CN110601474A - Radial magnetic field composite flux switching motor - Google Patents
Radial magnetic field composite flux switching motor Download PDFInfo
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- CN110601474A CN110601474A CN201910873644.4A CN201910873644A CN110601474A CN 110601474 A CN110601474 A CN 110601474A CN 201910873644 A CN201910873644 A CN 201910873644A CN 110601474 A CN110601474 A CN 110601474A
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- 230000004907 flux Effects 0.000 title claims abstract description 22
- 239000002131 composite material Substances 0.000 title claims abstract description 16
- 238000004804 winding Methods 0.000 claims description 46
- 150000001875 compounds Chemical class 0.000 claims description 4
- 241001611138 Isma Species 0.000 claims 1
- 101100522751 Xenorhabdus nematophila (strain ATCC 19061 / DSM 3370 / CCUG 14189 / LMG 1036 / NCIMB 9965 / AN6) pvcA gene Proteins 0.000 claims 1
- 230000033228 biological regulation Effects 0.000 abstract description 12
- 230000005347 demagnetization Effects 0.000 abstract description 5
- 230000002427 irreversible effect Effects 0.000 abstract description 5
- 230000005284 excitation Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/02—Synchronous motors
- H02K19/10—Synchronous motors for multi-phase current
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- 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
- H02K21/38—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary
- H02K21/44—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary with armature windings wound upon the magnets
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Abstract
本发明涉及电机设计领域,公开了一种径向磁场复合型磁通切换电机,包括固定轴(6)、与固定轴同轴转动连接的转轴(5)、环绕转轴的内转子(4)、环绕内转子的内定子(3)、环绕内定子的轴承(23)、环绕轴承的外定子(2)、环绕外定子的外转子(1);外定子与外转子之间以及内定子与内转子之间均设置有气隙;内转子和外转子均与转轴固定连接,内定子与固定轴固定连接,轴承(23)径向内外侧分别与内定子外径和外定子内径连接。本发明在提高永磁体运行可靠性、避免永磁体因弱磁调速和高温导致的不可逆退磁的前提下,满足驱动电机低速大转矩和宽调速范围运行的要求。
The invention relates to the field of motor design, and discloses a radial magnetic field composite flux switching motor, which includes a fixed shaft (6), a rotating shaft (5) coaxially connected with the fixed shaft, an inner rotor (4) surrounding the rotating shaft, The inner stator (3) surrounding the inner rotor, the bearing (23) surrounding the inner stator, the outer stator (2) surrounding the bearing, the outer rotor (1) surrounding the outer stator; between the outer stator and the outer rotor and between the inner stator and the inner Air gaps are provided between the rotors; both the inner rotor and the outer rotor are fixedly connected to the rotating shaft, the inner stator is fixedly connected to the fixed shaft, and the radially inner and outer sides of the bearing (23) are respectively connected to the outer diameter of the inner stator and the inner diameter of the outer stator. On the premise of improving the operating reliability of the permanent magnet and avoiding irreversible demagnetization of the permanent magnet due to weak magnetic speed regulation and high temperature, the present invention satisfies the requirements of the drive motor for low-speed, high-torque operation and wide speed regulation range.
Description
技术领域technical field
本发明涉及电机设计领域,特别涉及一种径向磁场复合型磁通切换电机。The invention relates to the field of motor design, in particular to a radial magnetic field compound flux switching motor.
背景技术Background technique
近年来,磁通切换型永磁电机(简称FSPM)由于其高转矩密度和高效率而得到广泛研究,在该电机结构中,永磁体和绕组均放置在定子上,转子结构简单,提升了电机的可靠性和动态运行性能。但是,由于永磁体的固有特性,FSPM电机运行时的气隙磁场基本保持恒定不变,电动运行时,FSPM电机励磁控制困难、调速范围有限。因此,如何实现磁场的有限调节与控制,拓宽其调速范围,是FSPM电机待解决的难题之一。学者们就此对混合励磁FSPM电机进行了研究,在定子上除了永磁体,还设置了励磁绕组,实现双励磁源混合励磁方式,可提高磁场调节能力,拓宽转速运行范围。然而,这种电机结构中定子同时存在永磁体和两套绕组(励磁绕组和电枢绕组),一方面磁路饱和程度高,另一方面约束了电枢绕组放置空间,在一定程度上限制了转矩输出能力;且由于热源均位于定子中,易导致定子绕组和永磁体温升过高,带来绕组绝缘损坏和永磁体不可逆退磁。In recent years, the flux-switching permanent magnet motor (FSPM for short) has been extensively studied due to its high torque density and high efficiency. Motor reliability and dynamic running performance. However, due to the inherent characteristics of permanent magnets, the air-gap magnetic field of the FSPM motor remains basically constant during operation. During electric operation, the excitation control of the FSPM motor is difficult and the speed regulation range is limited. Therefore, how to realize the limited adjustment and control of the magnetic field and widen its speed regulation range is one of the difficult problems to be solved for FSPM motors. In this regard, scholars have conducted research on hybrid excitation FSPM motors. In addition to permanent magnets on the stator, excitation windings are also set to realize the dual excitation source hybrid excitation method, which can improve the magnetic field adjustment ability and broaden the speed operating range. However, in this motor structure, there are permanent magnets and two sets of windings (field winding and armature winding) in the stator at the same time. On the one hand, the saturation degree of the magnetic circuit is high; Torque output capability; and because the heat source is located in the stator, it is easy to cause the temperature of the stator winding and the permanent magnet to rise too high, resulting in damage to the winding insulation and irreversible demagnetization of the permanent magnet.
发明内容Contents of the invention
发明目的:针对现有技术中存在的问题,本发明提供一种径向磁场复合型磁通切换电机,在提高永磁体运行可靠性、避免永磁体因弱磁调速和高温导致的不可逆退磁的前提下,满足驱动电机低速大转矩和宽调速范围运行的要求。Purpose of the invention: Aiming at the problems existing in the prior art, the present invention provides a radial magnetic field composite flux switching motor, which can improve the operation reliability of permanent magnets and avoid irreversible demagnetization of permanent magnets caused by weak magnetic speed regulation and high temperature. Under the premise, it meets the requirements of low-speed, high-torque and wide speed range operation of the drive motor.
技术方案:本发明提供了一种径向磁场复合型磁通切换电机,包括固定轴、与所述固定轴同轴转动连接的转轴、环绕所述转轴的内转子、环绕所述内转子的内定子、环绕所述内定子的轴承、环绕所述轴承的外定子、环绕所述外定子的外转子;所述外定子与所述外转子之间以及所述内定子与所述内转子之间均设置有气隙;所述内转子和所述外转子均与所述转轴固定连接,所述内定子与所述固定轴固定连接,所述轴承径向内外侧分别与所述内定子外径和所述外定子内径连接。Technical solution: The present invention provides a radial magnetic field composite flux switching motor, which includes a fixed shaft, a rotating shaft coaxially connected with the fixed shaft, an inner rotor surrounding the rotating shaft, and an inner stator surrounding the inner rotor. stator, a bearing surrounding the inner stator, an outer stator surrounding the bearing, an outer rotor surrounding the outer stator; between the outer stator and the outer rotor and between the inner stator and the inner rotor Both are provided with an air gap; both the inner rotor and the outer rotor are fixedly connected to the rotating shaft, the inner stator is fixedly connected to the fixed shaft, and the inner and outer sides of the radial direction of the bearing are respectively connected to the outer diameter of the inner stator. Connect with the inner diameter of the outer stator.
进一步地,所述外转子与所述外定子的相对侧以及所述内转子与所述内定子的相对侧均设置有凸极齿,且所述外转子与所述内转子的凸极齿上无绕组,所述外定子的凸极齿上设置有外侧电枢绕组和永磁体,所述内定子的凸极齿上设置有内侧电枢绕组。Further, the opposite side of the outer rotor and the outer stator and the opposite side of the inner rotor and the inner stator are provided with salient pole teeth, and the salient pole teeth of the outer rotor and the inner rotor are There is no winding, the salient pole teeth of the outer stator are provided with outer armature windings and permanent magnets, and the salient pole teeth of the inner stator are provided with inner armature windings.
优选地,所述外定子的凸极齿的齿数为P so,所述外侧电枢绕组由对称分布的P so个套在所述外定子的凸极齿上的线圈构成,所述外侧电枢绕组为m相集中绕组,满足P so=2k 1 m,其中为k 1正整数;所述外转子的凸极齿的齿数为P ro,满足P ro=P so±2N1,其中N1为正整数。Preferably, the number of salient pole teeth of the outer stator is P so , the outer armature winding is composed of symmetrically distributed P so coils sleeved on the salient pole teeth of the outer stator, and the outer armature The winding is an m -phase concentrated winding, satisfying P so =2 k 1 m , where k 1 is a positive integer; the number of salient pole teeth of the outer rotor is P ro , satisfying P ro = P so ±2N 1 , where N 1 is a positive integer.
优选地,所述内定子的凸极齿的齿数为P si,所述内侧电枢绕组由对称分布的P si个套在所述内定子的凸极齿上的线圈构成,所述内侧电枢绕组为n相集中绕组,满足P si=2k 2 n,其中为k 2正整数;所述内转子的凸极齿的齿数为P ri,满足P ri=P si±2N2,其中N2为正整数。Preferably, the number of salient pole teeth of the inner stator is P si , the inner armature winding is composed of symmetrically distributed P si coils sleeved on the salient pole teeth of the inner stator, and the inner armature The winding is an n -phase concentrated winding, satisfying P si =2 k 2 n , where k 2 is a positive integer; the number of salient pole teeth of the inner rotor is P ri , satisfying P ri = P si ±2N 2 , where N 2 is a positive integer.
优选地,所述永磁体为切向交替充磁的永磁体。Preferably, the permanent magnets are tangentially alternately magnetized permanent magnets.
优选地,所述内转子轭部径向内缘固定在所述转轴上。Preferably, the radially inner edge of the inner rotor yoke is fixed on the rotating shaft.
优选地,所述外转子轭部铁芯的径向外缘通过连接壳体与所述转轴固定连接。Preferably, the radially outer edge of the outer rotor yoke core is fixedly connected to the rotating shaft through a connection housing.
优选地,所述内定子轭部铁芯通过端部壳体与所述固定轴固定连接。Preferably, the inner stator yoke core is fixedly connected to the fixed shaft through an end housing.
优选地,所述外转子、所述外定子、所述内转子以及所述内定子上的凸极齿朝向均指在径向上。Preferably, the directions of the salient pole teeth on the outer rotor, the outer stator, the inner rotor and the inner stator all refer to the radial direction.
优选地,所述内侧电枢绕组和所述外侧电枢绕组均为多相集中式电枢绕组。Preferably, both the inner armature winding and the outer armature winding are multi-phase concentrated armature windings.
有益效果:本发明的径向磁场复合电机,外定子和外转子构成外电机,内定子和内转子构成内电机;内、外电机完全独立,无电磁耦合,因此可独立控制。内电机和外电机有多种电机结构选择,如外电机可采用双凸极永磁电机和磁通反向电机。本发明的径向磁场复合型磁通切换电机的内电机和外电机的定子和转子的凸极齿的齿槽配合,相数及励磁方式等均可以依据系统性能要求灵活调整。Beneficial effects: In the radial magnetic field composite motor of the present invention, the outer stator and outer rotor form an outer motor, and the inner stator and inner rotor form an inner motor; the inner and outer motors are completely independent without electromagnetic coupling, so they can be independently controlled. There are various motor structure options for the inner motor and the outer motor. For example, the outer motor can adopt double salient pole permanent magnet motor and flux reversal motor. In the radial magnetic field composite flux switching motor of the present invention, the cogging of the inner motor and the outer motor's stator and the salient teeth of the rotor, the number of phases and the excitation mode can be flexibly adjusted according to system performance requirements.
与现有技术相比,本发明具有如下优点:Compared with prior art, the present invention has following advantage:
1、本发明内定子和内转子上均无永磁体,因此可避免内电机不易散热导致的永磁体高温不可逆退磁;外电机虽有永磁体,但是由于定子上轴承的作用,高速工况时,由内电机完成调速,外电机的外定子在转子高速旋转时通过同向旋转可始终工作于额定点附近,完成增加转矩输出的同时,避免了外电机弱磁调速带来的永磁体不可逆退磁风险;从上述两点来看,本发明提高了永磁体工作稳定性,提高了电机工作的可靠性。1. There are no permanent magnets on the inner stator and inner rotor of the present invention, so it can avoid irreversible demagnetization of the permanent magnet caused by the difficulty of heat dissipation of the inner motor; although the outer motor has permanent magnets, due to the role of the bearing on the stator, under high-speed working conditions, The speed regulation is completed by the inner motor, and the outer stator of the outer motor can always work near the rated point by rotating in the same direction when the rotor rotates at high speed. While increasing the torque output, it avoids the permanent magnet caused by the weak magnetic field speed regulation of the outer motor Risk of irreversible demagnetization; from the above two points, the present invention improves the working stability of the permanent magnet and improves the reliability of the motor.
2. 本发明中内定子和内转子构成调速电机,具有较宽调速范围,外定子和外转子构成永磁调矩电机,具有较大的转矩输出能力,两电机运行中分别用于调节转速和转矩,以实现不同工况下负载的功率需求,满足驱动系统低速大转矩和宽调速范围的要求。2. In the present invention, the inner stator and the inner rotor form a speed-regulating motor, which has a wider speed-regulating range. The outer stator and the outer rotor form a permanent magnet torque-adjusting motor, which has a larger torque output capability. The two motors are used for Adjust the speed and torque to meet the power demand of the load under different working conditions, and meet the requirements of the drive system for low speed, high torque and wide speed range.
3. 本发明中内电机和外电机可运行于单独驱动或共同驱动等不同工作模式,可当调矩外电机永磁体工作出现故障时,可使调速内电机单独运行,因此本发明中电机具有一定的容错性。3. In the present invention, the inner motor and the outer motor can operate in different working modes such as independent drive or common drive, and when the permanent magnet of the torque-adjusting outer motor fails, the speed-regulating inner motor can be operated independently, so the motor in the present invention Has a certain degree of fault tolerance.
附图说明Description of drawings
图1是一台内电机为3相定子12槽/转子8极、外电机为3相定子12槽/转子22极的径向磁场复合型磁通切换电机的断面图。Figure 1 is a cross-sectional view of a radial magnetic field composite flux switching motor with an inner motor of 3-phase stator with 12 slots/rotor with 8 poles and an outer motor with a 3-phase stator with 12 slots/rotor with 22 poles.
图2是本发明径向磁场复合型磁通切换电机的截面图。Fig. 2 is a cross-sectional view of the radial field composite flux switching motor of the present invention.
图中:1外转子,2外定子,3内定子,4内转子,21外电枢绕组,22永磁体,23轴承,31内电枢绕组,5转轴,6固定轴,7连接壳体,8端部壳体。In the figure: 1 outer rotor, 2 outer stator, 3 inner stator, 4 inner rotor, 21 outer armature winding, 22 permanent magnet, 23 bearing, 31 inner armature winding, 5 rotating shaft, 6 fixed shaft, 7 connecting shell, 8 end shell.
具体实施方式Detailed ways
下面结合附图对本发明进行详细的介绍。The present invention will be described in detail below in conjunction with the accompanying drawings.
本实施方式提供了一种径向磁场复合型磁通切换电机,主要包括固定轴6、与固定轴6同轴转动连接的转轴5、环绕转轴5的内转子4、环绕内转子4的内定子3、环绕内定子3的轴承23、环绕轴承23的外定子2、环绕外定子2的外转子1。外定子2与外转子1之间设置有气隙,内定子3与内转子4之间设置有气隙,外转子1朝向外定子2的一侧和内转子4朝向内定子3的一侧均设置有无绕组的凸极齿,外定子2外侧设置有凸极齿及绕在凸极齿上的外电枢绕组21,内定子3内侧设置有凸极齿及绕在凸极齿上的内电枢绕组31。内转子4轭部径向内缘固定在转轴5上,外转子1轭部铁芯的径向外缘通过连接壳体7与转轴5固定连接,内定子3轭部铁芯通过端部壳体8与另一侧固定轴6连接固定,外定子2内径与内定子3外径之间设置有轴承23,轴承23径向内外侧分别与内定子3外径和外定子2内径连接,外定子2凸极齿中设置有切向交替充磁的永磁体22。需要指出的是,本发明中定子和转子的凸极朝向均指在径向上。This embodiment provides a radial magnetic field compound flux switching motor, which mainly includes a fixed shaft 6, a rotating shaft 5 coaxially rotatably connected with the fixed shaft 6, an inner rotor 4 surrounding the rotating shaft 5, and an inner stator surrounding the inner rotor 4 3. The bearing 23 surrounding the inner stator 3, the outer stator 2 surrounding the bearing 23, and the outer rotor 1 surrounding the outer stator 2. An air gap is provided between the outer stator 2 and the outer rotor 1, and an air gap is provided between the inner stator 3 and the inner rotor 4. The side of the outer rotor 1 facing the outer stator 2 and the side of the inner rotor 4 facing the inner stator 3 are both There are salient pole teeth without windings, the outer stator 2 is provided with salient pole teeth and the outer armature winding 21 wound on the salient pole teeth, and the inner stator 3 is provided with salient pole teeth and the inner electric coil wound on the salient pole teeth. Pivot winding 31. The radially inner edge of the yoke of the inner rotor 4 is fixed on the rotating shaft 5, the radially outer edge of the yoke core of the outer rotor 1 is fixedly connected to the rotating shaft 5 through the connecting shell 7, and the yoke core of the inner stator 3 passes through the end shell 8 is connected and fixed with the fixed shaft 6 on the other side. A bearing 23 is arranged between the inner diameter of the outer stator 2 and the outer diameter of the inner stator 3. The inner and outer sides of the radial direction of the bearing 23 are respectively connected with the outer diameter of the inner stator 3 and the inner diameter of the outer stator 2. The outer stator 2. Permanent magnets 22 that are tangentially and alternately magnetized are arranged in the salient pole teeth. It should be pointed out that, in the present invention, the orientation of the salient poles of the stator and the rotor both refer to the radial direction.
图1所示为一台内电机为3相定子12槽/转子8极、外电机为3相定子12槽/转子22极的径向磁场复合型磁通切换电机,下面以该电机为例具体说明本实施方式的技术方案。Figure 1 shows a radial magnetic field compound flux switching motor with a 3-phase stator with 12 slots/rotor with 8 poles as the inner motor and a 3-phase stator with 12 slots/rotor with 22 poles as the outer motor. The motor is used as an example below for details The technical solution of this embodiment is demonstrated.
外定子2沿圆周分布有12块永磁体22,相邻两块永磁体22之间为铁心凹槽单元,其槽口朝向外转子1,12块铁心凹槽单元与12块永磁体沿圆周交替放置,每块永磁体22与其切向两侧相邻的两个定子齿构成一个外定子2的凸极齿,外定子2的12个凸极齿上绕有12个绕组线圈,其中每间隔90度的4个绕组线圈同向串联组成一相集中绕组,从而构成三相集中电枢绕组,即外侧电枢绕组21。外转子1的凸极齿的数量为22个,且其凸极齿朝向外定子2。外转子1、外定子2及其上的永磁体22和外侧电枢绕组21组成三相12/22极永磁磁通切换外电机。内定子3为内侧凸极齿结构,其上无永磁体,12个凸极齿上套有12个电枢绕组线圈,每4个串联组成一相集中绕组,从而构成三相内电枢绕组,即内侧电枢绕组31,内转子4的凸极齿的齿数为8,内转子4、内定子3及其上的内侧电枢绕组31组成三相12/8极开关磁阻内电机。The outer stator 2 has 12 permanent magnets 22 distributed along the circumference, and between two adjacent permanent magnets 22 is an iron core groove unit, whose notch faces the outer rotor 1, and the 12 iron core groove units and 12 permanent magnets alternate along the circumference placed, each permanent magnet 22 and its tangential two adjacent stator teeth form a salient pole tooth of an outer stator 2, and 12 winding coils are wound on the 12 salient pole teeth of the outer stator 2, wherein each interval is 90 The four winding coils of the same degree are connected in series in the same direction to form a concentrated winding of one phase, thereby forming a concentrated armature winding of three phases, that is, the outer armature winding 21. The number of salient pole teeth of the outer rotor 1 is 22, and its salient pole teeth face the outer stator 2 . The outer rotor 1, the outer stator 2, the permanent magnet 22 on them and the outer armature winding 21 form a three-phase 12/22 pole permanent magnet flux switching outer motor. The inner stator 3 is an inner salient pole tooth structure, without permanent magnets on it, and 12 armature winding coils are sheathed on the 12 salient pole teeth, and every 4 are connected in series to form a concentrated winding of one phase, thereby forming a three-phase inner armature winding. That is, the inner armature winding 31, the number of salient pole teeth of the inner rotor 4 is 8, the inner rotor 4, the inner stator 3 and the inner armature winding 31 on it form a three-phase 12/8 pole switched reluctance inner motor.
上述内电机采用开关磁阻电机,结构简单,适于高速运行,电机易于冷却,且由于内定子3和内转子4上均无永磁体,可允许有较高的温升。上述外电机采用永磁磁通切换电机结构,外转子结构简单,且具有高转矩密度和高效率。由于外转子1和内转子4均与转轴5固定连接,因此内电机和外电机具有相同的转子转速,内定子3固定在固定轴6上,无转速,外定子2由于轴承23的存在可根据工况以一定转速旋转。The above-mentioned inner motor adopts a switched reluctance motor, which has a simple structure and is suitable for high-speed operation. The motor is easy to cool, and because there are no permanent magnets on the inner stator 3 and inner rotor 4, a higher temperature rise is allowed. The above-mentioned outer motor adopts a permanent magnet flux switching motor structure, and the outer rotor has a simple structure, and has high torque density and high efficiency. Since the outer rotor 1 and the inner rotor 4 are fixedly connected to the rotating shaft 5, the inner motor and the outer motor have the same rotor speed, the inner stator 3 is fixed on the fixed shaft 6, and has no speed, and the outer stator 2 can be rotated according to the bearing 23 The working condition rotates at a certain speed.
本实施方式中,内电机根据运行要求,主要完成电机的调速,使得转轴5以目标转速旋转,同时输出一定的转矩;外电机可使得外定子2与外转子1同向差速旋转,使得外电机工作在效率较高的额定点附近,弥补内电机输出转矩的不足。因此内、外电机分别负责调速和调矩,内电机体积小,适合高速运行,且无永磁体,因此调速过程中无需永磁体参与弱磁调速;同时外电机转矩密度大,具有较大的转矩输出能力,且由于轴承23的作用,在不同工况时外电机可始终工作在额定点附近,因此无论是低速还是高速运行时,内电机输出转矩的不足均可由外电机提供,从而实现电机低速大转矩和宽调速范围运行的需求。In this embodiment, the inner motor mainly completes the speed regulation of the motor according to the operation requirements, so that the rotating shaft 5 rotates at the target speed, and at the same time outputs a certain torque; the outer motor can make the outer stator 2 and the outer rotor 1 rotate in the same direction at a differential speed, Make the outer motor work near the rated point with higher efficiency, and make up for the lack of output torque of the inner motor. Therefore, the inner and outer motors are respectively responsible for speed regulation and torque regulation. The inner motor is small in size, suitable for high-speed operation, and has no permanent magnets, so no permanent magnets are required to participate in the field-weakening speed regulation during the speed regulation process; at the same time, the outer motor has a large torque density and has Larger torque output capacity, and due to the function of the bearing 23, the outer motor can always work near the rated point under different working conditions, so whether it is running at low speed or high speed, the lack of output torque of the inner motor can be solved by the outer motor Provided, so as to realize the motor's demand for low-speed high-torque and wide speed range operation.
此复合型电机的内外两个电机系统之间无电磁耦合,可按照两个普通电机进行独立控制,可控参数大大多于普通磁通切换电机,十分灵活。内、外电机根据不同的工况需求可运行于单机驱动、双机共同驱动、双机发电等不同工作模式,内、外电机都做发电运行时,可以输出两组不同功率、频率、幅值和电压等级的电能;内、外电机系统也可以一个做发电运行,另一个做电动运行,以满足不同的应用场合与性能需求。There is no electromagnetic coupling between the inner and outer motor systems of this composite motor, and it can be independently controlled according to two ordinary motors. The controllable parameters are much more than ordinary flux switching motors, and it is very flexible. The inner and outer motors can operate in different working modes such as single-machine drive, double-machine joint drive, and double-machine power generation according to different working conditions. When both the inner and outer motors are used for power generation, they can output two sets of different power, frequency, and amplitude. and voltage levels of electric energy; the internal and external motor systems can also be used for power generation operation, and the other for electric operation to meet different application occasions and performance requirements.
本发明提出的电机在一个径向磁场电机空间内将永磁磁通切换外电机和开关磁阻内电机集成起来,提供两条功率流动路径。内电机和外电机均可采用其他的电机结构,大大提高了系统的灵活性,拓展了应用范围。The motor proposed by the invention integrates the permanent magnet flux switching outer motor and the switched reluctance inner motor in a radial magnetic field motor space, and provides two power flow paths. Both the inner motor and the outer motor can adopt other motor structures, which greatly improves the flexibility of the system and expands the scope of application.
上述实施方式只为说明本发明的技术构思及特点,其目的在于让熟悉此项技术的人能够了解本发明的内容并据以实施,并不能以此限制本发明的保护范围。凡根据本发明精神实质所做的等效变换或修饰,都应涵盖在本发明的保护范围之内。The above-mentioned embodiments are only for illustrating the technical concept and characteristics of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and not to limit the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.
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