Magnetic type controllable slip ring suitable for matrix motor and motor

Abstract

The invention discloses a magnetic type controllable slip ring suitable for a matrix motor. The magnetic type controllable slip ring comprises a static module, a magnetic module and a rotating module. The static module comprises a signal wire, a power inlet wire, a power outlet wire, a base, a connecting rod and brush wires. The magnetic attraction module comprises an iron core, an electromagnetic coil, a reset spring, an armature and an iron core support. The rotating module comprises a slip ring rotor and a guide rail. The signal line is connected with the electromagnetic coil, electromagnetic force is generated through current, the armature is attracted to drive the connecting rod and the brush wires to rotate, the reset spring can enable the connecting rod to return to the initial position after power failure, and the contact state of the brush wires and the sliding ring is changed. The simple magnetic suction module is adopted, the working state of the slip ring is rapidly, accurately and efficiently controlled, the service life of the slip ring and the motor is prolonged, and the reliability of the slip ring and the motor is improved.

Description

Technical Field

[0001] The invention belongs to the field of motors and slip rings, and in particular relates to a magnetically controlled slip ring and a motor suitable for a matrix motor. Background Art

[0002] In recent years, some new matrix motors with two sets of armature windings on the stator and rotor (such as CN211405627U-a stator and rotor dual armature winding multiple electromagnetic torque single air gap reluctance motor structure, CN211958893U-a stator and rotor dual permanent magnet dual armature winding magnetic field modulation permanent magnet motor structure, etc.) have been proposed. Matrix motors have high torque density and strong fault tolerance, but because the armature windings on the rotor need to be injected with alternating current when working, slip rings must be used. When the armature windings on the rotor are not required to work, the slip rings are still in working state, so the life of the slip rings is constantly consumed and wasted, so the reliability and working life of the motor are reduced.

[0003] "CN111987868A-A Gas Turbine Brushless Excitation Generator Electric Brush Lifting Device" and "CN110729841A-Wound Three-Phase Asynchronous Motor Electric Brush Lifting Device" both use motors to realize the movement of connecting rods or drive shafts, thereby realizing brush lifting. However, this structure is too complicated and large in size. In conventional small and medium-sized motors, due to limited space, the precision slip ring itself is only the size of a fist, and there is no space to install additional servo motors, so traditional methods are not enough to achieve the expected functions. At the same time, this type of motor + mechanical implementation method has a relatively complex structure, high cost, high failure rate, low energy transfer efficiency, and a long actuation feedback path, so it cannot meet the scenarios that require frequent actuation. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a magnetically controlled slip ring and a motor suitable for a matrix motor. The contact state of the slip ring is controlled by a magnetic module to achieve controllable working state of the slip ring. The slip ring has the advantages of simple structure, compact size, low manufacturing cost, simple control and rapid response.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: In a first aspect, the present invention provides a magnetically controlled slip ring suitable for a matrix motor, comprising: a stationary module, a magnetically attracted module and a rotating module; The stationary module includes a connecting rod and a brush wire; one end of the brush wire is connected to the connecting rod; The rotating module comprises a slip ring rotor, on which a guide rail is arranged; the other end of the brush wire is arranged outside the guide rail; The magnetic module is elastically connected to the connecting rod; when the magnetic module is working, the connecting rod rotates to make the brush wire contact with the guide rail, and when the magnetic module is not working, the connecting rod and the brush wire rotate in the opposite direction, and the brush wire is out of contact with the guide rail.

[0006] As a further improvement of the present invention, two connecting rods are provided, the two connecting rods are parallel and arranged along the axial direction of the slip ring rotor, and the magnetic attraction module is arranged between the two connecting rods.

[0007] As a further improvement of the present invention, the magnetic attraction module includes an iron core, an electromagnetic coil, a return spring and an armature; The electromagnetic coil is wound on the iron core; the armature is fixed on the connecting rod, and the two ends of the iron core are respectively connected to a connecting rod through a return spring, and the return spring has an elastic force on the connecting rod.

[0008] As a further improvement of the present invention, a plurality of iron cores are arranged between the two connecting rods, the iron cores and the connecting rods form a rectangular structure, and the brush filaments are arranged on the long sides of the rectangle; The two groups of brush filaments are symmetrically arranged along the rectangular axis.

[0009] As a further improvement of the present invention, the magnetic attraction module also includes an iron core bracket, and the electromagnetic coil is restricted by the iron core bracket to be wound around the iron core.

[0010] As a further improvement of the present invention, the static module further includes a signal line, a power input line and a power output line; The signal line supplies power to the magnetic attraction module, the signal line is connected to the electromagnetic coil, the power input line is connected to the brush wire; the power output line is connected to the winding of the slip ring rotor; the base is arranged on the connecting rod.

[0011] As a further improvement of the present invention, the stationary module further includes a base; the connection points of the signal line and the power output line are both arranged in the base.

[0012] As a further improvement of the present invention, the upper portion of the core support is connected to the bottom portion of the base.

[0013] As a further improvement of the present invention, connectors are provided on both sides of the bottom of the base, and the connectors are rotatably connected to the connecting rod.

[0014] As a further improvement of the present invention, the power outlet lines are provided in multiple groups; The signal line is connected to the controller and powered by a low-voltage module of the controller, or the signal line is directly connected to the stator winding and powered by a high-voltage power supply.

[0015] In a second aspect, the present invention provides a matrix motor, comprising the above-mentioned magnetically controlled slip ring suitable for the matrix motor.

[0016] Compared with the existing technology, it has the following advantages: The signal line of the present invention is connected to the electromagnetic coil, and the electromagnetic force is generated by the current to attract the armature to drive the connecting rod and the brush wire to rotate. The reset spring can return the connecting rod to the initial position after power failure, and change the contact state of the brush wire and the slip ring. The present invention adopts a simple magnetic suction module to achieve rapid, accurate and efficient control of the working state of the slip ring, thereby improving the life and reliability of the slip ring and the motor. The proposed magnetic suction controllable slip ring has a simple and implementable magnetic suction module, which controls the contact state of the slip ring through the magnetic suction module to achieve controllable working state of the slip ring. Compared with other structures, its structure is simpler and its volume is more compact, so it can be installed in the precision slip ring of small and medium-sized motors. At the same time, since the feedback path is shorter, the control response is rapid. By adopting a reset spring, the actuation only needs one direction, which improves the control accuracy and reduces the control difficulty. For the matrix motor, rapid, accurate and efficient control of the working state of the slip ring can be achieved, thereby improving the life and reliability of the slip ring and the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are for explanation purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings: Figure 1 Schematic diagram of system structure of some embodiments of the present invention.

[0018] Figure 2 It is a front view of the system structure of some embodiments of the present invention.

[0019] Figure 3 1 is a top view of some components of the magnetic attraction module according to some embodiments of the present invention.

[0020] Figure 4 Schematic diagram of some embodiments of the present invention connected to a motor system.

[0021] Among them: 11, signal line; 12, power input line; 13, power output line; 14, base; 15, connecting rod; 16, brush wire; 17, connector; 21, iron core; 22, electromagnetic coil; 23, reset spring; 24, armature; 25, iron core bracket; 31, guide rail; 32, slip ring rotor. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0023] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] The "matrix motor" described in the present invention is a new type of motor with armature windings arranged on both the stator and the rotor. This type of motor works based on the principle of magnetic field modulation and can generate multiple torque components (such as a stator-rotor dual armature winding multiple electromagnetic torque single air gap reluctance motor structure of China Patent Publication No. CN211405627U, a stator-rotor dual permanent magnet dual armature winding magnetic field modulation permanent magnet motor structure of China Patent Publication No. CN211958893U, a doubly fed electric excitation synchronous motor of China Patent Publication No. CN110071614B, etc.). When the stator winding works alone, the motor can output torque. When the rotor winding works alone, the motor can also output torque. When the stator winding and the rotor winding are in the working room at the same time, the motor can output a larger torque. The matrix motor has multiple working modes, so the rotor winding frequently changes the working state to adapt to changes in working conditions.

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figures 1 to 3As shown, the magnetically controlled slip ring suitable for the matrix motor proposed in the present invention can be divided into a static module, a magnetic module and a rotating module according to the function. The static module includes a signal line 11, a power input line 12, a power output line 13, a base 14, a connecting rod 15, a brush wire 16, and a connector 17. The magnetic module includes an iron core 21, an electromagnetic coil 22, a reset spring 23, an armature 24, and an iron core bracket 25. The rotating module includes a guide rail 31 and a slip ring rotor 32.

[0028] The magnetically controlled slip ring for matrix motors proposed in the present invention has a working principle based on the mechanism of electromagnetic attraction and spring return, combined with mechanical structure design, to achieve dynamic contact and disconnection control of the motor slip ring. The specific principle is described as follows: In the static module, the signal line 11 provides current to the electromagnetic coil 22 in the magnetic module. By controlling the presence and size of the current, the strength of the magnetic field generated by the electromagnetic coil can be controlled, thereby controlling the working state of the magnetic module. The power input line 12 is directly connected to the brush wire 16, and is used to transmit electrical energy from the static part to the rotating part, that is, the guide rail 31. The power output line 13 is directly connected to the guide rail 31 on the slip ring rotor 32 to achieve the output of electrical energy. The base 14 serves as the supporting basis for the various components of the static part, ensuring the stability and reliability of the entire structure, and serves as the connecting part for fixing the cable. The connecting rod 15 connects the brush wire 16 and the armature 24 to achieve mechanical transmission during electromagnetic attraction and spring reset. When the brush wire 16 contacts the guide rail 31, the transmission of electrical energy is achieved.

[0029] In the magnetic attraction module, the iron core 21 serves as a support for the electromagnetic coil 22, and together with the electromagnetic coil, it forms an electromagnet, generating a magnetic field that attracts the armature 24. When the electromagnetic coil 22 is energized, it generates a magnetic field, attracting the armature 24, causing the connecting rod 15 and the brush wire 16 to rotate a certain angle and contact the guide rail 31. When the electromagnetic coil is de-energized, the return spring 23 provides elastic force to cause the armature 24, the connecting rod 15 and the brush wire 16 to rotate in the opposite direction and break away from the guide rail 31. The armature 24 is attracted by the electromagnetic coil 22 and is connected to the brush wire 16 through the connecting rod 15. The iron core bracket 25 supports the iron core 21 and the electromagnetic coil 22 to ensure their stability and position accuracy.

[0030] In the rotating module, the guide rail 31 is arranged on the slip ring rotor 32, and realizes the transmission of electric energy when it contacts the brush wire 16. The slip ring rotor 32 is the rotating part of the motor, on which the guide rail 31 and the winding of the slip ring rotor 32 are arranged.

[0031] The working principle of the present invention is as follows: when the signal line 11 is powered on, the electromagnetic coil 22 generates a magnetic field, attracting the armature 24, causing the connecting rod 15 and the brush wire 16 to rotate a certain angle and contact the guide rail 31, thereby realizing the transmission of electric energy. At this time, the reset spring 23 is compressed. When the signal line 11 is powered off, the magnetic field of the electromagnetic coil 22 disappears, and the elastic force of the reset spring 23 causes the armature 24, the connecting rod 15 and the brush wire 16 to rotate in the opposite direction, breaking contact with the guide rail 31, thereby disconnecting the transmission of electric energy.

[0032] Magnetic controllable slip ring has significant advantages such as dynamic control, compact structure, high reliability, easy maintenance, strong adaptability, energy saving and high efficiency, and intelligent control. These advantages make the slip ring have a wide range of application prospects and market demand in various motor drive systems.

[0033] like Figure 2 As shown, the guide rail 31 is arranged on the slip ring rotor 32, and a plurality of guide rails are arranged. The brush wire 16 is connected to the connecting rod 15, and the connecting rod 15 is arranged in the guide rail 31. The base 14 is a supporting base for each element of the stationary part, and is connected to each element of the stationary part.

[0034] like Figure 3 As shown, two connecting rods 15 are arranged in parallel and axially along the slip ring rotor 32, two spaced-apart iron cores 21 are arranged between the two connecting rods 15, the iron core 21 is connected to the connecting rod 15 through an armature 24, an electromagnetic coil 22 is arranged on the iron core 21, and a return spring 23 is arranged between the iron core 21 and the armature 24.

[0035] The base 14 is disposed on two connecting rods 15. The signal line 11 supplies power to the magnetic attraction module, and is specifically directly connected to the electromagnetic coil 22. The signal line 11 controls the working state of the magnetic attraction module through current.

[0036] The power inlet line 12 supplies power to the slip ring, and is specifically directly connected to the brush wire 16. Furthermore, the other end of the power inlet line 12 is connected to a power converter.

[0037] The power outgoing line 13 is directly connected to the guide rail 31 on the slip ring rotor 32. Furthermore, the other end of the power incoming line 12 is connected to the motor rotor winding.

[0038] The electromagnetic coil 22 is wound on the iron core 21, and is fixed to the base 14 together with the iron core 21 by the iron core bracket 25. The upper part of the iron core bracket 25 is connected to the bottom of the base 14, and the iron core bracket 25 supports the base 14. The connecting rod 15 connects the armature 24 and the brush wire 16, and the connecting rod 15 can rotate within a small angle range under the action of force. The armature 24 is fixed on the connecting rod 15, and is installed face to face with the electromagnetic coil 22, the iron core 21 and the return spring 23. The return spring 23 is bonded to the iron core 21 and is installed face to face with the armature 24. The return spring 23 has elastic force on the connecting rod 15.

[0039] When the magnetic module is working, the connecting rod 15 is attracted and rotates a certain angle, the brush wire 16 contacts the guide rail 31, and the return spring 23 is compressed. When the magnetic module is not working, the return spring 23 is restored, the armature 24, the connecting rod 15 and the brush wire 16 rotate in the opposite direction by a certain angle, and the brush wire 16 is out of contact with the guide rail 31.

[0040] As a further improvement of the present invention, the return spring 23 can be arranged outside the connecting rod 15 and the armature 24, and the return spring 23 has a pulling force on the connecting rod 15. When the magnetic module is working, the connecting rod 15 is attracted and rotated by a certain angle, the brush wire 16 contacts the guide rail 31, and the return spring 23 is stretched. When the magnetic module is not working, the return spring 23 is restored, the armature 24, the connecting rod 15 and the brush wire 16 rotate in the opposite direction by a certain angle, and the brush wire 16 is out of contact with the guide rail 31.

[0041] As a further improvement of the present invention, the magnetic attraction module can be provided with multiple groups of redundancy to ensure reliability.

[0042] like Figure 4 As shown, in some embodiments, the signal line 11 can be connected to the controller and powered by the low-voltage module of the controller. As a further improvement of the present invention, the signal line 11 can also be directly connected to the stator winding and powered by high voltage.

[0043] In some embodiments, one or more turns are taken from the coil of the stator winding as the signal line 11, which is directly connected to the electromagnetic coil 22. The power inlet line 12 supplies power to the slip ring and is directly connected to the brush wire 16. Furthermore, the other end of the power inlet line 12 is connected to the rotor power converter. The brush wire 16 is arranged in a direction tangent to the slip ring rotor 32, and the guide rail 31 on the slip ring rotor 32 is provided with a plurality of circular grooves along the circumferential direction.

[0044] As an example, two iron cores 21 are arranged between two connecting rods 15 , and the iron cores 21 and the connecting rods 15 form a rectangular structure, and the brush filaments 16 are arranged on the long sides of the rectangle; two groups of brush filaments 16 are symmetrically arranged along the axis of the rectangle.

[0045] The brush wires 16 are arranged in an eight-shaped pattern on both sides, and move uniformly toward the guide rail 31 under the action of magnetic attraction, so that the guide rail 31 contacts the brush wires 16. A plurality of brush wires 16 are provided on the same side, and are arranged as needed, specifically the same number as the guide rail 31.

[0046] As a further improvement of the present invention, the power outlet line 13 may be provided with multiple groups of redundancy to ensure reliability.

[0047] In some embodiments, the signal line 11 needs two or more lines, and the number of power lines 12 is flexibly adjusted according to the voltage, current and power required by the slip ring. The connection points of the signal line 11 and the power line 13 are both arranged in the base 14 .

[0048] The connecting rod 15 connects the armature 24 and the brush wire 16, and is axially connected to the base 14. The connecting rod 15 can drive the brush wire 16 to rotate within a small angle range under the action force, mainly serving the purpose of driving.

[0049] In some embodiments, the connecting rod 15 is made of light insulating material, and the armature 24 is completely insulated from the brush wire 16 to prevent leakage caused by contact between the two. The armature 24 is fixed on the connecting rod 15 and is installed face to face with the iron core 21, the electromagnetic coil 22 and the return spring 23.

[0050] In some embodiments, the armature 24 and the connecting rod 15 may be connected by riveting, welding, bonding, etc.

[0051] In some embodiments, the material of the armature 24 can be selected from low carbon steel, electrical pure iron, Permalloy, silicon steel sheet, iron-cobalt alloy, etc.

[0052] As a specific solution, connectors 17 are provided on both sides of the bottom of the base 14, and the connectors 17 are rotatably connected to the connecting rod 15. This allows the connector 17 to be connected to the connecting rod 15 and to rotate after an external force is generated. The connector 17 can be a buckle, with the upper part fixed to the bottom of the base 14 and the buckle mouth part of the lower part axially connected to the connecting rod 15. The connecting rod 15 can rotate along the buckle.

[0053] When the magnetic module is working, the connecting rod 15 is attracted and generates a pulling force. Under the action of the pulling force, the connecting rod 15 rotates a certain angle (a very small angle can be achieved), driving the brush wire 16 to contact the guide rail 31, thereby conducting, and compressing the reset spring 23. When the magnetic module is not working, the reset spring 23 is restored, the armature 24, the connecting rod 15 and the brush wire 16 rotate in the opposite direction by a certain angle, and the brush wire 16 is out of contact with the guide rail 31.

[0054] The return spring 23 can be arranged outside the connecting rod 15 and the armature 24, and the return spring 23 has a pulling force on the connecting rod 15. When the magnetic module is working, the connecting rod 15 is attracted and rotated by a certain angle, the brush wire 16 contacts the guide rail 31, and the return spring 23 is stretched. When the magnetic module is not working, the return spring 23 is restored, the armature 24, the connecting rod 15 and the brush wire 16 rotate in the opposite direction by a certain angle, and the brush wire 16 is out of contact with the guide rail 31.

[0055] In summary, the present invention improves the traditional slip ring and proposes a magnetically controlled slip ring. This new slip ring has a simple and implementable magnetic module, which controls the contact state of the slip ring through the magnetic module, so that the working state of the slip ring can be controlled. It has a simple structure and can be installed in the slip ring of small and medium-sized motors. This type of precision slip ring is only the size of a normal person's fist, or even smaller, and there is no space for additional installation of an actuating mechanism. However, the structure proposed by the present invention is small in size and occupies very little space, so it can be set in a precision slip ring. At the same time, since the feedback path is shorter, the control response is fast. By adopting the reset spring 23, the actuation only needs one direction, which improves the control accuracy and reduces the control difficulty. For a matrix motor with a winding of a slip ring rotor 32, rapid, accurate and efficient control of the working state of the slip ring can be achieved, and the life and reliability of the slip ring and the motor are improved.

[0056] The present invention also provides a matrix motor, comprising the above-mentioned magnetically-attractive controllable slip ring suitable for the matrix motor.

[0057] The invention is applicable to various motors that require AC power supply for the windings of the slip ring rotor 32, and will have broad application prospects in aerospace, polar exploration, wind power generation, ocean navigation, and other applications that have high requirements on the life and reliability of the motor.

[0058] The slip ring realizes dynamic contact and disconnection between the brush wire and the guide rail by energizing and de-energizing the electromagnetic coil. This control method is flexible and rapid, and the transmission state of electric energy can be adjusted at any time as needed. The design of the magnetic module and the rotating module makes the entire slip ring compact and has high space utilization. This design not only reduces the size and weight of the slip ring, but also improves its adaptability in various application scenarios. By setting up multiple groups of redundant magnetic modules, even if one group of modules fails, the other groups can still work normally to ensure stable transmission of electric energy. This redundant design greatly improves the reliability of the system.

[0059] Furthermore, since the design of key components such as the magnetic module and brush wire is relatively simple and easy to disassemble and replace, the slip ring is highly convenient in maintenance. The slip ring is suitable for various matrix motors, and can adapt to different working environments and transmission requirements by adjusting parameters such as the current size and power-on time of the electromagnetic coil. When the present invention does not need to transmit electric energy, the electromagnetic coil is powered off, and the brush wire is out of contact with the guide rail, reducing power loss. At the same time, since the working principle of the magnetic module is based on electromagnetic attraction and spring reset, the entire slip ring has low energy consumption during operation and has high energy efficiency. The slip ring can be combined with various intelligent control systems to realize functions such as remote monitoring and automatic adjustment. This intelligent control not only improves the automation level of the system, but also improves its work efficiency and safety.

[0060] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0062] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the foregoing claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to be a waiver of such subject matter, nor should it be considered that the applicant has not considered such subject matter to be part of the disclosed inventive subject matter.

[0063] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0064] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the foregoing claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to be a waiver of such subject matter, nor should it be considered that the applicant has not considered such subject matter to be part of the disclosed inventive subject matter.

Claims

1. A magnetically controlled slip ring suitable for a matrix motor, characterized in that: include: Static module, magnetic module and rotating module; The stationary module comprises a connecting rod (15) and a brush wire (16); one end of the brush wire (16) is connected to the connecting rod (15); The rotating module comprises a slip ring rotor (32), and a guide rail (31) is arranged on the slip ring rotor (32); the other end of the brush wire (16) is arranged outside the guide rail (31); The magnetic module is elastically connected to the connecting rod (15); when the magnetic module is in operation, the connecting rod (15) rotates so that the brush wire (16) contacts the guide rail (31); when the magnetic module is not in operation, the connecting rod (15) and the brush wire (16) rotate in opposite directions so that the brush wire (16) is out of contact with the guide rail (31).

2. A magnetically controlled slip ring suitable for a matrix motor according to claim 1, characterized in that: Two connecting rods (15) are provided, the two connecting rods (15) are parallel and arranged along the axial direction of the slip ring rotor (32), and the magnetic attraction module is arranged between the two connecting rods (15).

3. The magnetically controlled slip ring suitable for a matrix motor according to claim 2, characterized in that: The magnetic attraction module comprises an iron core (21), an electromagnetic coil (22), a return spring (23) and an armature (24); The electromagnetic coil (22) is wound on the iron core (21); the armature (24) is fixed on the connecting rod (15); the two ends of the iron core (21) are respectively connected to a connecting rod (15) via a return spring (23); the return spring (23) has an elastic force on the connecting rod (15).

4. The magnetically controlled slip ring suitable for a matrix motor according to claim 3, characterized in that: A plurality of iron cores (21) are arranged between the two connecting rods (15), the iron cores (21) and the connecting rods (15) form a rectangular structure, and the brush filaments (16) are arranged on the long sides of the rectangle; The two groups of brush filaments (16) are symmetrically arranged along the rectangular axis.

5. The magnetically controlled slip ring suitable for a matrix motor according to claim 3, characterized in that: The magnetic attraction module further comprises an iron core support (25), and the electromagnetic coil (22) is restricted by the iron core support (25) to be wound around the iron core (21).

6. The magnetically controlled slip ring suitable for a matrix motor according to claim 5, characterized in that: The stationary module further comprises a signal line (11), a power input line (12) and a power output line (13); The signal line (11) supplies power to the magnetic attraction module, the signal line (11) is connected to the electromagnetic coil (22), the power input line (12) is connected to the brush wire (16); the power output line (13) is connected to the winding of the slip ring rotor (32); The stationary module further comprises a base (14); the connection points of the signal line (11) and the power output line (13) are both arranged in the base (14); and the connecting rod (15) is arranged on the base (14).

7. The magnetically controlled slip ring suitable for a matrix motor according to claim 6, characterized in that: The upper portion of the core support (25) is connected to the bottom portion of the base (14).

8. The magnetically controlled slip ring suitable for a matrix motor according to claim 6, characterized in that: Connectors (17) are provided on both sides of the bottom of the base (14), and the connectors (17) are rotatably connected to the connecting rod (15).

9. A magnetically controlled slip ring suitable for a matrix motor according to claim (6), characterized in that: The power outlet lines (13) are provided in multiple groups; The signal line (11) is connected to the controller and powered by a low-voltage module of the controller, or the signal line (11) is also directly connected to the stator winding and powered by a high-voltage power supply.

10. A matrix motor, characterized in that: A magnetically controlled slip ring suitable for a matrix motor comprising the method described in any one of claims 1 to 9.

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