阅读说明：本技术 一种高速直线推进和无线电能传输兼用的系统及方法 (System and method for high-speed linear propulsion and wireless power transmission ) 是由 张志华 毛凯 蔡华 闫少强 李秋君 周皓楠 李萍 于 2020-05-20 设计创作，主要内容包括：本发明提供了一种高速直线推进和无线电能传输兼用的系统及方法,该系统包括定子线圈、动子磁体、无线电能接收线圈、发射变流装置和接收变流装置；定子线圈和发射变流装置设置于固定设备上,动子磁体、无线电能接收线圈和接收变流装置设置于运动设备上,动子磁体和无线电能接收线圈间隔排布设置并与定子线圈相对应；动子磁体用于根据定子线圈上的低频电流通过电磁感应原理产生推进力以推进运动设备运动；接收变流装置用于滤除无线电能接收线圈感应出的低频电压,并对无线电能接收线圈感应出的高频电压进行处理得到滤波后的直流电压为运动设备供电。本发明能够解决现有的高速磁悬浮列车供电成本高的技术问题。(The invention provides a system and a method for high-speed linear propulsion and wireless power transmission, wherein the system comprises a stator coil, a rotor magnet, a wireless power receiving coil, a transmitting converter device and a receiving converter device; the stator coil and the transmitting current transformer are arranged on the fixed equipment, the rotor magnet, the wireless power receiving coil and the receiving current transformer are arranged on the moving equipment, and the rotor magnet and the wireless power receiving coil are arranged at intervals and correspond to the stator coil; the rotor magnet is used for generating a propelling force according to low-frequency current on the stator coil through an electromagnetic induction principle so as to propel the movement equipment to move; the receiving converter device is used for filtering low-frequency voltage induced by the wireless power receiving coil and processing the high-frequency voltage induced by the wireless power receiving coil to obtain filtered direct-current voltage for supplying power to the movement equipment. The invention can solve the technical problem of high power supply cost of the existing high-speed maglev train.)

1. A high-speed linear propulsion and wireless power transmission dual-purpose system is characterized by comprising a stator coil (10), a rotor magnet (20), a wireless power receiving coil (30), a transmitting current transformer (40) and a receiving current transformer (50); the stator coil (10) and the transmitting current transformer (40) are arranged on a fixed device, the stator coil (10) is connected with the transmitting current transformer (40), the rotor magnet (20), the wireless power receiving coil (30) and the receiving current transformer (50) are arranged on a moving device, the wireless power receiving coil (30) is connected with the receiving current transformer (50), and the rotor magnet (20) and the wireless power receiving coil (30) are arranged at intervals and correspond to the stator coil (10);

the transmitting current transformer (40) is used for generating low-frequency current and high-frequency current, coupling the low-frequency current and the high-frequency current and outputting the coupled low-frequency current and high-frequency current to the stator coil (10);

the stator coil (10) is used for receiving the coupled low-frequency current and high-frequency current;

the rotor magnet (20) is used for generating a propelling force according to low-frequency current on the stator coil (10) through an electromagnetic induction principle to propel the motion equipment to move;

the wireless power receiving coil (30) is used for inducing a low-frequency voltage and a high-frequency voltage according to the low-frequency current and the high-frequency current on the stator coil (10);

the receiving converter device (50) is used for filtering low-frequency voltage induced by the wireless power receiving coil (30), and processing the high-frequency voltage induced by the wireless power receiving coil (30) to obtain filtered direct-current voltage for supplying power to the moving equipment.

2. The system of claim 1, wherein the transmitting and converting device (40) comprises a high frequency converter (41), a boosting converter (42), a first transformer (43) and a second transformer (44), the high frequency converter (41) is used for generating high frequency current, the boosting converter (42) is used for generating low frequency current, an input end of the first transformer (43) is connected with an output end of the high frequency converter (41), an input end of the second transformer (44) is connected with an output end of the boosting converter (42), an output end of the first transformer (43) is connected with an output end of the second transformer (44) in parallel, the first transformer (43) and the second transformer (44) are used for coupling low frequency current and high frequency current, and outputs the coupled low frequency current and high frequency current to the stator coil (10).

3. The system for both high-speed linear propulsion and wireless power transmission according to claim 2, characterized in that the receiving current transformation device (50) comprises a capacitance compensation frequency selector (51), a rectifier (52) and a supporting capacitor (53), the input end of the capacitance compensation frequency selector (51) is connected with the wireless power receiving coil (30), the output end is connected with the input end of the rectifier (52), the input end of the supporting capacitor (53) is connected with the output end of the rectifier (52), the output end is connected with the movement equipment, the capacitance compensation frequency selector (51) is used for filtering low-frequency voltage induced by the wireless power receiving coil (30), the rectifier (52) is used for converting the high-frequency voltage induced by the wireless power receiving coil (30) into direct-current voltage, the supporting capacitor (53) is used for filtering the direct-current voltage to obtain a filtered direct-current voltage.

4. A dual high speed linear propulsion and wireless power transfer system as claimed in claim 3, wherein the rectifier (52) is a controlled rectifier or a diode-controlled rectifier.

5. The system for both high-speed linear propulsion and wireless power transmission as claimed in claim 3, wherein said receiving converter device (50) further comprises a voltage sensor (54), said voltage sensor (54) is connected in parallel with said supporting capacitor (53), said voltage sensor (54) is used for feeding back the measured voltage to said high-frequency current transformer (41) for proportional-integral adjustment, so as to adjust the magnitude of the high-frequency current generated by said high-frequency current transformer (41).

6. The dual-purpose system for high-speed linear propulsion and wireless power transmission as claimed in claim 1, wherein the stator coil (10) and the wireless power receiving coil (30) are parallel to each other, and the center lines of the stator coil (10) and the wireless power receiving coil (30) are aligned, and the width of the stator coil (10) is the same as the width of the wireless power receiving coil (30).

7. The dual-purpose system for high-speed linear propulsion and wireless power transmission as claimed in claim 1, wherein the mover magnet (20) is a permanent magnet, a superconducting magnet or an electro-magnetic field.

8. The dual-purpose system for high-speed linear propulsion and wireless power transmission as claimed in claim 1, wherein the wireless power receiving coil (30) is provided with a magnetic core.

9. A method for dual use of high speed linear propulsion and wireless power transfer, the method comprising:

the transmitting current transformer generates low-frequency current and high-frequency current, couples the low-frequency current and the high-frequency current, and outputs the coupled low-frequency current and high-frequency current to the stator coil;

the stator coil receives the coupled low-frequency current and high-frequency current;

the rotor magnet generates a propelling force to propel the movement equipment to move according to the low-frequency current on the stator coil through the electromagnetic induction principle;

the wireless power receiving coil induces low-frequency voltage and high-frequency voltage according to the low-frequency current and the high-frequency current on the stator coil;

the receiving converter device filters low-frequency voltage induced by the wireless power receiving coil, and processes the high-frequency voltage induced by the wireless power receiving coil to obtain filtered direct-current voltage for supplying power to the movement equipment;

the stator coil and the transmitting converter device are arranged on the fixed equipment, the rotor magnet, the wireless power receiving coil and the receiving converter device are arranged on the moving equipment, and the rotor magnet and the wireless power receiving coil are arranged at intervals and correspond to the stator coil.

10. The method of claim 9, further comprising: the voltage sensor measures the voltage at the output end of the receiving converter and feeds the voltage back to the transmitting converter for proportional-integral regulation so as to adjust the magnitude of the generated high-frequency current.

Technical Field

The invention relates to the technical field of wireless power transmission, in particular to a system and a method for high-speed linear propulsion and wireless power transmission.

Background

The high-speed magnetic suspension train generally adopts a linear synchronous motor and a magnetic suspension technology to realize the non-contact traction operation of the train and a track, and the power supply problem of the magnetic suspension train becomes a key difficult problem restricting the high-speed magnetic suspension train. The current power supply mode is to re-lay a set of special coils for wireless power transmission, but the system cost is additionally increased.

Disclosure of Invention

The invention provides a system and a method for high-speed linear propulsion and wireless power transmission, which can solve the technical problem of high power supply cost of the existing high-speed maglev train.

In one aspect of the invention, a system for both high-speed linear propulsion and wireless power transmission is provided, wherein the system comprises a stator coil, a rotor magnet, a wireless power receiving coil, a transmitting converter device and a receiving converter device; the stator coil and the transmitting variable flow device are arranged on fixed equipment, the stator coil is connected with the transmitting variable flow device, the rotor magnet, the wireless power receiving coil and the receiving variable flow device are arranged on moving equipment, the wireless power receiving coil is connected with the receiving variable flow device, and the rotor magnet and the wireless power receiving coil are arranged at intervals and correspond to the stator coil;

the transmitting current transformer is used for generating low-frequency current and high-frequency current, coupling the low-frequency current and the high-frequency current and outputting the coupled low-frequency current and high-frequency current to the stator coil;

the stator coil is used for receiving the coupled low-frequency current and high-frequency current;

the rotor magnet is used for generating a propelling force according to the low-frequency current on the stator coil through an electromagnetic induction principle so as to propel the motion equipment to move;

the wireless power receiving coil is used for inducing low-frequency voltage and high-frequency voltage according to the low-frequency current and the high-frequency current on the stator coil;

the receiving converter device is used for filtering low-frequency voltage induced by the wireless power receiving coil and processing high-frequency voltage induced by the wireless power receiving coil to obtain filtered direct-current voltage for supplying power to the movement equipment.

Preferably, the transmitting and current transforming device includes a high-frequency current transformer, a propulsion current transformer, a first transformer and a second transformer, the high-frequency current transformer is used for generating a high-frequency current, the propulsion current transformer is used for generating a low-frequency current, an input end of the first transformer is connected to an output end of the high-frequency current transformer, an input end of the second transformer is connected to an output end of the propulsion current transformer, an output end of the first transformer is connected to an output end of the second transformer in parallel, and the first transformer and the second transformer are used for coupling the low-frequency current and the high-frequency current and outputting the coupled low-frequency current and high-frequency current to the stator coil.

Preferably, the receiving converter device includes a capacitance compensation frequency selector, a rectifier and a support capacitor, an input end of the capacitance compensation frequency selector is connected to the wireless power receiving coil, an output end of the capacitance compensation frequency selector is connected to an input end of the rectifier, an input end of the support capacitor is connected to an output end of the rectifier, an output end of the support capacitor is connected to the motion device, the capacitance compensation frequency selector is configured to filter a low-frequency voltage induced by the wireless power receiving coil, the rectifier is configured to convert a high-frequency voltage induced by the wireless power receiving coil into a dc voltage, and the support capacitor is configured to filter the dc voltage to obtain a filtered dc voltage.

Preferably, the rectifier is a controllable rectifier or a diode-uncontrolled rectifier.

Preferably, the receiving converter device further includes a voltage sensor, the voltage sensor is connected in parallel with the supporting capacitor, and the voltage sensor is configured to feed back a measured voltage to the high-frequency converter for proportional-integral adjustment, so as to adjust a magnitude of a high-frequency current generated by the high-frequency converter.

Preferably, the stator coil and the wireless power receiving coil are parallel to each other, and center lines of the stator coil and the wireless power receiving coil are aligned, and a width of the stator coil is the same as a width of the wireless power receiving coil.

Preferably, the mover magnet is a permanent magnet, a superconducting magnet or an electric excitation.

Preferably, a magnetic core is arranged in the wireless power receiving coil.

In another aspect of the present invention, a method for both high-speed linear propulsion and wireless power transmission is provided, the method comprising:

the transmitting current transformer generates low-frequency current and high-frequency current, couples the low-frequency current and the high-frequency current, and outputs the coupled low-frequency current and high-frequency current to the stator coil;

the stator coil receives the coupled low-frequency current and high-frequency current;

the rotor magnet generates a propelling force to propel the movement equipment to move according to the low-frequency current on the stator coil through the electromagnetic induction principle;

the wireless power receiving coil induces low-frequency voltage and high-frequency voltage according to the low-frequency current and the high-frequency current on the stator coil;

the receiving converter device filters low-frequency voltage induced by the wireless power receiving coil, and processes the high-frequency voltage induced by the wireless power receiving coil to obtain filtered direct-current voltage for supplying power to the movement equipment;

the stator coil and the transmitting converter device are arranged on the fixed equipment, the rotor magnet, the wireless power receiving coil and the receiving converter device are arranged on the moving equipment, and the rotor magnet and the wireless power receiving coil are arranged at intervals and correspond to the stator coil.

Preferably, the method further comprises: the voltage sensor measures the voltage at the output end of the receiving converter and feeds the voltage back to the transmitting converter for proportional-integral regulation so as to adjust the magnitude of the generated high-frequency current.

By applying the technical scheme of the invention, low-frequency current meeting the traction requirement is introduced into the stator coil, high-frequency current meeting the wireless power transmission is superposed, meanwhile, the moving equipment is provided with the rotor magnets and the wireless power receiving coils which are arranged at intervals, and electromagnetic energy is utilized by frequency selection of respective circuits, so that the requirements of normal electromagnetic propulsion can be met, and the wireless power transmission function is realized.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 illustrates a schematic diagram of a system for dual use of high speed linear propulsion and wireless power transfer in accordance with an embodiment of the present invention;

fig. 2 is a view showing a structural arrangement of a stator coil, a mover magnet, and a wireless power receiving coil according to an embodiment of the present invention;

fig. 3 shows a schematic structural diagram of a transmitting deflector according to an embodiment of the invention;

fig. 4 shows the respective currents of the high frequency converter and the propulsion converter according to an embodiment of the invention;

FIG. 5 illustrates coupled currents of a high frequency converter and a propulsion converter in accordance with one embodiment of the present invention;

fig. 6 shows a schematic structural diagram of a receive deflector according to an embodiment of the invention;

FIG. 7 shows the voltage after frequency selection by a capacitance compensated frequency selector according to one embodiment of the invention;

fig. 8 is a flowchart illustrating a method for enabling high-speed linear propulsion and wireless power transmission according to an embodiment of the present invention.

Description of the reference numerals

10. A stator coil; 20. A mover magnet; 30. A wireless power receiving coil;

40. a transmitting current transformer; 41. A high frequency current transformer; 42. A propulsion converter;

43. a first transformer; 44. A second transformer; 50. Receiving a current transformer;

51. a capacitance compensation frequency selector; 52. A rectifier; 53. A support capacitor;

54. a voltage sensor; 55. And a current sensor.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Fig. 1 is a schematic diagram of a system for high-speed linear propulsion and wireless power transmission according to an embodiment of the invention. As shown in fig. 1, the present invention provides a system for both high-speed linear propulsion and wireless power transmission, wherein the system comprises a stator coil 10, a rotor magnet 20, a wireless power receiving coil 30, a transmitting current transformer 40 and a receiving current transformer 50; the stator coil 10 and the transmitting variable current device 40 are arranged on a fixed device, the stator coil 10 is connected with the transmitting variable current device 40, the mover magnet 20, the wireless power receiving coil 30 and the receiving variable current device 50 are arranged on a moving device, the wireless power receiving coil 30 is connected with the receiving variable current device 50, and the mover magnet 20 and the wireless power receiving coil 30 are arranged at intervals and correspond to the stator coil 10;

the transmitting current transformer 40 is used for generating a low-frequency current and a high-frequency current, coupling the low-frequency current and the high-frequency current, and outputting the coupled low-frequency current and high-frequency current to the stator coil 10;

the stator coil 10 is used for receiving the coupled low-frequency current and high-frequency current;

the mover magnet 20 is used for generating a propelling force to propel the moving equipment to move by an electromagnetic induction principle according to a low-frequency current on the stator coil 10;

the wireless power receiving coil 30 is used for inducing a low-frequency voltage and a high-frequency voltage according to the low-frequency current and the high-frequency current on the stator coil 10;

the receiving converter device 50 is configured to filter a low-frequency voltage induced by the wireless power receiving coil 30, and process a high-frequency voltage induced by the wireless power receiving coil 30 to obtain a filtered dc voltage for supplying power to the motion device.

Wherein the mover magnet 20 and the wireless power receiving coil 30 may be arranged at intervals in various forms. For example, if a represents the mover magnet 20 and B represents the wireless power receiving coil 30, the spacing arrangement may be: ABABAB …, AABBAABB …, AAABBBAAABBB …, ABBABB … or BAABAA … and the like.

According to the invention, low-frequency current meeting traction requirements is introduced into the stator coil 10, high-frequency current meeting wireless power transmission is superposed, meanwhile, the mover magnets 20 and the wireless power receiving coil 30 which are distributed at intervals are arranged on the moving equipment, electromagnetic energy is utilized through frequency selection of respective circuits, the requirements of normal electromagnetic propulsion can be met, and the wireless power transmission function is also realized.

Fig. 2 is a view showing a structural arrangement of a stator coil, a mover magnet, and a wireless power receiving coil according to an embodiment of the present invention. As shown in fig. 2, the mover magnet 20 and the radio power receiving coil 30 take the form of AABBAABB …, and in the present embodiment, 1 mover magnet 20 and 1 radio power receiving coil correspond to 3 stator coils, that is, the sum of the length of 1 mover magnet 20 and the length of 1 radio power receiving coil 30 is equal to the length of 3 stator coils. The structural arrangement diagram in fig. 2 is only an exemplary embodiment of the present invention, and is not intended to limit the present invention, and in the present invention, the mover magnet, the wireless power receiving coil, and the stator coil may be designed to have any length according to the need. In practical application, the mover magnet, the wireless power receiving coil and the stator coil can be designed to have any length and any number according to requirements. Wherein, the length direction is the moving direction of the moving equipment.

Fig. 3 shows a schematic structural diagram of a transmitting current transformer according to an embodiment of the present invention. As shown in fig. 3, the transmitting and current transforming apparatus 40 includes a high frequency current transformer 41, a propelling current transformer 42, a first transformer 43 and a second transformer 44, the high frequency current transformer 41 is used for generating a high frequency current, the propelling current transformer 42 is used for generating a low frequency current, an input end of the first transformer 43 is connected to an output end of the high frequency current transformer 41, an input end of the second transformer 44 is connected to an output end of the propelling current transformer 42, an output end of the first transformer 43 is connected in parallel to an output end of the second transformer 44, and the first transformer 43 and the second transformer 44 are used for coupling the low frequency current and the high frequency current and outputting the coupled low frequency current and high frequency current to the stator coil 10.

The propulsion converter 42 and the high frequency converter 41 are generally three-phase system outputs. The respective transformation ratios of the first transformer 43 and the second transformer 44 are designed to match according to requirements. The currents generated by the high frequency current transformer 41 and the propulsion current transformer 42 are shown in fig. 4. The currents of the high frequency current transformer 41 and the propulsion current transformer 42 after coupling are shown in fig. 5.

Fig. 6 shows a schematic structural diagram of a receiving current transformer according to an embodiment of the present invention. As shown in fig. 6, the receiving converter 50 includes a capacitance compensation frequency selector 51, a rectifier 52 and a support capacitor 53, an input end of the capacitance compensation frequency selector 51 is connected to the wireless power receiving coil 30, an output end of the capacitance compensation frequency selector is connected to an input end of the rectifier 52, an input end of the support capacitor 53 is connected to an output end of the rectifier 52, and an output end of the support capacitor 53 is connected to a motion device, the capacitance compensation frequency selector 51 is configured to filter a low-frequency voltage induced by the wireless power receiving coil 30, the rectifier 52 is configured to convert a high-frequency voltage induced by the wireless power receiving coil 30 into a dc voltage, and the support capacitor 53 is configured to filter the dc voltage to obtain a filtered dc voltage.

The rectifier 52 may be a controllable rectifier to regulate the output voltage, or a diode uncontrolled rectifier. The voltage frequency-selected by the capacitance compensation frequency selector 51 is shown in fig. 7.

According to an embodiment of the present invention, the receiving current transformer 50 further includes a voltage sensor 54, the voltage sensor 54 is connected in parallel with the supporting capacitor 53, and the voltage sensor 54 is configured to feed back a measured voltage to the high-frequency current transformer 41 for proportional-integral adjustment, so as to adjust the magnitude of the high-frequency current generated by the high-frequency current transformer 41. The receiving inverter 50 further comprises a current sensor 55, and the current sensor 55 is connected in series between the wireless power receiving coil 30 and the rectifier 52 for measuring the current.

According to an embodiment of the present invention, the stator coil 10 and the wireless power receiving coil 30 are parallel to each other, and the center lines of the two are aligned, and the width of the stator coil 10 is the same as the width of the wireless power receiving coil 30, so that the electromagnetic coupling area between the stator coil 10 and the wireless power receiving coil 30 can be maximized, thereby enhancing the electromagnetic coupling capability and improving the transmission efficiency. The present embodiment is only one preferred embodiment of the present invention, and is not intended to limit the present invention, and the present invention may be implemented even when the stator coil 10 and the wireless power receiving coil 30 are not parallel to each other, or the center lines of the stator coil 10 and the wireless power receiving coil 30 are not aligned, or the width of the stator coil 10 is different from the width of the wireless power receiving coil 30.

The center line of the two aligned lines is the center line along the moving direction of the moving equipment. The stator coil 10 and the wireless power receiving coil 30 may be rectangular, rounded rectangular, or polygonal.

The wireless power receiving coil 30 may be formed by a plurality of coils, and each coil is connected to the receiving current transformer 50.

According to one embodiment of the present invention, the mover magnet 20 is a permanent magnet, a superconducting magnet, or an electro-magnetic field. The mover magnet 20 may have a rectangular shape, a rounded rectangular shape, or a polygonal shape.

According to an embodiment of the present invention, a magnetic core, such as ferrite, is disposed in the wireless power receiving coil 30 to enhance the electromagnetic coupling capability of the wireless power receiving coil 30 and improve the transmission efficiency.

A detailed description of the structural arrangement of the stator coil 10, the mover magnet 20, and the wireless power receiving coil 30 will be given below as one embodiment of the present invention.

In the present exemplary embodiment, the stationary device is a magnetic levitation train track and the moving device is a magnetic levitation train. The stator coils 10 may be installed at both left and right sides of the maglev train track, or at the bottom of the maglev train track, and the mover magnets 20 and the wireless power receiving coils 30 are correspondingly installed at both left and right sides of the maglev train or at the bottom of the maglev train to correspond to the positions of the stator coils 10.

Fig. 8 is a flowchart illustrating a method for enabling high-speed linear propulsion and wireless power transmission according to an embodiment of the present invention. As shown in fig. 8, the present invention provides a method for both high-speed linear propulsion and wireless power transmission, wherein the method comprises:

s1, generating low-frequency current and high-frequency current by the transmitting current transformer, coupling the low-frequency current and the high-frequency current, and outputting the coupled low-frequency current and high-frequency current to the stator coil;

s2, the stator coil receives the coupled low-frequency current and high-frequency current;

s3, generating a propelling force by the mover magnet according to the low-frequency current on the stator coil through an electromagnetic induction principle to propel the motion equipment to move;

s4, the wireless power receiving coil induces low-frequency voltage and high-frequency voltage according to the low-frequency current and the high-frequency current on the stator coil;

s5, filtering low-frequency voltage induced by the wireless power receiving coil by the receiving converter device, and processing the high-frequency voltage induced by the wireless power receiving coil to obtain filtered direct-current voltage for supplying power to the motion equipment;

the stator coil and the transmitting converter device are arranged on the fixed equipment, the rotor magnet, the wireless power receiving coil and the receiving converter device are arranged on the moving equipment, and the rotor magnet and the wireless power receiving coil are arranged at intervals and correspond to the stator coil.

According to an embodiment of the invention, the method further comprises: the voltage sensor measures the voltage at the output end of the receiving converter and feeds the voltage back to the transmitting converter for proportional-integral regulation so as to adjust the magnitude of the generated high-frequency current.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.