CN103023206A - Five-phase fault-tolerant permanent magnet planetary gear motor for hybrid electric vehicle and operation method of five-phase fault-tolerant permanent magnet planetary gear motor - Google Patents
Five-phase fault-tolerant permanent magnet planetary gear motor for hybrid electric vehicle and operation method of five-phase fault-tolerant permanent magnet planetary gear motor Download PDFInfo
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Abstract
本发明公开一种混合动力汽车用五相容错式永磁行星齿轮电机及工作方法,定子内依次套有同轴的永磁齿圈、永磁太阳齿轮,永磁齿圈内、外表面上均贴有几对永磁体,永磁齿圈内表面和永磁太阳齿轮外表面之间是4个沿圆周方向均布的相同的永磁行星齿轮,每个永磁行星齿轮外表面上紧密贴有永磁体,永磁行星齿轮连接行星架;永磁太阳齿轮外表面上贴有几对紧密排列的永磁体;所有的永磁体沿各自所在的圆的径向充磁,且相邻两个永磁体是按N、S、N、S顺序排列;将高功率密度的多相容错式永磁无刷电机与高转矩密度的永磁式行星齿轮相融合,空间利用率、传动效率及转矩密度都很高。
The invention discloses a five-phase fault-tolerant permanent magnet planetary gear motor for a hybrid electric vehicle and its working method. A coaxial permanent magnet ring gear and a permanent magnet sun gear are sequentially sleeved in the stator, and the inner and outer surfaces of the permanent magnet ring gear are both There are several pairs of permanent magnets attached, and between the inner surface of the permanent magnet ring gear and the outer surface of the permanent magnet sun gear are four identical permanent magnet planetary gears that are evenly distributed along the circumference, and each permanent magnet planetary gear is closely attached to the outer surface of the permanent magnet planetary gear. Permanent magnet, the permanent magnet planetary gear is connected to the planet carrier; there are several pairs of closely arranged permanent magnets attached to the outer surface of the permanent magnet sun gear; all the permanent magnets are magnetized along the radial direction of their respective circles, and two permanent magnets are adjacent It is arranged in the order of N, S, N, S; the combination of high power density multi-phase fault-tolerant permanent magnet brushless motor and high torque density permanent magnet planetary gear, space utilization, transmission efficiency and torque density Both are very high.
Description
技术领域 technical field
本发明属于无刷电机制造技术领域,特指一种适合于需要高效率、高可靠性的中/重度混合动力机车场合的五相容错式永磁电机。 The invention belongs to the technical field of brushless motor manufacturing, in particular to a five-phase fault-tolerant permanent magnet motor suitable for medium/severe hybrid locomotives requiring high efficiency and high reliability.
背景技术 Background technique
目前,混合动力汽车以其燃油经济性高和排放少等特点受到重视。基于起动/发电模式的轻度混合动力汽车节能减排效果有限,所以,中/重度混合动力汽车就成为了该领域的发展方向。已有的混合动力合成系统在动力合成模式上分为两大类,一类是机械式混合动力合成系统。在该系统中,一般将机械行星齿轮系作为混合动力耦合装置,能够方便、高效地将发动机和电机两种动力源进行动力合成和能量传输。但机械行星齿轮作为一种接触式动力合成系统,在高速啮合时需要专门的油路润滑和冷却,汽车在不同运行工况下载荷的变化会对齿轮产生较大的啮合冲力,这对行星齿轮的硬度、刚度以及耐磨性都有更高的要求。并且,该系统的集成度较低,占据空间大且容易造成部件损坏。另一类是电磁式混合动力合成系统,利用双转子电机实现两种不同动力源的合成和无级变速,在该系统中,由中间转子和内转子构成的内层电机由于受空间的限制,一般体积较小、难以实现大功率的动力合成和转矩传递,使得该类电磁式混合动力系统在混合动力公交车、重型运输车等大功率场合的应用受到限制。并且,该系统所必须的电刷或集电环大大降低了传递效率。 At present, hybrid vehicles are valued for their high fuel economy and low emissions. Mild hybrid electric vehicles based on starting/generating mode have limited energy-saving and emission reduction effects, so medium/severe hybrid electric vehicles have become the development direction in this field. Existing hybrid power synthesis systems are divided into two categories in terms of power synthesis modes, one is mechanical hybrid power synthesis systems. In this system, the mechanical planetary gear train is generally used as a hybrid coupling device, which can conveniently and efficiently combine the two power sources of the engine and the motor for power synthesis and energy transmission. However, as a contact power synthesis system, mechanical planetary gears require special oil circuit lubrication and cooling during high-speed meshing. The change of load under different operating conditions of the car will generate a large meshing force on the gears. There are higher requirements for hardness, stiffness and wear resistance. Moreover, the system has a low level of integration, occupies a large space and is prone to component damage. The other type is the electromagnetic hybrid synthesis system, which utilizes a dual-rotor motor to realize the synthesis and stepless speed change of two different power sources. In this system, the inner motor composed of the intermediate rotor and the inner rotor is restricted by space. Generally, it is small in size and difficult to achieve high-power power synthesis and torque transmission, which limits the application of this type of electromagnetic hybrid power system in high-power occasions such as hybrid buses and heavy-duty transport vehicles. Also, the brushes or slip rings necessary for this system greatly reduce the transfer efficiency.
随着永磁材料性能的不断提高,永磁齿轮传动技术得到了新的发展,研究表明:永磁齿轮在变速比、转矩传递密度(接近100kNm/m^3)、转矩传递效率(>96%)等方面已与机械齿轮性能接近,远大于水冷条件下的无刷直流电机的转矩密度(约30 kNm/m^3)。但该类永磁齿轮结构上内、外转子转速比固定,调磁铁心层静止不动,无法实现不同速度下两种动力源的合成和分配,难以直接应用于混合动力汽车领域。 With the continuous improvement of the performance of permanent magnet materials, permanent magnet gear transmission technology has been newly developed. Research shows that: 96%) and other aspects are close to the performance of mechanical gears, far greater than the torque density of brushless DC motors under water-cooled conditions (about 30 kNm/m^3). However, the speed ratio of the inner and outer rotors of this type of permanent magnet gear structure is fixed, and the magnet core layer is stationary, so it is impossible to realize the synthesis and distribution of the two power sources at different speeds, and it is difficult to be directly applied to the field of hybrid electric vehicles.
容错永磁电机是将开关磁阻电机与永磁同步电机相结合,将传统的永磁同步电机分布绕组改为集中绕组,且每个定子槽中只有一套绕组,把没有绕组的电枢齿作为磁通回路,同时也起着相间隔离的作用。集中绕组永磁容错电机相与相之间实现了电路、磁路和温度的隔离,大大提高了电机的可靠性和容错能力。 Fault-tolerant permanent magnet motor is a combination of switched reluctance motor and permanent magnet synchronous motor, changing the traditional distributed winding of permanent magnet synchronous motor into concentrated winding, and there is only one set of winding in each stator slot, and the armature teeth without winding As a magnetic flux circuit, it also plays the role of phase isolation. The phases of the concentrated winding permanent magnet fault-tolerant motor realize the isolation of the circuit, magnetic circuit and temperature, which greatly improves the reliability and fault tolerance of the motor.
发明内容 Contents of the invention
本发明的目的是克服已有混合动力系统的缺点,提供一种具有高转矩密度、高效率、高可靠性、适合于中/重度混合动力汽车场合的容错式永磁行星齿轮电机及该电机的工作方法。 The purpose of the present invention is to overcome the shortcomings of the existing hybrid power system, to provide a fault-tolerant permanent magnet planetary gear motor and the motor with high torque density, high efficiency, high reliability, suitable for medium/severe hybrid electric vehicle occasions working method.
本发明混合动力汽车用五相容错式永磁行星齿轮电机采用的技术方案是:电机最外圈是定子,每个定子槽中有一相电枢绕组,每两相电枢绕组之间有一个容错齿,径向相对的两套电枢绕组串联构成一相,定子内依次套有同轴的永磁齿圈、永磁太阳齿轮,永磁齿圈内、外表面上均贴有几对永磁体,内、外表面上相对应的两块永磁体的中心线位于径向上且两个中心线相重合,内表面上的永磁体紧密排列,外表面上的相邻两个永磁体之间留有空隙,永磁齿圈外表面上的永磁体和定子之间留有气隙;永磁齿圈内表面和永磁太阳齿轮外表面之间是4个沿圆周方向均布的相同的永磁行星齿轮,每个永磁行星齿轮外表面上紧密贴有永磁体,永磁行星齿轮连接行星架;永磁行星齿轮外表面上的永磁体与永磁齿圈内表面上的永磁体之间留有气隙;永磁太阳齿轮外表面上贴有几对紧密排列的永磁体,永磁太阳齿轮外表面上的永磁体和永磁行星齿轮外表面上的永磁体之间留有气隙;所有的永磁体沿各自所在的圆的径向充磁,且相邻两个永磁体是按N、S、N、S顺序排列;在初始位置,在径向上,永磁太阳轮和永磁行星轮之间最靠近的两块永磁体极性相反,永磁行星轮与永磁齿圈之间最靠近的两块永磁体极性相同,永磁齿圈内外两层相对应的两块永磁体极性相同。 The technical solution adopted by the five-phase fault-tolerant permanent magnet planetary gear motor for hybrid vehicles in the present invention is: the outermost ring of the motor is a stator, and there is a phase armature winding in each stator slot, and there is a fault-tolerant phase between each two-phase armature winding. Two sets of radially opposite armature windings are connected in series to form a phase. The coaxial permanent magnet ring gear and permanent magnet sun gear are set in the stator in turn. Several pairs of permanent magnets are attached to the inner and outer surfaces of the permanent magnet ring gear. , the centerlines of the corresponding two permanent magnets on the inner and outer surfaces are located in the radial direction and the two centerlines coincide, the permanent magnets on the inner surface are closely arranged, and there is a space between two adjacent permanent magnets on the outer surface Gap, there is an air gap between the permanent magnet on the outer surface of the permanent magnet ring gear and the stator; between the inner surface of the permanent magnet ring gear and the outer surface of the permanent magnet sun gear are 4 identical permanent magnet planets evenly distributed along the circumferential direction Gears, permanent magnets are closely attached to the outer surface of each permanent magnet planetary gear, and the permanent magnet planetary gears are connected to the planet carrier; there is a gap between the permanent magnets on the outer surface of the permanent magnet planetary gear and the permanent magnets on the inner surface of the permanent magnet ring gear Air gap; there are several pairs of closely arranged permanent magnets attached to the outer surface of the permanent magnet sun gear, and there is an air gap between the permanent magnets on the outer surface of the permanent magnet sun gear and the permanent magnets on the outer surface of the permanent magnet planetary gear; all The permanent magnets are magnetized along the radial direction of their respective circles, and the two adjacent permanent magnets are arranged in the order of N, S, N, S; at the initial position, in the radial direction, between the permanent magnet sun gear and the permanent magnet planetary gear The polarities of the two closest permanent magnets between the permanent magnet planetary gear and the permanent magnet ring gear are the same, and the polarities of the two permanent magnets corresponding to the inner and outer layers of the permanent magnet ring gear are the same. same.
本发明混合动力汽车用五相容错式永磁行星齿轮电机的工作方法的技术方案是采用如下步骤: The technical scheme of the working method of the five-phase fault-tolerant permanent magnet planetary gear motor for hybrid vehicles of the present invention adopts the following steps:
A、将行星架的输出端口固定连接于混合动力汽车的驱动轴,将永磁太阳齿轮通过机械离合器和发动机相连,电池组通过一个整流逆变器连接启动发电一体机,通过另一个整流逆变器连接电枢绕组,将启动发电一体机连接发动机的输出轴; A. Fixedly connect the output port of the planet carrier to the drive shaft of the hybrid vehicle, connect the permanent magnet sun gear to the engine through a mechanical clutch, connect the battery pack to start the power generation integrated machine through a rectifier inverter, and use another rectifier inverter Connect the generator to the armature winding, and connect the starter generator to the output shaft of the engine;
B、混合动力汽车在纯电动启动、低速巡航时,关闭发动机,断开机械离合器,固定永磁太阳轮,电池组通过整流逆变器对放电,永磁齿圈旋转,永磁行星轮自转且公转,永磁行星轮通过行星架把电功率转化为机械功率传输给混合动力汽车的驱动轴; B. When the hybrid car starts purely electric and cruises at low speed, the engine is turned off, the mechanical clutch is disconnected, the permanent magnet sun gear is fixed, the battery pack is discharged through the rectifier inverter, the permanent magnet ring gear rotates, and the permanent magnet planetary gear rotates and Revolution, the permanent magnet planetary gear converts electrical power into mechanical power through the planet carrier and transmits it to the drive shaft of the hybrid vehicle;
C、混合动力汽车在高速巡航时,固定永磁齿圈,闭合机械离合器,发动机带动永磁太阳轮旋转,永磁行星轮及行星架旋转,把能量传输给驱动轴;同时发动机向电池组充电; C. When the hybrid car is cruising at high speed, the permanent magnet ring gear is fixed, the mechanical clutch is closed, the engine drives the permanent magnet sun gear to rotate, the permanent magnet planetary gear and the planet carrier rotate, and the energy is transmitted to the drive shaft; at the same time, the engine charges the battery pack ;
D、混合动力汽车在爬坡、重载、加速时,当所需负载转矩大于永磁太阳轮的最大拖动转矩时,发动机拖动永磁太阳轮旋转的同时,电池组对电枢绕组放电,永磁齿圈转动,永磁齿圈和永磁太阳轮一起带动永磁行星轮转动,通过行星架把电功率和机械功率传输给驱动轴; D. When the hybrid vehicle is climbing, heavy-loading, and accelerating, when the required load torque is greater than the maximum drag torque of the permanent magnet sun gear, the engine will drive the permanent magnet sun gear to rotate, and the battery pack will rotate the armature. The winding discharges, the permanent magnet ring gear rotates, the permanent magnet ring gear and the permanent magnet sun gear together drive the permanent magnet planetary gear to rotate, and the electric power and mechanical power are transmitted to the drive shaft through the planet carrier;
E、混合动力汽车在减速、制动时,关闭发动机,断开机械离合器,固定永磁太阳轮,永磁行星轮带动永磁齿圈旋转,通过电枢绕组对电池组充电。 E. When the hybrid vehicle is decelerating or braking, the engine is turned off, the mechanical clutch is disconnected, the permanent magnet sun gear is fixed, the permanent magnet planetary gear drives the permanent magnet ring gear to rotate, and the battery pack is charged through the armature winding.
本发明的有益效果是: The beneficial effects of the present invention are:
1、本发明引入了非接触式永磁齿轮传动理论,将高功率密度的多相容错式永磁无刷电机与高转矩密度的永磁式行星齿轮相融合,形成了一类全新的双机械端口电机,有效克服了双转子电机受空间限制、存在集电环、电刷的不足,空间利用率、传动效率以及转矩密度都很高; 1. The invention introduces the theory of non-contact permanent magnet gear transmission, and combines the high power density multiphase fault-tolerant permanent magnet brushless motor with the high torque density permanent magnet planetary gear to form a new type of dual gear. The mechanical port motor effectively overcomes the space limitation of the dual-rotor motor, the shortcomings of the collector ring and the brush, and the space utilization rate, transmission efficiency and torque density are all high;
2、本发明采用永磁式行星齿轮,在继承机械式行星齿轮动力合成优点的同时,实现了非接触式的能量传输,有效降低了运行噪声和振动,且不需采用专门的油路进行冷却和润滑,增强了系统的耐久性和可靠性。 2. The present invention adopts the permanent magnet planetary gear, which realizes non-contact energy transmission while inheriting the power synthesis advantages of the mechanical planetary gear, effectively reduces the operating noise and vibration, and does not need to use a special oil circuit for cooling and lubrication, enhancing the durability and reliability of the system.
3、本发明由定子、电枢绕组、永磁齿圈构成的外电机运行时,通过永磁齿圈和永磁行星齿轮间磁力作用,把外电机的电能转化为磁能再转化为机械能由行星架向外传输;发动机带动永磁太阳轮工作时,通过永磁太阳轮和永磁行星齿轮间磁力作用,把机械能转化为磁能再转化为机械能由行星架向外传输。通过发动机和外层的永磁电机共同作用,可实现机械功率流与电功率流的合成和能量传输。通过控制两种功率流的比例,再加上离合-制动系统的配合,能使混合动力汽车在启动、重载、爬坡、加速、刹车以及高速巡航等不同运行工况下发动机始终运行于最佳燃油经济区,实现整车的效率最高和排放最少。 3. When the outer motor composed of stator, armature winding and permanent magnet ring gear of the present invention is in operation, through the magnetic force between the permanent magnet ring gear and the permanent magnet planetary gear, the electric energy of the outer motor is converted into magnetic energy and then converted into mechanical energy by the planet When the engine drives the permanent magnet sun gear to work, through the magnetic force between the permanent magnet sun gear and the permanent magnet planetary gear, the mechanical energy is converted into magnetic energy and then converted into mechanical energy, which is transmitted outward by the planet carrier. Through the joint action of the engine and the permanent magnet motor on the outer layer, the synthesis and energy transmission of mechanical power flow and electric power flow can be realized. By controlling the ratio of the two power flows, coupled with the cooperation of the clutch-brake system, the engine can always run at the optimal position of the hybrid vehicle under different operating conditions such as starting, heavy load, climbing, acceleration, braking and high-speed cruising. The best fuel economy zone to achieve the highest efficiency and the least emissions of the vehicle.
4、本发明融入了永磁容错电机的特点,每个定子槽中只有一套绕组,没有绕组的容错齿作为磁通回路,同时也起着相间的电路和温度的隔离作用。电机的某一相绕组发生短路故障时,其短路电流将导致温度急剧上升,由于有容错齿的存在,不会引起其他相绕组的温升,从而实现了更好的独立性,提高了电机的可靠性和带故障运行能力。 4. The present invention incorporates the characteristics of permanent magnet fault-tolerant motors. There is only one set of windings in each stator slot, and the fault-tolerant teeth without windings are used as magnetic flux circuits, and at the same time, they also play the role of isolation between phase circuits and temperature. When a short-circuit fault occurs in a certain phase winding of the motor, its short-circuit current will cause a sharp rise in temperature. Due to the existence of fault-tolerant teeth, it will not cause temperature rise in other phase windings, thereby achieving better independence and improving the motor. Reliability and ability to operate with failures.
5、本发明的外电机反电势波形为正弦波,绕组可以通入正弦交流电,空间矢量控制可以有效的应用于该电机,这也使基于矢量控制的容错智能控制策略的应用成为了可能。 5. The back EMF waveform of the external motor of the present invention is a sine wave, the winding can be fed with a sinusoidal alternating current, and the space vector control can be effectively applied to the motor, which also makes it possible to apply a fault-tolerant intelligent control strategy based on vector control.
附图说明 Description of drawings
图1是本发明混合动力汽车用五相容错式永磁行星齿轮电机结构的截面图; Fig. 1 is the cross-sectional view of the structure of the five-phase fault-tolerant permanent magnet planetary gear motor for hybrid vehicles of the present invention;
图2是图1中混合动力汽车用五相容错式永磁行星齿轮电机工作时的连接图; Fig. 2 is the connection diagram when the five-phase fault-tolerant permanent magnet planetary gear motor is used for the hybrid electric vehicle in Fig. 1;
图3是本发明电机中永磁齿圈和永磁太阳轮的矩角特性曲线; Fig. 3 is the moment-angle characteristic curve of permanent magnet ring gear and permanent magnet sun gear in the motor of the present invention;
图4是本发明电机的电感曲线; Fig. 4 is the inductance curve of motor of the present invention;
图5是本发明电机的转矩输出波形。 Fig. 5 is the torque output waveform of the motor of the present invention.
图中有:1.定子;2.电枢绕组;3.永磁齿圈;4.永磁行星齿轮;5.永磁太阳齿轮;6.钕铁硼永磁体;7.容错齿;8.行星架;9.双转子电机的内转子;10.双转子电机的中间转子;11.发动机;12.启动发电一体机;13.整流逆变器;14.电池组;15.驱动轴;16.机械离合器;17.永磁齿圈相对永磁行星轮转过不同角度时的转矩输出曲线;18.永磁太阳轮相对永磁行星轮转过不同角度时的转矩输出曲线;19.本发明电机通入额定电流时的自感曲线;20.本发明电机通入额定电流时相邻绕组的互感曲线;21.本发明电机通入额定电流,正常工作时的输出转矩;22.本发明电机通入额定电流,一相短路时电机的输出转矩。 In the figure: 1. Stator; 2. Armature winding; 3. Permanent magnet ring gear; 4. Permanent magnet planetary gear; 5. Permanent magnet sun gear; 6. NdFeB permanent magnet; 7. Fault-tolerant teeth; 8. Planetary frame; 9. Inner rotor of dual rotor motor; 10. Intermediate rotor of dual rotor motor; 11. Engine; 12. Starter generator; 13. Rectifier inverter; 14. Battery pack; 15. Drive shaft; 16 .Mechanical clutch; 17. The torque output curve when the permanent magnet ring gear rotates through different angles relative to the permanent magnet planetary gear; 18. The torque output curve when the permanent magnet sun gear rotates through different angles relative to the permanent magnet planetary gear; 19. The present invention The self-inductance curve when the motor is fed with the rated current; 20. The mutual inductance curve of the adjacent windings when the motor of the present invention is fed with the rated current; 21. The motor of the present invention is fed with the rated current and the output torque during normal operation; 22. The present invention The output torque of the motor when the motor is fed with rated current and one phase is short-circuited.
具体实施方式 Detailed ways
本发明是将高转矩密度的非接触式永磁齿轮传动理论与高性能的永磁驱动电机相结合,又采用高容错性的绕组连接方式,使电机能以高转矩密度、高功率、高可靠性的状态对整个混合动力系统的机械功率流和电功率流进行调配,确保整个机车的低排放和高效率运行。 The present invention combines the theory of non-contact permanent magnet gear transmission with high torque density and high performance permanent magnet drive motor, and adopts a highly fault-tolerant winding connection method, so that the motor can achieve high torque density, high power, The state of high reliability allocates the mechanical power flow and electric power flow of the whole hybrid system to ensure the low emission and high efficiency operation of the whole locomotive.
参见图1中本发明混合动力汽车用五相容错式永磁行星齿轮电机,电机最外圈是定子1,定子1内依次套有同轴的永磁齿圈3、永磁太阳齿轮5。定子1由0.35mm的硅钢片叠压而成。定子槽数为20,每槽中只有一相电枢绕组2,每两相电枢绕组2之间有一个容错齿7,容错齿7上无绕组且极弧很小。电枢绕组2采用五相容错式接法,采用集中绕组,径向相对的两套电枢绕组2串联构成一相。永磁齿圈3内、外表面上均贴有18对钕铁硼永磁体6,内、外表面上相对应的两块永磁体6的中心线位于径向上,并且两个中心线相互重合,内表面上的永磁体6紧密排列,外表面上的相邻两个永磁体6之间留有空隙。永磁齿圈3外表面上贴有的永磁体6和定子1之间留有1mm气隙。
Referring to the five-phase fault-tolerant permanent magnet planetary gear motor for hybrid vehicles of the present invention in Fig. 1, the outermost ring of the motor is a
在永磁齿圈3内表面和永磁太阳齿轮5外表面之间是大小和材料完全相同的4个永磁行星齿轮4,4个永磁行星齿轮4沿圆周方向均布。永磁行星齿轮4也由硅钢片叠压而成。在每个永磁行星齿轮4外表面上紧密排列永磁体,永磁行星齿轮4通过轴承连接行星架8,行星架8是电机的动力输出端口。永磁行星齿轮4外表面上的永磁体与永磁齿圈3内表面上贴有的永磁体之间留有1mm气隙。
Between the inner surface of the permanent
永磁太阳齿轮5外表面上贴有10对紧密排列的永磁体,永磁太阳齿轮5由硅钢片叠压而成。永磁太阳齿轮5外表面上贴有的永磁体和永磁行星齿轮4外表面上的永磁体之间留有1mm气隙。永磁太阳齿轮5是电机的机械功率输入端口。
The outer surface of the permanent
所有的永磁体沿各自所在的圆的径向充磁,即沿半径向圆外(设为N)或向圆内(设为S)充磁,且相邻两个永磁体是按N、S、N、S顺序排列。 All permanent magnets are magnetized along the radial direction of their respective circles, that is, they are magnetized outside the circle (set as N) or inward (set as S) along the radius, and two adjacent permanent magnets are magnetized according to N and S , N, S order.
在初始位置,永磁太阳轮5和永磁行星轮4之间,在径向上最靠近的两块永磁体极性相反;永磁行星轮4与永磁齿圈3之间,在径向最靠近的永磁体极性相同;永磁齿圈3内外两层相对应的永磁体极性相同,总之,要保证所有永磁齿轮是相互吸引的。
In the initial position, between the permanent
永磁齿圈3极对数 =18,永磁太阳轮5极对数=10,永磁行星轮4极对数=4,满足关系式:。永磁齿圈3半径、永磁太阳齿轮5半径、永磁行星齿轮4半径满足关系式:。
3 pole pairs of permanent magnet ring gear =18, 5 pole pairs of permanent magnet sun gear =10, 4 pole pairs of permanent magnet planetary gear =4, satisfy the relation: . Permanent
以一台额定功率=10kw,额定转速=1000rpm的五相容错式永磁行星齿轮电机为例,主要设计数据有:额定相电流峰值为50A,定子1的外直径为280mm,定子1的内直径为209mm,硅钢片叠片长为60mm,定子极弧为10.8°,每相电枢绕组为120匝,永磁齿圈3的外层永磁体的极弧为7°,永磁行星齿轮4的半径为19.5mm,永磁太阳齿轮5的半径为49.5mm,各个轮子间气隙厚度为1mm,所有永磁体的厚度为3mm。
with a rated power =10kw, rated speed =1000rpm five-phase fault-tolerant permanent magnet planetary gear motor as an example, the main design data are: the peak value of the rated phase current is 50A, the outer diameter of the
参见图2,本发明五相容错式永磁行星齿轮电机在使用时,将行星架8的输出端口固定连接于混合动力汽车的驱动轴15,将永磁太阳齿轮5通过机械离合器16和混合动力汽车的发动机11相连。电池组14通过一个整流逆变器13连接启动发电一体机(ISG)12,通过另一个整流逆变器13连接电枢绕组2。启动发电一体机12连接发动机11的输出轴。
Referring to Fig. 2, when the five-phase fault-tolerant permanent magnet planetary gear motor of the present invention is in use, the output port of the
下面简述混合动力汽车在不同工况下,本发明五相容错式永磁行星齿轮电机的工作过程: The following briefly describes the working process of the five-phase fault-tolerant permanent magnet planetary gear motor of the present invention under different working conditions of the hybrid electric vehicle:
混合动力汽车的纯电动启动、低速巡航过程:当电池组14电量充足时,混合动力汽车的启动和低速巡航过程可工作在纯电动状态。关闭发动机11,断开机械离合器16,固定永磁太阳轮5,电池组14通过整流逆变器13对电机放电,永磁齿圈3旋转,通过永磁齿圈3和永磁行星轮4上的永磁体间的磁力带动永磁行星轮4自转且公转,由永磁行星轮4通过行星架8把电功率转化为机械功率传输给混合动力汽车的驱动轴15。
Pure electric starting and low-speed cruising process of the hybrid electric vehicle: when the
混合动力汽车的高速巡航过程:当混合动力汽车处于高速运行时,发动机11的燃油效率较高,可由发动机11单独驱动。固定永磁齿圈3,闭合机械离合器16。一方面,发动机11带动永磁太阳轮5旋转,进而带动永磁行星轮4及行星架8旋转,把能量传输给驱动轴15;另一方面,发动机11通过启动发电一体机12向电池组14充电,进一步提高燃料的利用效率。
The high-speed cruising process of the hybrid vehicle: when the hybrid vehicle is running at high speed, the fuel efficiency of the
混合动力汽车的爬坡、重载、加速过程:当所需负载转矩大于永磁太阳轮5的最大拖动转矩时,发动机11拖动永磁太阳轮5旋转的同时,电池组14对电枢绕组2放电,驱动永磁齿圈3转动,永磁齿圈3和永磁太阳轮5一起带动永磁行星轮4转动,进而通过行星架8把电功率和机械功率传输给混合动力汽车的驱动轴15。
The climbing, heavy load, and acceleration process of hybrid electric vehicles: when the required load torque is greater than the maximum drag torque of the permanent
混合动力汽车减速、制动过程:关闭发动机11,机械离合器16断开,永磁太阳轮5固定。永磁行星轮4带动永磁齿圈3旋转,电机工作在发电状态,通过电枢绕组2对电池组14充电,把机车的机械能转化为电能储存起来。
The deceleration and braking process of the hybrid electric vehicle: the
当本发明电机向外传输动力的时候,永磁行星轮4通过轴承自转同时带动行星架8公转。由附图3可知,永磁太阳轮5和永磁齿圈3围绕静止的永磁行星轮4转动时,输出转矩的大小呈近似正弦曲线变化,所以,当负载转矩大于轮子当时所处位置的拖动转矩时,永磁太阳轮5与永磁行星轮4或者永磁齿圈3与永磁行星轮4之间就会错开一定的角度,保证轮子的拖动转矩大于或等于负载转矩。当负载转矩比轮子最大位置时的拖动转矩还要大时,永磁行星轮4与主动轮之间就会发生打滑现象,可以有效地防止电机过热损坏的现象。附图4为本发明电机通入额定电流时的相电感波形,从图4中可以看出,相间的互感约为自感的1/10,说明本发明电机的磁路隔离效果很好,当一相发生故障时,不会对其他相造成影响。图5为本发明电机通入额定电流时的输出转矩,从图5中可以看出,当一相短路时,本发明电机的输出转矩仍然较好,说明本发明电机具有较强的容错能力。
When the motor of the present invention transmits power to the outside, the permanent magnet
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