetic field energy into DC power. In contrast, dynamic inductive power transfer (IPT) technology requires adjusting the output power on the primary side of the transmission system to maintain a constant track current and achieve a constant magnetic field energy output. Currently, in dynamic ITP systems based on LCL resonant circuits, the track output current is kept constant by changing the duty cycle or phase shift angle of the full-bridge inverter when the input voltage fluctuates. However, these voltage regulation methods lead to changes in the inverter output voltage pulse width, causing severe harmonic distortion of the output current and making soft switching prone to failure. Therefore, constructing a high-efficiency, constant-current output ITP system has significant engineering and market value. Summary of the Invention

[0004] Therefore, it is necessary to provide a parallel dynamic inductive coupling power transmission system and method with high power quality, high power, and constant primary-side output energy to address the above-mentioned technical problems.

[0005] This invention provides a parallel dynamic inductive coupling power transmission system, the system comprising:

[0006] The system includes: a three-phase rectifier bridge and two parallel inductively coupled power transmission systems. Each inductively coupled power transmission system includes an energy transmitter and an energy receiver. The energy transmitter includes a full-bridge inverter circuit and an LCL resonant network cascaded with the full-bridge inverter circuit. The energy receiver includes an inductive energy harvesting device, a reactive power compensation device, and a power regulation unit. The energy transmitter and the energy receiver are connected via an inductive power rail.

[0007] Furthermore, the full-bridge inverter circuit includes a main power full-bridge inverter and an auxiliary full-bridge inverter; wherein, a high-frequency AC square wave voltage is formed between the two output points of the main power full-bridge inverter and the auxiliary full-bridge inverter.

[0008] Furthermore, the LCL resonant network includes a first LCL resonant circuit connected to the output terminal of the main power full-bridge inverter, and a second LCL resonant circuit electrically connected to the output terminal of the auxiliary full-bridge inverter; wherein, a high-frequency sine wave is formed between the two output points of the first LCL resonant circuit and the two output points of the second LCL resonant circuit, and is loaded in the power induction track.

[0009] Furthermore, the power induction track includes a main power track and an auxiliary track, and the induction energy harvesting device includes a main power coil and an auxiliary coil; wherein the main power coil is located on the main power track, and the auxiliary coil is located on the auxiliary track.

[0010] Furthermore, the system also includes an electromagnetic energy control unit disposed on the power induction track. The electromagnetic energy control unit is used to calculate the corresponding current error within the control cycle based on the effective current values ​​of the main power track and the auxiliary track, and to generate a PWM signal to control the turn-on and turn-off of the auxiliary full-bridge inverter within the control cycle based on the triangular wave and the current error.

[0011] Furthermore, the electromagnetic energy control unit includes a first current transformer disposed on the main power track, a second current transformer disposed on the auxiliary track, two AC RMS value calculation modules respectively electrically connected to the first current transformer and the second current transformer, a PI controller electrically connected to the output terminal of the AC RMS value calculation module, a compensator electrically connected to the output terminal of the PI controller via a triangular sawtooth wave generator, and a PWM generator electrically connected to the output terminal of the compensator.

[0012] Furthermore, the control model of the electromagnetic energy control unit is as follows:

[0013]

[0014] Among them, I m I is the total average current of the electrically induced track. pM The effective value of the current in the main power rail, I pA T is the effective value of the current in the auxiliary track. c To control the cycle, T on T is the pulse width on-time of the inverter bridge, ω is the switching frequency of the auxiliary full-bridge inverter, and T is the pulse width on-time of the inverter bridge. con For control period T c The opening time of the inner auxiliary track, U dc L is the output voltage of the rectifier bridge after three-phase rectification. f1M L is the first main resonant inductor in the first LCL resonant circuit. f1A It is the first auxiliary resonant inductor in the second LCL resonant circuit.

[0015] Furthermore, the calculation model for the magnetic flux generated by the main power track through the j-th main power coil and auxiliary coil region is as follows:

[0016]

[0017] The calculation model for the magnetic flux generated by the auxiliary track through the j-th main power coil and the auxiliary coil region is as follows:

[0018]

[0019] Among them, L AH L AE L AG L AF L DE L DH L DF and L DG The length between the two magnetic flux points, and the number of turns N of the main power coil. m and auxiliary coil N A The number of turns is odd, r A r is the auxiliary coil spacing. M Main coil spacing, d L μ is the diameter of the main power coil, and μ0 is the permeability of air.

[0020] Furthermore, the total mutual inductance between the main power track coils is:

[0021]

[0022] The coil includes a main power coil and an auxiliary coil, M M The mutual inductance between the main track and the main coil, M MA The mutual inductance between the main track and the auxiliary coil, d CM Main power coil thickness, d CA For the thickness of the auxiliary coil, d M The thickness of the main power track.

[0023] Another embodiment of the present invention proposes a parallel dynamic inductive coupling power transmission method, the method comprising:

[0024] The three-phase mains power on the grid side is converted into stable DC power through a three-phase rectifier bridge, and the stable DC power is converted into high-frequency AC square wave voltage through a full-bridge inverter circuit.

[0025] The high-frequency AC square wave voltage is converted into a high-frequency sine wave through an LCL resonant network and loaded into an electric energy induction track to form a high-frequency sinusoidal alternating magnetic field.

[0026] An induction energy harvesting device made of coil is placed above the induction track. According to the principle of electromagnetic induction, the alternating magnetic field in the induction track induces an alternating voltage in the closed coil of the induction energy harvesting device. After passing through the reactive power compensation device, the voltage is output to the power regulation unit, and then outputs a stable DC power supply to the load.

[0027] The aforementioned parallel dynamic inductively coupled power transmission system includes a three-phase rectifier bridge and two parallel inductively coupled power transmission systems. Each inductively coupled power transmission system includes an energy transmitter and an energy receiver. The energy transmitter includes a full-bridge inverter circuit and an LCL resonant network cascaded with the full-bridge inverter circuit. The energy receiver includes an inductive energy harvesting device, a reactive power compensation device, and a power regulation unit. The energy transmitter and the energy receiver are connected via an inductive power track. Compared to existing technologies, in this invention, one track provides most of the energy, while the other track dynamically adjusts the track current fluctuations caused by the input voltage in real time. This solves the efficiency reduction problem caused by adjusting the duty cycle, phase shift angle, or adding a voltage regulation unit in traditional wireless power supply systems, making it suitable for high-efficiency contactless mobile power supply applications. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the parallel dynamic inductive coupling power transmission system provided in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the electromagnetic energy control unit in a parallel dynamic inductive coupling power transmission system provided in an embodiment of the present invention;

[0030] Figure 3 The current diagram of the power induction track in the parallel dynamic inductive coupling power transmission system provided in this embodiment of the invention is as follows:

[0031] Figure 4 for Figure 1 Schematic diagram of the structure of the induction energy harvesting device;

[0032] Figure 5 for Figure 4 Cross-sectional view along the length direction;

[0033] Figure 6 This is a schematic flowchart of a parallel dynamic inductive coupling power transmission method provided in an embodiment of the present invention. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] It should be noted that the step numbers in this document are only for the convenience of explaining the specific embodiments and are not intended to limit the order in which the steps are executed. The method provided in this embodiment can be executed by a relevant server, and the following description will use a server as the execution subject.

[0036] like Figure 1 As shown in the embodiment of the present invention, a parallel dynamic inductively coupled power transmission system includes: a three-phase rectifier bridge located on the grid side and two parallel inductively coupled power transmission systems. In these two parallel inductively coupled power transmission systems, one system is responsible for most of the power output, providing the main energy to the load; the other system ensures that the magnetic field energy provided in the power induction track remains constant when the input voltage fluctuates or the load fluctuates drastically, thus ensuring a constant output power to the load. That is, the two parallel inductively coupled power transmission systems are divided into a main power section and an auxiliary section.

[0037] The inductively coupled power transmission system includes an energy transmitter and an energy receiver.

[0038] The energy transmitting unit includes a full-bridge inverter circuit and an LCL resonant network cascaded with the full-bridge inverter circuit. The energy receiving unit includes an inductive energy harvesting device, a reactive power compensation device, and a power regulation unit. The energy transmitting unit and the energy receiving unit are connected via an inductive power rail, and the output terminal of the power regulation unit is connected to the load.

[0039] Furthermore, the full-bridge inverter circuit includes a main power full-bridge inverter and an auxiliary full-bridge inverter. That is, the energy emission section includes an energy emission section corresponding to the main power section and an energy emission section corresponding to the auxiliary section. In the main power section, the full-bridge inverter circuit of the energy emission section includes a main power full-bridge inverter, and the LCL resonant network includes a first LCL resonant circuit connected to the output terminal of the main power full-bridge inverter. In the auxiliary section, the full-bridge inverter circuit of the energy emission section includes an auxiliary full-bridge inverter, and the LCL resonant network includes a second LCL resonant circuit connected to the output terminal of the auxiliary full-bridge inverter. A high-frequency AC square wave voltage is formed between the two output points of the auxiliary full-bridge inverter and the two output points of the main power full-bridge inverter. A high-frequency sine wave is formed between the two output points of the first LCL resonant circuit and the two output points of the second LCL resonant circuit, and is applied to the energy induction rail.

[0040] Specifically, the first LCL resonant circuit includes a first main resonant inductor L. f1M , and the first main resonant inductor L f1M The second main resonant inductor L in series f2M and the first main resonant capacitor C fM and the second main resonant inductor L f2M The main capacitor C in series pM The second LCL resonant circuit has a first auxiliary resonant inductor L. f1A , and the first auxiliary resonant inductor L f1A The second auxiliary resonant inductor L in series f2A and the first auxiliary resonant capacitor C pA and the second auxiliary resonant inductor L f2A Series auxiliary capacitor C pA .

[0041] Understandably, the entire system operation process of this invention is as follows:

[0042] Energy emission section: After the three-phase 380V mains power is input from the grid side, a stable DC power is formed between the DC bus AB through the three-phase rectifier bridge and voltage regulator circuit. After passing through the full-bridge inverter, a high-frequency AC square wave voltage is formed at points C1D1 and C2D2. Then, through the LCL resonant network, a high-frequency sine wave is formed between E1F1 and E2F2 and loaded into the energy induction track, forming a high-frequency sinusoidal alternating magnetic field around the energy induction track.

[0043] Energy receiving unit: An induction energy harvesting device made of coil is placed above the induction track. According to the principle of electromagnetic induction, the alternating magnetic field in the induction track induces an alternating voltage in the closed coil of the induction energy harvesting device. After passing through the reactive power compensation device, the voltage is output to the power regulation unit, and then a stable DC power supply is provided to the load.

[0044] Furthermore, the power induction track includes a main power track and an auxiliary track, and the induction energy harvesting device includes multiple main power coils and auxiliary coils; wherein, the main power coils are located on the main power track, and the auxiliary coils are located on the auxiliary track.

[0045] Please see Figure 2 The system further includes an electromagnetic energy control unit disposed on the power induction track. The electromagnetic energy control unit is used to calculate the corresponding current error within the control cycle based on the effective current values ​​of the main power track and the auxiliary track, and to generate a PWM signal to control the turn-on and turn-off of the auxiliary full-bridge inverter within the control cycle based on the triangular wave and the current error.

[0046] Furthermore, the electromagnetic energy control unit includes a first current transformer (CT) disposed on the main power rail. M The second current transformer CT is installed on the auxiliary track. A Two current transformers, one connected to the first current transformer (CT), are respectively connected to the first current transformer (CT). M and the second current transformer CT A The system comprises an AC-RMS (Accurate Dynamics Calculation Module) electrically connected to the AC-RMS, a PI controller electrically connected to the output of the AC-RMS, a compensator electrically connected to the output of the PI controller via a triangular sawtooth wave generator, and a PWM generator electrically connected to the output of the compensator.

[0047] Understandably, in dynamic wireless power supply applications such as industrial material transportation, it is necessary to maintain a constant electromagnetic energy from the primary track to the secondary track, i.e., a constant electromagnetic energy between the main power track and the auxiliary track. This is achieved by using current transformers (CTs) on both the main power track and the auxiliary track. M With CT A Track current information is collected, and then the main power track current signal i is obtained. pM and auxiliary track current signal i pA By calculating the control period T separately c The effective AC value of the internal current signal is obtained by obtaining the effective current value I. pM with I pA The sum of the two and the reference current value I ref The difference is used to obtain the current error e. k The signal is obtained by comparing the signal with a triangular wave after passing through a PI controller. The PWM signal is then used to control the switching on and off of the PWM wave of the auxiliary full-bridge inverter within one control cycle.

[0048] Please see Figure 3 , because i pM with i pA These are the current signals in the main power track and the auxiliary track, respectively.c As the switching control signal for the auxiliary full-bridge inverter, when S c When S is high, the control system sends a PWM wave to control the switching transistors of the auxiliary full-bridge inverter. c When the voltage is low, the auxiliary full-bridge inverter bridge is disconnected. In this embodiment of the invention, when the system input voltage fluctuates, the voltage is adjusted by adjusting S... c The duty cycle T of the signal con / T c That is, the electromagnetic energy from the main power track to the auxiliary track can be kept constant.

[0049] The control model of the electromagnetic energy control unit is as follows:

[0050]

[0051] Among them, I m I is the total average current of the electrically induced track. pM The effective value of the current in the main power rail, I pA T is the effective value of the current in the auxiliary track. c To control the cycle, T on T is the pulse width on-time of the inverter bridge, ω is the switching frequency of the auxiliary full-bridge inverter, and T is the pulse width on-time of the inverter bridge. con For control period T c The opening time of the inner auxiliary track, U dc L is the output voltage of the rectifier bridge after three-phase rectification. f1M L is the first main resonant inductor in the first LCL resonant circuit. f1A It is the first auxiliary resonant inductor in the second LCL resonant circuit.

[0052] Please see Figures 4 to 5 When the alternating magnetic field in the induction track induces an alternating voltage in the closed coils (main power coil and auxiliary coil) of the induction energy harvesting device, the calculation model for the magnetic flux generated by the main power track through the j-th main power coil and auxiliary coil region is as follows:

[0053]

[0054] The calculation model for the magnetic flux generated by the auxiliary track through the j-th main power coil and the auxiliary coil region is as follows:

[0055]

[0056] Among them, L AH L AE L AG L AF L DE L DH L DF and L DGThe length between the two magnetic flux points, and the number of turns N of the main power coil. m and auxiliary coil N A The number of turns is odd, r A r is the auxiliary coil spacing. M Main coil spacing, d L μ is the diameter of the main power coil, and μ0 is the permeability of air.

[0057] The total mutual inductance between the main power rail and the coil is:

[0058]

[0059] The coil includes a main power coil and an auxiliary coil, M M The mutual inductance between the main track and the main coil, M MA The mutual inductance between the main track and the auxiliary coil, d CM Main power coil thickness, d CA For the thickness of the auxiliary coil, d M The thickness of the main power rail. The calculation method for the total mutual inductance (MSA) between the auxiliary rail and the coil is similar to that for the MSM.

[0060] Therefore, the resonant induced voltage U of the secondary power extraction mechanism out Represented as:

[0061] U out =jωM SM I pM +jωI pA M SA T con / T c

[0062] By designing an inductive energy harvesting device, M is guaranteed. sm =M sa =M, at this time, the output voltage U out :

[0063] U out =jωMI m

[0064] Based on the given modulation strategy, I is guaranteed. m The constant voltage indicates that the resonant voltage of the power supply mechanism of the designed system remains constant within one cycle, thus achieving a constant output voltage.

[0065] Understandably, this invention consists of a three-phase rectifier bridge and two parallel inductively coupled power transfer systems. The energy transmitting section of the inductively coupled power transfer system is formed by cascading a full-bridge inverter and an LCL resonant network circuit, while the energy receiving section consists of an inductive energy harvesting device, a reactive power compensation device, and a power regulation unit. By introducing an LCL resonant network into the main power rail and operating it at a constant frequency and duty cycle, most of the power transfer can be achieved; the parallel auxiliary rail controls the switching on and off of the inverter within the control cycle, enabling the system to receive a constant amount of electrical energy.

[0066] The parallel dynamic inductively coupled power transmission system provided by this invention includes a three-phase rectifier bridge and two parallel inductively coupled power transmission systems. Each inductively coupled power transmission system includes an energy transmitter and an energy receiver. The energy transmitter includes a full-bridge inverter circuit and an LCL resonant network cascaded with the full-bridge inverter circuit. The energy receiver includes an inductive energy harvesting device, a reactive power compensation device, and a power regulation unit. The energy transmitter and the energy receiver are connected via an inductive power track. Compared to existing technologies, in this invention, one track provides most of the energy, while the other track dynamically adjusts the track current fluctuations caused by the input voltage in real time. This solves the efficiency degradation problem caused by adjusting the duty cycle, phase shift angle, or adding a voltage regulation unit in traditional wireless power supply systems, making it suitable for high-efficiency contactless mobile power supply applications and meeting practical application requirements.

[0067] Please see Figure 6 The present invention also provides a parallel dynamic inductive coupling power transmission method, which is applicable to the above-mentioned parallel dynamic inductive coupling power transmission system, and the method includes:

[0068] Step S21: The three-phase mains power on the grid side is converted into stable DC power through a three-phase rectifier bridge, and the stable DC power is converted into high-frequency AC square wave voltage through a full-bridge inverter circuit.

[0069] Step S22: The high-frequency AC square wave voltage is converted into a high-frequency sine wave through an LCL resonant network and loaded into the electric energy induction track to form a high-frequency sinusoidal alternating magnetic field.

[0070] Step S23: Place an induction energy harvesting device made of coils above the induction track. According to the principle of electromagnetic induction, the alternating magnetic field in the induction track induces an alternating voltage in the closed coil of the induction energy harvesting device. After passing through the reactive power compensation device, the voltage is output to the power regulation unit, and then a stable DC power supply is output to the load.

[0071] The parallel dynamic inductive coupling power transmission method provided by this invention converts the three-phase mains power from the grid side into stable DC power through a three-phase rectifier bridge, and then converts the stable DC power into a high-frequency AC square wave voltage through a full-bridge inverter circuit. This high-frequency AC square wave voltage is then converted into a high-frequency sine wave through an LCL resonant network and applied to the power induction track to form a high-frequency sinusoidal alternating magnetic field. An inductive energy harvesting device made of coils is placed above the power induction track. According to the principle of electromagnetic induction, the alternating magnetic field in the power induction track induces an alternating voltage in the closed coil of the inductive energy harvesting device. After passing through a reactive power compensation device, the voltage is output to a power regulation unit, which then outputs stable DC power to the load. Compared with existing technologies, in this invention, one track provides most of the energy, while the other track dynamically adjusts the track current fluctuations caused by the input voltage in real time. This solves the problem of efficiency reduction caused by adjusting the duty cycle, phase angle, or adding a voltage regulation unit in traditional wireless power supply systems. It is suitable for high-efficiency contactless mobile power supply applications and meets practical application requirements.

[0072] It should be understood that although the steps in the flowchart above are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowchart above may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0073] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A parallel dynamic inductive coupling power transmission system, characterized in that, The system includes: a three-phase rectifier bridge and two parallel inductively coupled power transfer systems. Each inductively coupled power transfer system includes an energy transmitter and an energy receiver. The energy transmitter includes a full-bridge inverter circuit and an LCL resonant network cascaded with the full-bridge inverter circuit. The energy receiver includes an inductive energy harvesting device, a reactive power compensation device, and a power regulation unit. The energy transmitter and the energy receiver are connected via an inductive power rail. The power induction track includes a main power track and an auxiliary track, and the induction energy harvesting device includes a main power coil and an auxiliary coil; wherein, the main power coil is located on the main power track, and the auxiliary coil is located on the auxiliary track; The system also includes an electromagnetic energy control unit located on the power induction track. The electromagnetic energy control unit is used to calculate the corresponding current error within the control cycle based on the effective current values ​​of the main power track and the auxiliary track, and to generate a PWM signal to control the turn-on and turn-off of the auxiliary full-bridge inverter within the control cycle based on the triangular wave and the current error.

2. The parallel dynamic inductive coupling power transmission system according to claim 1, characterized in that, The full-bridge inverter circuit includes a main power full-bridge inverter and an auxiliary full-bridge inverter; wherein, a high-frequency AC square wave voltage is formed between the two output points of the main power full-bridge inverter and the auxiliary full-bridge inverter.

3. The parallel dynamic inductive coupling power transmission system according to claim 2, characterized in that, The LCL resonant network includes a first LCL resonant circuit connected to the output terminal of the main power full-bridge inverter, and a second LCL resonant circuit electrically connected to the output terminal of the auxiliary full-bridge inverter; wherein, a high-frequency sine wave is formed between the two output points of the first LCL resonant circuit and the two output points of the second LCL resonant circuit, and is loaded in the power induction track.

4. The parallel dynamic inductive coupling power transmission system according to claim 1, characterized in that, The electromagnetic energy control unit includes a first current transformer located on the main power track, a second current transformer located on the auxiliary track, two AC RMS value calculation modules electrically connected to the first and second current transformers respectively, a PI controller electrically connected to the output of the AC RMS value calculation modules, a compensator electrically connected to the output of the PI controller via a triangular sawtooth wave generator, and a PWM generator electrically connected to the output of the compensator.

5. The parallel dynamic inductive coupling power transmission system according to claim 4, characterized in that, The control model of the electromagnetic energy control unit is as follows: in, The total average current of the electrically induced track. I pM The effective value of the current in the main power rail. I pA This is the effective value of the current in the auxiliary track. T c To control the cycle, T on This refers to the pulse width on-time of the inverter bridge. ω To assist the switching frequency of the full-bridge inverter, To control the cycle T c The opening time of the inner auxiliary track, This is the output voltage of the rectifier bridge after three-phase rectification. This is the first main resonant inductor in the first LCL resonant circuit. It is the first auxiliary resonant inductor in the second LCL resonant circuit.

6. The parallel dynamic inductive coupling power transmission system according to claim 5, characterized in that, The magnetic flux calculation model for the main power track generated through the j-th main power coil and auxiliary coil region is as follows: The calculation model for the magnetic flux generated by the auxiliary track through the j-th main power coil and the auxiliary coil region is as follows: in, L AH , L AE , L AG , L AF , L DE , L DH , L DF as well as L DG The length between the two magnetic flux points, and the number of turns N of the main power coil. m and the number of turns N of the auxiliary coil A It is an odd number. For auxiliary coil spacing, Main power coil spacing, The diameter of the main power coil, ρ is the magnetic permeability of air.

7. The parallel dynamic inductive coupling power transmission system according to claim 6, characterized in that, The total mutual inductance between the main power rail and the coil is: The coil includes a main power coil and an auxiliary coil. The mutual inductance between the main power rail and the main power coil. The mutual inductance between the main power track and the auxiliary coil The thickness of the main power coil, For auxiliary coil thickness, The thickness of the main power track.

8. A parallel-type dynamic inductive coupling power transfer method, characterized in that, The method, applied to the parallel dynamic inductive coupling power transmission system as described in any one of claims 1 to 7, comprises: The three-phase mains power on the grid side is converted into stable DC power through a three-phase rectifier bridge, and the stable DC power is converted into high-frequency AC square wave voltage through a full-bridge inverter circuit. The high-frequency AC square wave voltage is converted into a high-frequency sine wave through an LCL resonant network and loaded into an electric energy induction track to form a high-frequency sinusoidal alternating magnetic field. An induction energy harvesting device made of coil is placed above the induction track. According to the principle of electromagnetic induction, the alternating magnetic field in the induction track induces an alternating voltage in the closed coil of the induction energy harvesting device. After passing through the reactive power compensation device, the voltage is output to the power regulation unit, and then outputs a stable DC power supply to the load.

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