A magnetic levitation motor

Abstract

The invention discloses a magnetic suspension motor, comprising an axle rod, a shaft sleeve, a rotor axial wear-resistant sheet, a sensor mounting groove, a magnetic suspension control structure, a radial magnetic ring, a motor housing, a motor stator and a rotor. The invention provides a magnetic suspension control structure on the inner side of the rotor, wherein an axial sensor is provided inside the structure to detect the floating and descending of the axial magnetic ring, and then the axial coil is controlled according to the inferred and amplified output current, so that the axial coil and the axial magnetic ring change the suspension height of the inferred result, thereby achieving accurate control of the suspension height, solving the friction between the motor shaft sleeve and the axial wear-resistant sheet, and then reducing the friction coefficient, thereby increasing the service life of the motor, thereby making the motor run more smoothly and efficiently.

Description

Technical Field

[0001] The invention relates to the field related to magnetic levitation motors, and in particular to a magnetic levitation motor. Background Art

[0002] Magnetic levitation motor is a special motor with non-contact operation between stator and mover. According to the force of magnetic field, it can be divided into attraction type and repulsion type. According to the degree of magnetic field coupling, it can be divided into independent control type of levitation force and driving force and coupling control type of levitation force and driving force. According to the structure of stator and mover, it can be divided into magnetic levitation rotary motor and magnetic levitation linear motor. It is used in magnetic levitation trains, magnetic levitation bearings and magnetic levitation artificial heart blood pumps.

[0003] The Chinese patent discloses a magnetic levitation motor (publication number: CN 110165824 B), including a rotor shaft, an axial magnetic bearing is coaxially arranged on the outer side of the rotor shaft, the first end of the rotor shaft is the output end, and a magnetic adsorption unit is arranged on the outer side of the second end of the rotor shaft, the magnetic adsorption unit generates an adsorption force on the rotor shaft along its axial direction, and the second end of the rotor shaft is in contact with the magnetic adsorption unit; a sensor for detecting instability of the rotor shaft is also arranged on the outer side of the rotor shaft, and when the rotor shaft is unstable, a control current is passed into the axial magnetic bearing to control the second end of the rotor shaft to separate from the magnetic adsorption unit.

[0004] During the operation of the motor, the axial movement direction of the rotor may change due to changes in load, and it is not easy to accurately control the suspension height of the rotor, which can easily cause friction between the motor sleeve and the axial wear-resistant plate, thereby reducing the service life of the motor and increasing the friction coefficient. At the same time, it also increases the noise and vibration caused by friction, thereby reducing work efficiency. Summary of the invention

[0005] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides a magnetic levitation motor.

[0006] The present invention is implemented as follows: a magnetic suspension motor is constructed, the device includes an axial rod, a sleeve, a rotor axial wear-resistant sheet, a sensor mounting groove, a magnetic suspension control structure, a radial magnetic ring, a motor housing, a motor stator and a rotor, the axial rod is installed in the middle of the sleeve, the lower end of the axial rod is inserted in the middle of the sensor mounting groove, and a rotor axial wear-resistant sheet is arranged on the top of the sensor mounting groove, a magnetic suspension control structure is arranged on the inner side of the sensor mounting groove, a radial magnetic ring and a motor housing are arranged on the inner side of the rotor, and a motor stator is installed and connected on the inner side of the motor housing; the magnetic suspension control structure also includes an axial sensor, an axial coil and an axial magnetic ring, after the axial sensor transmits the detected signal to the axial coil, the axial magnetic ring is pushed by the magnetic direction generated by the axial coil, the axial sensor is installed on the inner side of the left end of the sensor mounting groove, the top of the axial coil is fixed to the rotor, and the axial magnetic ring is installed on the inner side of the rotor.

[0007] Preferably, the detection direction surface of the axial sensor is in a radial relationship with the axial magnetic ring.

[0008] Preferably, the axial coil ring is arranged outside the sensor mounting groove, and the top of the axial coil is fixed to the motor housing.

[0009] Preferably, an annular groove is formed at the top of the sensor installation groove, and a vertical groove is formed at the lower left end of the sensor installation groove.

[0010] Preferably, the axial sensor detects the axial magnetic ring to obtain a Hall voltage, thereby controlling the axial coil by amplifying the voltage.

[0011] Preferably, the axial magnetic ring is fixed to the rotor, and the axial coil output controls the axial magnetic ring so that the entire rotor floats up and down.

[0012] The present invention has the following advantages: The present invention provides a magnetic levitation motor through improvement, which has the following improvements compared with the same type of equipment: Advantages: The magnetic levitation motor described in the present invention has a magnetic levitation control structure on the inner side of the rotor, in which an axial sensor is arranged to detect the floating and descending of the axial magnetic ring, and then the axial coil is controlled according to the inferred and amplified output current, so that the axial coil and the axial magnetic ring change the suspended height of the calculated result, thereby achieving precise control of the suspended height, solving the friction between the motor sleeve and the axial wear-resistant plate, and then reducing the friction coefficient, thereby increasing the service life of the motor, thereby making the motor run more smoothly and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the cross-sectional front view structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the axial magnetic ring suspension jacking of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the axial magnetic ring suspension reset of the present invention.

[0014] The markings in the figure are: shaft rod-1, shaft sleeve-2, rotor axial wear-resistant plate-3, sensor mounting groove-4, magnetic suspension control structure-5, radial magnetic ring-6, motor housing-7, motor stator-8, rotor-9, axial sensor-51, axial coil-52, axial magnetic ring-53. DETAILED DESCRIPTION

[0015] The following will be combined with the attached Figure 1-3 The present invention is described in detail, and the technical solutions in the embodiments of the present invention are clearly and completely described. 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 are within the scope of protection of the present invention.

[0016] See also Figure 1 The present invention provides a magnetic levitation motor through improvement, including an axial rod 1, a sleeve 2, a rotor axial wear-resistant sheet 3, a sensor mounting groove 4, a magnetic suspension control structure 5, a radial magnetic ring 6, a motor housing 7, a motor stator 8 and a rotor 9. The axial rod 1 is installed in the middle of the sleeve 2, the lower end of the axial rod 1 is inserted in the middle of the sensor mounting groove 4, and the top of the sensor mounting groove 4 is provided with a rotor axial wear-resistant sheet 3, the inner side of the sensor mounting groove 4 is provided with a magnetic suspension control structure 5, the top of the sensor mounting groove 4 is provided with an annular groove, and the lower left end of the sensor mounting groove 4 is provided with a vertical groove, the inner side of the rotor 9 is provided with a radial magnetic ring 6 and a motor housing 7, and the inner side of the motor housing 7 is connected with a motor stator 8, and the rotor axial wear-resistant sheet 3 can play a good wear-resistant performance.

[0017] See also Figure 2 and Figure 3The present invention provides a magnetic levitation motor through improvement. The magnetic levitation control structure 5 also includes an axial sensor 51, an axial coil 52 and an axial magnetic ring 53. After the axial sensor 51 transmits the detected signal to the axial coil 52, the magnetic direction generated by the axial coil 52 pushes the axial magnetic ring 53. The axial coil 52 is arranged on the outside of the sensor mounting groove 4, and the top of the axial coil 52 is fixed to the motor housing 7. The axial sensor 51 is installed on the inner side of the left end of the sensor mounting groove 4. The axial sensor 51 detects the axial magnetic ring 53 to obtain a Hall voltage, so as to control the axial coil 52 by amplifying the voltage. The detection direction surface of the axial sensor 51 is in a radial relationship with the axial magnetic ring 53. The axial magnetic ring 53 is fixed to the rotor 9, and the axial coil 52 outputs and controls the axial magnetic ring 53 so that the entire rotor 9 floats up and down. The top of the axial coil 52 is fixed to the rotor 9, and the axial magnetic ring 53 is installed on the inner side of the rotor 9. The axial sensor 51 adopts a Hall sensor.

[0018] The present invention provides a magnetic levitation motor through improvement, and its working principle is as follows: First, the present invention uses the Hall sensor 51 to detect the axial magnetic ring 53 to obtain the Hall voltage, and amplifies and infers the voltage to control the axial coil 52, thereby changing the magnetic force and magnetic direction of the axial coil 52, thereby controlling the axial suspension height of the axial magnetic ring 53 in the rotor 9, thereby solving the friction between the motor sleeve 2 and the rotor axial wear-resistant plate 3; Second, when the axial sensor 51 detects that the axial magnetic ring 53 is floating, the Hall voltage of the axial magnetic ring 53 is detected, and then the output current is used to control the axial coil, so that the axial coil 52 and the axial magnetic ring 53 are in the magnetic direction of opposite attraction, so that the axial magnetic ring 53 is pulled back to the floating height of the calculated result; Third, on the contrary, when the Hall sensor 51 detects that the axial magnetic ring 53 is floating downward, the principle is the same as above, so that the axial coil 52 and the axial magnetic ring 53 are in the same magnetic direction of repulsion, and then the axial magnetic ring 53 is pushed back to the floating height of the inferred structure; Fourthly, the wear effect of the rotor axial wear-resistant sheet 3 and the shaft sleeve 2 in the rotor 9 is reduced, and the noise and vibration generated by friction are further reduced, so that the motor runs more smoothly and efficiently.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0023] The above shows and describes the basic principle, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0024] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A magnetic suspension motor, comprising a shaft rod (1), a shaft sleeve (2), a rotor axial wear-resistant sheet (3), a sensor mounting groove (4), a magnetic suspension control structure (5), a radial magnetic ring (6), a motor housing (7), a motor stator (8) and a rotor (9), wherein the shaft rod (1) is mounted in the middle of the shaft sleeve (2), the lower end of the shaft rod (1) is plugged into the middle of the sensor mounting groove (4), and the top of the sensor mounting groove (4) is provided with a rotor axial wear-resistant sheet (3), the inner side of the sensor mounting groove (4) is provided with a magnetic suspension control structure (5), the inner side of the rotor (9) is provided with a radial magnetic ring (6) and a motor housing (7), and the inner side of the motor housing (7) is connected with the motor stator (8); Features: The magnetic suspension control structure (5) further comprises an axial sensor (51), an axial coil (52) and an axial magnetic ring (53); the axial sensor (51) transmits a detected signal to the axial coil (52), and then the axial magnetic ring (53) is pushed by the magnetic direction generated by the axial coil (52); the axial sensor (51) is installed on the inner side of the left end of the sensor installation slot (4); the top of the axial coil (52) is fixed to the rotor (9); and the axial magnetic ring (53) is installed on the inner side of the rotor (9).

2. A magnetic levitation motor according to claim 1, characterized in that: The detection direction surface of the axial sensor (51) is in a radial relationship with the axial magnetic ring (53).

3. The magnetic levitation motor according to claim 1, characterized in that: The axial coil (52) is arranged in a ring outside the sensor installation groove (4), and the top of the axial coil (52) is fixed to the motor housing (7).

4. The magnetic levitation motor according to claim 1, characterized in that: The top of the sensor installation groove (4) is provided with an annular groove, and the lower left end of the sensor installation groove (4) is provided with a vertical groove.

5. The magnetic levitation motor according to claim 1, characterized in that: The axial sensor (51) detects the axial magnetic ring (53) to obtain a Hall voltage, thereby controlling the axial coil (52) by amplifying the voltage.

6. The magnetic levitation motor according to claim 1, characterized in that: The axial magnetic ring (53) is fixed to the rotor (9), and the axial coil (52) outputs and controls the axial magnetic ring (53) so that the entire rotor (9) floats up and down.

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