CN108539880B - A remanufactured permanent magnet motor based on a hybrid stator core and a hybrid rotor core - Google Patents

Abstract

The invention discloses a remanufactured permanent magnet motor based on a mixed stator iron core and a mixed rotor iron core. The mixed stator iron core is divided into a stator iron core outer ring and a stator iron core inner ring and is embedded in a "T" structure. Plug connection; the outer ring of the stator iron core, the inner ring of the stator iron core and the mixed rotor iron core are all arranged in sections along the axial direction, wherein the first rotor stack segment, the first inner ring segment of the stator iron core and the outer ring iron of the stator iron core are arranged in sections along the axial direction. The base amorphous alloy segments are of equal length and are located at the same axial position, the second rotor stack segment, the second stator core inner ring segment and the remanufactured silicon steel segment of the stator core outer ring are of equal length and are located in the same axial direction Positionally, the first rotor stack segment and the first stator core inner ring segment are both remanufactured silicon steel sheet stack segments; the second rotor stack segment and the second stator core inner ring segment are both iron-based amorphous alloy stack segments . The invention effectively improves the performance of the remanufactured motor while making full use of the silicon steel sheet removed from the waste motor.

Description

A remanufactured permanent magnet motor based on a hybrid stator core and a hybrid rotor core

technical field

The invention relates to the field of motor equipment, in particular to a radially coupled hybrid stator iron core and a hybrid rotor iron core and its application in high-power remanufacturing permanent magnet synchronous motors, belonging to the field of motor remanufacturing.

Background technique

Since the 1960s, the global economy has continued to develop at an unprecedented high speed, but it has neglected environmental pollution, which has brought about global warming, ozone layer destruction, acid rain and other negative consequences. Due to the short life cycle and low quality of some consumer goods, the number of waste products has risen sharply. Countries have realized the importance of environmental issues and have proposed environmental governance methods and measures one after another. However, traditional environmental governance methods are the end. Governance cannot fundamentally solve the problem of environmental pollution. To completely solve environmental problems, we must start from the source. Specific to the manufacturing industry, it is necessary to consider the impact of the entire life cycle of the product on the environment, maximize the use of raw materials and energy, reduce the discharge of solid, liquid, gas and other harmful substances, and reduce environmental pollution.

Since the 21st century, due to the energy crisis and environmental degradation, new energy vehicles, as a low-pollution, high-environmentally friendly means of transportation, are highly in line with the country's strategic needs for green development. However, with the vigorous promotion of new energy vehicles, and with the development of new energy vehicles and the passage of time, the pressure on power motor recycling will increase. solved problem.

Chinese patent CN105119396A (published on 2015.12.02) discloses a method for remanufacturing a motor for new energy vehicles. The hybrid laminated stator core is laminated in the axial direction by laminating silicon steel laminations and iron-based amorphous alloys of waste motors in the axial direction. completed and used in remanufactured motors. The remanufactured motor assembled by the hybrid laminated stator core has different magnetization efficiency of each material when operating under the same magnetic field, and the magnetic force received by each section along the axial direction is inevitably uneven, which will affect the stability and safety of the motor movement. Secondly, due to the relatively small saturation magnetic density of amorphous alloys, the iron-based amorphous alloys are separately arranged on the stator along the axial direction. Although the motor loss is reduced, the output torque of the remanufactured motor will be greatly reduced.

Japanese Patent No. 2007-267493 discloses a laminated iron core and a manufacturing method of the iron core, but it adopts the method of laminating different materials such as low-carbon steel sheets, because the electromagnetic properties of low-carbon steel sheets are not ideal, resulting in The hybrid iron core formed by lamination will inevitably weaken the performance, which will lead to a decrease in the performance of the motor.

The iron-based amorphous alloy has superior soft magnetic properties, its permeability and resistance are higher than those of silicon steel, its coercive force and eddy current effect are smaller than those of silicon steel, and its iron loss is only 1/3-1/5 of that of silicon steel. Because its saturation magnetic density is lower than that of silicon steel material, if the iron core is directly replaced with iron-based amorphous alloy material, although the motor loss is reduced, it will cause the torque contraction of the remanufactured motor.

In fact, due to the above situation, the manufacturing of permanent magnet motors is still mainly in the research and development stage.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a remanufactured permanent magnet motor based on a mixed stator iron core and a mixed rotor iron core, which can make full use of the silicon steel sheet removed from the waste motor and make the remanufactured motor Sex is effectively improved.

In order to achieve the above object, the present invention adopts the following technical solutions:

The present invention is characterized in that the remanufactured permanent magnet motor based on the mixed stator iron core and the mixed rotor iron core is: the stator iron core is divided into a stator iron core outer ring and a stator iron core inner ring, the stator iron core outer ring, The inner ring of the stator iron core and the mixed rotor iron core are of mixed lamination structure; between the outer ring of the stator iron core and the inner ring of the stator iron core, a "T"-shaped structure is used for inserting connection;

The outer ring of the stator iron core is arranged in sections along the axial direction. In its axial segmented structure, at least one section of the outer ring of the stator iron core is a remanufactured silicon steel section of the outer ring of the stator iron core, and the remaining part is the outer ring of the stator iron core. Ring iron-based amorphous alloy segment;

The inner ring of the stator iron core is arranged in sections along the axial direction, and the axial segmentation structure includes a first inner ring section of the stator iron core and a second inner ring section of the stator iron core, and the second inner ring section of the stator iron core The length of the remanufactured silicon steel section of the outer ring of the stator iron core is equal to and at the same axial position, and the length of the inner ring section of the first stator iron core and the iron-based amorphous alloy section of the outer ring of the stator iron core are equal in length and in the same axial position;

The hybrid rotor core is arranged in sections along the axial direction, and its axial segment structure includes a first rotor stack segment and a second rotor stack segment, and both ends of the hybrid rotor core are set as the first rotor stack segment , the first rotor stack segment and the first stator core inner ring segment have the same length and are in the same axial position; the second rotor stack segment and the second stator core inner ring segment are of equal length and in the same axial position;

The first rotor stack segment and the first stator core inner ring segment are made of the same material, and both are remanufactured silicon steel sheet stack segments; the second rotor stack segment and the second stator core inner ring segment are made of the same material, All are iron-based amorphous alloy stack segments.

The remanufactured permanent magnet motor based on the hybrid stator core and the hybrid rotor core of the present invention is also characterized in that: for the second rotor lamination segment, the iron-based amorphous alloy lamination model is determined according to the following steps:

Step 1. Determine the following related parameters:

The relevant parameters of the waste permanent magnet motor include: the inner diameter of the stator D _i1 , the length of the air gap g, and the maximum outer diameter of the rotor circle (D _i1 -2g);

The relevant parameters of the remanufactured permanent magnet motor include: the minimum air gap length is δ _min , δ _min =g;

For the rotor outer circle M of the waste permanent magnet motor with the center O: Definition: the center of the eccentric circle of the eccentric slot in the pole is O ₁ , the center of the eccentric circle of the eccentric slot between the poles is O ₂ , and O ₁ is on the single magnetic pole symmetry line A1 The upper and O ₂ are on the symmetry line A2 of the adjacent two magnetic poles, the angle between the center line of the eccentric groove in the pole and the eccentric groove between the poles is τ/2; setting: the depth of the eccentric groove in the pole d ₁ , the eccentric groove between the poles The groove depth d ₂ , the eccentric span angle θ _s1 within the pole, the eccentric span angle θ _s2 between the poles, the single magnetic pole symmetry line A1 is the position of θ _s1 =0, and the adjacent magnetic pole symmetry line A2 is the position of θ _s2 =0;

From formula (1), the eccentricity H ₁ of the eccentric groove in the pole and the eccentricity H ₂ of the eccentric groove between the poles are obtained respectively,

The inner pole eccentric groove radius R _p1 and the interpole eccentric groove radius R _p2 are obtained from formula (2), respectively,

Where: j=1,2;

Step 2. Determine the iron-based amorphous alloy lamination model of the second rotor lamination segment:

Taking O ₁ as the center of the circle and R _p1 as the radius, draw an arc to the sector boundary with an included angle of θ _s1 with the single magnetic pole symmetry line, and then extend radially outward along the rotor outer circle M to the edge of the rotor outer circle M; And, take O ₂ as the center, draw an arc with R _p2 as the radius to the sector boundary where the angle between the symmetry lines of the adjacent two magnetic poles is θ _s2 , and then extend along the radial direction of the rotor outer circle M to the rotor outer circle M , obtain the iron-based amorphous alloy lamination model of the second rotor lamination segment.

The characteristics of the remanufactured permanent magnet motor based on the hybrid stator iron core and the hybrid rotor iron core of the present invention are also that: the “T”-shaped structure insert connection between the outer ring of the stator iron core and the inner ring of the stator iron core is A "T"-shaped protrusion is arranged on the outer circumferential surface of the inner ring of the specified sub-iron core, a "T" groove is correspondingly arranged on the inner circumferential surface of the outer ring of the stator iron core, and the "T"-shaped protrusion and Insertion connections are formed between the "T"-shaped grooves, and the "T"-shaped protrusions are located at positions corresponding to the grooves of the stator core.

The remanufactured permanent magnet motor based on the hybrid stator iron core and the hybrid rotor iron core of the present invention is also characterized in that: the "T"-shaped structure insert connection is formed by the outer ring of the stator iron core and the inner ring of the stator iron core. The distance between the outer circumferential surface of the remanufactured silicon steel section of the outer ring of the stator iron core and the bottom surface of the "T" groove is not less than 20mm; the outer ring of the stator iron core is iron-based amorphous alloy The distance from the outer circumferential surface of the segment to the groove bottom surface of the "T"-shaped groove is not less than 5mm; the distance from the groove bottom surface of the groove part of the first stator core inner ring segment to the outer circumferential surface of the first stator inner ring segment Not less than 20mm; the distance from the groove bottom surface of the groove portion of the second stator core inner ring segment to the outer circumferential surface of the second stator inner ring segment is not less than 5mm.

The remanufactured permanent magnet motor based on the hybrid stator core and the hybrid rotor core of the present invention is also characterized in that: the remanufactured silicon steel lamination segments are obtained by processing in the following manner: the waste silicon steel disassembled from the waste motor is flattened, Pickling or physical treatment to remove the surface coating; stress relief annealing at a temperature of 820°C-980°C, holding time for 4-4.5 hours, protective atmosphere is nitrogen; cooled to room temperature with the furnace, then cut into shape and re-coated Finish with a new coating.

The remanufactured permanent magnet motor based on the hybrid stator core and the hybrid rotor core of the present invention is also characterized in that: the remanufactured silicon steel lamination segments are obtained by processing in the following manner: the waste silicon steel disassembled from the waste motor is flattened, Pickling or physical treatment to remove the surface coating; cold rolling to reduce the thickness to 0.20±0.01mm, then cutting to shape, and finally annealing at a temperature of 900-950 ℃ under atmospheric conditions, and keeping the temperature for 3-5 After 10 minutes, it was cooled to room temperature with the furnace, and then cut into shape and re-applied with a new coating to complete the treatment, and the atmosphere was N ₂ .

The remanufactured permanent magnet motor based on the hybrid stator core and the hybrid rotor core of the present invention is also characterized in that: the remanufactured permanent magnet motor refers to a permanent magnet motor with a power of not less than 25kw and a width of the stator yoke not less than 25mm.

Compared with the prior art, the beneficial effects of the present invention are:

1. In the present invention, the first rotor stack segment, the inner ring segment of the first stator core and the amorphous alloy segment of the outer ring of the hybrid stator core have equal lengths and are in the same axial position, and the second rotor stack segment, The inner ring section of the second stator core and the remanufactured silicon steel section of the outer ring of the hybrid stator core have the same length and are in the same axial position. This structure effectively ensures that the motor is in the axially symmetrical position during operation. Force uniformity and noise reduction; it sets the second rotor stack segment and the second stator core inner ring segment to have the same length and the same axial position, which can effectively suppress the low saturation magnetic density of iron-based amorphous alloys. The case of torque contraction. At the rated rotational speed, the loss of the stator iron core of the remanufactured motor of the present invention is 40%-70% of the waste motor.

2. The present invention optimizes the air gap length distribution for the iron-based amorphous alloy lamination model of the second rotor lamination segment, reduces the harmonic content in the air gap magnetic density, improves the air gap magnetic field waveform, and reduces the iron core. The loss increases the output torque of the motor, improves the stability of the motor operation, and improves the performance of the motor.

3. Simulation analysis shows that the torque of the remanufactured motor of the present invention is increased by 2.6%.

4. The present invention improves the motor torque of the remanufactured motor and effectively improves the performance of the motor by optimizing the design of the iron-based amorphous alloy lamination model of the second rotor lamination segment.

5. The remanufacturing process in the present invention is simple and easy to realize industrialization; while solving the problem of disposal of waste silicon steel sheets, the comprehensive performance of the motor is significantly improved. Remanufacturing of pole and high speed motors.

Description of drawings

Fig. 1 is the concrete implementation-structural schematic diagram of the remanufactured motor of the present invention;

Fig. 2 is the top view of the remanufactured motor model of the present invention;

3 is a structural cross-sectional view of a remanufactured motor of the present invention;

Fig. 4 is a schematic diagram of the redesigned one-eighth model of the rotor lamination of the amorphous alloy rotor segment;

Figure 5 shows the change trend of no-load loss of remanufactured motor and old motor with speed;

Figure 6 shows the torque comparison between the remanufactured motor and the old motor;

Labels in the figure: 1 outer ring of stator iron core, 2 inner ring of stator iron core, 3 mixed rotor iron core, 1-1 is a "T" groove, 2-1 is a "T"-shaped protrusion, 1a is outside the stator iron core Ring remanufactured silicon steel segment, 1b stator core outer ring iron-based amorphous alloy segment, 2a first stator core inner ring segment, 2b second stator core inner ring segment, 3a first rotor stack segment, 3b second Rotor stack fragment.

Detailed ways

Referring to FIG. 1 and FIG. 2 , in the remanufactured permanent magnet motor based on the hybrid stator core and the hybrid rotor core in this embodiment, the stator core is divided into a stator core outer ring 1 and a stator core inner ring 2 , the outer ring 1 of the stator core, the inner ring 2 of the stator core, and the mixed rotor core 3 are all hybrid lamination structures; between the outer ring 1 of the stator core and the inner ring 2 of the stator core, a "T" shape is used. Structural plug-in connection; it means that a "T"-shaped protrusion 2-1 is arranged on the outer circumferential surface of the inner ring 2 of the stator core, and a "T" groove 1 is correspondingly arranged on the inner circumferential surface of the outer ring 1 of the stator core. -1, form an insert connection between the "T"-shaped protrusion 2-1 and the "T"-shaped groove 1-1, and the "T"-shaped protrusion 2-1 is located at the position corresponding to the groove of the stator core In order to ensure the strength of the inner ring of the stator iron core and the outer ring of the stator iron core, the relevant insert connection can also be in the form of a dovetail slot.

Referring to FIG. 3 , in this embodiment, the outer ring 1 of the stator iron core is arranged in sections along the axial direction. In its axial segmented structure, at least one section of the outer ring of the stator iron core is remanufactured silicon steel from the outer ring of the stator iron core. Section 1a, the rest is the iron-based amorphous alloy section 1b of the outer ring of the stator iron core; the inner ring 2 of the stator iron core is arranged in sections along the axial direction, and the axial section structure includes the first inner ring section 2a of the stator iron core and the second stator core inner ring segment 2b, the second stator core inner ring segment 2b and the stator core outer ring remanufactured silicon steel segment 1a have the same length and are in the same axial position, the first stator core The ring segment 2a and the iron-based amorphous alloy segment 1b of the outer ring of the stator core have the same length and are located in the same axial position; this embodiment uses the iron-based amorphous alloy material with excellent performance, which can effectively reduce the motor loss and improve the motor. performance, and make full use of silicon steel sheets in waste motors to avoid waste of resources.

The hybrid rotor core 3 is arranged in sections along the axial direction, and its axial segment structure includes a first rotor stack segment 3a and a second rotor stack segment 3b, and both ends of the hybrid rotor core are set as the first rotor stack segment 3a, the first rotor stack segment 3a and the first stator core inner ring segment 2a have the same length and are at the same axial position, and the second rotor stack segment 3b and the second stator core inner ring segment 2b have the same length and At the same axial position; due to the low saturation magnetic density of the iron-based amorphous alloy material, directly using the iron-based amorphous alloy material in the inner ring of the stator core will cause torque shrinkage and affect the performance of the motor. This embodiment The structure form in can effectively restrain the motor torque shrinkage.

The first rotor stack segment 3a and the first stator core inner ring segment 2a are made of the same material, and both are remanufactured silicon steel sheet stack segments; the second rotor stack segment 3b and the second stator core inner ring segment 2b are made of the same material, All are iron-based amorphous alloy stack segments; due to the brittleness of iron-based amorphous alloy materials, it is avoided to place the second rotor stack segment 3b at the end of the mixed rotor core, which can ensure reliable product structure.

In the specific implementation, the outer ring 1 of the stator iron core and the inner ring 2 of the stator iron core are inserted and connected in the yoke part of the hybrid stator iron core through a "T"-shaped structure, and set:

The distance from the outer circumferential surface of the remanufactured silicon steel section 1a of the outer ring of the stator core to the bottom surface of the "T"-shaped groove is not less than 20mm;

The distance from the outer circumferential surface of the iron-based amorphous alloy section 1b of the outer ring of the stator core to the bottom surface of the "T"-shaped groove is not less than 5mm;

The distance from the groove bottom surface of the groove portion of the first stator core inner ring segment 2a to the outer circumferential surface of the first stator inner ring segment 2a is not less than 20mm;

The distance from the groove bottom surface of the groove portion of the second stator core inner ring segment 2b to the outer circumferential surface of the second stator inner ring segment 2b is not less than 5 mm.

Referring to FIG. 4 , in this embodiment, for the second rotor lamination segment 3b, the iron-based amorphous alloy lamination model is determined according to the following steps:

Step 1. Determine the following related parameters:

The relevant parameters of the waste permanent magnet motor include: the inner diameter of the stator D _i1 , the length of the air gap g, and the maximum outer diameter of the rotor circle (D _i1 -2g);

The relevant parameters of the remanufactured permanent magnet motor include: the minimum air gap length is δ _min , δ _min =g;

For the rotor outer circle M of the waste permanent magnet motor with the center O: Definition: the center of the eccentric circle of the eccentric slot in the pole is O ₁ , the center of the eccentric circle of the eccentric slot between the poles is O ₂ , and O ₁ is on the single magnetic pole symmetry line A1 The upper and O ₂ are on the symmetry line A2 of the adjacent two magnetic poles, the angle between the center line of the eccentric groove in the pole and the eccentric groove between the poles is τ/2; setting: the depth of the eccentric groove in the pole d ₁ , the eccentric groove between the poles The groove depth d ₂ , the eccentric span angle θ _s1 within the pole, the eccentric span angle θ _s2 between the poles, the single magnetic pole symmetry line A1 is the position of θ _s1 =0, and the adjacent magnetic pole symmetry line A2 is the position of θ _s2 =0;

From the formula (1), the eccentricity H ₁ of the eccentric groove in the pole and the eccentric distance H ₂ of the eccentric groove between the poles are obtained respectively

The inner pole eccentric groove radius R _p1 and the interpole eccentric groove radius R _p2 are obtained from formula (2), respectively,

Where: j=1,2;

Step 2. Determine the iron-based amorphous alloy lamination model of the second rotor lamination segment:

Taking O ₁ as the center of the circle and R _p1 as the radius, draw an arc to the sector boundary with an included angle of θ _s1 with the single magnetic pole symmetry line, and then extend radially outward along the rotor outer circle M to the edge of the rotor outer circle M; And, take O ₂ as the center, draw an arc with R _p2 as the radius to the sector boundary where the angle between the symmetry lines of the adjacent two magnetic poles is θ _s2 , and then extend along the radial direction of the rotor outer circle M to the rotor outer circle M , obtain the iron-based amorphous alloy lamination model of the second rotor lamination segment;

By adjusting the values of d ₁ , d ₂ , θ _s1 and θ _s2 , different design models can be obtained. Preferably, the groove depth d ₁ of the eccentric groove in the pole is set to 0.3mm, and the groove depth d ₂ of the eccentric groove between the poles is set to 1mm. The eccentric span angle θ _s1 in the pole is 13.5°, and the eccentric span angle θ _s2 between the poles is 18°. This structure can effectively reduce the harmonic content in the air gap magnetic density, improve the air gap magnetic field waveform, and reduce iron Core loss, increase the output torque of the motor, improve the stability of the motor operation, and improve the performance of the motor. The simulation analysis results show that the torque of the remanufactured motor is increased by 2.6%.

In a specific implementation, the remanufactured silicon steel sheet stack segments can be obtained by processing in the following manner 1 or 2:

method one:

The surface coating is removed by flattening, pickling or physical treatment of the waste silicon steel disassembled from the waste motor; stress relief annealing is carried out at a temperature of 820°C-980°C, the holding time is 4-4.5 hours, and the protective atmosphere is nitrogen; After cooling to room temperature in the furnace, it is cut to shape and re-applied with a new coating to complete the treatment.

Method two:

The scrap silicon steel dismantled from the scrap motor is flattened, pickled or physically treated to remove the surface coating; the thickness is reduced to 0.20±0.01mm by cold rolling, and then cut into shape, and finally, under atmospheric conditions, the Annealing at a temperature of 900-950° C., holding for 3-5 minutes, cooling to room temperature with the furnace, then cutting and forming and re-coating a new coating to complete the treatment, and the atmosphere is N ₂ .

In this embodiment, the remanufactured permanent magnet motor refers to a permanent magnet motor with a power of not less than 25kw and a width of the stator yoke of not less than 25mm; because the loss of iron-based amorphous alloy material is only one-sixth of that of silicon steel, and the high-power The quality of the iron core material of the motor is relatively large, so the effect of its remanufacturing is better and more remarkable.

The motor silicon steel sheet is inevitably damaged in structure during its assembly and use, and these damages will cause the silicon steel sheet to not be directly used in remanufactured motors; in the technical solution of the present invention, the yoke is intact and the tooth structure is damaged. When the yoke is damaged and the teeth are intact, it can be used for the inner ring of the stator core after processing and cutting.

Table 1 shows the comparison of the magnetic properties of the remanufactured silicon steel sheet and the waste silicon steel sheet processed in the first mode of this embodiment:

Table 1:

Table 2 shows the comparison of the magnetic properties of the remanufactured silicon steel sheet and the waste silicon steel sheet after the second method in the present embodiment:

Table 2

Note: Indicates that the data such as loss of old silicon steel in Table 1 and Table 2 are different, because the sample specifications are different, and the test conditions are also different. Among them, the test conditions in Table 1 are P _1/50 , and the test conditions in Table 2 are: P _1.5/50 .

It can be seen from Table 1 and Table 2 that after the remanufacturing process is adopted, the magnetic properties of the waste silicon steel sheet can be improved, and the single-chip loss is reduced by 7.36% and 1.23% respectively. In the second method, the magnetic induction intensity is increased by 3.10%; in this example, the treated remanufactured silicon steel sheet uses a new coating. Compared with the coating that has been used for many years, the new coating has better insulation and greatly Helps to reduce eddy current losses.

The invention adopts the mixed stator iron core and the mixed rotor iron core, and other parts such as the motor end cover adopt the available parts in the waste motor, and make full use of the materials in the waste motor. The hybrid stator core and the hybrid rotor core are set up, and the iron-based amorphous alloy lamination of the second rotor lamination segment is modeled to optimize the design, which increases the motor torque by 2.4% and reduces the iron loss by 40%-70% , the motor efficiency is increased by 1%-2%, and the motor performance is effectively improved. Figure 5 shows the variation trend of the no-load loss of the remanufactured permanent magnet synchronous motor and the waste motor with the rotation speed in the present invention, where E1 is the waste motor. Load loss, E2 is the no-load loss of the remanufactured motor; Figure 6 shows the torque comparison between the remanufactured permanent magnet synchronous motor and the waste motor in the present invention, wherein C1 is the torque of the waste motor, and C2 is the use of mixed stator iron. The torque of the remanufactured motor with core and hybrid rotor core but without redesign of the rotor structure, C3 is the torque of the remanufactured motor.

Claims (6)

1. a remanufactured permanent magnet motor based on a hybrid stator core and a hybrid rotor core, characterized in that: the stator core split is set to the stator core outer ring (1) and the stator core inner ring (2) , the outer ring of the stator iron core (1), the inner ring of the stator iron core (2), and the mixed rotor iron core (3) are all of mixed lamination structure; The core inner ring (2) adopts a "T"-shaped structure for inserting connection; The stator iron core outer ring (1) is arranged in sections along the axial direction, and in its axial segmentation structure, at least one section of the stator iron core outer ring section is a remanufactured silicon steel section (1a) of the stator iron core outer ring, and the rest Part of it is the iron-based amorphous alloy segment (1b) of the outer ring of the stator core; The stator core inner ring (2) is arranged in sections along the axial direction, and its axial segment structure includes a first stator core inner ring segment (2a) and a second stator core inner ring segment (2b), so The second stator core inner ring segment (2b) and the remanufactured silicon steel segment (1a) of the stator core outer ring have the same length and are at the same axial position, and the first stator core inner ring segment (2a) has the same length as the iron-based amorphous alloy segment (1b) of the outer ring of the stator core and is at the same axial position; The hybrid rotor core (3) is arranged in sections along the axial direction, and its axial segment structure includes a first rotor stack segment (3a) and a second rotor stack segment (3b). Both ends are set as first rotor lamination segments (3a), and the first rotor lamination segments (3a) and the first stator core inner ring segment (2a) have the same length and are in the same axial position; The second rotor stack segment (3b) and the second stator core inner ring segment (2b) have the same length and are at the same axial position; The first rotor stack segment (3a) and the first stator core inner ring segment (2a) are of the same material, and both are remanufactured silicon steel sheet stack segments; the second rotor stack segment (3b) and the second stator The inner ring segment (2b) of the iron core is made of the same material and is a laminated segment of iron-based amorphous alloy; For the second rotor lamination segment (3b), determine its iron-based amorphous alloy lamination model according to the following steps: Step 1. Determine the following related parameters: The relevant parameters of the waste permanent magnet motor include: the inner diameter of the stator D _i1 , the length of the air gap g, and the maximum outer diameter of the rotor circle (D _i1 -2g); The relevant parameters of the remanufactured permanent magnet motor include: the minimum air gap length is δ _min , δ _min =g; For the rotor outer circle M of the waste permanent magnet motor with the center O: Definition: the center of the eccentric circle of the eccentric slot in the pole is O ₁ , the center of the eccentric circle of the eccentric slot between the poles is O ₂ , and O ₁ is on the single magnetic pole symmetry line A1 The upper and O ₂ are on the symmetry line A2 of the adjacent two magnetic poles, the angle between the center line of the eccentric groove in the pole and the eccentric groove between the poles is τ/2; setting: the depth of the eccentric groove in the pole d ₁ , the eccentric groove between the poles The groove depth d ₂ , the eccentric span angle θ _s1 within the pole, the eccentric span angle θ _s2 between the poles, the single magnetic pole symmetry line A1 is the position of θ _s1 =0, and the adjacent magnetic pole symmetry line A2 is the position of θ _s2 =0; From formula (1), the eccentricity H ₁ of the eccentric groove in the pole and the eccentricity H ₂ of the eccentric groove between the poles are obtained respectively,

The inner pole eccentric groove radius R _p1 and the interpole eccentric groove radius R _p2 are obtained from formula (2), respectively,

Where: j=1,2; Step 2. Determine the iron-based amorphous alloy lamination model of the second rotor lamination segment: Taking O ₁ as the center of the circle and R _p1 as the radius, draw an arc to the sector boundary with an included angle of θ _s1 with the single magnetic pole symmetry line, and then extend radially outward along the rotor outer circle M to the edge of the rotor outer circle M; And, take O ₂ as the center, draw an arc with R _p2 as the radius to the sector boundary where the angle between the symmetry lines of the adjacent two magnetic poles is θ _s2 , and then extend along the radial direction of the rotor outer circle M to the rotor outer circle M , obtain the iron-based amorphous alloy lamination model of the second rotor lamination segment. 2. The remanufactured permanent magnet motor based on the hybrid stator iron core and the hybrid rotor iron core according to claim 1, characterized in that: between the stator iron core outer ring (1) and the stator iron core inner ring (2) The use of "T"-shaped structure for inserting connection is to set "T"-shaped protrusions on the outer circumferential surface of the inner ring (2) of the specified sub-iron core, and on the inner circumferential surface of the outer ring (1) of the stator iron core Correspondingly set "T"-shaped grooves to form an insert connection between the "T"-shaped protrusions and the "T"-shaped grooves, and the "T"-shaped protrusions are located at the corresponding grooves of the stator core. location. 3. The remanufactured permanent magnet motor based on the hybrid stator core and the hybrid rotor core according to claim 1, characterized in that: the "T"-shaped structure insert connection is located at the outer ring of the stator core. (1) at the position of the yoke of the hybrid stator core formed by the inner ring of the stator core (2); The distance from the outer circumferential surface of the remanufactured silicon steel section (1a) of the outer ring of the stator core to the bottom surface of the "T"-shaped groove is not less than 20mm; The distance from the outer circumferential surface of the iron-based amorphous alloy section (1b) of the outer ring of the stator core to the bottom surface of the "T"-shaped groove is not less than 5mm; The distance from the groove bottom surface of the groove portion of the first stator core inner ring segment (2a) to the outer circumferential surface of the first stator inner ring segment (2a) is not less than 20mm; The distance from the groove bottom surface of the groove portion of the second stator core inner ring segment (2b) to the outer circumferential surface of the second stator inner ring segment (2b) is not less than 5 mm. 4 . The remanufactured permanent magnet motor based on the hybrid stator core and the hybrid rotor core according to claim 1 , wherein the remanufactured silicon steel lamination segments are obtained by processing in the following manner: they are disassembled from the waste motor. 5 . The scrap silicon steel is flattened, pickled or physically treated to remove the surface coating; stress relief annealing is performed at a temperature of 820°C-980°C, the holding time is 4-4.5 hours, and the protective atmosphere is nitrogen; cooled to room temperature with the furnace, It is then cut to shape and re-applied with a new coating to complete the treatment. 5 . The remanufactured permanent magnet motor based on the hybrid stator core and the hybrid rotor core according to claim 1 , wherein the remanufactured silicon steel lamination segments are obtained by processing in the following manner: they are disassembled from the waste motor. 6 . The scrap silicon steel is flattened, pickled or physically treated to remove the surface coating; the thickness is reduced to 0.20±0.01mm by cold rolling, and then cut into shape, and finally, under atmospheric conditions, at a temperature of 900-950 ° C Annealing is carried out, and after holding for 3-5 minutes, it is cooled to room temperature with the furnace, and then it is cut into shape and re-applied with a new coating to complete the treatment, and the atmosphere is N ₂ . 6. The remanufactured permanent magnet motor based on the hybrid stator core and the hybrid rotor core according to claim 1, wherein the remanufactured permanent magnet motor means that the power is not less than 25kw, and the width of the stator yoke is not less than 25 kw. Permanent magnet motors smaller than 25mm.

Images