WO2020125206A1 - 一种1级能效隔爆型异步起动三相永磁同步电动机 - Google Patents

一种1级能效隔爆型异步起动三相永磁同步电动机 Download PDF

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Publication number
WO2020125206A1
WO2020125206A1 PCT/CN2019/113823 CN2019113823W WO2020125206A1 WO 2020125206 A1 WO2020125206 A1 WO 2020125206A1 CN 2019113823 W CN2019113823 W CN 2019113823W WO 2020125206 A1 WO2020125206 A1 WO 2020125206A1
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WIPO (PCT)
Prior art keywords
flameproof
permanent magnet
magnetic steel
rotor
starting
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Ceased
Application number
PCT/CN2019/113823
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English (en)
French (fr)
Inventor
肖立民
刘发梅
张新春
李梦林
郝维
高重阳
李静娅
蒙磊
玉佳彬
谢超群
王赫
张东波
王德义
陈凯
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Wolong Electric Drive Group Co Ltd
Wolong Electric Nanyang Explosion Protection Group Co Ltd
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Wolong Electric Group Co Ltd
Wolong Electric Nanyang Explosion Protection Group Co Ltd
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Application filed by Wolong Electric Group Co Ltd, Wolong Electric Nanyang Explosion Protection Group Co Ltd filed Critical Wolong Electric Group Co Ltd
Publication of WO2020125206A1 publication Critical patent/WO2020125206A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • 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
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • 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
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • 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
    • H02K21/46—Motors having additional short-circuited winding for starting as an asynchronous motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/136—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas explosion-proof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium

Definitions

  • the invention relates to a flameproof permanent magnet motor, in particular to a level 1 energy efficiency flameproof asynchronous start three-phase permanent magnet synchronous motor.
  • asynchronous start three-phase permanent magnet synchronous motors not only have the capability of self-starting under three-phase power frequency AC power, but also have the advantages of high efficiency and high power factor in a wide load range, and are more suitable. It is used in occasions where energy-saving requirements are relatively high, such as fans, compressors and oil field pumping units. Therefore, the promotion of energy-saving and high-efficiency flameproof asynchronous starting three-phase permanent magnet synchronous motors in petroleum, chemical, coal and other industries to replace flameproof three-phase asynchronous motors can change the current situation of serious energy waste in China's petroleum, chemical or coal industries. It is a motor industry upgrading activity that benefits the country and the people and has high social benefits. In line with the national "energy-saving and environmental protection" guidance, it has a broad application prospect.
  • the purpose of the present invention is to provide a level 1 energy efficiency flameproof asynchronous start three-phase permanent magnet synchronous motor in order to meet the requirements of level 1 energy efficiency in view of the above-mentioned shortcomings of the prior art.
  • the 1st-level energy-efficient flameproof asynchronous start three-phase permanent magnet synchronous motor includes a flameproof casing, a stator assembly and a rotating shaft installed with a permanent magnet rotor assembly, the stator assembly is fixed In the flameproof enclosure, and the stator assembly includes a stator core and a stator coil, the permanent magnet rotor assembly includes a rotor core, a starter bar, magnetic steel, and a non-magnetic magnetic steel platen;
  • the rotor core is formed by stacking the rotor punches coaxially and fixed on the rotating shaft.
  • the rotor punches are provided with a number of starting cage bar installation slots and a W-shaped magnetic steel slot.
  • the magnetic steel slots are located on the starting cage bar installation slots.
  • the magnetic steel is arranged in the corresponding magnetic steel groove, and the magnetic steel pressure plate is correspondingly arranged at both ends of the rotor core and fixed by the tension screw penetrating through the rotor core;
  • the starting cage bar is correspondingly arranged at the starting Among the cage bar installation grooves, the starting cage bar installation grooves are distributed on the near outer circumferential end surface of the rotor punch in the radial direction, and the groove type of the starting cage bar installation groove is a convex flat bottom groove.
  • the adjacent starting cage bar installation grooves are arranged with unequal tooth width.
  • the W-shaped magnetic steel grooves include a plurality of radial grooves and fold grooves, the radial grooves are distributed along the radial direction, and the fold grooves are distributed between adjacent radial grooves The groove surrounds into a W-shaped groove.
  • a gap in the radial direction between the radial slot and the starting cage installation slot there is a gap in the radial direction between the radial slot and the starting cage installation slot, and it is called a magnetic isolation bridge, and the length of the magnetic isolation bridge is 1.5 to 2.5 mm.
  • a cooling fan and a wind hood are also provided outside the explosion-proof casing, and the angle of the fan blades of the cooling fan is unequal, and the wind hood and the cooling fan are correspondingly arranged.
  • the stator core is made of cold-rolled silicon steel sheet material 50W350, and the stator coil uses a low-harmonic winding structure.
  • the magnetic steel uses permanent magnetic materials.
  • the magnetic steel uses permanent magnet material N35SH.
  • the beneficial effects of the present invention are: 1)
  • the flameproof asynchronous three-phase permanent magnet synchronous motor uses a built-in magnetic circuit structure to distribute the magnetic steel slots in a W-shape, and has a series rotor structure and a parallel rotor structure.
  • the rotor assembly can be installed with more magnetic steel than the series and parallel magnetic circuit structures, and the no-load leakage coefficient is small, which improves the integrity and mechanical strength of the rotor assembly. It is suitable for the harsh work of flameproof motors. condition.
  • the angle of the fan blades of the cooling fan is set unequally, and the wind hood matched with the cooling fan is selected to reduce the ventilation loss and reduce the ventilation noise.
  • the power density is high, the volume is small, and the weight is light.
  • the same frame size uses less effective materials.
  • the explosion-proof structure is improved, and the protection performance is good.
  • the whole machine has an IP66 protection level and high safety.
  • Figure 1 is a schematic diagram of the assembly structure of the present invention
  • Figure 2 is an assembly diagram of the rotating shaft and rotor assembly
  • Fig. 3 is a structural schematic diagram of a rotor assembly
  • Fig. 4 is a structural schematic diagram of a rotor punching plate
  • Fig. 5 is a structural schematic diagram of a cooling fan.
  • the invention provides a level 1 energy efficiency flameproof asynchronous start three-phase permanent magnet synchronous motor, as shown in FIGS. 1 to 5.
  • the 1-stage energy-efficient flameproof asynchronous start three-phase permanent magnet synchronous motor includes a flameproof casing 2, a stator assembly 24 and a rotating shaft 1 installed with a permanent magnet rotor assembly 14, the stator assembly 24 is fixed in the flameproof casing 2, and the stator
  • the assembly 24 includes a stator core 241 and a stator coil 242.
  • the stator core 241 is made of cold-rolled silicon steel sheet material 50W350, and the stator coil 242 uses a low-harmonic winding structure.
  • the permanent magnet rotor assembly 14 includes a rotor core, a starter bar 142, magnetic steel 143, and a non-magnetic magnetic steel platen 144; the rotor core is formed by coaxially stacking rotor punches 141 and fixed on the rotating shaft 1, the rotor The punching plate 141 is provided with a plurality of starting cage bar installation grooves 1411 and a W-shaped magnetic steel groove.
  • the magnetic steel grooves are located radially inward of the starting cage bar installation grooves 1411, and the magnetic steel 143 is arranged in the corresponding magnetic steel grooves In the middle, the magnetic steel pressure plate 144 is correspondingly arranged at both ends of the rotor core and fixed by the tension screw 145 penetrating the rotor core; the starting cage bar 142 is correspondingly arranged in the starting cage bar installation groove 1411, and the starting cage bar is installed
  • the grooves 1411 are distributed in the radial direction on the near outer circumferential end surface of the rotor punch 141, and the groove shape of the starting cage mounting groove 1411 is a convex flat bottom groove, which enhances the squeeze effect and achieves effective magnetic isolation, and the starting cage 142 uses Cast aluminum.
  • the magnetic steel 143 uses permanent magnet material N35SH.
  • the adjacent starting cage bar installation grooves 1411 are arranged with unequal tooth widths, that is, the widths A and B between the adjacent starting cage bar installation grooves 1411 are different As shown in Figure 4, reduce the cogging torque, reduce the torque ripple, and then make its torque stable.
  • the starting cage mounting slot 1411 has a small height .
  • the W-shaped magnetic steel grooves include a plurality of radial grooves 1413 and fold grooves 1412.
  • the radial grooves 1413 are distributed in the radial direction.
  • the fold grooves 1412 are distributed between adjacent radial grooves 1413.
  • Adjacent radial grooves 1413 form a W-shaped groove; preferably, the radial grooves 1413 are provided with a number of them, which are specifically formulated according to the number of poles of the motor.
  • the radial grooves 1413 are provided with four parallel grooves Evenly spaced in the radial direction, and there is a gap between the radial groove 1413 and the starting cage mounting groove 1411 in the radial direction, and is called the magnetic isolation bridge, as shown by arrow h in FIG. 4, the length of the magnetic isolation bridge is 1.5 ⁇ 2.5mm, improve the magnetic isolation effect.
  • the W-shaped magnetic steel slot has the advantages of both a serial rotor structure and a parallel rotor structure. The rotor can be installed with more magnetic steel than the serial and parallel magnetic circuit structures, and the no-load leakage magnetic coefficient is small. .
  • the magnetic steel 143 is coated with epoxy resin and inserted into the magnetic steel groove of the rotor punching piece, and then the empty space of the magnetic steel groove is filled with a self-drying epoxy resin, and the magnetic steel 143 is firmly fixed to the rotor Inside the punching sheet 141, at the same time, the potting epoxy resin is conducive to the heat dissipation of the magnetic steel and prevents demagnetization caused by local overheating; Prevents the magnetic steel 143 from being thrown out during high-speed operation, further enhancing the reliability of the rotor assembly.
  • the magnetic circuit structure of the 1-stage energy-efficient flameproof asynchronous starting three-phase permanent magnet synchronous motor of the present invention is selected to be built-in.
  • the magnetic steel is installed in the rotor core between the starting cage 142 and the rotating shaft 1. Shaft inductance, the reluctance torque generated by the asymmetry of the magnetic circuit structure helps to improve the overload capacity and power density of the motor, and the built-in magnetic circuit structure is simple and reliable, which improves the integrity and mechanical strength of the rotor assembly , Suitable for the harsh working conditions of flameproof motors.
  • the explosion-proof casing is also provided with a cooling fan 4 and a wind hood 5, and the angle of the fan blades of the cooling fan 4 is unequally arranged, as shown in FIG. 5, and the wind hood 5 matched with the cooling fan is selected to reduce Ventilation loss reduces ventilation noise.
  • the ventilation loss is reduced by 10-20%, and the noise is reduced by 3-5 dB (A).
  • the explosion-proof casing of the motor is explosion-proof, has sufficient strength requirements, and is suitable for dangerous places containing flammable and explosive gases or coal dust such as petroleum, chemical or coal
  • the chassis 23 is a heat sink with an increased heat dissipation surface area Type structure, which effectively reduces the temperature rise of the motor, and the explosion-proof structure of the whole machine adopts a non-stop connection, so that the whole machine has a high protection grade of IP66, and the average efficiency is higher than that of the currently widely used YB3 flameproof three-phase asynchronous motor series Increased by about 3.1%, which meets the requirements of level 1 energy efficiency.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

一种一级能效隔爆型异步起动三相永磁同步电动机，包括隔爆外壳（2）、定子组件（24）和安装有永磁转子组件（14）的转轴（1），定子组件（24）固定在隔爆外壳（2）内，且定子组件（24）包括定子铁芯（241）和定子线圈（242），永磁转子组件（14）包括转子铁芯、起动笼条（142）、磁钢（143）以及非磁性的磁钢压板（144）；转子铁芯由转子冲片（141）同轴堆叠而成并固定于转轴（1）上，转子冲片（141）上设有若干个起动笼条安装槽（1411）及呈W型分布的磁钢槽。该隔爆型异步起动三相永磁同步电动机，通过内置式磁路结构，将磁钢槽呈W型分布，同时具有串联式转子结构和并联式转子结构的优点，转子组件（14）上可以安装的磁钢（143）比串联式和并联式磁路结构多，空载漏磁系数小，提高了转子组件（14）的整体性和机械强度，适合于隔爆型电机所处的恶劣工况。

Description

一种1级能效隔爆型异步起动三相永磁同步电动机 技术领域
本发明涉及一种隔爆型永磁电机，特别涉及一种1级能效隔爆型异步起动三相永磁同步电动机。
背景技术
节能减排是当今世界无法回避的一个话题，影响着世界经济的发展。电机系统作为工业领域中节能减排的重点，节能潜力十分巨大。隔爆型三相异步电动机，广泛应用于石油、化工、煤碳等行业，设备大都是常年连续运行，耗电量巨大。耗电量大的主要原因之一是隔爆型三相异步电动机本身效率低、功率因数低，且低负载率运行时效率和功率因数更低。对此世界各先进国家的能源法都相继制定出了中小型电动机的能效限定强制性标准,我国也制定了能效限定标准。
异步起动三相永磁同步电动机与三相异步电动机相比，既具备在三相工频交流电源下的自行起动的能力，又具有在宽负载范围内效率高、功率因数高的优点，更适合应用于一些对节能要求比较高，如采用风机、压缩机和油田抽油机等的场合。因此，在石油、化工、煤碳等行业推广节能高效的隔爆型异步起动三相永磁同步电动机替代隔爆型三相异步电动机可改变目前我国石油、化工或煤炭等行业电能浪费严重的现状，是一项利国利民，有较高的社会效益的电机产业升级活动。符合国家“节能环保”的指导方向，有着广泛的应用前景。
发明内容
本发明的目的是针对上述现有技术的不足，提供一种1级能效隔爆型异步起动三相永磁同步电动机，满足1级能效的要求。
为解决以上技术问题，本发明采用的技术方案是：该1级能效隔爆型异步起动三相永磁同步电动机，包括隔爆外壳、定子组件和安装有永磁转子组件的转轴，定子组件固定在隔爆外壳内，且定子组件包括定子铁芯和定子线圈，所述永磁转子组件包括转子铁芯、起动笼条、磁钢以及非磁性的磁钢压板；
转子铁芯由转子冲片同轴堆叠而成并固定于转轴上，转子冲片上设有若干个起动笼条安装槽及呈W型分布的磁钢槽，磁钢槽位于起动笼条安装槽的径向内侧，磁钢配设于相应的磁钢槽中，磁钢压板对应配设于转子铁芯的两端部并通过贯穿转子铁芯的拉紧螺杆固定；起动笼条对应配设于起动笼条安装槽中，起动笼条安装槽沿径向分布于转子冲片的近外圆周端面上，且起动笼条安装槽的槽型为凸形平底槽。
所述相邻的起动笼条安装槽为不等齿宽布设。
所述呈W型分布的磁钢槽包括若干个径向槽和折向槽，径向槽沿径向分布，折向槽分布于相邻的径向槽之间，并与相邻的径向槽围合成W型槽。
所述径向槽设有四个并沿径向间隔均匀分布。
所述径向槽与起动笼条安装槽间沿径向留有空隙，并称为隔磁桥，隔磁桥的长度 为1.5～2.5mm。
所述隔爆外壳外部还设有冷却风扇和风罩，且冷却风扇的扇叶夹角为不等分设置，风罩与冷却风扇相应配设。
所述定子铁芯采用冷轧硅钢片材料50W350制成，所述定子线圈采用低谐波绕组结构。
所述磁钢采用永磁材料。
所述磁钢采用永磁材料N35SH。
本发明的有益效果是：1)该隔爆型异步起动三相永磁同步电动机，通过内置式磁路结构，将磁钢槽呈W型分布，同时具有串联式转子结构和并联式转子结构的优点，转子组件上可以安装的磁钢比串联式和并联式磁路结构多，空载漏磁系数小，提高了转子组件的整体性和机械强度，适合于隔爆型电机所处的恶劣工况。
2)冷却风扇的扇叶夹角采用不等分设置，并选用与冷却风扇相配设的风罩，减少通风损耗，降低通风噪声。
3)功率密度高，体积小，重量轻，与YB3系列隔爆型三相异步电动机相比，相同机座号所用有效材料更少。
4)高效率，与相同规格YB3系列隔爆型三相异步电动机相比，具有更高的效率，同时经济运行范围宽，节能降耗效果显著；功率因数高，可减小无功能量的消耗。
5)隔爆结构改进，防护性能好，整机具有IP66防护等级，安全性高。
附图说明
图1是本发明的总装结构示意图；
图2是转轴和转子组件的装配示意图；
图3是转子组件的结构示意图；图4是转子冲片的结构示意图；图5是冷却风扇的结构示意图。
具体实施方式
以下由特定的具体实施例说明本发明的实施方式，熟悉此技术的人士可由本说明书所揭露的内容轻易地了解本发明的其他优点及功效。
请参阅图1。须知，本说明书所附图式所绘示的结构、比例、大小等，均仅用以配合说明书所揭示的内容，以供熟悉此技术的人士了解与阅读，并非用以限定本发明可实施的限定条件，故不具技术上的实质意义，任何结构的修饰、比例关系的改变或大小的调整，在不影响本发明所能产生的功效及所能达成的目的下，均应仍落在本发明所揭示的技术内容得能涵盖的范围内。同时，本说明书中所引用的如“上”、“下”、“左”、“右”、“中间”及“一”等的用语，亦仅为便于叙述的明了，而非用以限定本发明可实施的范围，其相对关系的改变或调整，在无实质变更技术内容下，当亦视为本发明可实施的范畴。
本发明提供了一种1级能效隔爆型异步起动三相永磁同步电动机，如图1至图5所示。该1级能效隔爆型异步起动三相永磁同步电动机，包括隔爆外壳2、定子组件24和安装有 永磁转子组件14的转轴1，定子组件24固定在隔爆外壳2内，且定子组件24包括定子铁芯241和定子线圈242，本实施例中，所述定子铁芯241采用冷轧硅钢片材料50W350制成，所述定子线圈242采用低谐波绕组结构。
所述永磁转子组件14包括转子铁芯、起动笼条142、磁钢143以及非磁性的磁钢压板144；转子铁芯由转子冲片141同轴堆叠而成并固定于转轴1上，转子冲片141上设有若干个起动笼条安装槽1411及呈W型分布的磁钢槽，磁钢槽位于起动笼条安装槽1411的径向内侧，磁钢143配设于相应的磁钢槽中，磁钢压板144对应配设于转子铁芯的两端部并通过贯穿转子铁芯的拉紧螺杆145固定；起动笼条142对应配设于起动笼条安装槽1411中，起动笼条安装槽1411沿径向分布于转子冲片141的近外圆周端面上，且起动笼条安装槽1411的槽型为凸形平底槽，增强挤流效应并达到有效隔磁，且起动笼条142采用铸铝式。优选的，所述磁钢143采用永磁材料N35SH。
本实施例中，为了削弱起动笼条142的转矩，所述相邻的起动笼条安装槽1411为不等齿宽布设，即相邻的起动笼条安装槽1411间的宽度A、B不同，如图4所示，降低齿槽转矩，减小转矩脉动，进而使其转矩平稳，同时为了提供足够的空间设置磁钢槽放置磁钢143，起动笼条安装槽1411高度较小。
所述呈W型分布的磁钢槽包括若干个径向槽1413和折向槽1412，径向槽1413沿径向分布，折向槽1412分布于相邻的径向槽1413之间，并与相邻的径向槽1413围合成W型槽；优选的，所述径向槽1413设有若干个，具体依据电机极数制定，本实施例中，所述径向槽1413设有四个并沿径向间隔均匀分布，且径向槽1413与起动笼条安装槽1411间沿径向留有空隙，并称为隔磁桥，如图4中箭头h所示，隔磁桥的长度为1.5～2.5mm，提高隔磁效果。该呈W型分布的磁钢槽，它同时具有串联式转子结构和并联式转子结构的优点，转子冲片上可以安装的磁钢比串联式和并联式磁路结构多，空载漏磁系数小。
装配时，将磁钢143涂上环氧树脂后插入到转子冲片的磁钢槽中，再用自干环氧树脂灌封填满磁钢槽的空余处，将磁钢143牢固固定于转子冲片141内部，同时，灌封环氧树脂有利于磁钢散热，防止局部过热产生退磁；而转子铁芯的两端部用非磁性的磁钢压板144压覆并用拉紧螺杆145拉紧，防止高速运转时磁钢143甩出，进一步增强转子组件的可靠性。
本发明的1级能效隔爆型异步起动三相永磁同步电动机的磁路结构选择内置式，磁钢安装于起动笼条142和转轴1之间的转子铁芯中，其交轴电感大于直轴电感，该磁路结构的不对称性所产生的磁阻转矩有助于提高电动机的过载能力和功率密度，且该内置式磁路结构简单可靠，提高了转子组件的整体性及机械强度，适合于隔爆型电机所处的恶劣工况。
所述隔爆外壳外部还设有冷却风扇4和风罩5，且冷却风扇4的扇叶夹角采用不等分设置，如图5所示，并选用与冷却风扇相配设的风罩5，减少通风损耗，降低通风噪声，本发明使用该新结构冷却风扇4及风罩5后，通风损耗降低10-20％，噪声降低3-5dB(A)。另外，该电动机的隔爆外壳防爆，具有足够的强度要求，适用于石油、化工或煤炭等含有易燃易爆气体或煤尘的危险场所，且机座23为具有加大散热表面积的散热片式结构，有效降低电机温升，而整机防爆结构采用止口连接，使整机具有IP66高防护等级，且效率平均值比目前国内广泛使用的YB3隔爆型三相异步电动机系列的效率平均约提高3.1％，符合1级能效的要求。
本专利中使用了“第一”、“第二”等词语来限定零部件的话，本领域技术人员应该 知晓：“第一”、“第二”的使用仅仅是为了便于描述本发明和简化描述，上述词语并没有特殊的含义。
以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下本发明还会有各种变化和改进，这些变化和改进都落入要求保护的发明范围内。本发明要求保护范围由所附的权利要求书及等同物界定。
在本发明的描述中，需要理解的是，术语“前”、“后”、“左”、“右”、“中心”、等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为便于描述本发明和简化描述，而不是指示或暗指所指的装置或元件必须具有特定的方位、为特定的方位构造和操作，因而不能理解为对本发明保护内容的限制。

Claims (9)

  1. 一种1级能效隔爆型异步起动三相永磁同步电动机，包括隔爆外壳、定子组件和安装有永磁转子组件的转轴，定子组件固定在隔爆外壳内，且定子组件包括定子铁芯和定子线圈，其特征在于：所述永磁转子组件包括转子铁芯、起动笼条、磁钢以及非磁性的磁钢压板；
    转子铁芯由转子冲片同轴堆叠而成并固定于转轴上，转子冲片上设有若干个起动笼条安装槽及呈W型分布的磁钢槽，磁钢槽位于起动笼条安装槽的径向内侧，磁钢配设于相应的磁钢槽中，磁钢压板对应配设于转子铁芯的两端部并通过贯穿转子铁芯的拉紧螺杆固定；起动笼条对应配设于起动笼条安装槽中，起动笼条安装槽沿径向分布于转子冲片的近外圆周端面上，且起动笼条安装槽的槽型为凸形平底槽。
  2. 根据权利要求1所述的一种1级能效隔爆型异步起动三相永磁同步电动机，其特征在于：所述相邻的起动笼条安装槽为不等齿宽布设。
  3. 根据权利要求1所述的一种1级能效隔爆型异步起动三相永磁同步电动机，其特征在于：所述呈W型分布的磁钢槽包括若干个径向槽和折向槽，径向槽沿径向分布，折向槽分布于相邻的径向槽之间，并与相邻的径向槽围合成W型槽。
  4. 根据权利要求3所述的一种1级能效隔爆型异步起动三相永磁同步电动机，其特征在于：所述径向槽设有四个并沿径向间隔均匀分布。
  5. 根据权利要求3所述的一种1级能效隔爆型异步起动三相永磁同步电动机，其特征在于：所述径向槽与起动笼条安装槽间沿径向留有空隙，并称为隔磁桥，隔磁桥的长度为1.5～2.5mm。
  6. 根据权利要求1至5任一项所述的一种1级能效隔爆型异步起动三相永磁同步电动机，其特征在于：所述隔爆外壳外部还设有冷却风扇和风罩，且冷却风扇的扇叶夹角为不等分设置，风罩与冷却风扇相应配设。
  7. 根据权利要求1至5任一项所述的一种1级能效隔爆型异步起动三相永磁同步电动机，其特征在于：所述定子铁芯采用冷轧硅钢片材料50W350制成，所述定子线圈采用低谐波绕组结构。
  8. 根据权利要求6所述的一种1级能效隔爆型异步起动三相永磁同步电动机，其特征在于：所述磁钢采用永磁材料。
  9. 根据权利要求7所述的一种1级能效隔爆型异步起动三相永磁同步电动机，其特征在于：所述磁钢采用永磁材料N35SH。
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