Harmonic wave weakening structure optimization motor

Abstract

The utility model discloses a harmonic wave weakening structure optimization motor, relates to the motor technology field, and comprises a stator iron core and a rotor iron core, one side bottom end of the stator iron core is fixedly connected with a non-lead wire side skeleton, one side inner part of the non-lead wire side skeleton is detachably provided with insulation paper, and the other side inner part of the non-lead wire side skeleton is detachably provided with insulation paper. A stator winding is detachably installed in one side of the non-lead-wire side framework, and a lead-wire side support is fixedly installed at the top end of one side of the stator iron core. A stator iron core is arranged as a part of a motor magnetic circuit and a stator winding is placed, in order to reduce eddy current and magnetic hysteresis loss caused by alternating magnetic potential in the iron core, the iron core is formed by stacking silicon steel sheets with different thicknesses according to requirements, each silicon steel sheet is connected through a self-buckling point, and holes in the two sides are matched with a framework for installation; the lead wire side support is integrally formed on the copper coil supporting piece, the insulation protection piece and the PBT resin material at the top of the stator in an injection molding mode and connected with the iron core through bottom clamping points, and branching points are designed to facilitate the stator winding outgoing line leading-out technology.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially relates to a harmonic weakening structure optimization motor. BACKGROUND

[0002] Due to the air gap magnetic field distortion caused by the factors such as the slot effect, magnetic circuit saturation effect and the distribution form of winding of permanent magnet synchronous motor, the back EMF waveform of permanent magnet synchronous motor is distorted, and the original sinusoidal property is lost. This distortion will make the three-phase current of the motor contain a large number of space harmonics. Due to the existence of many current harmonic components in the frequency conversion driving system of the permanent magnet synchronous motor, the torque of the motor is pulsating, which greatly affects the stability of the motor operation. The torque pulsation of the motor will also bring vibration and noise. If the situation is more serious, it may cause resonance of the PMSM frequency conversion system, make the motor magnetic steel deviate, and damage the motor shaft. At the same time, the motor core and winding will have additional loss under the action of harmonic current. These losses will act as heat sources on the motor itself to increase the temperature, and then affect the internal materials and electromagnetic performance parameters of the motor, reduce its efficiency, and thus reduce its control performance. If the temperature further increases to the material temperature limit of the motor, the motor will be damaged. The performance of the motor will be greatly reduced under the action of harmonic current, and thus affect the stability of the permanent magnet synchronous motor frequency conversion speed regulation system. The main sources of current harmonics are time harmonics introduced by the dead time effect or tube voltage drop of inverter circuit and nonlinear factors, and space harmonics introduced by air gap magnetic field distortion caused by the design of the motor itself. SUMMARY

[0003] The utility model discloses a harmonic weakening structure optimization motor.

[0004] To solve the above technical problems, the utility model provides the following technical scheme: a harmonic weakening structure optimization motor, including stator core and rotor core, one side bottom of stator core is fixedly connected with non lead side skeleton, one side inside of non lead side skeleton is detachably installed with insulating paper, one side inside of non lead side skeleton is detachably installed with stator winding, one side top of stator core is fixedly installed with lead side support, one side top of lead side support is fixedly installed with junction box, one side top of junction box is detachably installed with terminal, one side of terminal is fixedly connected with sealing gasket, one side top of terminal is fixedly connected with lead-out wire.

[0005] Preferably, the insulating paper and the stator winding are one-to-one corresponding, the connection relationship between the insulating paper and the stator winding is wrapping connection, the connection relationship between the stator core and the insulating paper is movable clamping, and the connection relationship between the stator core and the stator winding is movable clamping.

[0006] Preferably, one side bottom end of the rotor core is fixedly provided with a first rotor end plate, one side inner portion of the rotor core is detachably provided with a first neodymium-iron-boron permanent magnet, one side top end surface of the rotor core is fixedly provided with a second rotor end plate, and one side inner portion of the rotor core is fixedly provided with a rivet.

[0007] Preferably, the first rotor end plate and the second rotor end plate are identical in structure, the first rotor end plate and the rivet are movably connected, and the second rotor end plate and the rivet are movably connected.

[0008] Preferably, the stator core comprises an inner diameter rotor, a magnetic pole arrangement groove is formed in one side surface of the inner diameter rotor, unequal air gap auxiliary grooves are formed in one side edge surface of the inner diameter rotor, an inner diameter stator is movably arranged on one side surface of the inner diameter rotor, the inner diameter stator comprises a stator groove bottom, a second neodymium-iron-boron permanent magnet is fixedly arranged on one side of the inner diameter rotor, a permanent magnet notch is formed in one side top end surface of the second neodymium-iron-boron permanent magnet, and an air channel lightening hole is formed in one side surface of the inner diameter rotor.

[0009] Preferably, the unequal air gap auxiliary grooves are in plurality, the unequal air gap auxiliary grooves are circumferentially distributed on one side surface of the inner diameter rotor, the inner diameter rotor and the inner diameter stator are movably sleeved, and the air channel lightening hole and the magnetic pole arrangement groove both penetrate one side surface of the inner diameter rotor.

[0010] Compared with the related art, the harmonic weakening structure optimized motor has the following beneficial effects:

[0011] The utility model provides a harmonic weakening structure optimization motor, through setting up stator core as a part of motor magnetic circuit and placing stator winding, in order to reduce the eddy current and hysteresis loss caused by the alternating magnetic potential in the core, the core material is stacked with silicon steel sheets of different thicknesses according to requirements, each silicon steel sheet is connected through a self-buckling point, and the two sides are equipped with a skeleton through the hole matching, the lead side support is supported by the stator top copper coil support and insulation protection, PBT resin material is integrally formed through injection molding, the bottom clamping point is connected with the core, and the design has a wire distribution point to facilitate the stator winding lead-out process. The outside has a wire arrangement groove, which can simultaneously adapt to various winding schemes, and can form insulation isolation to increase the product creepage distance after assembling with the junction box, the insulation paper is one of the insulation components between the motor winding and the core, ensures that the motor has sufficient insulation strength and insulation distance, the wiring terminal and the wiring column bearing unit at the junction box, after the internal mechanism is installed, the insulation impregnated paint is used to isolate the external conductive medium, and the insulation performance of the connecting part is increased. After assembling with the component insulation paper, insulation isolation can be formed to increase the product creepage distance, the sealing gasket is made of HNBR rubber injection molding, and after assembling with the component junction box, a sealed cavity can be formed to ensure that the component terminal is separately isolated and does not contact the motor coolant, and the insulation effect is ensured.

[0012] The utility model provides a harmonic weakening structure optimization motor, through setting up rotor core as a part of motor magnetic circuit and placing rotor electromagnetic block. In order to reduce the eddy current and hysteresis loss caused by the alternating magnetic potential in the core, the core material is stacked with silicon steel sheets of different thicknesses according to requirements, each silicon steel sheet is connected through a self-buckling point, and the two sides are equipped with a skeleton through the hole matching, the lead side support is supported by the stator top copper coil support and insulation protection, PBT resin material is integrally formed through injection molding, the bottom clamping point is connected with the core, and the design has a wire distribution point to facilitate the stator winding lead-out process. The outside has a wire arrangement groove, which can simultaneously adapt to various winding schemes, and can form insulation isolation to increase the product creepage distance after assembling with the junction box, the insulation paper is one of the insulation components between the motor winding and the core, ensures that the motor has sufficient insulation strength and insulation distance, the wiring terminal and the wiring column bearing unit at the junction box, after the internal mechanism is installed, the insulation impregnated paint is used to isolate the external conductive medium, and the insulation performance of the connecting part is increased. After assembling with the component insulation paper, insulation isolation can be formed to increase the product creepage distance, the sealing gasket is made of HNBR rubber injection molding, and after assembling with the component junction box, a sealed cavity can be formed to ensure that the component terminal is separately isolated and does not contact the motor coolant, and the insulation effect is ensured. ACCURACY

[0013] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0014] Figure 2 It is the rotor split structure schematic diagram of the utility model;

[0015] Figure 3 It is the stator core front view structure schematic diagram of the utility model;

[0016] Figure 4 It is the A place amplification structure schematic diagram of the utility model Figure 3 .

[0017] Reference signs: 1, stator core; 2, non-wire side frame; 3, insulation paper; 4, stator winding; 5, lead wire side support; 6, junction box; 7, terminal; 8, sealing gasket; 9, lead-out wire; 10, first rotor end plate; 11, rotor core; 12, first neodymium-iron-boron permanent magnet; 13, second rotor end plate; 14, rivet; 15, inner diameter rotor; 16, magnetic pole arrangement groove; 17, unequal air gap auxiliary groove; 18, inner diameter stator; 19, stator groove bottom; 20, second neodymium-iron-boron permanent magnet; 21, permanent magnet slot; 22, air channel lightening hole. DETAILED DESCRIPTION Example One:

[0018] Please refer to Figures 1-4 The utility model provides a technical scheme: a harmonic weakening structure optimization motor, including stator core 1 and rotor core 11, stator core 1 one side bottom fixedly connected with non-wire side frame 2, the inside detachable mounting of non-wire side frame 2 one side has insulation paper 3, the inside detachable mounting of non-wire side frame 2 one side has stator winding 4, stator core 1 one side top fixedly installed with lead wire side support 5, lead wire side support 5 one side top fixedly installed with junction box 6, junction box 6 one side top detachable mounting has terminal 7, terminal 7 one side fixedly connected with sealing gasket 8, terminal 7 one side top fixedly connected with lead-out wire 9, insulation paper 3 and stator winding 4's position one to one corresponds, insulation paper 3 and stator winding 4's connection relation is wrapped connection, stator core 1 and insulation paper 3's connection relation is movable joint, stator core 1 and stator winding 4's connection relation is movable joint.

[0019] In the embodiment, by setting stator core 1 as a part of motor magnetic circuit and placing stator winding, in order to reduce the eddy current and hysteresis loss caused by alternating magnetic potential in the core, the core material is stacked with different thickness of silicon steel sheet according to the demand, each silicon steel sheet is connected by self buckling point, the holes on both sides are matched with the frame for installation, lead wire side support 5 is supported by copper coil support and insulation protection at the top of stator, PBT resin material is integrally formed by injection molding, is connected with the core through the bottom clamping point, and is designed with a branching point to facilitate the lead-out process of the lead-out wire of the stator winding. The outside is left with a wire arranging groove, which can simultaneously adapt to various winding schemes, and can form insulation isolation after being assembled with junction box 6 to increase the creepage distance of the product. Insulation paper 3 is one of the insulation components between the motor winding and the core, which ensures that the motor has sufficient insulation strength and insulation distance. The terminal at junction box 6 and the terminal post bearing unit, after the internal mechanism is installed, use insulation impregnated paint to isolate external conductive medium and increase the insulation performance of the connection part. After being assembled with the component insulation paper 3, insulation isolation can be formed to increase the creepage distance of the product, and sealing gasket 8 is made of HNBR rubber injection molding, which can form a sealed cavity after being assembled with the component junction box 6 to ensure that the component terminal 7 is isolated and does not contact the motor coolant, thereby ensuring the insulation effect. Example Two:

[0020] Referring to Figures 1-4 The utility model provides a technical scheme: a kind of harmonic weakening structure optimization motor, first rotor end plate 10 is fixedly installed on the one side bottom end of rotor core 11, first neodymium iron boron permanent magnet 12 is detachably installed in the one side inside of rotor core 11, second rotor end plate 13 is fixedly installed on the one side top end surface of rotor core 11, rivet 14 is fixedly installed in the one side inside of rotor core 11, first rotor end plate 10 and second rotor end plate 13 are same in structure, the connection relationship of first rotor end plate 10 and rivet 14 is movable clamping, the connection relationship of second rotor end plate 13 and rivet 14 is movable clamping, stator core 1 includes inner diameter rotor 15, magnetic pole arrangement groove 16 is set on the one side surface of inner diameter rotor 15, unequal air gap auxiliary groove 17 is set on the one side edge surface of inner diameter rotor 15, inner diameter stator 18 is movably installed on the one side surface of inner diameter rotor 15, inner diameter stator 18 includes stator groove bottom 19, second neodymium iron boron permanent magnet 20 is fixedly installed on the one side of inner diameter rotor 15, permanent magnet slot 21 is set on the one side top end surface of second neodymium iron boron permanent magnet 20, air passage lightening hole 22 is set on the one side surface of inner diameter rotor 15, the number of unequal air gap auxiliary groove 17 is several, several unequal air gap auxiliary groove 17 is circumferentially distributed on the one side surface of inner diameter rotor 15, the connection relationship of inner diameter rotor 15 and inner diameter stator 18 is movable sleeve joint, air passage lightening hole 22 and magnetic pole arrangement groove 16 all penetrate the one side surface of inner diameter rotor 15.

[0021] In the embodiment, by setting rotor core 11 as a part of motor magnetic circuit and placing rotor electromagnetic block. In order to reduce the eddy current and hysteresis loss caused by alternating magnetic potential in the core, the core material is stacked with different thickness of silicon steel sheet according to the requirement, each silicon steel sheet is connected by self buckling point, the middle hole is lightened / ventilated to facilitate cooling, each part of rotor is connected by rivet 14, rivet 14 plays a strengthening role after riveting, prevents rotor core from warping, and prevents rotor electromagnetic block from being thrown out during operation.

[0022] Working principle:

[0023] By setting the stator core 1 as part of the motor magnetic circuit and placing the stator winding, in order to reduce the eddy current and hysteresis loss caused by alternating magnetic potential in the core, the core material is stacked with different thickness of silicon steel sheet according to the requirement, each silicon steel sheet is connected by self buckling point, the both sides are opened to match the skeleton installation, the lead side support 5 is supported by the copper coil support and insulation protection on the top of the stator, PBT resin material is integrally formed by injection molding, connected with the core through the bottom clamping point, and designed with a branching point to facilitate the stator winding lead-out process. The outside is left with a wire arrangement groove, which can simultaneously adapt to various winding schemes, and can form insulation isolation to increase the creepage distance of the product after assembly with the junction box 6. The insulation paper 3 is one of the insulation components between the motor winding and the core, which ensures that the motor has sufficient insulation strength and insulation distance. The terminal of the junction box 6 and the terminal post bearing unit, after the internal mechanism is installed, use insulation impregnated paint to isolate external conductive medium and increase the insulation performance of the connection part. After assembly with the component insulation paper 3, insulation isolation can be formed to increase the creepage distance of the product, and the sealing gasket 8 is made of HNBR rubber injection molding, which can form a sealed cavity after assembly with the component junction box 6 to ensure that the component terminal 7 is isolated and not in contact with the motor coolant, ensuring insulation effect;

[0024] By setting the rotor core 11 as part of the motor magnetic circuit and placing the rotor electromagnetic block. In order to reduce the eddy current and hysteresis loss caused by alternating magnetic potential in the core, the core material is stacked with different thickness of silicon steel sheet according to the requirement, each silicon steel sheet is connected by self buckling point, the middle is opened to reduce weight / ventilation for easy cooling, the rotor components are connected by rivets 14, the rivets 14 are riveted to strengthen, prevent the rotor core from warping, and prevent the rotor electromagnetic block from being thrown out during operation;

[0025] The magnetic pole finishing groove 16 is the main component of the "rotor modification" of the project, which optimizes the rotor magnetic circuit. The unequal air gap auxiliary groove 17 is symmetrically distributed on the outer side of the permanent magnet slot opening 21 of each pole, which is composed of three circular arc cuts, and cooperates with the magnetic pole finishing groove 16 and the stator inner diameter 18 to form an unequal air gap, which is the main component of the "air gap modification" of the project. The stator inner diameter 18 is not a perfect circle. The optimal solution is obtained by CAE simulation topology analysis, which is approximately "chevron" shape by splicing two line segments; the stator slot bottom 19 adopts a flat bottom groove structure, the second neodymium iron boron permanent magnet 20, the V-shaped arrangement of the magnetic steel permanent magnet slot opening 21 in the project, the component assembly reserved hole airway weight reduction hole, and the reserved motor coolant flow channel, which also plays a role in weight reduction. Considering the structural strength problem of high-speed rotation of the rotor, the structure design topology analysis disassembles the hole into the existing shape.

Claims

1. A harmonic weakening structure optimized motor, comprising a stator core (1) and a rotor core (11), one side bottom end of the stator core (1) is fixedly connected with a non-lead side framework (2), characterized in that: The non-wire side frame (2) is detachably mounted with an insulating paper (3) on one side, and the non-wire side frame (2) is detachably mounted with a stator winding (4) on one side, the stator core (1) is fixedly installed with a wire side support (5) on one side top end, the wire side support (5) is fixedly installed with a terminal box (6) on one side top end, the terminal box (6) is detachably installed with a terminal (7) on one side top end, the terminal (7) is fixedly connected with a sealing gasket (8) on one side, and the terminal (7) is fixedly connected with a lead-out wire (9) on one side top end.

2. A harmonic weakened construction optimized electric machine according to claim 1, characterized in that, The insulating paper (3) and the stator winding (4) are in one-to-one correspondence, the connection relationship between the insulating paper (3) and the stator winding (4) is wrapping connection, the connection relationship between the stator core (1) and the insulating paper (3) is movable clamping, and the connection relationship between the stator core (1) and the stator winding (4) is movable clamping.

3. A harmonic weakened construction optimized electric machine according to claim 1, characterized in that, The rotor core (11) is fixedly installed with a first rotor end plate (10) on one side bottom end, the rotor core (11) is detachably installed with a first neodymium-iron-boron permanent magnet (12) on one side, the rotor core (11) is fixedly installed with a second rotor end plate (13) on one side top end surface, and the rotor core (11) is fixedly installed with a rivet (14) on one side.

4. A harmonic weakened construction optimized electric machine according to claim 3, characterized in that, The first rotor end plate (10) and the second rotor end plate (13) are the same in structure, the connection relationship between the first rotor end plate (10) and the rivet (14) is movable clamping, and the connection relationship between the second rotor end plate (13) and the rivet (14) is movable clamping.

5. A harmonic weakened construction optimized electric machine according to claim 1, characterized in that, The stator core (1) comprises an inner diameter rotor (15), a magnetic pole arrangement groove (16) is formed in the side surface of the inner diameter rotor (15), unequal air gap auxiliary grooves (17) are formed in the side edge surface of the inner diameter rotor (15), an inner diameter stator (18) is movably installed on the side surface of the inner diameter rotor (15), the inner diameter stator (18) comprises a stator groove bottom (19), a second neodymium-iron-boron permanent magnet (20) is fixedly installed on one side of the inner diameter rotor (15), a permanent magnet slot (21) is formed in the top end surface of the second neodymium-iron-boron permanent magnet (20), and an air channel lightening hole (22) is formed in the side surface of the inner diameter rotor (15).

6. A harmonic weakened construction optimized electric machine according to claim 5, characterized in that, The number of the unequal air gap auxiliary grooves (17) is several, the several unequal air gap auxiliary grooves (17) are circumferentially distributed on the side surface of the inner diameter rotor (15), the connection relationship between the inner diameter rotor (15) and the inner diameter stator (18) is movable sleeving, and the air channel lightening hole (22) and the magnetic pole arrangement groove (16) both penetrate through the side surface of the inner diameter rotor (15).

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