WO2019085499A1 - Noyau de rotor - Google Patents

Noyau de rotor Download PDF

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Publication number
WO2019085499A1
WO2019085499A1 PCT/CN2018/091611 CN2018091611W WO2019085499A1 WO 2019085499 A1 WO2019085499 A1 WO 2019085499A1 CN 2018091611 W CN2018091611 W CN 2018091611W WO 2019085499 A1 WO2019085499 A1 WO 2019085499A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnet
rotor
groove
closed
open
Prior art date
Application number
PCT/CN2018/091611
Other languages
English (en)
Chinese (zh)
Inventor
倪祖根
Original Assignee
莱克电气股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 莱克电气股份有限公司 filed Critical 莱克电气股份有限公司
Publication of WO2019085499A1 publication Critical patent/WO2019085499A1/fr

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Classifications

    • 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
    • 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
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/02—Details
    • H02K21/021—Means for mechanical adjustment of the excitation flux
    • 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

Definitions

  • the invention relates to the field of electric machines, and in particular to a rotor core.
  • a motor is an electromagnetic device that realizes electric energy conversion or transmission according to the law of electromagnetic induction. Its main function is to generate driving torque as a power source for electric appliances or various machines.
  • Motors can be divided into DC motors, asynchronous motors, and synchronous motors according to their structure and working principle. Synchronous motors usually include permanent magnet synchronous motors, reluctance synchronous motors, and magnetic tape synchronous motors.
  • the permanent magnet slots of the embedded permanent magnets on the existing market have two structures on the radial outer side, one is open type, the other is fully enclosed and closed type, and the advantages and disadvantages of the open rotor and the closed rotor are It is obvious that under the same conditions, the open rotor has good performance, the maximum output is high, and the maximum output is 30% higher than that of the closed rotor.
  • the open core structure has low strength, and the iron core may be deformed during transportation or handling.
  • the original unbalance of the rotor is large, and the open rotor has poor stability at high speed.
  • the noise of the closed rotor is 3 ⁇ 5Db when the motor of its structure type is running at high speed; and the closed rotor has good stability and noise.
  • its output capability is not as good as that of an open rotor.
  • an object of the present invention is to provide a rotor core which can further enhance the structural stability of the rotor while improving the output capability of the rotor, taking into account the open rotor and the closed type.
  • the advantages of the rotor, while at the same time circumventing their respective deficiencies, have a wider application prospect.
  • a rotor core comprising:
  • At least one set of open rotor punch sets At least one set of open rotor punch sets
  • the closed rotor punching set and the open rotor punching set are alternately stacked in the axial direction.
  • the rotor core holds a closed rotor chip set between a plurality of open rotor chip sets.
  • the closed rotor chip set comprises a plurality of closed rotor blades stacked in sequence in the axial direction, each of the closed rotor blades comprising:
  • the first through hole is disposed at a rotation center of the closed punch body, and the plurality of first permanent magnet grooves are radially arranged in a circumferential direction of the closed punch body, and the adjacent two first permanent magnet slots are defined to be located a first magnetic pole between the two, a first inner magnetic bridge is formed between the inner end of the first permanent magnet slot and the first through hole, and the outer end of the first permanent magnet slot and the outer periphery of the closed punch body An outer magnetic bridge is formed therebetween, and a plurality of closed rotor punches are combined with each other to form a rigid whole.
  • the open rotor punching set comprises a plurality of open rotor punching sheets which are sequentially stacked in the axial direction, and each of the open rotor punching sheets comprises:
  • the second through hole is disposed at a rotation center of the open punch body, and the plurality of second permanent magnet grooves are radially arranged in a circumferential direction of the open punch body, and the adjacent two second permanent magnet slots are defined to be located a second magnetic pole between the two, a second inner magnetic bridge is formed between the inner end of the second permanent magnet slot and the second through hole, and the outer end of the second permanent magnet slot is connected to the magnetic isolation path to the outside
  • a plurality of open rotor blades are combined to form a rigid unit.
  • the plurality of sets of the closed rotor punching set and the plurality of sets of open rotor punching sets are alternately axially combined into a rigid unit such that the first through hole and the second through hole communicate with each other to form a rotating shaft.
  • the rotating shaft through hole, and the first permanent magnet slot and the second permanent magnet slot communicate with each other to form a permanent magnet mounting groove for mounting the permanent magnet.
  • At least one first shoulder portion is formed on a circumferential end surface of the first permanent magnet groove; and at least one second shoulder portion is formed on a circumferential end surface of the second permanent magnet groove.
  • the first shoulder is convex at a right angle along the inner side of the first permanent magnet slot such that the outer end of the first permanent magnet slot is formed with a first outer magnetic flux slot; the second shoulder is along the second permanent magnet slot The inner protrusion is at a right angle such that the outer end of the second permanent magnet slot is formed with a second outer magnetic flux.
  • the first shoulder portion (1121) is provided with two symmetrical formations on the circumferential end faces of the first permanent magnet slots (112); the second shoulder portion (1221) is provided with two symmetrical portions.
  • the ground is formed on the circumferential end faces on both sides of the second permanent magnet slot (122).
  • the inner end of the first permanent magnet groove is formed with a first inner magnetic separation groove
  • the inner end of the second permanent magnet groove is formed with a second inner magnetic separation groove
  • the width of the first inner magnetic separation groove in the circumferential direction is larger than the circumferential width of the first permanent magnetic groove
  • the width of the second inner magnetic separation groove in the circumferential direction is larger than the circumferential direction of the second permanent magnetic groove. Width size.
  • the radially inner end surface of the first inner magnetic separation groove is formed with an inner top end which is convex outward in the radial direction.
  • the radially inner end surface of the second inner magnetic separation groove is formed with a groove recessed in the radial inner side.
  • the invention has the beneficial effects of improving the rotor output capacity and further enhancing the structural stability of the rotor, taking into consideration the advantages of the open rotor and the closed rotor, and avoiding both of them.
  • Their respective shortcomings have broad application prospects.
  • Figure 1 is a perspective view of a rotor core according to the present invention.
  • Figure 2 is a plan view of a closed rotor punch in a rotor core according to the present invention
  • FIG 3 is a top plan view of an open rotor die in a rotor core in accordance with the present invention.
  • the rotor core 1 comprises:
  • At least one set of open rotor punch sets At least one set of open rotor punch sets
  • the closed rotor punching set and the open rotor punching set are alternately stacked in the axial direction.
  • the rotor core 1 holds a closed rotor chip set between a plurality of open rotor chip sets.
  • the closed rotor chip set includes a plurality of closed rotor blades 11 which are sequentially stacked in the axial direction, and each of the closed rotor blades 11 includes:
  • the first through hole 111 is disposed at a rotation center of the closed punch body 118, and the plurality of first permanent magnet grooves 112 are radially arranged in a circumferential direction of the closed punch body 118, and the adjacent two first permanent magnets
  • the slot 112 defines a first magnetic pole 114 between the two, and a first inner magnetic bridge 113 is formed between the inner end of the first permanent magnet slot 112 and the first through hole 111, and the first permanent magnet slot 112 is outside.
  • the outer end is formed with an outer magnetic bridge 115, and a plurality of closed rotor blades 11 are combined with each other to form a rigid unit.
  • the open rotor chip set includes a plurality of open rotor blades 12 which are sequentially stacked in the axial direction, and each of the open rotor blades 12 includes:
  • the second through hole 121 is disposed at a rotation center of the open punch body 128, and the plurality of second permanent magnet grooves 122 are radially arranged in a circumferential direction of the open punch body 128, and adjacent two second permanent magnets
  • the slot 122 defines a second magnetic pole 124 between the two ends.
  • the second inner permanent magnet bridge 123 is formed between the inner end of the second permanent magnet slot 122 and the second through hole 121. The end is connected with a magnetic isolation passage 125 to the outside, and a plurality of open rotor blades 11 are combined with each other to form a rigid whole.
  • first permanent magnet slot 112 and the second permanent magnet slot 122 are respectively uniformly disposed in the circumferential direction, and the first magnetic pole 114 and the second magnetic pole 124 are uniformly disposed in the circumferential direction.
  • the first inner magnetic bridge 113 and the second inner magnetic bridge 123 restrict the permanent magnet from pulsing radially inward, and the outer magnetic bridge 115 can prevent the rotor core from pulsing radially outward during the pivoting process, thereby ensuring
  • the rotational stability of the rotor core also reduces the rotational noise, and the magnetic isolation path 125 acts as a magnetic flux barrier between the permanent magnet and the outside, which prevents the magnetic flux from leaking, thereby increasing the maximum output power.
  • rotor blanks are typically made of silicon steel sheets or silicon steel sheets.
  • a plurality of sets of the closed rotor punching set and a plurality of sets of open rotor punching sets are alternately combined in the axial direction to form a rigid whole, such that the first through hole 111 and the second through hole 121 are formed.
  • the mutually communicating shafts form a shaft through hole for mounting the rotating shaft, and the first permanent magnet slot 112 and the second permanent magnet slot 122 communicate with each other to form a permanent magnet mounting groove for mounting the permanent magnet.
  • the permanent magnet grooves are arranged in a rectangular structure extending in the radial direction, and accordingly, the permanent magnets are also arranged in a rectangular structure adapted thereto.
  • the first permanent magnet slot 112 and the second permanent magnet slot 122 are disposed in a trapezoidal structure, and the sizes of the two are uniform. Accordingly, the permanent magnet is also disposed in a trapezoidal structure corresponding thereto, and further The ratio of the circumferential width of the inner end of the first permanent magnet groove 112 to the circumferential width of the outer end of the first permanent magnet groove 112 is 1:0.85.
  • the width dimension of the first permanent magnet slot 112 in the circumferential direction and the width dimension of the second permanent magnet slot 122 in the circumferential direction gradually decrease as the radius expands.
  • the trapezoidal structure enables the permanent magnet to be gradually tightened by the circumferential end surface of the permanent magnet slot under the centrifugal force in the permanent magnet slot, thereby preventing the inner and outer radial sway of the permanent magnet, further ensuring the rotor core. Rotational stability.
  • At least one first shoulder portion 1121 is formed on the circumferential end surface of the first permanent magnet slot 112, and a circumferential end surface of the second permanent magnet slot (122) is formed on the circumferential end surface. At least one second shoulder 1221.
  • the first shoulder portion 1121 and the second shoulder portion 1221 are each provided with two.
  • first shoulder portion 1121 is raised at a right angle along the inner side of the first permanent magnet slot 112 such that the outer end of the first permanent magnet slot 112 is formed with a first outer magnetic isolation groove 116, and the second shoulder portion 1221 is along the first
  • the inner protrusion of the two permanent magnet slots 122 is at a right angle such that the outer end of the second permanent magnet slot 122 is formed with a second outer magnetic isolation groove 126.
  • the first outer magnetic isolation groove 116 and the second outer magnetic separation groove 126 serve as an outer magnetic flux barrier, which can further prevent leakage of the magnetic flux on the radially outer end, thereby improving energy conversion efficiency.
  • the outer magnetic isolation groove 116 is injection molded with a non-magnetically permeable injection molded body for reinforcing the magnet in the permanent magnet groove 112.
  • the inner end of the first permanent magnet groove 112 is formed with a first inner magnetic isolation groove 117
  • the inner end of the second permanent magnet groove 122 is formed with a second inner magnetic separation groove 127.
  • a width dimension of the first inner magnetic isolation groove 117 in the circumferential direction is larger than a width dimension of the first permanent magnet groove 112 in the circumferential direction
  • a width dimension of the second inner magnetic isolation groove 127 in the circumferential direction is larger than the second permanent magnet groove 122. The width dimension along the circumference.
  • the first inner magnetic isolation groove 117 and the second inner magnetic separation magnetic groove 127 serve as internal magnetic flux barriers, which can further prevent leakage of magnetic flux at the radially inner end, thereby improving energy conversion efficiency, and at the same time, due to the permanent magnet slot at the inner end
  • the distance between the two adjacent magnets is small, which easily causes the magnetic flux generated by two adjacent permanent magnets to affect each other in the vicinity of the inner end. Therefore, the width dimension of the inner magnetic flux groove in the circumferential direction is larger than the width dimension of the permanent magnet groove along the circumferential direction. This effect prevents the magnetic flux from interfering with each other and has a weakening effect, thereby increasing the output power of the rotor core.
  • the first inner magnetic isolation groove 117 and the second inner magnetic separation groove 127 are injection molded with a non-magnetically permeable injection molded body for reinforcing the magnet in the permanent magnet groove 112.
  • the radially inner end surface of the first inner magnetic isolation groove 117 is formed with an inner top end end 1171 which is convex outward in the radial direction, and a radial end surface of the second inner magnetic separation groove 127 is formed with a radial path.
  • a groove 1271 that is recessed toward the inside.
  • the inner top end 1171 enables the permanent magnet to be sufficiently supported at the inner end of the permanent magnet slot 112.
  • the groove 1271 can enlarge the volume of the second inner magnetic isolation groove 127, thereby improving the magnetic isolation capability and further preventing magnetic flux leakage.
  • the permanent magnet can be restrained by the radial limitation of the first shoulder portion 1121, the second shoulder portion 1221 and the inner top end portion 1171, thereby greatly improving the stability of the permanent magnet in the permanent magnet slot when the rotor rotates. Further, by providing the outer barrier bridge 115, the overall stability of the magnetic pole is improved, and at the same time, the magnetic isolation capability at the radially outer end of the permanent magnet is increased by opening the magnetic isolation passage 125, thereby increasing the maximum output power of the rotor.
  • the number of sets of closed rotor punch sets is a
  • the number of open rotor punch sets is b
  • the number of closed rotors in each set of closed rotor sets is x
  • each set of open rotor punches The number of open rotors in the set is y, then a ⁇ 1, b ⁇ 1, x ⁇ 1, y ⁇ 1.
  • the closed rotor chip is assembled above the open rotor chip set, and the magnetic isolation path 125 on the single open rotor plate forms the rotor core. 8 magnetic flux leakage holes 13 on the outer end surface. As shown in FIG.
  • the rotor core 1 is arranged in order from top to bottom in the following structure: the first group of open rotors Punching set - first set of closed rotor punching sets - second set of open rotor punching sets - third set of open rotor punching sets - second set of closed rotor blanking sets - fourth set of open rotors Punching set - Group 5 open rotor punching set - Group 3 closed rotor punching set - Group 6 open rotor punching set - Group 7 open rotor punching set - Group 4 closed rotor Punching set - Group 8 open rotor punching set - Group 9 open rotor punching set - Group 5 closed rotor punching set - Group 10 open rotor punching set - Eleventh open type Rotor Punch Set - Group 6 Closed Rotor Punch Set - Twelfth Group Open Rotor Punch Set - Thirteen Group

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne un noyau de rotor (1), comprenant au moins un groupe de feuilles de rotor fermé et au moins un groupe de feuilles de rotor ouvert. Le groupe de feuilles de rotor fermé et le groupe de feuilles de rotor ouvert sont empilés alternativement dans la direction axiale. Le noyau de rotor (1) peut améliorer la performance de sortie d'un rotor, et peut en outre renforcer la stabilité structurelle du rotor ; les avantages d'un rotor ouvert et d'un rotor fermé sont combinés, et leurs défauts respectifs sont évités ; le noyau de rotor (1) peut être utilisé largement.
PCT/CN2018/091611 2017-11-01 2018-06-15 Noyau de rotor WO2019085499A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201711060148.4A CN107733111A (zh) 2017-11-01 2017-11-01 一种转子铁芯
CN201711060148.4 2017-11-01

Publications (1)

Publication Number Publication Date
WO2019085499A1 true WO2019085499A1 (fr) 2019-05-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/091611 WO2019085499A1 (fr) 2017-11-01 2018-06-15 Noyau de rotor

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CN (2) CN107733111A (fr)
WO (1) WO2019085499A1 (fr)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN112600371A (zh) * 2020-12-18 2021-04-02 山东理工大学 锁紧环式模块化双励磁驱动电机转子生产方法
CN112821615A (zh) * 2021-02-24 2021-05-18 上海电机学院 一种用于切向充磁的永磁同步电机弱磁扩速的转子结构
CN113964979A (zh) * 2020-07-16 2022-01-21 安徽威灵汽车部件有限公司 转子组件、电机、电动助力转向装置和车辆

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Publication number Priority date Publication date Assignee Title
CN107733111A (zh) * 2017-11-01 2018-02-23 莱克电气股份有限公司 一种转子铁芯
JP7195752B2 (ja) * 2018-03-30 2022-12-26 株式会社マキタ 電動工具
CN108808922B (zh) * 2018-05-31 2020-06-30 广东威灵电机制造有限公司 转子铁芯和电机
CN108923560A (zh) * 2018-05-31 2018-11-30 广东威灵电机制造有限公司 一种内置式永磁电机
CN109067035A (zh) * 2018-07-27 2018-12-21 迈科国际控股（香港）有限公司 电机磁芯、电机转子及无刷电机
CN110971029B (zh) * 2018-09-28 2022-03-01 佛山市威灵洗涤电机制造有限公司 转子冲片、转子和电机
EP3657642B1 (fr) * 2018-11-26 2023-09-06 LG Electronics Inc. Moteur

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JP2001157396A (ja) * 1999-11-29 2001-06-08 Mitsubishi Electric Corp 回転電機の回転子及び回転子コアの製造方法
CN203368167U (zh) * 2013-06-26 2013-12-25 上海日立电器有限公司 压缩机电机转子的冲片结构
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CN204376558U (zh) * 2015-02-12 2015-06-03 珠海格力节能环保制冷技术研究中心有限公司 转子铁芯及具有其的电机
CN105529851A (zh) * 2016-02-04 2016-04-27 常州雷利电机科技有限公司 转子冲片、电机转子及应用该电机转子的电机
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113964979A (zh) * 2020-07-16 2022-01-21 安徽威灵汽车部件有限公司 转子组件、电机、电动助力转向装置和车辆
CN112600371A (zh) * 2020-12-18 2021-04-02 山东理工大学 锁紧环式模块化双励磁驱动电机转子生产方法
CN112600371B (zh) * 2020-12-18 2022-06-21 山东理工大学 锁紧环式模块化双励磁驱动电机转子生产方法
CN112821615A (zh) * 2021-02-24 2021-05-18 上海电机学院 一种用于切向充磁的永磁同步电机弱磁扩速的转子结构

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CN113691041A (zh) 2021-11-23

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