Rare earth permanent magnet magnetic levitation AC and DC motor

Abstract

The invention discloses a rare earth permanent magnet magnetic suspension AC / DC motor, wherein the rotor is located inside the stator; a plurality of stator magnets are evenly distributed in the inner ring of the stator, and a plurality of rotor magnets are evenly distributed in the outer ring of the rotor; the magnetic poles of the stator magnets on the side adjacent to the rotor magnets are the same; a stator core is arranged between every two stator magnets, the stator core is fixed to the inner ring of the stator, and the axial direction of the stator core is along the diameter direction of the stator; an input DC three-phase winding is wound on the stator core, that is, the first stator core is wound with a DC first phase U, the second stator core adjacent to the first stator core is wound with a DC second phase V, and the third stator core adjacent to the second stator core is wound with a DC third phase W, and the U, V, and W input ends are set as the same-name ends, and the first group of U, V, and W windings are connected with the same-name ends of the second group of U, V, and W windings, and circulate in sequence. The invention reduces the friction loss of the motor operation, and the motor has high working efficiency and low loss.

Description

Technical Field

[0001] The invention relates to the field of motors, in particular to a rare earth permanent magnet magnetic suspension AC / DC motor. Background Art

[0002] A motor is an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction, or converts one form of electrical energy into another. An electric motor converts electrical energy into mechanical energy (commonly known as a motor), and a generator converts mechanical energy into electrical energy. The electric motor is represented by the letter "M" (the old standard uses "D") in the circuit. Its main function is to generate driving torque as a power source for electrical appliances or various machines. An electric motor is a power device that converts electrical energy into mechanical energy. It uses an energized coil to generate a rotating magnetic field and acts on the rotor (such as a squirrel cage closed aluminum frame) to form a magnetic electromotive force rotating torque, thereby driving the motor shaft to rotate. The electric motor has high working efficiency, no smoke, odor, no environmental pollution, low noise, and is very convenient to use and control. It can meet various operating requirements and is widely used in industrial and agricultural production, transportation, national defense, commercial and household appliances, medical electrical equipment, etc. There are many varieties of electric motors with various functions to meet various usage requirements. With the advancement of technology, the requirements for electric motors are getting higher and higher. Among them, there are requirements for motor performance and functional requirements for adaptability to the use occasion. Existing conventional motors have low working efficiency, large losses, and difficulty in heat dissipation. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a rare earth permanent magnet magnetic levitation AC and DC motor, which adopts the design principle that like magnets repel each other, so that the stator and rotor are relatively magnetically suspended. When the rotor rotates, the stator magnet pushes the rotor to reduce the friction loss of the motor operation, so that the motor has high working efficiency and low loss; it can also generate electricity while outputting power.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A rare earth permanent magnet magnetic suspension AC / DC motor, comprising a stator, a stator magnet, a stator core, a rotor and a rotor magnet; the rotor is located inside the stator; a plurality of stator magnets are evenly distributed on the inner ring of the stator, and a plurality of rotor magnets are evenly distributed on the outer ring of the rotor; the magnetic poles of the stator magnets on the side adjacent to the rotor magnets are the same; a stator core is arranged between every two stator magnets, the stator core is fixed to the inner ring of the stator, and the axial direction of the stator core is along the diameter direction of the stator; an input DC three-phase winding is wound on the stator core, and has the following winding method: the first stator The iron core is wound with a first phase U of DC, the second stator core adjacent to the first stator core is wound with a second phase V of DC, the third stator core adjacent to the second stator core is wound with a third phase W of DC, the fourth stator core adjacent to the third stator core is wound with a first phase U of DC, the fifth stator core adjacent to the fourth stator core is wound with a second phase V of DC, and the sixth stator core adjacent to the fifth stator core is wound with a third phase W of DC. The U, V, and W input terminals are set as terminals with the same name, and the opposite-name terminals of the first group of U, V, and W windings are connected to the same-name terminals of the second group of U, V, and W windings, and the cycle is repeated in sequence.

[0006] Furthermore, it also includes an output AC three-phase winding, with four adjacent stator cores forming a group of virtual output cores, each group of virtual output cores is wound with an output closed coil, and the A, B, and C output terminals are set as like-name terminals, and the opposite-name terminals of the first group of A, B, and C windings are connected to the like-name terminals of the second group of A, B, and C windings so that the output closed coils of the same output phase are connected in series.

[0007] Furthermore, the stator is a magnetic steel ring or the stator and the stator core are made of silicon steel to form an integral whole.

[0008] Furthermore, the stator core is a silicon steel core.

[0009] Furthermore, the number of the stator magnets is 12*N, where N represents a natural number.

[0010] Furthermore, the stator of the rare earth permanent magnet magnetic suspension AC / DC motor is provided with motor lead wires, a stator end cover is fixed on one side of the stator, and the rotor is connected to a rotor connecting shaft.

[0011] Furthermore, the stator end cover is fixed to the side surface of the stator by bolts.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: in a motor adopting the present structure, the corresponding magnets of the stator and the rotor have the same polarity as the N pole, and the distance between the rotor magnet and the stator magnet depends on the S pole induced by the rotor magnets. The S pole has no effect on the stator magnet but only has repulsive force to reduce the friction loss of the motor operation, so that the motor has high working efficiency and low loss; and it generates electricity while outputting power. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the internal structure of the rare earth permanent magnet magnetic suspension AC and DC motor of the present invention.

[0014] Figure 2 The present invention is a schematic diagram of the structure of the rare earth permanent magnet magnetic suspension AC / DC motor input DC three-phase winding.

[0015] Figure 3 The diagram is a schematic diagram of the expansion of the input DC three-phase winding of the rare earth permanent magnet magnetic suspension AC / DC motor of the present invention.

[0016] Figure 4 It is a schematic diagram of the DC U-phase winding of the rare earth permanent magnet magnetic suspension AC / DC motor of the present invention.

[0017] Figure 5 It is a schematic diagram of the DC V-phase winding of the rare earth permanent magnet magnetic suspension AC / DC motor of the present invention.

[0018] Figure 6 It is a schematic diagram of the DC W-phase winding of the rare earth permanent magnet magnetic suspension AC / DC motor of the present invention.

[0019] Figure 7 It is a schematic diagram of the output AC three-phase winding of the rare earth permanent magnet magnetic suspension AC / DC motor of the present invention.

[0020] Figure 8 It is a development diagram of the output AC three-phase winding of the rare earth permanent magnet magnetic suspension AC / DC motor of the present invention.

[0021] Fig. 9 This is the overall appearance diagram of the rare earth permanent magnet magnetic suspension AC and DC motor of the present invention.

[0022] In the figure: 1-stator; 2-stator magnet; 3-stator core; 4-rotor; 5-rotor magnet; 6-motor lead wire; 7-bolt; 8-rotor connecting shaft; 9-stator end cover; O represents the center point of the DC three-phase winding; U, V, W (the meanings are the same when accompanied by numbers, but they are in different device positions for ease of description) respectively represent the Y-connected DC three-phase input winding; A, B, C (the meanings are the same when accompanied by numbers, but they are in different device positions for ease of description) and O represent the center point of the AC three-phase and respectively represent the three-phase four-wire Y-connected output AC winding. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] A rare earth permanent magnet magnetic suspension AC / DC motor, comprising a stator 1, a stator magnet 2, a stator core 3, a rotor 4 and a rotor magnet 5; the rotor 4 is located inside the stator 1; a plurality of stator magnets 2 are evenly distributed on the inner ring of the stator 1, and a plurality of rotor magnets 5 are evenly distributed on the outer ring of the rotor 4; the magnetic poles of the stator magnet 2 and the rotor magnet 5 on the side adjacent to each other are the same; a stator core 3 is arranged between every two stator magnets 2, the stator core 3 is fixed to the inner ring of the stator 1, and the axial direction of the stator core 3 is along the diameter direction of the stator 1; The input DC three-phase winding is wound on the upper part, and has the following winding method: the first stator core 3 is wound with the first DC phase U, the second stator core 3 adjacent to the first stator core 3 is wound with the second DC phase V, the third stator core 3 adjacent to the second stator core 3 is wound with the third DC phase W, the fourth stator core 3 adjacent to the third stator core 3 is wound with the first DC phase U, the fifth stator core 3 adjacent to the fourth stator core 3 is wound with the second DC phase V, and the sixth stator core 3 adjacent to the fifth stator core 3 is wound with the third DC phase W, and the cycle is repeated in sequence. The stator and rotor are relatively magnetically suspended to reduce the friction loss of the motor operation, so that the motor has high working efficiency and low loss.

[0026] In the present invention, the stator magnet 2 and the rotor magnet 5 have N poles that repel each other, and the S pole induced between the two rotor magnets 5 does not affect the N pole of the stator magnet 2, but determines the distance between the rotor magnet 5 and the stator magnet 2, while maintaining the maximum repulsive force between the stator magnet 2 and the rotor magnet 5. The rotor 4 is equivalent to a single-pole rotor. The stator magnet 2 and the rotor magnet 5 repel each other, so that the rotor is suspended in the center of the stator. The stator core 3 acts on the N pole and the induced S pole of the rotor magnet 5 to form a rotating magnetic field to rotate the rotor 4. During the rotation of the rotor 4, the stator magnet 2 and the rotor magnet 5 repel each other, so that the rotor increases the torque.

[0027] In the present invention, the DC three-phase winding is expanded Figure 2 , Figure 3 The Y connection of the DC three-phase winding is represented by U, V, and W, and the center point of the DC three-phase winding is represented by O; Figure 4 The DC signal is input from the U terminal to make the U phase winding core N pole and repel the N pole of the rotor magnet 5. The DC signal then passes through the center point O terminal of the DC winding from the V phase to the V terminal to make the V phase winding core S pole, so that the N pole of the rotor magnet 5 and the S pole of the V phase winding core attract each other and move toward the V phase winding. Figure 5 The DC signal is input from the V terminal to make the V phase winding core N pole and repel the N pole of the rotor magnet 5. The DC signal then passes through the center point O terminal of the DC winding from the W phase to the W terminal to make the W phase winding core S pole, so that the N pole of the rotor magnet 5 and the S pole of the W phase winding core attract each other and move toward the W phase winding core. Figure 6The DC signal is input from the W end, making the W phase winding core N pole and repelling the N pole of the rotor magnet 5. The DC signal then passes through the center point O end of the DC winding from the U phase to the U end, making the U phase winding core S pole, so that the N pole of the rotor magnet 5 and the S pole of the U phase winding core are attracted to each other and move toward the U phase winding core. This cycle is repeated to form a rotating magnetic field, causing the rotor 4 to rotate and do work.

[0028] Figure 1 The middle dotted line is the center line and edge line of the coaxial magnets of the stator 1 and the rotor 4. It is assumed that all stator magnets 2 are N-pole corresponding to the direction of the rotor 4, and all rotor magnets 5 are N-pole corresponding to the direction of the stator 1. The magnetic saturation of the S-pole with different magnetic poles induced between adjacent magnets of the stator magnet 2 is about 30% of the N-pole of the magnet, and the effect of this S-pole on the rotor magnet 5 is very small, so that the stator 1 is regarded as a single-pole stator; the magnetic saturation of the S-pole with different magnetic poles induced between adjacent magnets of the rotor magnet 5 is about 30% of the N-pole of the magnet, and the effect of this S-pole on the stator magnet 2 is very small, so that the rotor 4 is regarded as a single-pole rotor. The distance between the stator magnet 2 and the rotor magnet 5 depends on the mutual influence of the induced S-pole on the stator magnet 2 and the rotor magnet 5, and the maximum repulsion between the stator magnet 2 and the rotor magnet 5 must be guaranteed.

[0029] In the present invention, the stator core 3 guides the stator induction magnetic pole S pole toward the rotor magnet 5, and a DC three-phase winding is wound on the stator core 3 to produce alternating N and S poles, which attract and repel the N pole and the induction S pole of the rotor magnet 5 to form a rotating magnetic field to rotate the rotor 4; Figure 7 , Figure 8 The stator core 3 has an AC three-phase winding Y-connected. The rotor 4 causes the AC winding to cut its magnetic lines of force during rotation. The AC three-phase winding is represented by A, B, and C, and the center point of the three-phase winding is represented by O.

[0030] Example 2

[0031] A rare earth permanent magnet magnetic suspension AC / DC motor, comprising a stator 1, a stator magnet 2, a stator core 3, a rotor 4 and a rotor magnet 5; the rotor 4 is located inside the stator 1; a plurality of stator magnets 2 are evenly distributed on the inner ring of the stator 1, and a plurality of rotor magnets 5 are evenly distributed on the outer ring of the rotor 4; the magnetic poles of the stator magnet 2 and the rotor magnet 5 on the side adjacent to each other are the same; a stator core 3 is arranged between every two stator magnets 2, the stator core 3 is fixed to the inner ring of the stator 1, and the axial direction of the stator core 3 is along the diameter direction of the stator 1; The input DC three-phase winding is wound on the upper part, which has the following winding method: the first stator core 3 is wound with the DC first phase U, the second stator core 3 adjacent to the first stator core 3 is wound with the DC second phase V, the third stator core 3 adjacent to the second stator core 3 is wound with the DC third phase W, the fourth stator core 3 adjacent to the third stator core 3 is wound with the DC first phase U, the fifth stator core 3 adjacent to the fourth stator core 3 is wound with the DC second phase V, and the sixth stator core 3 adjacent to the fifth stator core 3 is wound with the DC third phase W, and the cycle is repeated in sequence. It also includes an output AC three-phase winding, with four adjacent stator cores 3 as a group of virtual output cores, each group of virtual output cores is wound with an output closed coil, and the output closed coils of the same output phase are connected in series.

[0032] Example 3

[0033] A rare earth permanent magnet magnetic suspension AC / DC motor, comprising a stator 1, a stator magnet 2, a stator core 3, a rotor 4 and a rotor magnet 5; the rotor 4 is located inside the stator 1; a plurality of stator magnets 2 are evenly distributed on the inner ring of the stator 1, and a plurality of rotor magnets 5 are evenly distributed on the outer ring of the rotor 4; the magnetic poles of the stator magnet 2 and the rotor magnet 5 on the side adjacent to each other are the same; a stator core 3 is arranged between every two stator magnets 2, the stator core 3 is fixed to the inner ring of the stator 1, and the axial direction of the stator core 3 is along the diameter direction of the stator 1; The input DC three-phase winding is wound on the stator 1, which has the following winding method: the first stator core 3 is wound with the first DC phase U, the second stator core 3 adjacent to the first stator core 3 is wound with the second DC phase V, the third stator core 3 adjacent to the second stator core 3 is wound with the third DC phase W, the fourth stator core 3 adjacent to the third stator core 3 is wound with the first DC phase U, the fifth stator core 3 adjacent to the fourth stator core 3 is wound with the second DC phase V, and the sixth stator core 3 adjacent to the fifth stator core 3 is wound with the third DC phase W, and the cycle continues in sequence. The stator 1 is a magnetic steel ring. The stator core 3 is a silicon steel core.

[0034] Example 4

[0035] A rare earth permanent magnet magnetic suspension AC / DC motor, comprising a stator 1, a stator magnet 2, a stator core 3, a rotor 4 and a rotor magnet 5; the rotor 4 is located inside the stator 1; a plurality of stator magnets 2 are evenly distributed on the inner ring of the stator 1, and a plurality of rotor magnets 5 are evenly distributed on the outer ring of the rotor 4; the magnetic poles of the stator magnet 2 and the rotor magnet 5 on the side adjacent to each other are the same; a stator core 3 is arranged between every two stator magnets 2, the stator core 3 is fixed to the inner ring of the stator 1, and the axial direction of the stator core 3 is along the diameter direction of the stator 1; The input DC three-phase winding is wound on the stator core 3, which has the following winding method: the first stator core 3 is wound with the DC first phase U, the second stator core 3 adjacent to the first stator core 3 is wound with the DC second phase V, the third stator core 3 adjacent to the second stator core 3 is wound with the DC third phase W, the fourth stator core 3 adjacent to the third stator core 3 is wound with the DC first phase U, the fifth stator core 3 adjacent to the fourth stator core 3 is wound with the DC second phase V, and the sixth stator core 3 adjacent to the fifth stator core 3 is wound with the DC third phase W, and the cycle is repeated in sequence. The number of the stator magnets 2 is 12*N, where N represents a natural number.

[0036] Example 5

[0037] A rare earth permanent magnet magnetic suspension AC / DC motor, comprising a stator 1, a stator magnet 2, a stator core 3, a rotor 4 and a rotor magnet 5; the rotor 4 is located inside the stator 1; a plurality of stator magnets 2 are evenly distributed on the inner ring of the stator 1, and a plurality of rotor magnets 5 are evenly distributed on the outer ring of the rotor 4; the magnetic poles of the stator magnet 2 and the rotor magnet 5 on the side adjacent to each other are the same; a stator core 3 is arranged between every two stator magnets 2, the stator core 3 is fixed to the inner ring of the stator 1, and the axial direction of the stator core 3 is along the diameter direction of the stator 1; The input DC three-phase winding is wound on the stator 1, which has the following winding method: the first stator core 3 is wound with the first DC phase U, the second stator core 3 adjacent to the first stator core 3 is wound with the second DC phase V, the third stator core 3 adjacent to the second stator core 3 is wound with the third DC phase W, the fourth stator core 3 adjacent to the third stator core 3 is wound with the first DC phase U, the fifth stator core 3 adjacent to the fourth stator core 3 is wound with the second DC phase V, and the sixth stator core 3 adjacent to the fifth stator core 3 is wound with the third DC phase W, and the cycle is repeated in sequence. The stator 1 of the rare earth permanent magnet magnetic suspension AC / DC motor is provided with a motor lead 6, a stator end cover 9 is fixed on one side of the stator 1, and the rotor 4 is connected to the rotor connecting shaft 8; the stator end cover 9 is fixed to the side of the stator 1 by bolts 7.

Claims

1. A rare earth permanent magnet magnetic suspension AC and DC motor, characterized in that: It comprises a stator (1), a stator magnet (2), a stator core (3), a rotor (4) and a rotor magnet (5); the rotor (4) is located inside the stator (1); A plurality of stator magnets (2) are evenly distributed on the inner ring of the stator (1), and a plurality of rotor magnets (5) are evenly distributed on the outer ring of the rotor (4); the magnetic poles of the stator magnets (2) and the rotor magnets (5) on the side adjacent to each other are the same; a stator core (3) is arranged between every two stator magnets (2), the stator core (3) is fixed to the inner ring of the stator (1), and the axial direction of the stator core (3) is along the diameter direction of the stator (1); The magnetic saturation of the stator magnets (2) between adjacent magnets is 30% of the magnets, and the effect of the magnetic poles on the rotor magnets (5) is very small, and the stator (1) is regarded as a single-pole stator; the magnetic saturation of the rotor magnets (5) between adjacent magnets is 30% of the magnets, and the effect of the magnetic poles on the stator magnets (2) is very small, and the rotor (4) is regarded as a single-pole rotor; the stator magnets (2) and the rotor magnets (5) repel each other so that the rotor (4) is suspended at the center of the stator (1); An input DC three-phase winding is wound on the stator core (3), which has the following winding method: a first DC phase U is wound on the first stator core (3), a second DC phase V is wound on the second stator core (3) adjacent to the first stator core (3), a third DC phase W is wound on the third stator core (3) adjacent to the second stator core (3), a first DC phase U is wound on the fourth stator core (3), a second DC phase V is wound on the fifth stator core (3) adjacent to the fourth stator core (3), and a third DC phase W is wound on the fourth stator core (3). The sixth stator core (3) adjacent to the sub-core (3) is wound with a DC third phase W, and the U, V, and W input terminals are set as the same-name terminals, and the first group of U, V, and W winding opposite-name terminals are connected to the second group of U, V, and W winding same-name terminals, and the circuit is circulated in sequence; it also includes an output AC three-phase winding, with the adjacent four stator cores (3) as a group of virtual output cores, each group of virtual output cores is wound with an output closed coil, and the A, B, and C output terminals are set as the same-name terminals, and the first group of A, B, and C winding opposite-name terminals are connected to the second group of A, B, and C winding same-name terminals so that the output closed coils of the same output phase are connected in series.

2. The rare earth permanent magnet magnetic suspension AC / DC motor according to claim 1, characterized in that: The stator (1) is a magnetic steel ring, or the stator (1) and the stator core (3) are made of silicon steel to form an integral whole.

3. The rare earth permanent magnet magnetic suspension AC / DC motor according to claim 1, characterized in that: The stator core (3) is a silicon steel core.

4. The rare earth permanent magnet magnetic suspension AC / DC motor according to claim 1, characterized in that: The number of the stator magnets (2) is 12*N, wherein N represents a natural number.

5. The rare earth permanent magnet magnetic suspension AC / DC motor according to claim 1, characterized in that: The stator (1) of the rare earth permanent magnet magnetic suspension AC / DC motor is provided with a motor lead wire (6), a stator end cover (9) is fixed on one side of the stator (1), and the rotor (4) is connected to a rotor connecting shaft (8).

6. The rare earth permanent magnet magnetic suspension AC / DC motor according to claim 5, characterized in that: The stator end cover (9) is fixed to the side of the stator (1) by means of bolts (7).

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