CN115622305A - A generator with constant speed and frequency regulation function - Google Patents

A generator with constant speed and frequency regulation function Download PDF

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Publication number
CN115622305A
CN115622305A CN202211374554.9A CN202211374554A CN115622305A CN 115622305 A CN115622305 A CN 115622305A CN 202211374554 A CN202211374554 A CN 202211374554A CN 115622305 A CN115622305 A CN 115622305A
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rotor
pole group
winding
stator
rotor pole
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祝子冲
邓钧
张广明
欧阳慧珉
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Nanjing Tech University
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Nanjing Tech University
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K3/00Details of windings
    • H02K3/04Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28Layout of windings or of connections between windings
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2706Inner rotors
    • H02K1/272Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753Inner 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
    • H02K1/278Surface mounted magnets; Inset magnets
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2786Outer rotors
    • H02K1/2787Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2789Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2791Surface mounted magnets; Inset magnets
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K16/00Machines with more than one rotor or stator
    • H02K16/02Machines with one stator and two or more rotors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2213/00Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/64Electric machine technologies in electromobility

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

本发明公开了一种具有定速调频功能的发电机,包括定子和转子,定子包括定子铁心、第一绕组和第二绕组,第一绕组和第二绕组均绕制于定子铁心,第二绕组相比于第一绕组在定子的径向上更靠近转子,转子包括转轴以及设置在转轴周向的第一转子磁极组和第二转子磁极组,第二转子磁极组相比于第一转子磁极组在转子的径向上更靠近定子,组成第一转子磁极组和第二转子磁极组的磁体的极性在各自的圆周方向交替变化,第一转子磁极组和第二转子磁极组的极数不同,第一转子磁极组的极数与第一绕组的极数相同,第二转子磁极组的极数与第二绕组的极数相同。本发明不需采用功率电力电子器件变频,可在恒定转速下实现变频输出。

Figure 202211374554

The invention discloses a generator with constant speed and frequency modulation function, comprising a stator and a rotor, the stator comprises a stator core, a first winding and a second winding, both the first winding and the second winding are wound on the stator core, the second winding Compared with the first winding, it is closer to the rotor in the radial direction of the stator, and the rotor includes a rotating shaft and a first rotor magnetic pole group and a second rotor magnetic pole group arranged in the circumferential direction of the rotating shaft. Compared with the first rotor magnetic pole group, the second rotor magnetic pole group Closer to the stator in the radial direction of the rotor, the polarities of the magnets constituting the first rotor pole group and the second rotor pole group alternately change in their respective circumferential directions, and the pole numbers of the first rotor pole group and the second rotor pole group are different, The number of poles of the first rotor magnetic pole set is the same as that of the first winding, and the number of poles of the second rotor magnetic pole set is the same as that of the second winding. The invention does not need frequency conversion of power electronic devices, and can realize frequency conversion output at a constant rotating speed.

Figure 202211374554

Description

一种具有定速调频功能的发电机A generator with constant speed and frequency regulation function

技术领域technical field

本发明涉及一种发电机,特别是涉及一种具有定速调频功能的发电机。The invention relates to a generator, in particular to a generator with the function of constant speed and frequency regulation.

背景技术Background technique

随着交通电气化的快速发展,电驱动车辆辅助系统的负载功率和转速等级趋向多样。永磁电机具有功率密度高、效率高及动态特性好等优点,在各类交通电驱动系统中得到了广泛应用。无刷永磁电机转子磁场由高性能永磁体建立,在充磁完成后极数和磁性能恒定,因此具有优异的输出特性和转矩保持能力。然而,恒定的磁体性能和极数导致电机转速无法像异步电机一样实现自主调节,必须借助于功率电力电子器件实现调频调速。类似地,在发电机系统中,原动机转速恒定时,输出的交流电磁量频率恒定,只能借助于电力电子器件调频或整流、逆变后提供给各类频率不同的负载使用。With the rapid development of transportation electrification, the load power and speed levels of electric drive vehicle auxiliary systems tend to be diverse. Permanent magnet motors have the advantages of high power density, high efficiency and good dynamic characteristics, and have been widely used in various transportation electric drive systems. The rotor magnetic field of the brushless permanent magnet motor is established by high-performance permanent magnets, and the number of poles and magnetic properties are constant after magnetization is completed, so it has excellent output characteristics and torque retention. However, the constant magnet performance and number of poles lead to the fact that the motor speed cannot be adjusted autonomously like an asynchronous motor, and power electronic devices must be used to realize frequency regulation and speed regulation. Similarly, in the generator system, when the speed of the prime mover is constant, the frequency of the output AC electromagnetic quantity is constant, and it can only be used by frequency modulation, rectification, and inversion of power electronic devices for various loads with different frequencies.

采用功率电力电子器件调频时,系统的复杂度和体积大幅提高,功率密度和效率降低,加工制造难度增大,成本显著增加。另一方面,各类功率电力电子器件耐温性不高,过载能力差,抗电磁干扰能力弱,控制算法冗余度不高,在复杂工况以及特殊应用环境下可靠性不高。同时,对于不需要连续调频的应用,功率电力电子调速的优势不能充分发挥,不具备性能比较优势。另外,功率电力电子器件在整流、稳压及逆变过程中会引入新的干扰,不利于驱动负载及同一安装环境下的其他设备稳定运行。When the frequency modulation of power electronic devices is used, the complexity and volume of the system will be greatly increased, the power density and efficiency will be reduced, the difficulty of processing and manufacturing will increase, and the cost will increase significantly. On the other hand, all kinds of power electronic devices have low temperature resistance, poor overload capacity, weak anti-electromagnetic interference ability, low redundancy of control algorithms, and low reliability in complex working conditions and special application environments. At the same time, for applications that do not require continuous frequency regulation, the advantages of power electronic speed regulation cannot be fully utilized, and there is no comparative advantage in performance. In addition, power electronic devices will introduce new interference in the process of rectification, voltage stabilization and inverter, which is not conducive to the stable operation of driving loads and other equipment in the same installation environment.

发明内容Contents of the invention

为了克服上述现有技术的不足,本发明提供了一种具有定速调频功能的发电机,解决原动机转速恒定时的变频问题,实现两级变频输出。In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a generator with constant-speed frequency modulation function, which solves the frequency conversion problem when the prime mover rotates at a constant speed, and realizes two-stage frequency conversion output.

本发明技术方案如下:一种具有定速调频功能的发电机,包括定子和转子,所述定子包括定子铁心、第一绕组和第二绕组,所述第一绕组和所述第二绕组均绕制于所述定子铁心,所述第二绕组相比于所述第一绕组在所述定子的径向上更靠近所述转子,所述转子包括转轴以及设置在转轴周向的第一转子磁极组和第二转子磁极组,所述第二转子磁极组相比于所述第一转子磁极组在所述转子的径向上更靠近所述定子,组成所述第一转子磁极组和所述第二转子磁极组的磁体的极性在各自的圆周方向交替变化,所述第一转子磁极组和所述第二转子磁极组的极数不同,所述第一转子磁极组的极数与所述第一绕组的极数相同,所述第二转子磁极组的极数与所述第二绕组的极数相同。The technical solution of the present invention is as follows: a generator with constant speed and frequency modulation function, including a stator and a rotor, the stator includes a stator core, a first winding and a second winding, and both the first winding and the second winding are wound Manufactured on the stator core, the second winding is closer to the rotor in the radial direction of the stator than the first winding, and the rotor includes a rotating shaft and a first rotor pole group arranged in the circumferential direction of the rotating shaft and a second rotor pole group, the second rotor pole group is closer to the stator in the radial direction of the rotor than the first rotor pole group, forming the first rotor pole group and the second rotor pole group The polarities of the magnets of the rotor pole group alternately change in respective circumferential directions, the number of poles of the first rotor pole group and the second rotor pole group are different, and the number of poles of the first rotor pole group is different from that of the second rotor pole group. The number of poles of the first winding is the same, and the number of poles of the second rotor magnetic pole group is the same as that of the second winding.

进一步地,所述定子设置于所述转子的外围,所述第二转子磁极组为一整体式磁环。如此在第二转子磁极组外可以不再需要设置非导磁保护套。Further, the stator is arranged on the periphery of the rotor, and the second rotor pole set is an integral magnetic ring. In this way, it is no longer necessary to arrange a non-magnetically conductive protective cover outside the second rotor magnetic pole group.

本发明的另一技术方案如下:一种具有定速调频功能的发电机,包括定子、第一转子和第二转子,所述定子设置于所述第一转子和所述第二转子之间,所述定子包括定子铁心、第一绕组和第二绕组,所述第一绕组和所述第二绕组均绕制于所述定子铁心,所述第一绕组在径向上靠近所述第一转子,所述第二绕组在径向上靠近所述第二转子,所述第一转子和所述第二转子具有一共同转轴,所述第一转子设有围绕所述定子外侧周向设置的第一转子磁极组,所述第二转子设有围绕所述定子内侧周向设置的第二转子磁极组,所述第一转子磁极组与所述第二转子磁极组的极数不同,所述第一转子磁极组的极数与所述第一绕组的极数相同,所述第二转子磁极组的极数与所述第二绕组的极数相同。Another technical solution of the present invention is as follows: a generator with a constant-speed and frequency-regulating function includes a stator, a first rotor and a second rotor, the stator is arranged between the first rotor and the second rotor, The stator includes a stator core, a first winding and a second winding, both the first winding and the second winding are wound on the stator core, the first winding is radially close to the first rotor, The second winding is radially close to the second rotor, the first rotor and the second rotor have a common rotating shaft, and the first rotor is provided with a first rotor circumferentially arranged around the outer side of the stator magnetic pole set, the second rotor is provided with a second rotor magnetic pole set circumferentially arranged around the inner side of the stator, the number of poles of the first rotor magnetic pole set is different from that of the second rotor magnetic pole set, and the first rotor The number of poles of the magnetic pole group is the same as that of the first winding, and the number of poles of the second rotor magnetic pole group is the same as that of the second winding.

进一步地,所述第一转子磁极组和/或所述第二转子磁极组为直流励磁绕组。Further, the first rotor pole set and/or the second rotor pole set are DC field windings.

进一步地,所述第一转子磁极组和所述第二转子磁极组的磁体充磁方向相同,均为径向或平行方式充磁。Further, the magnetization directions of the first rotor pole group and the second rotor pole group are the same, and both are magnetized in a radial or parallel manner.

进一步地,所述第一转子磁极组和所述第二转子磁极组的磁体在周向均匀间隔布置。Further, the magnets of the first rotor pole group and the second rotor pole group are evenly spaced in the circumferential direction.

本发明所提供的技术方案的优点在于:The advantage of the technical solution provided by the present invention is:

本发明无需借助电力电子变频技术实现二级变频输出,原动机转速恒定时,通过简单地切换绕组可以发出不同频率的交流电,用于驱动不同频率需求的负载。其次,所提出的发电机系统结构简单,效率高,可靠性高。同时,不采用昂贵的电力电子器件,发电机系统的材料和安装应用成本降低,控制难度减小。再者,消除变频系统后,发电机的体积大幅减小,功率密度高,对安装环境要求降低,对外界的干扰小,应用范围更为广泛。The invention does not need to use power electronic frequency conversion technology to realize the secondary frequency conversion output. When the prime mover rotates at a constant speed, alternating currents of different frequencies can be generated by simply switching windings to drive loads with different frequency requirements. Second, the proposed generator system has a simple structure, high efficiency, and high reliability. At the same time, without using expensive power electronic devices, the cost of materials and installation and application of the generator system is reduced, and the difficulty of control is reduced. Furthermore, after eliminating the frequency conversion system, the volume of the generator is greatly reduced, the power density is high, the requirements for the installation environment are reduced, the interference to the outside world is small, and the application range is wider.

附图说明Description of drawings

图1为实施例1的具有定速调频功能的发电机结构示意图。Fig. 1 is a schematic structural diagram of a generator with constant-speed and frequency-regulating functions in Embodiment 1.

图2为实施例1的具有定速调频功能的发电机的定子铁心及第一绕组结构示意图。FIG. 2 is a structural schematic diagram of the stator core and the first winding of the generator with constant-speed and frequency-regulating functions in Embodiment 1. FIG.

图3为实施例1的具有定速调频功能的发电机的定子铁心及第二绕组结构示意图。FIG. 3 is a structural schematic diagram of the stator core and the second winding of the generator with constant-speed and frequency-regulating functions in Embodiment 1. FIG.

图4为实施例1的具有定速调频功能的发电机的转子结构示意图。FIG. 4 is a schematic diagram of the rotor structure of the generator with constant-speed and frequency-regulating function in Embodiment 1. FIG.

图5为实施例2的具有定速调频功能的发电机结构示意图。Fig. 5 is a structural schematic diagram of a generator with constant speed and frequency regulation function in Embodiment 2.

图6为实施例2的具有定速调频功能的发电机的定子结构示意图。Fig. 6 is a schematic structural diagram of the stator of the generator with constant-speed and frequency-regulating functions in Embodiment 2.

图7为实施例2的具有定速调频功能的发电机的转子结构示意图。Fig. 7 is a schematic diagram of the rotor structure of the generator with constant-speed and frequency-regulating function in Embodiment 2.

图8为实施例3的具有定速调频功能的发电机结构示意图。Fig. 8 is a schematic structural diagram of a generator with constant-speed and frequency-regulating functions in Embodiment 3.

图9为实施例3的具有定速调频功能的发电机的定子结构示意图。Fig. 9 is a schematic structural diagram of the stator of the generator with constant-speed and frequency-regulating functions in Embodiment 3.

图10为实施例3的具有定速调频功能的发电机的转子结构示意图。Fig. 10 is a schematic diagram of the rotor structure of the generator with constant-speed and frequency-regulating function in Embodiment 3.

具体实施方式detailed description

下面结合实施例对本发明作进一步说明,但不作为对本发明的限定。The present invention will be further described below in conjunction with the examples, but not as a limitation of the present invention.

实施例1,请参照图1至图4所示,本实施例涉及了一种具有定速调频功能的发电机,其额定功率为3000W,额定转速为5400r/min。具有定速调频功能的发电机包括有一个定子100和一个转子101,定子100设置在转子101外围,为外定子100内转子101 结构。Embodiment 1, please refer to Fig. 1 to Fig. 4, this embodiment relates to a generator with constant speed and frequency modulation function, its rated power is 3000W, and its rated speed is 5400r/min. The generator with constant speed and frequency modulation function includes a stator 100 and a rotor 101 , the stator 100 is arranged on the periphery of the rotor 101 , and has an outer stator 100 and an inner rotor 101 structure.

定子100包括由0.35mm无取向硅钢片叠压而成的定子铁心1001,以及在定子铁心1001上绕设的两组三相绕组,即第一绕组1002和第二绕组1003。定子铁心1001沿周向开有18个均匀分布的槽1001a,开槽1001a形成的18个定子齿1001b上按内外层分别绕制第一绕组1002和第二绕组1003。第一绕组1002绕制为外圈,其包含9个线圈,每个第一绕组1002的线圈横跨两个定子齿1001b,第一绕组1002的线圈的节距为2,匝数为12,构成一个6极9槽绕组,如图2所示。第二绕组1003绕制为内圈,相比第一绕组1002更接近转子101,同样包含9个线圈,第二绕组1003的线圈横跨两个定子齿1001b,节距为2,匝数为15,构成一个8极9槽绕组,如图3所示。The stator 100 includes a stator core 1001 made of laminated 0.35 mm non-oriented silicon steel sheets, and two sets of three-phase windings wound on the stator core 1001 , namely the first winding 1002 and the second winding 1003 . The stator core 1001 has 18 uniformly distributed slots 1001a along the circumference, and the 18 stator teeth 1001b formed by the slots 1001a are respectively wound with a first winding 1002 and a second winding 1003 according to inner and outer layers. The first winding 1002 is wound as an outer ring, which includes 9 coils, each coil of the first winding 1002 spans two stator teeth 1001b, the pitch of the coils of the first winding 1002 is 2, and the number of turns is 12, forming A 6-pole 9-slot winding, as shown in Figure 2. The second winding 1003 is wound as an inner ring, which is closer to the rotor 101 than the first winding 1002, and also includes 9 coils. The coil of the second winding 1003 spans two stator teeth 1001b, the pitch is 2, and the number of turns is 15. , forming an 8-pole 9-slot winding, as shown in Figure 3.

请结合图4所示,发电机的转子101位于定子100内部,包括转轴1011以及围绕转轴1011并在转轴1011周向布置的第一转子磁极组1012和第二转子磁极组1013。转轴1011由45#导磁钢加工制造,连接柴油机输出轴上。第一转子磁极组1012包含6个永磁体,6个永磁体沿圆周均匀分布,贴于转轴1011的外侧,采用径向充磁,磁体极性交错排列,构成6个磁极,第一转子磁极组1012的极数与第一绕组1002的极数相同。As shown in FIG. 4 , the rotor 101 of the generator is located inside the stator 100 , including a shaft 1011 and a first rotor pole set 1012 and a second rotor pole set 1013 that surround the shaft 1011 and are arranged circumferentially on the shaft 1011 . The rotating shaft 1011 is processed and manufactured by 45# magnetic steel, and is connected to the output shaft of the diesel engine. The first rotor pole group 1012 includes 6 permanent magnets, which are evenly distributed along the circumference and attached to the outside of the rotating shaft 1011. Radial magnetization is adopted, and the polarities of the magnets are staggered to form 6 magnetic poles. The first rotor pole group The number of poles of 1012 is the same as the number of poles of the first winding 1002 .

第二转子磁极组1013包含8个永磁体,8个永磁体沿圆周均匀分布,贴于第一转子磁极组1012的外侧,采用径向充磁,磁体极性交错排列,构成8个磁极,第二转子磁极组1013的极数与第二绕组1003的极数相同。在本实施例中,第二转子磁极组1013 的外侧套有不导磁的护套1014,护套1014由Inconel 718合金钢制作。The second rotor pole set 1013 includes 8 permanent magnets, which are uniformly distributed along the circumference and attached to the outside of the first rotor pole set 1012. Radial magnetization is adopted, and the polarities of the magnets are staggered to form 8 poles. The number of poles of the second rotor pole set 1013 is the same as that of the second winding 1003 . In this embodiment, the outer side of the second rotor magnetic pole set 1013 is covered with a non-magnetic sheath 1014, and the sheath 1014 is made of Inconel 718 alloy steel.

作为一个优选的实施方式,可以将第二转子101磁极组设置为一个完整的磁环,如此通过第二转子101磁极组限制第一转子101磁极组的径向位置从而可以不需要再额外设置不导磁的护套。As a preferred embodiment, the magnetic pole group of the second rotor 101 can be set as a complete magnetic ring, so that the radial position of the magnetic pole group of the first rotor 101 can be limited by the magnetic pole group of the second rotor 101 so that no additional settings are required. Magnetic sheath.

作为另一个优选的实施方式,第一转子磁极组1012以及第二转子磁极组1013所采用的永磁体可全部替换为直流励磁绕组。第一转子磁极组1012的直流励磁绕组通电时,第二转子磁极组1013的直流励磁绕组设置为开路状态。第二转子磁极组1013的直流励磁绕组通电时,第一转子磁极组1012的直流励磁绕组设置为开路状态。通过设置两套直流励磁绕组的通断状态,使转子直流励磁绕组的电流与发电机负载转矩同步变化,增强发电机转速和频率的稳定性。亦或者将第一转子磁极组1012和第二转子磁极组1013 中的任一个所采用的永磁体替换为直流励磁绕组。As another preferred implementation manner, the permanent magnets used in the first rotor pole set 1012 and the second rotor pole set 1013 can all be replaced by DC field windings. When the DC field winding of the first rotor pole set 1012 is energized, the DC field winding of the second rotor pole set 1013 is set to an open circuit state. When the DC field winding of the second rotor pole set 1013 is energized, the DC field winding of the first rotor pole set 1012 is set to an open circuit state. By setting the on-off state of two sets of DC excitation windings, the current of the rotor DC excitation windings changes synchronously with the load torque of the generator, and the stability of the generator speed and frequency is enhanced. Alternatively, the permanent magnet used in any one of the first rotor pole set 1012 and the second rotor pole set 1013 is replaced by a DC field winding.

本实施例的具有定速调频功能的发电机运行过程中,柴油机输出轴连接到转子101 的转轴,转子101旋转,第一转子磁极组1012在第一绕组1002中感应出频率为270Hz 的三相交流电压,第二转子磁极组1013在第二绕组1003中感应出频率为360Hz的三相交流电压。采用开关在第一绕组1002和第二绕组1003中切换,即实现恒定转速两级调频功能,驱动不同频率要求的负载。During the operation of the generator with constant speed and frequency modulation function in this embodiment, the output shaft of the diesel engine is connected to the rotating shaft of the rotor 101, the rotor 101 rotates, and the first rotor magnetic pole set 1012 induces a three-phase frequency of 270 Hz in the first winding 1002. AC voltage, the second rotor pole group 1013 induces a three-phase AC voltage with a frequency of 360 Hz in the second winding 1003 . A switch is used to switch between the first winding 1002 and the second winding 1003, that is, to realize the two-stage frequency modulation function of constant speed, and to drive loads with different frequency requirements.

实施例2,请结合图5至图7所示,具有定速调频功能的发电机的另一种结构包括有一个定子200和一个转子201,定子200设置在转子201内部,为外转子内定子结构。Embodiment 2, please refer to Fig. 5 to Fig. 7, another structure of the generator with constant speed and frequency modulation function includes a stator 200 and a rotor 201, the stator 200 is arranged inside the rotor 201, which is an outer rotor inner stator structure.

定子200包括定子铁心2001,以及在定子铁心2001上绕设的两组三相绕组,即第一绕组2002和第二绕组2003。定子铁心2001的外周面沿周向开设均匀分布的槽2001a,槽2001a之间形成的定子齿2001b上绕制第一绕组2002和第二绕组2003。其中第一绕组2002靠近定子铁心2001中心为内圈绕组,第二绕组2003绕制为外圈绕组。The stator 200 includes a stator core 2001 and two sets of three-phase windings wound on the stator core 2001 , that is, a first winding 2002 and a second winding 2003 . The outer peripheral surface of the stator core 2001 is provided with evenly distributed slots 2001a along the circumferential direction, and the first winding 2002 and the second winding 2003 are wound on the stator teeth 2001b formed between the slots 2001a. The first winding 2002 near the center of the stator core 2001 is an inner winding, and the second winding 2003 is an outer winding.

发电机的转子201为筒状,环绕在位于定子200外,包括护套2011,并在护套2011内侧周向布置第一转子磁极组2012和第二转子磁极组2013。转子201的转轴(图上未示出)与护套2011同轴布置并与护套2011固定,其由柴油机驱动。第一转子磁极组 2012包含8个径向充磁的永磁体,8个永磁体贴于护套2011内壁沿圆周均匀分布,第一转子磁极组2012的极数与第一绕组2002的极数相同。第二转子磁极组2013包含6 个径向充磁的永磁体,6个永磁体贴于第一转子磁极组2012的内壁沿圆周均匀分布,第二转子磁极组2013的极数与第二绕组2003的极数相同。由此在转子201受柴油机驱动转动时,在同一转速下,第一绕组2002和第二绕组2003中可以感应出不同频率的交流电压,实现恒定转速两级调频功能,驱动不同频率要求的负载。The rotor 201 of the generator is cylindrical, surrounds the stator 200 and includes a sheath 2011 , and a first rotor pole set 2012 and a second rotor pole set 2013 are circumferentially arranged inside the sheath 2011 . The rotating shaft (not shown in the figure) of the rotor 201 is arranged coaxially with the sheath 2011 and is fixed with the sheath 2011, which is driven by a diesel engine. The first rotor pole set 2012 includes 8 radially magnetized permanent magnets, and the 8 permanent magnets are attached to the inner wall of the sheath 2011 and distributed evenly along the circumference. The number of poles of the first rotor pole set 2012 is the same as that of the first winding 2002 . The second rotor pole set 2013 includes 6 radially magnetized permanent magnets, and the 6 permanent magnets are attached to the inner wall of the first rotor pole set 2012 and distributed evenly along the circumference. the same number of poles. Therefore, when the rotor 201 is rotated by the diesel engine, at the same rotational speed, AC voltages of different frequencies can be induced in the first winding 2002 and the second winding 2003, realizing the constant rotational speed two-stage frequency modulation function, and driving loads with different frequency requirements.

实施例3,请结合图8至图10所示,具有定速调频功能的发电机的又一种结构包括有一个定子300和两个转子,两个转子即第一转子301和第二转子302,定子300设置在第一转子301和第二转子302之间。Embodiment 3, please refer to FIG. 8 to FIG. 10 , another structure of the generator with constant speed and frequency modulation function includes a stator 300 and two rotors, the two rotors are the first rotor 301 and the second rotor 302 , the stator 300 is disposed between the first rotor 301 and the second rotor 302 .

定子300包括定子铁心3001,以及在定子铁心3001上绕设的两组三相绕组,即第一绕组3002和第二绕组3003。定子铁心3001的外周面和内周面都沿周向开设均匀分布的外槽3001a和内槽3001b,外槽3001a之间形成的外定子齿3001c上绕制第一绕组 3002,内槽3001b之间形成的内定子齿3001d上绕制第二绕组3003。第一转子301和第二转子302具有同一转轴(图上未示出),第一转子301和第二转子302上的磁极组围绕转轴周向布置。具体地,第一转子301是设置在定子300的外围,包括有外护套3011,在外护套3011内壁沿圆周均匀分布贴设8个径向充磁的永磁体构成第一转子磁极组 3012,其极数与第一绕组3002的极数相同。第二转子302是设置在定子300的内部,包括有转子铁心3021,在转子铁心3021的外壁沿圆周均匀分布贴设6个径向充磁的永磁体构成第二转子磁极组3022,其极数与第二绕组3003的极数相同。柴油机的驱动轴与转轴连接后同时驱动第一转子301和第二转子302转动,由此在第一绕组3002和第二绕组3003中可以感应出不同频率的交流电压,实现恒定转速两级调频功能,驱动不同频率要求的负载。The stator 300 includes a stator core 3001 and two sets of three-phase windings wound on the stator core 3001 , that is, a first winding 3002 and a second winding 3003 . The outer peripheral surface and the inner peripheral surface of the stator core 3001 are provided with outer slots 3001a and inner slots 3001b evenly distributed along the circumferential direction, and the first winding 3002 is wound on the outer stator teeth 3001c formed between the outer slots 3001a, between the inner slots 3001b The second winding 3003 is wound around the formed inner stator teeth 3001d. The first rotor 301 and the second rotor 302 have the same rotating shaft (not shown in the figure), and the magnetic pole groups on the first rotor 301 and the second rotor 302 are circumferentially arranged around the rotating shaft. Specifically, the first rotor 301 is arranged on the periphery of the stator 300, and includes an outer sheath 3011, and eight radially magnetized permanent magnets are evenly distributed along the circumference of the inner wall of the outer sheath 3011 to form the first rotor pole group 3012. The number of poles is the same as that of the first winding 3002 . The second rotor 302 is arranged inside the stator 300 and includes a rotor core 3021. On the outer wall of the rotor core 3021, six radially magnetized permanent magnets are evenly distributed along the circumference to form the second rotor pole group 3022. The number of poles is the same as that of the second winding 3003 . After the drive shaft of the diesel engine is connected to the rotating shaft, it simultaneously drives the first rotor 301 and the second rotor 302 to rotate, so that AC voltages of different frequencies can be induced in the first winding 3002 and the second winding 3003, realizing the two-stage frequency modulation function of constant speed , to drive loads with different frequency requirements.

Claims (9)

1.一种具有定速调频功能的发电机,包括定子和转子,其特征在于,所述定子包括定子铁心、第一绕组和第二绕组,所述第一绕组和所述第二绕组均绕制于所述定子铁心,所述第二绕组相比于所述第一绕组在所述定子的径向上更靠近所述转子,所述转子包括转轴以及设置在转轴周向的第一转子磁极组和第二转子磁极组,所述第二转子磁极组相比于所述第一转子磁极组在所述转子的径向上更靠近所述定子,组成所述第一转子磁极组和所述第二转子磁极组的磁体的极性在各自的圆周方向交替变化,所述第一转子磁极组与所述第二转子磁极组的极数不同,所述第一转子磁极组的极数与所述第一绕组的极数相同,所述第二转子磁极组的极数与所述第二绕组的极数相同。1. A generator with constant speed and frequency modulation function, comprising a stator and a rotor, characterized in that the stator comprises a stator core, a first winding and a second winding, and both the first winding and the second winding are wound Manufactured on the stator core, the second winding is closer to the rotor in the radial direction of the stator than the first winding, and the rotor includes a rotating shaft and a first rotor pole group arranged in the circumferential direction of the rotating shaft and a second rotor pole group, the second rotor pole group is closer to the stator in the radial direction of the rotor than the first rotor pole group, forming the first rotor pole group and the second rotor pole group The polarities of the magnets of the rotor pole groups alternately change in respective circumferential directions, the number of poles of the first rotor pole group is different from that of the second rotor pole group, and the number of poles of the first rotor pole group is different from that of the second rotor pole group. The number of poles of the first winding is the same, and the number of poles of the second rotor magnetic pole group is the same as that of the second winding. 2.根据权利要求1所述的具有定速调频功能的发电机,其特征在于,所述定子设置于所述转子的外围,所述第二转子磁极组为一整体式磁环。2 . The generator with constant speed and frequency modulation function according to claim 1 , wherein the stator is arranged on the periphery of the rotor, and the second rotor pole group is an integral magnetic ring. 3 . 3.根据权利要求1所述的具有定速调频功能的发电机,其特征在于,所述第一转子磁极组和/或所述第二转子磁极组为直流励磁绕组。3. The generator with constant speed and frequency modulation function according to claim 1, characterized in that, the first rotor pole group and/or the second rotor pole group are DC field windings. 4.根据权利要求1所述的具有定速调频功能的发电机,其特征在于,所述第一转子磁极组和所述第二转子磁极组的磁体充磁方向相同,均为径向或平行方式充磁。4. The generator with constant speed and frequency modulation function according to claim 1, characterized in that, the magnetization directions of the first rotor pole group and the second rotor pole group are the same, both are radial or parallel method of magnetization. 5.根据权利要求1所述的具有定速调频功能的发电机,其特征在于,所述第一转子磁极组和所述第二转子磁极组的磁体在周向均匀间隔布置。5. The generator with constant speed and frequency modulation function according to claim 1, characterized in that, the magnets of the first rotor pole group and the second rotor pole group are evenly spaced in the circumferential direction. 6.一种具有定速调频功能的发电机,其特征在于,包括定子、第一转子和第二转子,所述定子设置于所述第一转子和所述第二转子之间,所述定子包括定子铁心、第一绕组和第二绕组,所述第一绕组和所述第二绕组均绕制于所述定子铁心,所述第一绕组在径向上靠近所述第一转子,所述第二绕组在径向上靠近所述第二转子,所述第一转子和所述第二转子具有一共同转轴,所述第一转子设有围绕所述定子外侧周向设置的第一转子磁极组,所述第二转子设有围绕所述定子内侧周向设置的第二转子磁极组,所述第一转子磁极组与所述第二转子磁极组的极数不同,所述第一转子磁极组的极数与所述第一绕组的极数相同,所述第二转子磁极组的极数与所述第二绕组的极数相同。6. A generator with constant speed and frequency modulation function, characterized in that it comprises a stator, a first rotor and a second rotor, the stator is arranged between the first rotor and the second rotor, and the stator It includes a stator core, a first winding and a second winding, the first winding and the second winding are both wound on the stator core, the first winding is radially close to the first rotor, the first The second winding is radially close to the second rotor, the first rotor and the second rotor have a common rotating shaft, and the first rotor is provided with a first rotor pole group arranged around the outer circumference of the stator, The second rotor is provided with a second rotor pole group arranged circumferentially around the inside of the stator, the number of poles of the first rotor pole group is different from that of the second rotor pole group, and the number of poles of the first rotor pole group is The number of poles is the same as that of the first winding, and the number of poles of the second rotor magnetic pole group is the same as that of the second winding. 7.根据权利要求6所述的具有定速调频功能的发电机,其特征在于,所述第一转子磁极组和/或所述第二转子磁极组为直流励磁绕组。7. The generator with constant speed and frequency modulation function according to claim 6, characterized in that, the first rotor pole group and/or the second rotor pole group are DC field windings. 8.根据权利要求6所述的具有定速调频功能的发电机,其特征在于,所述第一转子磁极组和所述第二转子磁极组的磁体充磁方向相同,均为径向或平行方式充磁。8. The generator with constant speed and frequency modulation function according to claim 6, characterized in that the magnetization directions of the first rotor pole group and the second rotor pole group are the same, both are radial or parallel method of magnetization. 9.根据权利要求6所述的具有定速调频功能的发电机,其特征在于,所述第一转子磁极组和所述第二转子磁极组的磁体在周向均匀间隔布置。9 . The generator with constant speed and frequency modulation function according to claim 6 , wherein the magnets of the first rotor magnetic pole group and the second rotor magnetic pole group are evenly spaced in the circumferential direction.
CN202211374554.9A 2022-11-04 2022-11-04 A generator with constant speed and frequency regulation function Pending CN115622305A (en)

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