CN108539880B - Remanufactured permanent magnet motor based on mixed stator core and mixed rotor core - Google Patents
Remanufactured permanent magnet motor based on mixed stator core and mixed rotor core Download PDFInfo
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- CN108539880B CN108539880B CN201810408905.0A CN201810408905A CN108539880B CN 108539880 B CN108539880 B CN 108539880B CN 201810408905 A CN201810408905 A CN 201810408905A CN 108539880 B CN108539880 B CN 108539880B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention discloses a remanufactured permanent magnet motor based on a mixed stator core and a mixed rotor core, wherein the mixed stator core is divided into a stator core outer ring and a stator core inner ring which are connected in an inserting way in a T-shaped structure; the stator core outer ring, the stator core inner ring and the mixed rotor core are all arranged along the axial direction in a segmented mode, wherein the lengths of the first rotor lamination segment, the first stator core inner ring segment and the stator core outer ring iron-based amorphous alloy segment are equal and are located at the same axial position, the lengths of the second rotor lamination segment, the second stator core inner ring segment and the stator core outer ring remanufactured silicon steel segment are equal and are located at the same axial position, and the first rotor lamination segment and the first stator core inner ring segment are remanufactured silicon steel sheet lamination segments; the second rotor lamination segment and the second stator iron core inner ring segment are iron-based amorphous alloy lamination segments. The invention makes full use of the silicon steel sheet detached from the waste motor and effectively improves the remanufacturing performance of the motor.
Description
Technical Field
The invention relates to the field of motor equipment, in particular to a radial coupling hybrid stator core and a hybrid rotor core and application thereof in high-power remanufacturing of a permanent magnet synchronous motor, and belongs to the field of motor remanufacturing.
Background
The global economy has not been developed continuously at a high speed since the 60 s in the 20 th century, but environmental pollution is ignored, and the effects of global warming, ozone layer destruction, acid rain and the like are brought. Some consumer products cause a sharp rise in the number of waste products due to the problems of short life cycle, low quality and the like, and the importance of environmental problems is recognized in all countries, and environmental management methods and measures are proposed successively, but the traditional environmental management method is terminal management and cannot fundamentally solve the problem of environmental pollution. To completely solve the environmental problem, the process must be done from the source. Particularly, in the manufacturing industry, the influence of the whole life cycle of the product on the environment is considered, raw materials and energy are utilized to the maximum extent, the discharge amount of harmful substances such as solid, liquid and gas is reduced, and the pollution to the environment is reduced.
Since the 21 st century, the new energy automobile, as a vehicle with low pollution and high environmental protection, highly meets the strategic requirements of national green development by being trapped in the problems of energy crisis, environmental deterioration and the like. However, with the vigorous popularization of new energy automobiles and the development and time lapse of new energy automobiles, the recovery pressure of the power motor is increased, how to recycle the scrapped power motor is needed, and the problem to be solved urgently in the development of new energy automobiles is solved.
Chinese patent CN105119396A (published japanese 2015.12.02) discloses a remanufacturing method of a new energy automobile motor, wherein a mixed laminated stator core is formed by laminating silicon steel laminations of a waste motor and an iron-based amorphous alloy in an axial direction and is applied to remanufacturing of the motor. The remanufactured motor assembled by the mixed laminated stator iron core has different magnetization efficiency of each material when running under the same magnetic field, and the stability and the safety of the motor motion can be influenced because the magnetic force applied to each section along the axial direction is inevitably uneven; secondly, because the saturation magnetic density of the amorphous alloy is small, the iron-based amorphous alloy is independently arranged on the stator along the axial direction, and although the loss of the motor is reduced, the output torque of the remanufactured motor is greatly contracted.
Japanese patent 2007 & 267493 discloses a laminated iron core and a method for manufacturing the same, but the method of laminating different materials such as low-carbon steel sheets is adopted, and the electromagnetic performance of the low-carbon steel sheets is not ideal, so that the performance of the laminated mixed iron core is inevitably weakened, and the performance of the motor is further reduced.
The Fe-based amorphous alloy has excellent soft magnetic performance, higher magnetic conductivity and resistance than silicon steel, smaller coercive force and eddy current effect than silicon steel sheets, and the iron loss of the Fe-based amorphous alloy is only 1/3-1/5 of the silicon steel sheets. Because the saturation magnetic density of the remanufactured motor is lower than that of a silicon steel material, if the iron core is directly replaced by the iron-based amorphous alloy material, the motor loss is reduced, but the torque shrinkage of the remanufactured motor is caused.
In fact, due to the above circumstances, the development stage is mainly still in progress for manufacturing the permanent magnet motor.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a remanufactured permanent magnet motor based on a mixed stator core and a mixed rotor core, which can effectively improve the performance of the remanufactured motor while fully utilizing silicon steel sheets detached from waste motors.
In order to achieve the purpose, the invention adopts the following technical scheme:
the remanufactured permanent magnet motor based on the mixed stator core and the mixed rotor core is characterized in that: the stator core is divided into a stator core outer ring and a stator core inner ring, and the stator core outer ring, the stator core inner ring and the mixed rotor core are all of a mixed laminated structure; the stator core outer ring and the stator core inner ring are connected in an inserting manner by adopting a T-shaped structure;
the stator core outer ring is arranged along the axial direction in a segmented mode, in the axial segmented structure, at least one section of stator core outer ring section is a remanufactured silicon steel section of the stator core outer ring, and the rest part of the stator core outer ring section is a stator core outer ring iron-based amorphous alloy section;
the stator core inner ring is arranged along the axial direction in a segmented mode, the axial segmented structure of the stator core inner ring comprises a first stator core inner ring section and a second stator core inner ring section, the length of the second stator core inner ring section is equal to that of the remanufactured silicon steel section of the stator core outer ring and is located at the same axial position, and the length of the first stator core inner ring section is equal to that of the iron-based amorphous alloy section of the stator core outer ring and is located at the same axial position;
the hybrid rotor core is arranged along an axial section, the axial section structure of the hybrid rotor core comprises a first rotor lamination section and a second rotor lamination section, two ends of the hybrid rotor core are respectively provided with the first rotor lamination section, and the length of the first rotor lamination section is equal to that of the inner ring of the first stator core and the first rotor lamination section is located at the same axial position; the second rotor lamination segment is equal in length to the second stator core inner ring segment and located at the same axial position;
the first rotor lamination section and the first stator core inner ring section are made of the same material and are remanufactured silicon steel sheet lamination sections; the second rotor lamination segment and the second stator core inner ring segment are made of the same material and are iron-based amorphous alloy lamination segments.
The remanufactured permanent magnet motor based on the mixed stator core and the mixed rotor core is also characterized in that: aiming at the second rotor lamination segment, determining an iron-based amorphous alloy lamination model according to the following steps:
the relevant parameters of the waste permanent magnet motor comprise: stator inner diameter Di1Air gap length g, maximum rotor outside diameter (D)i1-2g)；
Remanufactured permanent magnet motors have relevant parameters including: minimum air gap length of deltamin，δmin＝g；
Aiming at the outer circle M of the rotor of the waste permanent magnet motor with the circle center of O: defining: the center of an eccentric circle of the eccentric groove in the pole is O1Center of eccentric circle of the interelectrode eccentric slot is O2，O1On the single pole symmetry line A1, O2On the symmetric line A2 of two adjacent magnetic poles, the included angle between the central lines of the eccentric grooves in the poles and the eccentric grooves between the poles is tau/2; setting: depth d of eccentric groove in pole1Inter-electrode eccentric groove depth d2The pole inner eccentric over the pitch angle thetas1Interpolar eccentric straddle angle thetas2The single pole symmetry line A1 is thetas1The position of 0, the adjacent magnetic pole symmetry line A2 is thetas2Position 0;
respectively obtained by the formula (1)Obtaining the eccentricity H of the eccentric groove in the pole1Eccentricity H of eccentric slot between poles2，
Obtaining the radius R of the eccentric groove in the pole from the formula (2)p1Radius R of eccentric groove between polesp2，
Wherein: j is 1, 2;
with O1As a circle center, with Rp1Drawing an arc for the radius to form an included angle theta with the symmetrical line of the single magnetic poles1The fan-shaped boundary extends to the edge of the excircle M of the rotor along the radial extension of the excircle M of the rotor; and, with O2As a circle center, with Rp2Drawing an arc for the radius to form an included angle theta with the symmetric line of two adjacent magnetic poless2And extending the fan-shaped boundary to the edge of the rotor excircle M along the radial extension of the rotor excircle M to obtain an iron-based amorphous alloy lamination model of the second rotor lamination segment.
The remanufactured permanent magnet motor based on the mixed stator core and the mixed rotor core is also characterized in that: the T-shaped structure is adopted for the embedded connection between the stator core outer ring and the stator core inner ring, namely, the T-shaped bulges are arranged on the outer circumferential surface of the stator core inner ring, the T-shaped grooves are correspondingly arranged on the inner circumferential surface of the stator core outer ring, the embedded connection is formed between the T-shaped bulges and the T-shaped grooves, and the T-shaped bulges are positioned at the positions corresponding to the groove parts of the stator core.
The remanufactured permanent magnet motor based on the mixed stator core and the mixed rotor core is also characterized in that: the T-shaped structure is inserted and connected at the yoke part of the mixed stator core formed by the stator core outer ring and the stator core inner ring; the distance from the outer circumferential surface of the remanufactured silicon steel section of the outer ring of the stator core to the groove bottom surface of the T-shaped groove is not less than 20 mm; the distance from the outer circumferential surface of the iron-based amorphous alloy section on the outer ring of the stator iron core to the groove bottom surface of the T-shaped groove is not less than 5 mm; the distance from the groove bottom surface of the groove part of the inner ring section of the first stator to the outer circumferential surface of the inner ring section of the first stator is not less than 20 mm; the distance from the groove bottom surface of the groove part of the second stator iron core inner ring section to the outer circumferential surface of the second stator inner ring section is not less than 5 mm.
The remanufactured permanent magnet motor based on the mixed stator core and the mixed rotor core is also characterized in that: the remanufactured silicon steel sheet lamination segment is obtained by processing in the following way: flattening, pickling or physically treating the waste silicon steel detached from the waste motor to remove the surface coating; performing stress relief annealing at 820-980 ℃ for 4-4.5 hours in a protective atmosphere of nitrogen; cooling to room temperature along with the furnace, cutting, forming and coating a new coating again to finish the treatment.
The remanufactured permanent magnet motor based on the mixed stator core and the mixed rotor core is also characterized in that: the remanufactured silicon steel sheet lamination segment is obtained by processing in the following way: flattening, pickling or physically treating the waste silicon steel detached from the waste motor to remove the surface coating; cold rolling to reduce the thickness to 0.20 +/-0.01 mm, cutting for shaping, annealing at 900-950 deg.C in atmosphere, holding for 3-5 min, cooling to room temperature, cutting for shaping, and recoating to finish the treatment, wherein the atmosphere is N2。
The remanufactured permanent magnet motor based on the mixed stator core and the mixed rotor core is also characterized in that: the remanufactured permanent magnet motor is a permanent magnet motor with the power not less than 25kw and the width of the stator yoke not less than 25 mm.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the lengths of the amorphous alloy sections of the first rotor lamination section, the first stator core inner ring section and the mixed stator core outer ring are equal and are positioned at the same axial position, and the lengths of the remanufactured silicon steel sections of the second rotor lamination section, the second stator core inner ring section and the mixed stator core outer ring are equal and are positioned at the same axial position, so that the structural form effectively ensures the stress uniformity of the motor at the axial symmetric position in the operation process and reduces the noise; the second rotor lamination segment and the second stator iron core inner ring segment are arranged to be equal in length and located at the same axial position, and the condition that the torque shrinks due to the fact that the saturation magnetic density of the iron-based amorphous alloy is small can be effectively restrained. At rated rotation speed, the stator core loss of the remanufactured motor is 40-70% of that of the waste motor.
2. The invention optimizes the air gap length distribution aiming at the iron-based amorphous alloy lamination model of the second rotor lamination segment, reduces the harmonic content in the air gap flux density, improves the air gap magnetic field waveform, reduces the iron core loss, increases the output torque of the motor, improves the running stability of the motor and improves the performance of the motor.
3. Simulation analysis shows that the torque of the remanufactured motor is improved by 2.6 percent.
4. According to the invention, the motor torque of the remanufactured motor is improved and the motor performance is effectively improved by optimally designing the iron-based amorphous alloy lamination model of the second rotor lamination segment.
5. The remanufacturing process flow is simple and easy to realize industrially; the comprehensive performance of the motor is obviously improved while the problem of processing waste silicon steel sheets is solved, and the related technical scheme is suitable for high-power permanent magnet synchronous motors in various fields and is also suitable for remanufacturing multipolar and high-rotating-speed motors.
Drawings
FIG. 1 is a schematic structural view of a remanufactured motor embodying the present invention;
FIG. 2 is a top view of a remanufactured motor model of the present invention;
FIG. 3 is a structural cross-sectional view of a remanufactured motor of the present invention;
FIG. 4 is a schematic view of an eighth of a model for redesigning rotor laminations of an amorphous alloy rotor section;
FIG. 5 shows the trend of the no-load loss of the remanufactured motor and the old motor along with the change of the rotating speed;
FIG. 6 is a remanufactured motor torque compared to an old motor torque;
reference numbers in the figures: the stator core comprises a stator core outer ring 1, a stator core inner ring 2, a mixed rotor core 3, a T-shaped groove 1-1, a T-shaped protrusion 2-1, a remanufactured silicon steel section on the stator core outer ring 1a, an iron-based amorphous alloy section on the stator core outer ring 1b, a first stator core inner ring section 2a, a second stator core inner ring section 2b, a first rotor overlapping segment 3a and a second rotor overlapping segment 3 b.
Detailed Description
Referring to fig. 1 and 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, and the stator core outer ring 1, the stator core inner ring 2, and the hybrid rotor core 3 are all of a hybrid laminated structure; the stator iron core outer ring 1 and the stator iron core inner ring 2 are connected in an inserting way by adopting a T-shaped structure; the T-shaped bulge 2-1 is arranged on the outer circumferential surface of the stator core inner ring 2, the T-shaped groove 1-1 is correspondingly arranged on the inner circumferential surface of the stator core outer ring 1, the T-shaped bulge 2-1 and the T-shaped groove 1-1 are connected in an inserting mode, the T-shaped bulge 2-1 is located at the position corresponding to the groove portion of the stator core, strength of the stator core inner ring and the stator core outer ring is guaranteed, and relevant inserting connection can also adopt a dovetail groove structure form.
Referring to fig. 3, in the present embodiment, the stator core outer ring 1 is axially segmented, and in the axial segmented structure, at least one stator core outer ring segment is a remanufactured silicon steel segment 1a of the stator core outer ring, and the rest is a stator core outer ring iron-based amorphous alloy segment 1 b; the stator core inner ring 2 is arranged along the axial direction in a segmented mode, the axial segmented structure comprises a first stator core inner ring section 2a and a second stator core inner ring section 2b, the second stator core inner ring section 2b is equal to the remanufactured silicon steel section 1a of the stator core outer ring in length and is located at the same axial position, and the first stator core inner ring section 2a is equal to the iron-based amorphous alloy section 1b of the stator core outer ring in length and is located at the same axial position; the embodiment utilizes the iron-based amorphous alloy material with excellent performance, can effectively reduce the loss of the motor and improve the performance of the motor, and fully utilizes silicon steel sheets in the waste motor to avoid resource waste.
The hybrid rotor core 3 is arranged along the axial direction in a segmented mode, the axial segmented structure of the hybrid rotor core comprises a first rotor lamination section 3a and a second rotor lamination section 3b, two ends of the hybrid rotor core are respectively provided with the first rotor lamination section 3a, the first rotor lamination section 3a is equal to the first stator core inner ring section 2a in length and located at the same axial position, and the second rotor lamination section 3b is equal to the second stator core inner ring section 2b in length and located at the same axial position; because the saturation magnetic density of the iron-based amorphous alloy material is low, the iron-based amorphous alloy material is directly used in the inner ring of the stator core, so that the torque shrinkage is caused, and the performance of the motor is influenced.
The first rotor lamination section 3a and the first stator core inner ring section 2a are made of the same material and are remanufactured silicon steel sheet lamination sections; the second rotor lamination section 3b and the second stator core inner ring section 2b are made of the same material and are iron-based amorphous alloy lamination sections; due to the brittleness of the iron-based amorphous alloy material, the second rotor lamination segment 3b is prevented from being arranged at the end part of the iron core of the hybrid rotor, and the structure reliability of a product can be ensured.
In concrete implementation, stator core outer ring 1 and stator core inner ring 2 are inserted and connected through "T" style of calligraphy structure in the yoke portion of mixed stator core to set up:
the distance from the outer circumferential surface of the remanufactured silicon steel section 1a of the outer ring of the stator core to the groove bottom surface of the T-shaped groove is not less than 20 mm;
the distance from the outer circumferential surface of the iron-based amorphous alloy section 1b on the outer ring of the stator iron core to the groove bottom surface of the T-shaped groove is not less than 5 mm;
the distance from the groove bottom surface of the groove part of the first stator core inner coil section 2a to the outer circumferential surface of the first stator inner coil section 2a is not less than 20 mm;
the distance from the groove bottom surface of the groove of the second stator core inner coil section 2b to the outer circumferential surface of the second stator core inner coil section 2b is not less than 5 mm.
Referring to fig. 4, the present embodiment determines the iron-based amorphous alloy lamination model of the second rotor lamination segment 3b according to the following steps:
the relevant parameters of the waste permanent magnet motor comprise: stator inner diameter Di1Air gap length g, maximum rotor outside diameter (D)i1-2g)；
Remanufactured permanent magnet motors have relevant parameters including: minimum air gap length of deltamin，δmin＝g；
Aiming at the outer circle M of the rotor of the waste permanent magnet motor with the circle center of O: defining: the center of an eccentric circle of the eccentric groove in the pole is O1Center of eccentric circle of the interelectrode eccentric slot is O2，O1On the single pole symmetry line A1, O2On the symmetric line A2 of two adjacent magnetic poles, the included angle between the central lines of the eccentric grooves in the poles and the eccentric grooves between the poles is tau/2; setting: depth d of eccentric groove in pole1Inter-electrode eccentric groove depth d2The pole inner eccentric over the pitch angle thetas1Interpolar eccentric straddle angle thetas2The single pole symmetry line A1 is thetas1The position of 0, the adjacent magnetic pole symmetry line A2 is thetas2Position 0;
respectively obtaining the eccentricity H of the eccentric slot in the pole by the formula (1)1Eccentricity H of eccentric slot between poles2
Obtaining the radius R of the eccentric groove in the pole from the formula (2)p1Radius R of eccentric groove between polesp2，
Wherein: j is 1, 2;
with O1As a circle center, with Rp1Drawing an arc for the radius to form an included angle theta with the symmetrical line of the single magnetic poles1The fan-shaped boundary extends to the edge of the excircle M of the rotor along the radial extension of the excircle M of the rotor; and areAnd, with O2As a circle center, with Rp2Drawing an arc for the radius to form an included angle theta with the symmetric line of two adjacent magnetic poless2Extending the outer edge of the rotor excircle M to the edge of the rotor excircle M along the radial extension of the rotor excircle M at the sector boundary to obtain an iron-based amorphous alloy lamination model of a second rotor lamination segment;
by adjusting d1、d2、θs1And thetas2Different design models can be obtained, preferably: setting the depth d of the eccentric groove in the pole10.3mm, interelectrode eccentric groove depth d2Is 1mm, and has an extremely eccentric over-pitch angle thetas1Is 13.5 degrees and the interpolar eccentric span angle thetas2The angle is 18 degrees, the structural form can effectively reduce the harmonic content in the air gap flux density, improve the air gap magnetic field waveform, reduce the iron core loss, increase the output torque of the motor, improve the running stability of the motor and improve the performance of the motor. The simulation analysis result expresses that the torque of the remanufactured motor is improved by 2.6 percent.
In specific implementation, the remanufactured silicon steel sheet lamination segment can be obtained by processing in the following one mode or two modes:
the first method is as follows:
flattening, pickling or physically treating the waste silicon steel detached from the waste motor to remove the surface coating; performing stress relief annealing at 820-980 ℃ for 4-4.5 hours in a protective atmosphere of nitrogen; cooling to room temperature along with the furnace, cutting, forming and coating a new coating again to finish the treatment.
The second method comprises the following steps:
flattening, pickling or physically treating the waste silicon steel detached from the waste motor to remove the surface coating; cold rolling to reduce the thickness to 0.20 +/-0.01 mm, cutting for shaping, annealing at 900-950 deg.C in atmosphere, holding for 3-5 min, cooling to room temperature, cutting for shaping, and recoating to finish the treatment, wherein the atmosphere is N2。
In this embodiment, the remanufactured permanent magnet motor is a permanent magnet motor with power not less than 25kw and width of a stator yoke not less than 25 mm; because the loss of the iron-based amorphous alloy material is only one sixth of that of silicon steel, and the mass of the iron core material of the high-power motor is larger, the remanufacturing effect of the iron core material is better and remarkable.
Structural damage to the silicon steel sheet of the motor inevitably occurs during assembly and use of the silicon steel sheet, and the damage can cause the silicon steel sheet not to be directly used in remanufacturing the motor; according to the technical scheme, when the yoke part is intact and the tooth part structure is damaged, the processed and cut tooth part structure can be used for the outer ring of the stator core, and when the yoke part is damaged and the tooth part structure is intact, the processed and cut tooth part structure can be used for the inner ring of the stator core.
Table 1 shows the comparison of the magnetic properties of the remanufactured silicon steel sheet treated by the first embodiment with those of the waste silicon steel sheet:
table 1:
table 2 shows the magnetic performance comparison between the remanufactured silicon steel sheet and the waste silicon steel sheet after the treatment of the second method in the embodiment:
TABLE 2
Note: table 1 shows that the data of the wear of the old silicon steel is different from that of table 2 because the specifications of the samples are different and the test conditions are different, wherein the test condition in table 1 is P1/50Table 2 the test conditions are: p1.5/50。
As can be seen from tables 1 and 2: after the remanufacturing process is adopted, the magnetic performance of the waste silicon steel sheets can be improved, the single sheet loss is respectively reduced by 7.36 percent and 1.23 percent, the magnetic induction is almost unchanged after the treatment of the first formula, and the magnetic induction intensity is improved by 3.10 percent after the treatment of the second formula; the remanufactured silicon steel sheet treated in the embodiment uses the new coating, and compared with a coating used for years, the new coating has better insulating property and is greatly beneficial to reducing eddy current loss.
According to the invention, the mixed stator iron core and the mixed rotor iron core are adopted, other parts such as the motor end cover and the like adopt available parts in the waste motor, materials in the waste motor are fully utilized, and due to the superiority of the performance of the iron-based amorphous alloy material, the mixed stator iron core and the mixed rotor iron core are reasonably arranged, and the iron-based amorphous alloy lamination of the second rotor lamination segment is subjected to model optimization design, so that the motor torque is increased by 2.4%, the iron loss is reduced by 40% -70%, the motor efficiency is improved by 1% -2%, and the motor performance is effectively improved; fig. 6 shows a torque comparison of a remanufactured permanent magnet synchronous motor of the present invention with a used motor, where C1 is the torque of the used motor, C2 is the torque of the remanufactured motor using a hybrid stator core and a hybrid rotor core without redesigning the rotor structure, and C3 is the torque of the remanufactured motor.
Claims (6)
1. The utility model provides a refabrication permanent-magnet machine based on mix stator core and mixed rotor core, characterized by: the stator core is divided into a stator core outer ring (1) and a stator core inner ring (2), and the stator core outer ring (1), the stator core inner ring (2) and the mixed rotor core (3) are all of a mixed laminated structure; the stator core outer ring (1) and the stator core inner ring (2) are connected in an inserting manner by adopting a T-shaped structure;
the stator core outer ring (1) is arranged along the axial direction in a segmented mode, in the axial segmented structure, at least one section of stator core outer ring section is a remanufactured silicon steel section (1a) of the stator core outer ring, and the rest part of the stator core outer ring section is a stator core outer ring iron-based amorphous alloy section (1 b);
the stator core inner ring (2) is arranged along an axial section, the axial section structure of the stator core inner ring comprises a first stator core inner ring section (2a) and a second stator core inner ring section (2b), the second stator core inner ring section (2b) is equal to the stator core outer ring remanufactured silicon steel section (1a) in length and is located at the same axial position, and the first stator core inner ring section (2a) is equal to the stator core outer ring iron-based amorphous alloy section (1b) in length and is located at the same axial position;
the hybrid rotor core (3) is arranged along an axial section, the axial section structure of the hybrid rotor core comprises a first rotor laminated section (3a) and a second rotor laminated section (3b), two ends of the hybrid rotor core are respectively provided with the first rotor laminated section (3a), and the first rotor laminated section (3a) and the first stator core inner coil section (2a) are equal in length and are located at the same axial position; the second rotor lamination section (3b) is equal in length and at the same axial position as the second stator core inner ring section (2 b);
the first rotor lamination section (3a) and the first stator core inner ring section (2a) are made of the same material and are remanufactured silicon steel sheet lamination sections; the second rotor lamination segment (3b) and the second stator core inner ring segment (2b) are made of the same material and are iron-based amorphous alloy lamination segments;
aiming at the second rotor lamination section (3b), determining an iron-based amorphous alloy lamination model thereof according to the following steps:
step 1, determining the following relevant parameters:
the relevant parameters of the waste permanent magnet motor comprise: stator inner diameter Di1Air gap length g, maximum rotor outside diameter (D)i1-2g)；
Remanufactured permanent magnet motors have relevant parameters including: minimum air gap length of deltamin，δmin＝g；
Aiming at the outer circle M of the rotor of the waste permanent magnet motor with the circle center of O: defining: the center of an eccentric circle of the eccentric groove in the pole is O1Center of eccentric circle of the interelectrode eccentric slot is O2，O1On the single pole symmetry line A1, O2On the symmetric line A2 of two adjacent magnetic poles, the included angle between the central lines of the eccentric grooves in the poles and the eccentric grooves between the poles is tau/2; setting: depth d of eccentric groove in pole1Inter-electrode eccentric groove depth d2The pole inner eccentric over the pitch angle thetas1Interpolar eccentric straddle angle thetas2The single pole symmetry line A1 is thetas1The position of 0, the adjacent magnetic pole symmetry line A2 is thetas2Position 0;
respectively obtaining the eccentricity H of the eccentric slot in the pole by the formula (1)1Eccentricity H of eccentric slot between poles2，
Obtaining the radius R of the eccentric groove in the pole from the formula (2)p1Radius R of eccentric groove between polesp2，
Wherein: j is 1, 2;
step 2, determining an iron-based amorphous alloy lamination model of the second rotor lamination segment:
with O1As a circle center, with Rp1Drawing an arc for the radius to form an included angle theta with the symmetrical line of the single magnetic poles1The fan-shaped boundary extends to the edge of the excircle M of the rotor along the radial extension of the excircle M of the rotor; and, with O2As a circle center, with Rp2Drawing an arc for the radius to form an included angle theta with the symmetric line of two adjacent magnetic poless2And extending the fan-shaped boundary to the edge of the rotor excircle M along the radial extension of the rotor excircle M to obtain an iron-based amorphous alloy lamination model of the second rotor lamination segment.
2. The hybrid stator core and hybrid rotor core-based remanufactured permanent magnet electric machine of claim 1, wherein: the stator core outer ring (1) and the stator core inner ring (2) are connected in an inserting mode through the T-shaped structure, namely T-shaped protrusions are arranged on the outer circumferential surface of the stator core inner ring (2), T-shaped grooves are correspondingly arranged on the inner circumferential surface of the stator core outer ring (1), inserting connection is formed between the T-shaped protrusions and the T-shaped grooves, and the T-shaped protrusions are located at positions corresponding to groove portions of the stator core.
3. The hybrid stator core and hybrid rotor core-based remanufactured permanent magnet electric machine of claim 1, wherein: the T-shaped structure is inserted and connected at the yoke part position of the mixed stator core formed by the stator core outer ring (1) and the stator core inner ring (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 groove bottom surface of the T-shaped groove is not less than 20 mm;
the distance from the outer circumferential surface of the iron-based amorphous alloy section (1b) on the outer ring of the stator iron core to the groove bottom surface of the T-shaped groove is not less than 5 mm;
the distance from the groove bottom surface of the groove part of the first stator core inner coil section (2a) to the outer circumferential surface of the first stator core inner coil section (2a) is not less than 20 mm;
the distance from the groove bottom surface of the groove part of the second stator iron core inner ring section (2b) to the outer circumferential surface of the second stator inner ring section (2b) is not less than 5 mm.
4. The hybrid stator core and hybrid rotor core-based remanufactured permanent magnet electric machine of claim 1, wherein: the remanufactured silicon steel sheet lamination segment is obtained by processing in the following way: flattening, pickling or physically treating the waste silicon steel detached from the waste motor to remove the surface coating; performing stress relief annealing at 820-980 ℃ for 4-4.5 hours in a protective atmosphere of nitrogen; cooling to room temperature along with the furnace, cutting, forming and coating a new coating again to finish the treatment.
5. The hybrid stator core and hybrid rotor core-based remanufactured permanent magnet electric machine of claim 1, wherein: the remanufactured silicon steel sheet lamination segment is obtained by processing in the following way: flattening, pickling or physically treating the waste silicon steel detached from the waste motor to remove the surface coating; cold rolling to reduce the thickness to 0.20 +/-0.01 mm, cutting for shaping, annealing at 900-950 deg.C in atmosphere, holding for 3-5 min, cooling to room temperature, cutting for shaping, and recoating to finish the treatment, wherein the atmosphere is N2。
6. The hybrid stator core and hybrid rotor core-based remanufactured permanent magnet electric machine of claim 1, wherein: the remanufactured permanent magnet motor is a permanent magnet motor with the power not less than 25kw and the width of the stator yoke not less than 25 mm.
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| CN113783319A (en) * | 2021-10-11 | 2021-12-10 | 辽宁工程技术大学 | Novel amorphous alloy asynchronous motor for electric automobile driving system |
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| JP2007267493A (en) * | 2006-03-28 | 2007-10-11 | Mitsui High Tec Inc | Laminated iron core and manufacturing method of laminated iron core |
| CN103066711A (en) * | 2012-12-14 | 2013-04-24 | 苏州德丰电机有限公司 | Permanent magnet motor pole core split structure |
| CN203537095U (en) * | 2013-09-23 | 2014-04-09 | 山东欧瑞安电气有限公司 | Dismountable pole-hanging low-speed large-torque permanent-magnetic rotor structure |
| CN104393713A (en) * | 2014-09-17 | 2015-03-04 | 柏科（常熟）电机有限公司 | Remanufacturing method of automobile starter |
| CN105119396A (en) * | 2015-09-18 | 2015-12-02 | 合肥工业大学 | Mixed laminated stator core and the application thereof to remanufacturing a power motor |
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| JP2007267493A (en) * | 2006-03-28 | 2007-10-11 | Mitsui High Tec Inc | Laminated iron core and manufacturing method of laminated iron core |
| CN103066711A (en) * | 2012-12-14 | 2013-04-24 | 苏州德丰电机有限公司 | Permanent magnet motor pole core split structure |
| CN203537095U (en) * | 2013-09-23 | 2014-04-09 | 山东欧瑞安电气有限公司 | Dismountable pole-hanging low-speed large-torque permanent-magnetic rotor structure |
| CN104393713A (en) * | 2014-09-17 | 2015-03-04 | 柏科（常熟）电机有限公司 | Remanufacturing method of automobile starter |
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