A rotary drive and contactless power supply system based on a single excitation coil

Abstract

The present invention discloses a rotary drive and contactless power supply system based on a single excitation coil, in which a three-phase square wave driving voltage is loaded onto a stator excitation coil winding component through a three-phase inverter circuit module, and the stator excitation coil winding component generates an electromagnetic torque which is loaded onto a rotor permanent magnet component, and a rotor rotating platform component, a three-phase rectifier circuit module, a rotor power receiving coil winding component and a rotor permanent magnet component rotate. At the same time, the magnetic flux size in the rotor power receiving coil winding component changes periodically to generate a three-phase induced electromotive force voltage, and the three-phase rectifier circuit module rectifies and transforms the three-phase induced electromotive force voltage and outputs a DC voltage. The advantage is that the rotary drive and contactless rotary power supply functions can be realized simultaneously, thereby reducing the number of functional modules in the rotary working condition equipment, reducing its volume, reducing its maintenance cost, and promoting the miniaturization and low cost of the rotary working condition equipment.

Description

Technical Field

[0001] The present invention relates to a power supply system, in particular to a rotation drive and non-contact power supply system based on a single excitation coil. Background Art

[0002] In rotating working equipment such as lidar, smart drills, and visual imaging systems, some components need to operate in a rotational motion. Therefore, on the one hand, these components need to be provided with a rotational drive torque to rotate, and on the other hand, the electronic equipment within these components needs to be supplied with electrical energy. To meet this rotational drive requirement, a motor can be mounted on a stationary base. By combining the motor shaft with a pulley or other transmission mechanism, the motor's output rotational drive torque is transmitted to a specific component (i.e., the rotating component), ultimately driving the component's rotation. To meet this rotational power supply requirement, since the main power supply is typically mounted on a stationary component, it is not possible to directly connect the power receiving equipment on the rotating component via a power cable. Instead, a conductive slip ring mechanism or a rotary coupling transformer is typically used to achieve this. The conductive slip ring mechanism power supply solution belongs to the contact power supply technology. This solution uses the sliding contact between the brush and the conductive slip ring to transmit power. The power transmission capacity and efficiency are relatively high, but the friction between the brush and the conductive slip ring can easily produce sparks, dust, wear and other adverse conditions. The rotary coupling transformer solution belongs to the non-contact power supply technology. This solution uses the magnetic coupling between the primary coil and the secondary coil of the transformer to achieve power transmission, which can solve the above-mentioned defects of the contact power supply technology.

[0003] Rotary drive and rotary power supply are used in many occasions. For example, the Chinese patent application number CN201910782720.0 discloses a rotary drive device and an LED light strip rotary imaging device. The LED light strip rotary imaging device uses an independent motor to drive the LED light strip to rotate to present different visual effects. At the same time, the transmitting coil and the receiving coil are respectively installed on the stator platform and the rotor platform to realize non-contact power transmission, thereby powering the LED light strip in the rotating motion state. For example, the Chinese patent application number CN202110039571.6 discloses a light weapon intelligent counterattack system. The system uses an independent rotary motor to drive the laser emitting device to rotate, and uses an independent rotary power supply unit to power the rotating laser emitting device, thereby realizing laser indication within a 360-degree range. For example, the Chinese patent application number CN202110810362.7 discloses a narrow-window coaxial single-line laser scanning rangefinder, which uses an independent motor to drive the ranging laser module to rotate, thereby realizing 360-degree single-line laser scanning ranging; at the same time, the narrow-window coaxial single-line laser scanning rangefinder is designed with an independent wireless power transmission / receiving module, wherein the wireless power transmission module is installed on a stationary base, and the wireless power reception module rotates together with the ranging laser module, and wireless power transmission is performed through the magnetic coupling between the transmitting coil of the wireless power transmission module and the receiving coil of the wireless power reception module, thereby powering the ranging laser module.

[0004] As can be seen, currently, this type of rotating equipment often adopts a design that separates the functions of rotary drive and rotary power supply. This means that a separate power unit (such as an additional motor) is used to achieve rotary drive, while a separate power supply unit (such as a conductive slip ring or rotary coupling transformer) is used to provide rotary power supply. While this functional separation can achieve the desired goals, it also leads to problems such as an increase in the number of functional modules in the rotating equipment, an increase in equipment size, and increased maintenance costs. These problems hinder the miniaturization and cost-effectiveness of this type of rotating equipment. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a rotary drive and contactless power supply system based on a single excitation coil. This system can simultaneously realize rotary drive and contactless rotary power supply functions, thereby reducing the number of functional modules in rotary working equipment, reducing its size and maintenance costs, and promoting the miniaturization and cost reduction of rotary working equipment.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a rotary drive and contactless power supply system based on a single excitation coil, comprising a stator base platform component, a three-phase inverter circuit module, a rotor permanent magnet component, a stator excitation coil winding component, a rotor power receiving coil winding component, a three-phase rectifier circuit module, a rotor rotating platform component and a rotor shaft, wherein the rotor rotating platform component is located above the stator base platform component, the stator excitation coil winding component, the rotor permanent magnet component and the three-phase inverter circuit module are spaced apart in order from top to bottom, and the stator excitation coil winding component and the three-phase inverter circuit module are fixed. On the stator base platform component, the rotor power receiving coil winding component is fixed on the rotor rotating platform component, the rotor power receiving coil winding component is located above the stator excitation coil winding component, the three-phase rectifier circuit module is located above the rotor power receiving coil winding component and is fixed on the rotor rotating platform component, and the rotor shaft passes through the rotor rotating platform component, the three-phase rectifier circuit module, the rotor power receiving coil winding component, the stator excitation coil winding component, the rotor permanent magnet component, the three-phase inverter circuit module and the stator base platform component from top to bottom. , the rotor shaft is fixedly connected to the rotor rotating platform component, the rotor power receiving coil winding component and the rotor permanent magnet component, the rotor shaft is rotatably connected to the stator base platform component, the three-phase inverter circuit module is electrically connected to the stator excitation coil winding component through a cable, and the three-phase rectifier circuit module is electrically connected to the rotor power receiving coil winding component through a cable; when the rotation drive and contactless power supply system are working, the three-phase inverter circuit module is connected to an external DC power supply, and the DC power supply voltage from the external DC power supply output to it is inverted into a three-phase square wave drive Voltage is applied to the stator excitation coil winding component, and the stator excitation coil winding component generates an alternating rotating magnetic field that acts on the rotor permanent magnet component, interacting with the permanent magnet magnetic field generated by the rotor permanent magnet component, thereby generating an electromagnetic torque that is applied to the rotor permanent magnet component. Under the driving action of the electromagnetic torque, the rotor rotating platform component, the three-phase rectifier circuit module, the rotor power receiving coil winding component, the rotor permanent magnet component, and the rotor shaft rotate relative to the stator excitation coil winding component, the three-phase inverter circuit module, and the stator base platform component.At the same time, the alternating rotating magnetic field acts on the rotor power receiving coil winding component, causing the magnetic flux in the rotor power receiving coil winding component to periodically change, thereby generating a three-phase induced electromotive force voltage. The three-phase rectifier circuit module rectifies and transforms the three-phase induced electromotive force voltage and outputs a DC voltage, thereby supplying power to other power receiving devices installed on the rotor rotating platform component and rotating synchronously with the rotor rotating platform component.

[0007] The stator excitation coil winding component includes a stator support structure, a three-phase stator coil winding and six stator silicon steel sheet groups. The stator support structure includes a first outer circumferential ring, a first inner circumferential ring and six first connecting arms. The first inner circumferential ring is coaxially arranged in the first outer circumferential ring. The rotor shaft passes through the first outer circumferential ring coaxially. The first outer circumferential ring and the rotor shaft are rotatably connected. The first outer circumferential ring is fixed on the stator base platform component. The first outer circumferential ring is fixed on the stator base platform component. The circumferential ring is connected and fixed to the first inner circumferential ring by the six first connecting arms. The six first connecting arms are evenly spaced along the circumference with the rotor shaft as the center. The angle between each adjacent two first connecting arms is 60 degrees. A first assembly space is formed between each adjacent two first connecting arms. Six first assembly spaces are formed between the six first connecting arms. The six stator silicon steel sheet groups are installed in the six first assembly spaces one by one. Each stator silicon steel sheet group consists of n silicon steel sheets along the first assembly space in which it is located. The stator silicon steel sheet group is radially stacked, and its radial cross-section is an isosceles trapezoid, n is an integer greater than or equal to 2, the upper base of the isosceles trapezoidal radial cross-section of each stator silicon steel sheet group faces the first inner circumferential ring, the lower base of the isosceles trapezoidal radial cross-section of each stator silicon steel sheet group faces the first outer circumferential ring, and the two waists of the isosceles trapezoidal radial cross-section of each stator silicon steel sheet group are fixed to the left and right first connecting arms thereof by gluing; the three-phase stator coil winding includes six stator sub-coils, and the six stator sub-coils and the six stator silicon steel sheets are connected to each other. The steel sheet groups correspond one to one, and a corresponding stator sub-coil is wound on the inner side, left side, outer side, and right side of the stator silicon steel sheet group. One end of the stator sub-coil is led out from the outer side of the stator silicon steel sheet group, and the other end is close to the inner side of the stator silicon steel sheet group. The winding directions of two adjacent stator sub-coils are opposite, that is, one is clockwise and the other is counterclockwise. The three-phase stator coil windings are respectively recorded as A-phase stator coil winding, B-phase stator coil winding, and C-phase stator coil winding.Any stator sub-coil with a clockwise winding direction is taken as the first stator sub-coil. Starting from the first stator sub-coil, the other five sub-coils in the clockwise direction are the second stator sub-coil, the third stator sub-coil, the fourth stator sub-coil, the fifth stator sub-coil and the sixth stator sub-coil. The first stator sub-coil and the fourth stator sub-coil constitute the A-phase stator coil winding. The end of the first stator sub-coil close to the outer side surface of the stator silicon steel sheet group is recorded as A+ of the stator excitation coil winding component, the end of the fourth stator sub-coil close to the outer side surface of the stator silicon steel sheet group is recorded as A- of the stator excitation coil winding component, and the other end of the first stator sub-coil is recorded as A-. The end of the second stator sub-coil is connected to the other end of the fourth stator sub-coil, the second stator sub-coil and the fifth stator sub-coil constitute the C-phase stator coil winding, the end of the second stator sub-coil close to the outer side of the stator silicon steel sheet group is recorded as C- of the stator excitation coil winding component, the end of the fifth stator sub-coil close to the outer side of the stator silicon steel sheet group is recorded as C+ of the stator excitation coil winding component, the other end of the second stator sub-coil is connected to the other end of the fifth stator sub-coil, the third stator sub-coil and the sixth stator sub-coil constitute the B-phase stator coil winding, and the end of the third stator sub-coil close to the outer side of the stator silicon steel sheet group is recorded as B of the stator excitation coil winding component. +, one end of the sixth stator sub-coil close to the outer side surface of the stator silicon steel sheet group is recorded as B- of the stator excitation coil winding component, the other end of the third stator sub-coil is connected to the other end of the sixth stator sub-coil, and the A- of the stator excitation coil winding component, the B- of the stator excitation coil winding component and the C- of the stator excitation coil winding component are connected; the three-phase inverter circuit module loads the three-phase stator coil winding with a three-phase square wave drive voltage through the A+, B+ and C+ of the stator excitation coil winding component, and adopts a six-step commutation-two-two conduction method to control the power-on of the three-phase stator coil winding. The first step is the A-phase stator coil winding and the B-phase stator winding. The first step is to energize the stator coil winding: a positive voltage is applied to the A+ of the stator excitation coil winding component, the B+ of the stator excitation coil winding component is grounded, and the C+ of the stator excitation coil winding component is suspended; the second step is to energize the A-phase stator coil winding and the C-phase stator coil winding: a positive voltage is applied to the A+ of the stator excitation coil winding component, the B+ of the stator excitation coil winding component is suspended, and the C+ of the stator excitation coil winding component is grounded; the third step is to energize the B-phase stator coil winding and the C-phase stator coil winding: the A+ of the stator excitation coil winding component is suspended, a positive voltage is applied to the B+ of the stator excitation coil winding component, and the C+ of the stator excitation coil winding component is grounded;The fourth step is to energize the B-phase stator coil winding and the A-phase stator coil winding: the A+ of the stator excitation coil winding component is grounded, the B+ of the stator excitation coil winding component is applied with a positive voltage, and the C+ of the stator excitation coil winding component is suspended; the fifth step is to energize the C-phase stator coil winding and the A-phase stator coil winding: the A+ of the stator excitation coil winding component is grounded, the B+ of the stator excitation coil winding component is suspended, and the C+ of the stator excitation coil winding component is applied with a positive voltage; Step 6: Energize the C-phase and B-phase stator coil windings: The A+ terminal of the stator excitation coil winding component is suspended, the B+ terminal of the stator excitation coil winding component is grounded, and a positive voltage is applied to the C+ terminal of the stator excitation coil winding component. Under the energization control, the stator excitation coil winding component generates a clockwise alternating rotating magnetic field, which provides electromagnetic torque to the rotor permanent magnet component and simultaneously provides contactless power to the rotor power receiving coil winding component.

[0008] The rotor power receiving coil winding component includes a rotor coil support structure, a three-phase rotor coil winding and six rotor silicon steel sheet groups. The rotor coil support structure includes a second outer circumferential ring, a second inner circumferential ring and six second connecting arms. The second inner circumferential ring is coaxially arranged in the second outer circumferential ring. The rotor shaft passes through the second outer circumferential ring coaxially. The second outer circumferential ring is fixedly connected to the rotor shaft. The second outer circumferential ring is fixed to the rotor rotating platform component. The second outer circumferential ring and the second inner circumferential ring are connected and fixed by the six second connecting arms. The six second connecting arms are evenly spaced along the circumference with the rotor shaft as the center. The angle between each two adjacent second connecting arms is 60 degrees. A second assembly space is formed between each two adjacent second connecting arms. Six second assembly spaces are formed between the six second connecting arms. The six rotor silicon steel sheet groups are installed one by one in the six second assembly spaces. Each rotor silicon steel sheet group consists of m silicon steel sheets along the diameter of the second assembly space in which it is located. The three-phase rotor coil winding comprises six rotor sub-coils, and the six rotor sub-coils and the six rotor silicon steel sheets are connected to each other by gluing. The sheet groups correspond one to one, and a corresponding rotor sub-coil is wound on the inner side, left side, outer side and right side of the rotor silicon steel sheet group. One end of the rotor sub-coil is led out from the outer side of the rotor silicon steel sheet group, and the other end is close to the inner side of the rotor silicon steel sheet group. The winding directions of two adjacent rotor sub-coils are opposite, that is, one is clockwise and the other is counterclockwise. The three-phase rotor coil windings are respectively recorded as A-phase rotor coil winding, B-phase rotor coil winding and C-phase rotor coil winding;Any rotor sub-coil with a clockwise winding direction is taken as the first rotor sub-coil. Starting from the first rotor sub-coil, the other five sub-coils in the clockwise direction are the second rotor sub-coil, the third rotor sub-coil, the fourth rotor sub-coil, the fifth rotor sub-coil and the sixth rotor sub-coil. The first rotor sub-coil and the fourth rotor sub-coil constitute the A-phase rotor coil winding. The end of the first rotor sub-coil close to the outer side of the rotor silicon steel sheet group is marked as A+ of the rotor power receiving coil winding component. The fourth rotor sub-coil is marked as A+ of the rotor power receiving coil winding component. One end of the coil close to the outer side of the rotor silicon steel sheet group is recorded as A- of the rotor power receiving coil winding component. The other end of the first rotor sub-coil is connected to the other end of the fourth rotor sub-coil. The second rotor sub-coil and the fifth rotor sub-coil constitute the C-phase rotor coil winding. The end of the second rotor sub-coil close to the outer side of the rotor silicon steel sheet group is recorded as C- of the rotor power receiving coil winding component. The end of the fifth rotor sub-coil close to the outer side of the rotor silicon steel sheet group is recorded as C+ of the rotor power receiving coil winding component. The other end of the rotor sub-coil is connected to the other end of the fifth rotor sub-coil. The third rotor sub-coil and the sixth rotor sub-coil constitute the B-phase rotor coil winding. The end of the third rotor sub-coil close to the outer side of the rotor silicon steel sheet group is marked as B+ of the rotor power receiving coil winding component, and the end of the sixth rotor sub-coil close to the outer side of the rotor silicon steel sheet group is marked as B- of the rotor power receiving coil winding component. The other end of the third rotor sub-coil is connected to the other end of the sixth rotor sub-coil, and the A- of the rotor power receiving coil winding component, the B- of the rotor power receiving coil winding component, and the C- of the rotor power receiving coil winding component are connected. As the rotor shaft rotates, the alternating rotating magnetic field generated by the rotor power receiving coil winding component and the stator excitation coil winding component causes magnetic flux lines to be cut due to relative motion, thereby generating an induced electromotive force on the three-phase rotor coil winding. The induced electromotive force is input into the three-phase rectifier circuit module for rectification and then outputs a DC voltage for powering the power receiving equipment on the rotor rotating platform component. ;

[0009] The rotor permanent magnet component includes a rotor permanent magnet support structure and six permanent magnets. The rotor permanent magnet support structure includes a third outer circumferential ring, a third inner circumferential ring and six third connecting arms. The third inner circumferential ring is coaxially arranged in the third outer circumferential ring. The rotor shaft passes coaxially through the third outer circumferential ring. The third outer circumferential ring is fixedly connected to the rotor shaft. The third outer circumferential ring and the third inner circumferential ring are connected and fixed by the six third connecting arms. The six third connecting arms are evenly spaced along the circumference with the rotor shaft as the center. The angle between each adjacent two third connecting arms is 60 degrees. A third assembly space is formed between each adjacent two third connecting arms. Six third assembly spaces are formed between the six third connecting arms. The six permanent magnets are installed one by one in the six third assembly spaces. Each permanent magnet adopts axial magnetization and its radial cross-section is equal. The isosceles trapezoidal shape is a waist trapezoidal shape, the upper base of the radial cross-section of each permanent magnet faces the third inner circumferential ring, the lower base of the radial cross-section of each permanent magnet faces the third outer circumferential ring, and the two waists of the radial cross-section of each permanent magnet are fixed to the left and right third connecting arms thereof by gluing; the polarities of the magnetic poles of two adjacent permanent magnets facing the same axial direction are opposite, that is, when viewed in the clockwise direction, the polarities of the magnetic poles of the six permanent magnets facing the same axial direction are N pole, S pole, N pole, S pole, N pole, and S pole respectively; the alternating rotating magnetic field generated by the stator excitation coil winding component interacts with the permanent magnet magnetic field generated by the rotor permanent magnet component, thereby generating an electromagnetic torque acting on the rotor permanent magnet component, and under the driving action of the electromagnetic torque, the rotor rotating platform component, the three-phase rectifier circuit module, the rotor power receiving coil winding component, the rotor permanent magnet component and the rotor shaft rotate.

[0010] The rotor shaft is mounted on the stator base platform component through a first bearing, the inner ring of the first bearing is in contact with the rotor shaft, the outer ring of the first bearing is in contact with the stator base platform component, the rotor permanent magnet component and the rotor shaft are axially fixed by a keyway fitting method, the stator excitation coil winding component is fixed to the stator base platform component by a plurality of bolts, a second bearing is provided between the stator excitation coil winding component and the rotor shaft, the inner ring of the second bearing is in contact with the rotor shaft, the outer ring of the second bearing is in contact with the stator excitation coil winding component, the rotor rotating platform component and the rotor shaft are axially fixed by a keyway fitting method, and the rotor power receiving coil winding component and the rotor rotating platform component are axially fixed by a plurality of bolts.

[0011] Compared with the prior art, the advantage of the present invention is that a rotation drive and contactless power supply system based on a single excitation coil is formed by a stator base platform component, a three-phase inverter circuit module, a rotor permanent magnet component, a stator excitation coil winding component, a rotor power receiving coil winding component, a three-phase rectifier circuit module, a rotor rotating platform component and a rotor shaft. When working, the three-phase inverter circuit module is connected to an external DC power supply, and the DC power supply voltage from the external DC power supply output to it is inverted into a three-phase square wave drive voltage and loaded onto the stator excitation coil winding component. The stator excitation coil winding component generates an alternating rotating magnetic field that acts on the rotor permanent magnet component, and interacts with the permanent magnet magnetic field generated by the rotor permanent magnet component, thereby generating an electromagnetic torque loaded on the rotor permanent magnet component. Under the driving action of the electromagnetic torque, the rotor rotating platform component, the three-phase rectifier circuit The module, the rotor power receiving coil winding component, the rotor permanent magnet component and the rotor shaft rotate relative to the stator excitation coil winding component, the three-phase inverter circuit module and the stator base platform component; at the same time, the alternating rotating magnetic field acts on the rotor power receiving coil winding component, causing the magnetic flux size in the rotor power receiving coil winding component to change periodically, thereby generating a three-phase induced electromotive force voltage. The three-phase rectifier circuit module rectifies and transforms the three-phase induced electromotive force voltage and outputs a DC voltage, thereby powering other power receiving devices installed on the rotor rotating platform component and performing synchronous rotation with the rotor rotating platform component. Therefore, the present invention can simultaneously realize the rotation drive and non-contact rotation power supply functions, thereby reducing the number of functional modules in the rotating working condition equipment, reducing its volume, reducing its maintenance cost, and promoting the miniaturization and low cost of the rotating working condition equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the overall structure of the rotary drive and contactless power supply system based on a single excitation coil of the present invention;

[0013] Figure 2 Schematic diagram of the structure of the stator excitation coil winding component of the rotation drive and contactless power supply system based on a single excitation coil of the present invention;

[0014] Figure 3 A schematic diagram of the structure and connection of the A-phase stator coil winding and its stator silicon steel sheet group in the stator excitation coil winding component of the rotary drive and contactless power supply system based on a single excitation coil of the present invention;

[0015] Figure 4 This is a schematic structural diagram of the rotor permanent magnet component of the rotary drive and contactless power supply system based on a single excitation coil of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0017] Example: Figure 1The rotary drive and contactless power supply system based on a single excitation coil is shown, comprising a stator base platform component A1, a three-phase inverter circuit module A2, a rotor permanent magnet component A3, a stator excitation coil winding component A4, a rotor power receiving coil winding component A5, a three-phase rectifier circuit module A6, a rotor rotating platform component A7 and a rotor shaft A8. The rotor rotating platform component A7 is located above the stator base platform component A1. The stator excitation coil winding component A4, the rotor permanent magnet component A3 and the three-phase inverter circuit module A2 are spaced apart in order from top to bottom. The stator excitation coil winding component A4 and the three-phase inverter circuit module A2 are both fixed on the stator base platform component A1. The rotor power receiving coil winding component A5 is fixed on the rotor rotating platform component A1. On the platform component A7, the rotor power receiving coil winding component A5 is located above the stator excitation coil winding component A4, the three-phase rectifier circuit module A6 is located above the rotor power receiving coil winding component A5, and is fixed on the rotor rotating platform component A7, the rotor shaft A8 passes through the rotor rotating platform component A7, the three-phase rectifier circuit module A6, the rotor power receiving coil winding component A5, the stator excitation coil winding component A4, the rotor permanent magnet component A3, the three-phase inverter circuit module A2 and the stator base platform component A1 from top to bottom, the rotor shaft A8 is fixedly connected to the rotor rotating platform component A7, the rotor power receiving coil winding component A5 and the rotor permanent magnet component A3, and the rotor shaft A8 is rotationally connected to the stator base platform component A1. The three-phase inverter circuit module A2 is electrically connected to the stator excitation coil winding component A4 through a cable, and the three-phase rectifier circuit module A6 is electrically connected to the rotor power receiving coil winding component A5 through a cable; when the rotation drive and contactless power supply system are working, the three-phase inverter circuit module A2 is connected to the external DC power supply, and the DC power supply voltage from the external DC power supply output to it is inverted into a three-phase square wave drive voltage and loaded onto the stator excitation coil winding component A4. The stator excitation coil winding component A4 generates an alternating rotating magnetic field that acts on the rotor permanent magnet component A3, and interacts with the permanent magnet magnetic field generated by the rotor permanent magnet component A3, thereby generating an electromagnetic torque loaded on the rotor permanent magnet component A3. During the electromagnetic torque drive, Under the control of the stator, the rotor rotating platform component A7, the three-phase rectifier circuit module A6, the rotor power receiving coil winding component A5, the rotor permanent magnet component A3 and the rotor shaft A8 rotate relative to the stator excitation coil winding component A4, the three-phase inverter circuit module A2 and the stator base platform component A1. At the same time, the alternating rotating magnetic field acts on the rotor power receiving coil winding component A5, causing the magnetic flux in the rotor power receiving coil winding component A5 to change periodically, thereby generating a three-phase induced electromotive force voltage. The three-phase rectifier circuit module A6 rectifies and transforms the three-phase induced electromotive force voltage and outputs a DC voltage, thereby supplying power to other power receiving devices installed on the rotor rotating platform component A7 and rotating synchronously with the rotor rotating platform component A7.

[0018] Example 2: This example is basically the same as Example 1, except that: Figure 2 and Figure 3As shown, the stator excitation coil winding component A4 includes a stator support structure, a three-phase stator coil winding and six stator silicon steel sheet groups Y4-1, Y4-2, Y4-3, Y4-4, Y4-5 and Y4-6. The stator support structure includes a first outer circumferential ring Y1, a first inner circumferential ring Y3 and six first connecting arms Y2-1, Y2-2, Y2-3, Y2-4, Y2-5 and Y2-6. The first inner circumferential ring Y3 is coaxially arranged in the first outer circumferential ring Y1. The rotor shaft A8 passes through the first outer circumferential ring Y1 coaxially. The first outer circumferential ring Y1 is connected to the rotor shaft A8. 8 adopts a rotatable connection method, the first outer circumferential ring Y1 is fixed on the stator base platform component A1, the first outer circumferential ring Y1 and the first inner circumferential ring Y3 are connected and fixed by six first connecting arms Y2-1, Y2-2, Y2-3, Y2-4, Y2-5 and Y2-6, the six first connecting arms are evenly spaced along the circumference with the rotor shaft A8 as the center, the angle between each adjacent two first connecting arms is 60 degrees, a first assembly space is formed between each adjacent two first connecting arms, six first assembly spaces are formed between the six first connecting arms, and the six stator silicon steel sheet groups are one by one. Correspondingly installed in the six first assembly spaces, each stator silicon steel sheet group is composed of n silicon steel sheets stacked radially along the first assembly space in which it is located, and its radial cross-section is an isosceles trapezoid, n is an integer greater than or equal to 2, the upper base of the isosceles trapezoidal radial cross-section of each stator silicon steel sheet group faces the first inner circumferential ring Y3, and the lower base of the isosceles trapezoidal radial cross-section of each stator silicon steel sheet group faces the first outer circumferential ring Y1, and the two waists of the isosceles trapezoidal radial cross-section of each stator silicon steel sheet group are fixed to the left and right two first connecting arms by gluing; the three-phase stator coil winding includes six stator sub-coils, six Each stator sub-coil corresponds to each of the six stator silicon steel sheet groups. In each corresponding stator sub-coil and stator silicon steel sheet group, the stator sub-coil is wound on the inner side, left side, outer side, and right side of the stator silicon steel sheet group. One end of the stator sub-coil is led out from the outer side of the stator silicon steel sheet group, and the other end is close to the inner side of the stator silicon steel sheet group. The winding directions of two adjacent stator sub-coils are opposite, that is, one is clockwise and the other is counterclockwise. The three-phase stator coil windings are respectively recorded as A-phase stator coil winding, B-phase stator coil winding, and C-phase stator coil winding.Any stator sub-coil with a clockwise winding direction is taken as the first stator sub-coil. Starting from the first stator sub-coil, the other five sub-coils in the clockwise direction are the second stator sub-coil, the third stator sub-coil, the fourth stator sub-coil, the fifth stator sub-coil and the sixth stator sub-coil. The first stator sub-coil and the fourth stator sub-coil constitute the A-phase stator coil winding. The end of the first stator sub-coil close to the outer side of the stator silicon steel sheet group is recorded as A+ of the stator excitation coil winding component A4, and the end of the fourth stator sub-coil close to the outer side of the stator silicon steel sheet group is recorded as A- of the stator excitation coil winding component A4. The other end of the first stator sub-coil is connected to the other end of the fourth stator sub-coil. The second stator sub-coil and the fifth stator sub-coil constitute the C-phase stator coil winding, the end of the second stator sub-coil close to the outer side of the stator silicon steel sheet group is recorded as C- of the stator excitation coil winding component A4, the end of the fifth stator sub-coil close to the outer side of the stator silicon steel sheet group is recorded as C+ of the stator excitation coil winding component A4, the other end of the second stator sub-coil is connected to the other end of the fifth stator sub-coil, the third stator sub-coil and the sixth stator sub-coil constitute the B-phase stator coil winding, the end of the third stator sub-coil close to the outer side of the stator silicon steel sheet group is recorded as B+ of the stator excitation coil winding component A4, the end of the sixth stator sub-coil close to the outer side of the stator silicon steel sheet group is recorded as the stator excitation coil winding part The B- of component A4, the other end of the third stator sub-coil and the other end of the sixth stator sub-coil are connected, and the A- of the stator excitation coil winding component A4, the B- of the stator excitation coil winding component A4 and the C- of the stator excitation coil winding component A4 are connected; the three-phase inverter circuit module A2 loads the three-phase stator coil winding with a three-phase square wave drive voltage through the A+, B+ and C+ of the stator excitation coil winding component A4, and adopts a six-step commutation-two-two conduction method to control the power-on of the three-phase stator coil winding. The first step is to energize the A-phase stator coil winding and the B-phase stator coil winding: a positive voltage is applied to the A+ of the stator excitation coil winding component A4, the B+ of the stator excitation coil winding component A4 is grounded, and the C+ of the stator excitation coil winding component A4 is connected. Suspended; the second step is to energize the A-phase stator coil winding and the C-phase stator coil winding: a positive voltage is applied to the A+ of the stator excitation coil winding component A4, the B+ of the stator excitation coil winding component A4 is suspended, and the C+ of the stator excitation coil winding component A4 is grounded; the third step is to energize the B-phase stator coil winding and the C-phase stator coil winding: the A+ of the stator excitation coil winding component A4 is suspended, a positive voltage is applied to the B+ of the stator excitation coil winding component A4, and the C+ of the stator excitation coil winding component A4 is grounded; the fourth step is to energize the B-phase stator coil winding and the A-phase stator coil winding: the A+ of the stator excitation coil winding component A4 is grounded, a positive voltage is applied to the B+ of the stator excitation coil winding component A4, and the C+ of the stator excitation coil winding component A4 is suspended;Step 5: energize the C-phase and A-phase stator coil windings. The A+ terminal of stator excitation coil winding component A4 is grounded, the B+ terminal of stator excitation coil winding component A4 is suspended, and a positive voltage is applied to the C+ terminal of stator excitation coil winding component A4. Step 6: energize the C-phase and B-phase stator coil windings. The A+ terminal of stator excitation coil winding component A4 is suspended, the B+ terminal of stator excitation coil winding component A4 is grounded, and a positive voltage is applied to the C+ terminal of stator excitation coil winding component A4. Under energization control, stator excitation coil winding component A4 generates a clockwise alternating rotating magnetic field, which provides electromagnetic torque to rotor permanent magnet component A3 and simultaneously provides contactless power to rotor power receiving coil winding component A5.

[0019] Embodiment 3: This embodiment is basically the same as the embodiment 2, with the only difference being that: in this embodiment, the rotor power receiving coil winding component A5 includes a rotor coil support structure, a three-phase rotor coil winding and six rotor silicon steel sheet groups, the rotor coil support structure includes a second outer circumferential ring, a second inner circumferential ring and six second connecting arms, the second inner circumferential ring is coaxially arranged in the second outer circumferential ring, the rotor shaft A8 passes through the second outer circumferential ring coaxially, the second outer circumferential ring is fixedly connected to the rotor shaft A8, and the second outer circumferential ring is fixed to the rotor. On the sub-rotating platform component A7, the second outer circumferential ring and the second inner circumferential ring are connected and fixed by six second connecting arms. The six second connecting arms are evenly spaced along the circumference with the rotor shaft A8 as the center. The angle between each two adjacent second connecting arms is 60 degrees. A second assembly space is formed between each two adjacent second connecting arms. Six second assembly spaces are formed between the six second connecting arms. The six rotor silicon steel sheet groups are installed in the six second assembly spaces one by one. Each rotor silicon steel sheet group consists of m silicon steel sheets along the second assembly space where it is located. The three-phase rotor coil winding includes six rotor sub-coils, and the six rotor sub-coils correspond to the six rotor silicon steel sheet groups in a one-to-one manner. In a corresponding rotor sub-coil and a rotor silicon steel sheet group, the rotor sub-coil is wound on the inner side, left side, outer side, and right side of the rotor silicon steel sheet group. One end of the rotor sub-coil is led out from the outer side of the rotor silicon steel sheet group, and the other end is close to the inner side of the rotor silicon steel sheet group. The winding directions of two adjacent rotor sub-coils are opposite, that is, one is clockwise and the other is counterclockwise. The three-phase rotor coil windings are respectively recorded as A-phase rotor coil winding, B-phase rotor coil winding, and C-phase rotor coil winding;Any rotor sub-coil with a clockwise winding direction is taken as the first rotor sub-coil. Starting from the first rotor sub-coil, the other five sub-coils in the clockwise direction are the second rotor sub-coil, the third rotor sub-coil, the fourth rotor sub-coil, the fifth rotor sub-coil and the sixth rotor sub-coil. The first rotor sub-coil and the fourth rotor sub-coil constitute the A-phase rotor coil winding. The end of the first rotor sub-coil close to the outer side of the rotor silicon steel sheet group is marked as A+ of the rotor power receiving coil winding component A5. The fourth rotor sub-coil is marked as A+ of the rotor power receiving coil winding component A5. The end of the rotor sub-coil close to the outer side of the rotor silicon steel sheet group is marked as A- of the rotor power receiving coil winding component A5, the other end of the first rotor sub-coil is connected to the other end of the fourth rotor sub-coil, the second rotor sub-coil and the fifth rotor sub-coil constitute the C-phase rotor coil winding, the end of the second rotor sub-coil close to the outer side of the rotor silicon steel sheet group is marked as C- of the rotor power receiving coil winding component A5, and the end of the fifth rotor sub-coil close to the outer side of the rotor silicon steel sheet group is marked as C- of the rotor power receiving coil winding component A5. +, the other end of the second rotor sub-coil is connected to the other end of the fifth rotor sub-coil, the third rotor sub-coil and the sixth rotor sub-coil constitute the B-phase rotor coil winding, the end of the third rotor sub-coil close to the outer side of the rotor silicon steel sheet group is recorded as B+ of the rotor power receiving coil winding component A5, the end of the sixth rotor sub-coil close to the outer side of the rotor silicon steel sheet group is recorded as B- of the rotor power receiving coil winding component A5, the other end of the third rotor sub-coil is connected to the other end of the sixth rotor sub-coil, the rotor power receiving coil winding A- of component A5, B- of rotor power receiving coil winding component A5, and C- of rotor power receiving coil winding component A5 are connected. Rotor power receiving coil winding component A5 rotates with rotor shaft A8. The alternating rotating magnetic field generated by stator excitation coil winding component A4 undergoes relative motion, causing magnetic flux lines to cut, generating an induced electromotive force in the three-phase rotor coil windings. This induced electromotive force is input into three-phase rectifier circuit module A6 for rectification, which then outputs a DC voltage that is used to power the power receiving equipment on rotor rotating platform component A7.

[0020] Example 4: This example is basically the same as Example 1, except that: in this example, Figure 4As shown, the rotor permanent magnet component A3 includes a rotor permanent magnet support structure and six permanent magnets Z4-1, Z4-2, Z4-3, Z4-4, Z4-5, and Z4-6. The rotor permanent magnet support structure includes a third outer circumferential ring Z1, a third inner circumferential ring Z3, and six third connecting arms Z2-1, Z2-2, Z2-3, Z2-4, Z2-5, and Z2-6. The third inner circumferential ring Z3 is coaxially arranged in the third outer circumferential ring Z1. The rotor shaft A8 passes coaxially through the third outer circumferential ring Z1. The third outer circumferential ring Z1 is fixedly connected to the rotor shaft A8. The third outer circumferential ring Z1 and the third inner circumferential ring Z3 are connected to Z2-1, Z2-2, Z2-3, Z2-4, Z2-5, and Z2-6 through six third connecting arms. The six third connecting arms Z2-1, Z2-2, Z2-3, Z2-4, Z2-5, and Z2-6 are evenly spaced along the circumference with the rotor shaft A8 as the center. The angle between each two adjacent third connecting arms is 60 degrees, and a third assembly space is formed between each two adjacent third connecting arms. The six third connecting arms Z2-1, Z2-2, Z2-3, Z2-4, Z2-5, and Z2-6 are evenly spaced along the circumference with the rotor shaft A8 as the center. 6, six third assembly spaces are formed between the six permanent magnets Z4-1, Z4-2, Z4-3, Z4-4, Z4-5, and Z4-6, and the six permanent magnets Z4-1, Z4-2, Z4-3, Z4-4, Z4-5, and Z4-6 are installed in the six third assembly spaces in a one-to-one correspondence. Each permanent magnet is axially magnetized, and its radial cross-section is an isosceles trapezoid. The upper base of the isosceles trapezoidal radial cross-section of each permanent magnet faces the third inner circumferential ring Z3, and the lower base of the isosceles trapezoidal radial cross-section of each permanent magnet faces the third outer circumferential ring Z1. The two waists of the isosceles trapezoidal radial cross-section of each permanent magnet are fixed to the two third connecting arms on the left and right by gluing; the adjacent two permanent magnets face oppositely. The polarities of the magnetic poles in the same axis are opposite, that is, when observed in the clockwise direction, the polarities of the magnetic poles of the six permanent magnets facing the same axis are N pole, S pole, N pole, S pole, N pole, and S pole respectively; the alternating rotating magnetic field generated by the stator excitation coil winding component A4 interacts with the permanent magnet magnetic field generated by the rotor permanent magnet component A3, thereby generating an electromagnetic torque acting on the rotor permanent magnet component A3. Under the driving action of this electromagnetic torque, the rotor rotating platform component A7, the three-phase rectifier circuit module A6, the rotor power receiving coil winding component A5, the rotor permanent magnet component A3 and the rotor shaft A8 rotate.

[0021] Embodiment 5: This embodiment is basically the same as Embodiment 1, with the only difference being that in this embodiment, the rotor shaft A8 is mounted on the stator base platform component A1 through a first bearing B1, the inner ring of the first bearing B1 contacts and fits with the rotor shaft A8, the outer ring of the first bearing B1 contacts and fits with the stator base platform component A1, the rotor permanent magnet component A3 and the rotor shaft A8 are axially fixed by a keyway fit, the stator excitation coil winding component A4 is fixed to the stator base platform component A1 by a plurality of bolts, a second bearing B2 is provided between the stator excitation coil winding component A4 and the rotor shaft A8, the inner ring of the second bearing B2 contacts and fits with the rotor shaft A8, the outer ring of the second bearing B2 contacts and fits with the stator excitation coil winding component A4, the rotor rotating platform component A7 and the rotor shaft A8 are axially fixed by a keyway fit, and the rotor power receiving coil winding component A5 and the rotor rotating platform component A7 are axially fixed by a plurality of bolts B3.

Claims

1. A rotary drive and contactless power supply system based on a single excitation coil, characterized in that The invention comprises a stator base platform component, a three-phase inverter circuit module, a rotor permanent magnet component, a stator excitation coil winding component, a rotor power receiving coil winding component, a three-phase rectifier circuit module, a rotor rotating platform component and a rotor shaft. The rotor rotating platform component is located above the stator base platform component. The stator excitation coil winding component, the rotor permanent magnet component and the three-phase inverter circuit module are spaced apart from each other from top to bottom. The stator excitation coil winding component and the three-phase inverter circuit module are both fixed on the stator base platform component. The rotor power receiving coil winding component is fixed on the rotor rotating platform component. The rotor power receiving coil winding component is located above the stator excitation coil winding component. The three-phase rectifier circuit module is located on the rotor power receiving coil winding component. The rotor shaft is located above the rotor rotating platform component and is fixed on the rotor rotating platform component. The rotor shaft passes through the rotor rotating platform component, the three-phase rectifier circuit module, the rotor power receiving coil winding component, the stator excitation coil winding component, the rotor permanent magnet component, the three-phase inverter circuit module and the stator base platform component from top to bottom. The rotor shaft is fixedly connected to the rotor rotating platform component, the rotor power receiving coil winding component and the rotor permanent magnet component. The rotor shaft is rotatably connected to the stator base platform component. The three-phase inverter circuit module and the stator excitation coil winding component are electrically connected through cables. The three-phase rectifier circuit module and the rotor power receiving coil winding component are also electrically connected through cables. The stator excitation coil winding component includes a stator support structure, a three-phase stator coil winding and six stator silicon steel sheet groups. The stator support structure includes a first outer circumferential ring, a first inner circumferential ring and six first connecting arms. The first inner circumferential ring is coaxially arranged in the first outer circumferential ring. The rotor shaft passes through the first outer circumferential ring coaxially. The first outer circumferential ring and the rotor shaft are rotatably connected. The first outer circumferential ring is fixed on the stator base platform component. The first outer circumferential ring The first inner circumferential ring is connected and fixed by the six first connecting arms. The six first connecting arms are evenly spaced along the circumference with the rotor shaft as the center. The angle between each two adjacent first connecting arms is 60 degrees. A first assembly space is formed between each two adjacent first connecting arms. Six first assembly spaces are formed between the six first connecting arms. The six stator silicon steel sheet groups are installed in the six first assembly spaces in a one-to-one correspondence. Each stator silicon steel sheet group is composed of n silicon steel sheets stacked along the radial direction of the first assembly space in which it is located. The stator silicon steel sheet group is a stator silicon steel sheet group having a plurality of isosceles trapezoidal radial cross-sections, wherein n is an integer greater than or equal to 2, wherein the upper base of the isosceles trapezoidal radial cross-section of each stator silicon steel sheet group faces the first inner circumferential ring, and the lower base of the isosceles trapezoidal radial cross-section of each stator silicon steel sheet group faces the first outer circumferential ring, and the two waists of the isosceles trapezoidal radial cross-section of each stator silicon steel sheet group are fixed to the left and right first connecting arms thereof by gluing; the three-phase stator coil winding includes six stator sub-coils, and the six stator sub-coils are connected one by one to the six stator silicon steel sheet groups. Correspondingly, in a corresponding stator sub-coil and a stator silicon steel sheet group, the stator sub-coil is wound on the inner side, left side, outer side, and right side of the stator silicon steel sheet group, one end of the stator sub-coil is led out from the outer side of the stator silicon steel sheet group, and the other end is close to the inner side of the stator silicon steel sheet group. The winding directions of two adjacent stator sub-coils are opposite, that is, one is clockwise and the other is counterclockwise; the three-phase stator coil windings are respectively recorded as A-phase stator coil winding, B-phase stator coil winding, and C-phase stator coil winding;Any stator sub-coil with a clockwise winding direction is taken as the first stator sub-coil. Starting from the first stator sub-coil, the other five sub-coils in the clockwise direction are the second stator sub-coil, the third stator sub-coil, the fourth stator sub-coil, the fifth stator sub-coil and the sixth stator sub-coil. The first stator sub-coil and the fourth stator sub-coil constitute the A-phase stator coil winding. The end of the first stator sub-coil close to the outer side surface of the stator silicon steel sheet group is recorded as A+ of the stator excitation coil winding component, and the end of the fourth stator sub-coil close to the outer side surface of the stator silicon steel sheet group is recorded as A- of the stator excitation coil winding component. The other end of the first stator sub-coil is connected to the other end of the fourth stator sub-coil. The second stator sub-coil and the fifth stator sub-coil constitute the C-phase stator coil winding, one end of the second stator sub-coil close to the outer side surface of the stator silicon steel sheet group is recorded as C- of the stator excitation coil winding component, one end of the fifth stator sub-coil close to the outer side surface of the stator silicon steel sheet group is recorded as C+ of the stator excitation coil winding component, the other end of the second stator sub-coil is connected to the other end of the fifth stator sub-coil, the third stator sub-coil and the sixth stator sub-coil constitute the B-phase stator coil winding, one end of the third stator sub-coil close to the outer side surface of the stator silicon steel sheet group is recorded as B+ of the stator excitation coil winding component, and one end of the sixth stator sub-coil close to the outer side surface of the stator silicon steel sheet group is recorded as the stator excitation coil The B- of the winding component, the other end of the third stator sub-coil and the other end of the sixth stator sub-coil are connected, and the A- of the stator excitation coil winding component, the B- of the stator excitation coil winding component and the C- of the stator excitation coil winding component are connected; the three-phase inverter circuit module loads the three-phase stator coil winding with a three-phase square wave drive voltage through the A+, B+ and C+ of the stator excitation coil winding component, and adopts a six-step commutation-two-two conduction method to control the power-on of the three-phase stator coil winding. The first step is to energize the A-phase stator coil winding and the B-phase stator coil winding: a positive voltage is applied to the A+ of the stator excitation coil winding component, the B+ of the stator excitation coil winding component is grounded, and the stator excitation coil winding component is connected to the ground. C+ is suspended; the second step is to energize the A-phase stator coil winding and the C-phase stator coil winding: a positive voltage is applied to the A+ of the stator excitation coil winding component, the B+ of the stator excitation coil winding component is suspended, and the C+ of the stator excitation coil winding component is grounded; the third step is to energize the B-phase stator coil winding and the C-phase stator coil winding: the A+ of the stator excitation coil winding component is suspended, a positive voltage is applied to the B+ of the stator excitation coil winding component, and the C+ of the stator excitation coil winding component is grounded; the fourth step is to energize the B-phase stator coil winding and the A-phase stator coil winding: the A+ of the stator excitation coil winding component is grounded, a positive voltage is applied to the B+ of the stator excitation coil winding component, and the C+ of the stator excitation coil winding component is suspended;Step 5: Energize the C-phase and A-phase stator coil windings. Connect the A+ terminal of the stator excitation coil winding assembly to ground, leave the B+ terminal of the stator excitation coil winding assembly floating, and apply a positive voltage to the C+ terminal of the stator excitation coil winding assembly. Step 6: Energize the C-phase and B-phase stator coil windings. Connect the A+ terminal of the stator excitation coil winding assembly to ground, leave the B+ terminal of the stator excitation coil winding assembly floating, and apply a positive voltage to the C+ terminal of the stator excitation coil winding assembly.

2. A rotary drive and contactless power supply system based on a single excitation coil according to claim 1, characterized in that The rotor power receiving coil winding component includes a rotor coil support structure, a three-phase rotor coil winding and six rotor silicon steel sheet groups. The rotor coil support structure includes a second outer circumferential ring, a second inner circumferential ring and six second connecting arms. The second inner circumferential ring is coaxially arranged in the second outer circumferential ring. The rotor shaft passes through the second outer circumferential ring coaxially. The second outer circumferential ring is fixedly connected to the rotor shaft. The second outer circumferential ring is fixed on the rotor rotating platform component. The second outer circumferential ring and the second inner circumferential ring are connected and fixed by the six second connecting arms. The six second connecting arms are evenly spaced along the circumference with the rotor shaft as the center. The angle between each two adjacent second connecting arms is 60 degrees. A second assembly space is formed between each two adjacent second connecting arms. Six second assembly spaces are formed between the six second connecting arms. The six rotor silicon steel sheet groups are installed in the six second assembly spaces in a one-to-one correspondence. Each rotor silicon steel sheet group is composed of m silicon steel sheets stacked along the radial direction of the second assembly space in which it is located. , and its radial cross-section is an isosceles trapezoid, m is an integer greater than or equal to 2, the upper base of the isosceles trapezoidal radial cross-section of each rotor silicon steel sheet group faces the second inner circumferential ring, the lower base of the isosceles trapezoidal radial cross-section of each rotor silicon steel sheet group faces the second outer circumferential ring, and the two waists of the isosceles trapezoidal radial cross-section of each rotor silicon steel sheet group are fixed to the left and right second connecting arms thereof by gluing; the three-phase rotor coil winding includes six rotor sub-coils, and the six rotor sub-coils are paired with the six rotor silicon steel sheet groups one by one. In a corresponding rotor sub-coil and a rotor silicon steel sheet group, the rotor sub-coil is wound on the inner side, left side, outer side and right side of the rotor silicon steel sheet group, one end of the rotor sub-coil is led out from the outer side of the rotor silicon steel sheet group, and the other end is close to the inner side of the rotor silicon steel sheet group, and the winding directions of two adjacent rotor sub-coils are opposite, that is, one is clockwise and the other is counterclockwise; the three-phase rotor coil windings are respectively recorded as A-phase rotor coil winding, B-phase rotor coil winding and C-phase rotor coil winding;Any rotor sub-coil with a clockwise winding direction is taken as the first rotor sub-coil. Starting from the first rotor sub-coil, the other five sub-coils in the clockwise direction are the second rotor sub-coil, the third rotor sub-coil, the fourth rotor sub-coil, the fifth rotor sub-coil and the sixth rotor sub-coil. The first rotor sub-coil and the fourth rotor sub-coil constitute the A-phase rotor coil winding. The end of the first rotor sub-coil close to the outer side surface of the rotor silicon steel sheet group is recorded as A+ of the rotor power receiving coil winding component. The fourth One end of the rotor sub-coil close to the outer side of the rotor silicon steel sheet group is recorded as A- of the rotor power receiving coil winding component. The other end of the first rotor sub-coil is connected to the other end of the fourth rotor sub-coil. The second rotor sub-coil and the fifth rotor sub-coil constitute the C-phase rotor coil winding. The end of the second rotor sub-coil close to the outer side of the rotor silicon steel sheet group is recorded as C- of the rotor power receiving coil winding component. The end of the fifth rotor sub-coil close to the outer side of the rotor silicon steel sheet group is recorded as C+ of the rotor power receiving coil winding component. , the other end of the second rotor sub-coil is connected to the other end of the fifth rotor sub-coil, the third rotor sub-coil and the sixth rotor sub-coil constitute the B-phase rotor coil winding, the end of the third rotor sub-coil close to the outer side of the rotor silicon steel sheet group is recorded as B+ of the rotor power receiving coil winding component, the end of the sixth rotor sub-coil close to the outer side of the rotor silicon steel sheet group is recorded as B- of the rotor power receiving coil winding component, the other end of the third rotor sub-coil is connected to the other end of the sixth rotor sub-coil, and the rotor power receiving coil winding The A- of the assembly, B- of the rotor power receiving coil winding assembly, and C- of the rotor power receiving coil winding assembly are connected; the rotor power receiving coil winding assembly rotates with the rotor shaft, and the alternating rotating magnetic field generated by the stator excitation coil winding assembly causes magnetic flux lines to cut due to relative motion, thereby generating an induced electromotive force in the three-phase rotor coil winding. The induced electromotive force is input into the three-phase rectifier circuit module for rectification and then outputs a DC voltage for powering the power receiving equipment on the rotor rotating platform assembly.

3. The rotary drive and contactless power supply system based on a single excitation coil according to claim 1, characterized in that The rotor permanent magnet component includes a rotor permanent magnet support structure and six permanent magnets. The rotor permanent magnet support structure includes a third outer circumferential ring, a third inner circumferential ring and six third connecting arms. The third inner circumferential ring is coaxially arranged in the third outer circumferential ring. The rotor shaft passes coaxially through the third outer circumferential ring. The third outer circumferential ring is fixedly connected to the rotor shaft. The third outer circumferential ring and the third inner circumferential ring are connected and fixed by the six third connecting arms. The six third connecting arms are evenly spaced along the circumference with the rotor shaft as the center. The angle between each two adjacent third connecting arms is 60 degrees. A third assembly space is formed between each two adjacent third connecting arms. Six third assembly spaces are formed between the six third connecting arms. The six permanent magnets are installed one by one in the six third assembly spaces. Each permanent magnet adopts axial magnetization and its radial cross-section is isosceles. The upper base of the isosceles trapezoidal radial section of each permanent magnet faces the third inner circumferential ring, and the lower base of the isosceles trapezoidal radial section of each permanent magnet faces the third outer circumferential ring. The two waists of the isosceles trapezoidal radial section of each permanent magnet are fixed to the left and right third connecting arms thereof by gluing. The polarities of the magnetic poles of two adjacent permanent magnets facing the same axial direction are opposite, that is, when viewed in the clockwise direction, the polarities of the magnetic poles of the six permanent magnets facing the same axial direction are N pole, S pole, N pole, S pole, N pole, and S pole respectively. The alternating rotating magnetic field generated by the stator excitation coil winding component interacts with the permanent magnet magnetic field generated by the rotor permanent magnet component, thereby generating an electromagnetic torque acting on the rotor permanent magnet component. Under the driving action of the electromagnetic torque, the rotor rotating platform component, the three-phase rectifier circuit module, the rotor power receiving coil winding component, the rotor permanent magnet component and the rotor shaft rotate.

4. The rotary drive and contactless power supply system based on a single excitation coil according to claim 1, characterized in that The rotor shaft is mounted on the stator base platform component through a first bearing, the inner ring of the first bearing is in contact with the rotor shaft, the outer ring of the first bearing is in contact with the stator base platform component, the rotor permanent magnet component and the rotor shaft are axially fixed by a keyway fit, the stator excitation coil winding component is fixed to the stator base platform component by a plurality of bolts, a second bearing is provided between the stator excitation coil winding component and the rotor shaft, the inner ring of the second bearing is in contact with the rotor shaft, the outer ring of the second bearing is in contact with the stator excitation coil winding component, the rotor rotating platform component and the rotor shaft are axially fixed by a keyway fit, and the rotor power receiving coil winding component and the rotor rotating platform component are axially fixed by a plurality of bolts.

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