CN102848897B - A kind of Hybrid Vehicle electronic stepless speed regulation system - Google Patents

一种基于复合磁通切换永磁电机的混合动力汽车用电子无极调速系统，包括发动机、离合器、复合磁通切换永磁电机、电功率模块、电池组、主减速器、车轮和控制单元。本发明由于采用复合磁通切换永磁电机作为功率分配装置，既无行星齿轮，又无滑环、碳制电刷等机械装置，损耗低、结构简单。只采用一个电机就能实现多种模式的运行，节省空间，提高舒适度。本发明的电子无极调速系统，发动机一直工作于高效运行区域，有效地提高了整车效率。

An electronic stepless speed regulation system for hybrid electric vehicles based on a composite magnetic flux switching permanent magnet motor, including an engine, a clutch, a composite magnetic flux switching permanent magnet motor, an electric power module, a battery pack, a final reducer, wheels and a control unit. Because the present invention adopts the composite magnetic flux switching permanent magnet motor as the power distributing device, it has neither planetary gears nor mechanical devices such as slip rings and carbon brushes, and has low loss and simple structure. Multiple modes of operation can be realized by using only one motor, which saves space and improves comfort. In the electronic stepless speed regulation system of the present invention, the engine always works in the high-efficiency operation area, which effectively improves the efficiency of the whole vehicle.

一种混合动力汽车用电子无级调速系统An electronic stepless speed regulation system for hybrid electric vehicles

技术领域 technical field

本发明属于汽车动力领域，为一种输入功率分配型混合动力汽车调速装置。 The invention belongs to the field of automobile power, and relates to an input power distribution type hybrid electric vehicle speed regulating device.

背景技术 Background technique

近年来，随着全球环境恶化以及石油资源的日益短缺，传统汽车产业面临着严峻考验。因此，节能环保新能源汽车的研发已经成为世界各国政府的战略性产业和国内外专家学者关注的热点之一。作为新能源汽车的一类，混合动力汽车以其燃油经济性高、尾气排放低、续航里程长的显著优点脱颖而出，并得到了快速的发展。 In recent years, with the deterioration of the global environment and the increasing shortage of oil resources, the traditional automobile industry is facing a severe test. Therefore, the research and development of energy-saving and environmentally friendly new energy vehicles has become one of the strategic industries of governments around the world and one of the hot spots that experts and scholars at home and abroad pay attention to. As a category of new energy vehicles, hybrid vehicles stand out for their remarkable advantages of high fuel economy, low exhaust emissions, and long cruising range, and have been rapidly developed.

而有效实现混合动力汽车基本功能的关键技术之一是研发高性能的电子无级调速（electronicallycontinuouslyvariabletransmission，简称E-CVT）系统。根据是否采用机械齿轮，可将现有上市以及国内外专家学者广泛研究的E-CVT系统分为两大类：一类是采用机械齿轮（行星齿轮）的E-CVT系统，另一类为没有齿轮啮合的无齿轮E-CVT系统。带机械齿轮功率分配装置的E-CVT系统都存在一个问题，即必须采用行星齿轮来调节引擎和联接在汽车驱动轴上的电机之间的能量传送。和所有机械齿轮一样，行星齿轮存在着传输损耗和齿轮噪音的缺点，而且必须人为定期地给齿轮加润滑剂进行维护。而无机械齿轮功率分配装置的E-CVT系统，通常采用一个双转子电机来实现功率分配，即采用电气联结方式来克服上述问题。然后，这种电气联结的电子无级调速系统在克服行星齿轮缺点的同时也产生了一个新的问题：系统中所采用的双转子电机必需通过滑环和碳制电刷从转子中输入或输出电能量。而众所周知，滑环和碳制电刷将产生额外的损耗，而且需要定期维护。此外，处于最里面的内转子电机的散热问题也是制约该系统实际应用的一个主要瓶颈。因此，研发一种既不需要行星齿轮，也不需要滑环和碳制电刷，而且效率高、控制方便、运行稳定的新型E-CVT系统成为目前混合动力汽车调速领域的热点问题。 One of the key technologies to effectively realize the basic functions of hybrid electric vehicles is to develop a high-performance electronically continuously variable transmission (E-CVT) system. According to whether mechanical gears are used, the E-CVT systems currently on the market and widely researched by experts and scholars at home and abroad can be divided into two categories: one is the E-CVT system using mechanical gears (planetary gears), and the other is E-CVT systems without mechanical gears. Gear-meshing gearless E-CVT system. A problem with E-CVT systems with mechanically geared power splits is that planetary gears must be used to regulate the power transfer between the engine and the electric motor coupled to the vehicle's drive shaft. Like all mechanical gears, planetary gears have the disadvantages of transmission loss and gear noise, and must be manually lubricated for maintenance. The E-CVT system without mechanical gear power distribution device usually uses a dual-rotor motor to realize power distribution, that is, an electrical connection method is used to overcome the above problems. Then, this electrically connected electronic stepless speed regulation system also creates a new problem while overcoming the shortcomings of the planetary gear: the dual-rotor motor used in the system must be input from the rotor through slip rings and carbon brushes. output electrical energy. Slip rings and carbon brushes are known to generate additional wear and require regular maintenance. In addition, the heat dissipation of the innermost inner rotor motor is also a major bottleneck restricting the practical application of the system. Therefore, developing a new type of E-CVT system that does not require planetary gears, slip rings and carbon brushes, and has high efficiency, convenient control, and stable operation has become a hot issue in the field of hybrid electric vehicle speed control.

发明内容 Contents of the invention

技术问题：本发明是提出一种基于复合式磁通切换永磁电机的混合动力汽车用电子无极调速系统。该系统既无行星齿轮，也无滑环和碳制电刷。既解决带齿轮功率分配装置存在着传输损耗和齿轮噪音的缺点，又解决了带电刷双转子电机系统产生的额外损耗、定期维护及散热问题。 Technical problem: The present invention proposes an electronic stepless speed regulation system for hybrid electric vehicles based on a compound flux switching permanent magnet motor. The system has neither planetary gears nor slip rings and carbon brushes. It not only solves the shortcomings of transmission loss and gear noise in the power distribution device with gears, but also solves the problems of extra loss, regular maintenance and heat dissipation caused by the dual-rotor motor system with brushes.

技术方案：本发明的基于复合磁通切换永磁电机的混合动力汽车用电子无极调速系统，包括发动机、离合器、主减速器、车轮，其特征是还包括复合磁通切换永磁电机、电功率模块、电池组、控制单元；发动机通过离合器连接复合磁通切换永磁电机的内转子，电功率模块连接在复合磁通切换永磁电机的内定子与外定子之间，电池组与复合磁通切换永磁电机的内定子及电功率模块相连；复合磁通切换永磁电机的外转子经主减速器与车轮连接.；控制单元分别与发动机、电功率模块、电池组相连。 Technical solution: The electronic stepless speed regulation system for hybrid electric vehicles based on the composite magnetic flux switching permanent magnet motor of the present invention includes an engine, a clutch, a final reducer, and wheels, and is characterized in that it also includes a composite magnetic flux switching permanent magnet motor, an electric power Module, battery pack, control unit; the engine is connected to the inner rotor of the compound flux switching permanent magnet motor through the clutch, the electric power module is connected between the inner stator and the outer stator of the compound flux switching permanent magnet motor, and the battery pack and the compound flux switching The inner stator of the permanent magnet motor is connected to the electric power module; the outer rotor of the composite flux switching permanent magnet motor is connected to the wheel through the final reducer; the control unit is connected to the engine, the electric power module, and the battery pack respectively.

复合磁通切换永磁电机由内转子、内定子、外定子、外转子组成，且内定子与外定子通过隔磁环连接为一个整体。 The composite flux switching permanent magnet motor is composed of an inner rotor, an inner stator, an outer stator, and an outer rotor, and the inner stator and the outer stator are connected as a whole through a magnetic isolation ring.

电功率模块包括第一功率变换器、DC-DC变换电路、第二功率变换器，且第一功率变换器与第二功率变换器都具备双向整流、逆变功能；电池组经过电功率模块和第二功率变换器输出或存储能量。 The electric power module includes a first power converter, a DC-DC conversion circuit, and a second power converter, and both the first power converter and the second power converter have bidirectional rectification and inverter functions; the battery pack passes through the electric power module and the second power converter Power converters export or store energy.

复合磁通切换永磁电机，利用双凸极结构电机的特点，将放置永磁体与电枢绕组的定子整合，而外电机的外转子经主减速器与适合低速的车轮耦合，内电机的内转子经离合器与适合高速的发动机耦合。 The compound magnetic flux switching permanent magnet motor utilizes the characteristics of double salient pole structure motor to integrate the permanent magnet and the stator of the armature winding, while the outer rotor of the outer motor is coupled with the wheel suitable for low speed through the main reducer, and the inner motor of the inner motor The rotor is coupled with a high-speed engine through a clutch.

将汽车上三个旋转设备：发动机，E-CVT和车轮传动系统高度集成，发动机与车轮传动系统之间无直接机械连结，以实现电气联结的电子无级调速系统。 The three rotating devices on the car: the engine, E-CVT and wheel transmission system are highly integrated, and there is no direct mechanical connection between the engine and the wheel transmission system, so as to realize the electronic stepless speed regulation system of electrical connection.

在作为功率分配器工作时，发动机驱动复合磁通切换电机的内转子，通过电磁耦合作用，内定子绕组获得一个总电功率，该电功率将分为两个部分，一部分由内定子绕组经第二功率变换器将交流电整流成与电池组充电电压相匹配的直流电传输到电池组，以化学能的形式存储于电池组中；另一部分以电功率的形式经DC-DC变换电路，将直流电压调整为适合外定子绕组工作，再通过第一功率变换器逆变，将电能传递到复合磁通切换电机的外定子绕组中，通过电磁耦合，使得外转子产生机械转矩并以机械能的形式驱动车轮。上述两部分的功率流大小与方向可以根据需求，由控制单元合理分配。其总的控制策略为：（1）当由发动机的机械功率转化至复合磁通切换电机内定子的电功率超过驱动车轮所需的机械功率时，控制单元控制第一功率变换器分配能量，将一部分电功率经DC-DC变换器、第一功率变换器向外定子绕组提供电功率，再转化成车辆驱动所需的机械功率；另一部分剩余的电功率则通过第二功率变换器给电池组充电，存储多余能量；（2）当由发动机的机械功率转化至复合磁通切换电机内定子的电功率小于驱动车轮所需的机械功率时，控制单元控制第二功率变换器将全部电能经DC-DC变换器、第一功率变换器传递到外定子绕组，同时控制电池组经DC-DC变换器、第一功率变换器也向外定子绕组提供不足的电能，此时车轮行驶所需的能量由电池组与发动机两方面共同提供。除了上述两种主要工作模式外，还存在很多其他工作模式，仅通过电池组给外定子绕组供电，实现纯电动模式；在车辆下坡或者刹车时，实现机械能的能量反馈等。 When working as a power splitter, the engine drives the inner rotor of the composite magnetic flux switching motor. Through electromagnetic coupling, the inner stator winding obtains a total electric power, which will be divided into two parts, one part is generated by the inner stator winding through the second power The converter rectifies the alternating current into a direct current that matches the charging voltage of the battery pack, transmits it to the battery pack, and stores it in the battery pack in the form of chemical energy; the other part is in the form of electric power through a DC-DC conversion circuit to adjust the DC voltage to a suitable value. The outer stator winding works, and then is inverted by the first power converter, and the electric energy is transferred to the outer stator winding of the composite magnetic flux switching motor. Through electromagnetic coupling, the outer rotor generates mechanical torque and drives the wheels in the form of mechanical energy. The magnitude and direction of the power flow of the above two parts can be reasonably distributed by the control unit according to the requirements. The overall control strategy is as follows: (1) When the electrical power converted from the mechanical power of the engine to the stator of the compound flux switching motor exceeds the mechanical power required to drive the wheels, the control unit controls the first power converter to distribute energy, and a part The electric power is provided to the outer stator winding through the DC-DC converter and the first power converter, and then converted into the mechanical power required for driving the vehicle; the other part of the remaining electric power is charged to the battery pack through the second power converter to store excess power. (2) When the electrical power converted from the mechanical power of the engine to the stator in the compound magnetic flux switching motor is less than the mechanical power required to drive the wheels, the control unit controls the second power converter to transfer all the electrical energy through the DC-DC converter, The first power converter transmits to the outer stator winding, and at the same time controls the battery pack through the DC-DC converter, and the first power converter also provides insufficient electric energy to the outer stator winding. Both are provided together. In addition to the above two main working modes, there are many other working modes. Only the battery pack supplies power to the outer stator winding to realize the pure electric mode; when the vehicle goes downhill or brakes, it realizes the energy feedback of mechanical energy, etc.

有益效果: Beneficial effect:

1、本发明既无行星齿轮，又无炭制电刷、滑环等机械结构，可以使发动机一直工作在高效区域，从而显著提高整车的工作效率。 1. The present invention has neither planetary gears nor mechanical structures such as carbon brushes and slip rings, so that the engine can always work in a high-efficiency area, thereby significantly improving the working efficiency of the vehicle.

2、创造性提出了一种复合磁通切换永磁电机的设计思想，利用双凸极结构电机的特点，将放置永磁体与电枢绕组的内、外定子整合，而电机的外转子与适合低速的车轮传动系统耦合，内转子与适合高速的发动机耦合，避免了传统双转子电机中内转子难以散热从而无法实际应用的技术瓶颈。 2. Creatively proposed a design idea of a compound flux switching permanent magnet motor. Using the characteristics of a double-salient structure motor, the permanent magnets are integrated with the inner and outer stators of the armature winding, and the outer rotor of the motor is suitable for low-speed motors. The coupling of the wheel transmission system, the inner rotor is coupled with the high-speed engine, which avoids the technical bottleneck that the inner rotor in the traditional dual-rotor motor is difficult to dissipate heat and cannot be practically applied.

3、基于复合磁通切换永磁电机搭建的E-CVT系统，通过巧妙设计可以将汽车上三个旋转设备（发动机，E-CVT和车轮传统系统）高度集成，以实现电气联结的电子无级调速系统，从而具有高功率密度、高效率和安静运行的优点。不仅可以实现现有电子无级调速系统的全部功能，而且在结构、体积、性能、散热、制造工艺、实用性等方面都具有较为明显的优势，且设计方法灵活多变，可根据系统需求调整。 3. The E-CVT system based on the composite magnetic flux switching permanent magnet motor can be highly integrated with the three rotating devices (engine, E-CVT and wheel traditional system) on the car through ingenious design, so as to realize the electronic stepless electrical connection Variable speed system, which has the advantages of high power density, high efficiency and quiet operation. Not only can realize all the functions of the existing electronic stepless speed regulation system, but also has obvious advantages in structure, volume, performance, heat dissipation, manufacturing process, practicality, etc., and the design method is flexible and changeable, according to the system requirements Adjustment.

附图说明 Description of drawings

图1是本发明中所采用的复合磁通切换永磁电机的结构图，其中有内转子3、内定子4、外定子5、外转子6、隔磁铝环16。 Fig. 1 is the structural diagram of the composite magnetic flux switching permanent magnet motor adopted in the present invention, wherein there are inner rotor 3, inner stator 4, outer stator 5, outer rotor 6, magnetic isolation aluminum ring 16.

图2是本发明基于复合磁通切换永磁电机的混合动力汽车用电子无极调速系统拓扑结构框图，其中包括发动机1、离合器2、复合磁通切换永磁电机7、第一功率变换器8、DC-DC变换电路9、第二功率变换器10、电池组12、控制单元13、主减速器14、车轮15。 2 is a block diagram of the electronic stepless speed regulation system for hybrid electric vehicles based on the compound flux switching permanent magnet motor of the present invention, which includes an engine 1, a clutch 2, a compound flux switching permanent magnet motor 7, and a first power converter 8 , DC-DC conversion circuit 9, second power converter 10, battery pack 12, control unit 13, final reducer 14, wheels 15.

具体实施方式 Detailed ways

如图2，本发明包括发动机1、离合器2、复合磁通切换永磁电机7、电功率模块11、电池组12、控制单元13、主减速器14（可不需要，采用外转子直驱方式）、车轮15。发动机1通过离合器2连接复合磁通切换永磁电机7的内转子3，内定子4与第二功率变换器10相连并且与DC-DC变换电路9、第一功率变换器8、外定子5串联，外转子6经主减速器14与车轮15相连。控制单元13分别与发动机1、电功率模块11、电池组12相连。电池组12可以通过第二功率变换器10或第一功率变换器8和DC-DC变换电路9储存或输出电能。 As shown in Figure 2, the present invention includes an engine 1, a clutch 2, a composite magnetic flux switching permanent magnet motor 7, an electric power module 11, a battery pack 12, a control unit 13, a final reducer 14 (it may not be required, and the outer rotor direct drive mode is adopted), wheel 15. The engine 1 is connected to the inner rotor 3 of the composite magnetic flux switching permanent magnet motor 7 through the clutch 2, and the inner stator 4 is connected to the second power converter 10 and connected in series with the DC-DC conversion circuit 9, the first power converter 8, and the outer stator 5 , the outer rotor 6 is connected with the wheel 15 through the final reducer 14 . The control unit 13 is connected to the engine 1 , the electric power module 11 and the battery pack 12 respectively. The battery pack 12 can store or output electric energy through the second power converter 10 or the first power converter 8 and the DC-DC conversion circuit 9 .

本发明的基于复合式磁通切换永磁电机的混合动力汽车用电子无极调速系统包括：发动机、离合器、主减速器、复合式磁通切换永磁电机、电功率模块，电池组、控制单元和驱动车轮。发动机通过离合器与复合式磁通切换永磁电机的内转子连接，电功率模块、电池组在内外定子电枢绕组之间，外转子经主减速器（亦可不需要，直驱）连接驱动车轮。控制单元分别与发动机、电功率模块、电池组相连。复合式磁通切换永磁电机由内外两个独立转子和一个集成的定子组成，其中集成的定子由内定子、外定子、内外定子铁心之间的隔磁环三部分组成，且在内、外定子上都绕有多相集中式电枢绕组与切向交替充磁的永磁体。该电子无级调速系统包括两套独立的功率流：第一套功率流在发动机、内转子与内定子之间流动，为发动机的机械能传递给内转子，再经过电磁感应耦合，转化成电能输入到内定子绕组中，内定子绕组连接电池组，将电能转化成化学能存储。第二套功率流在电池组、外定子与外转子之间流动，为电池组的化学能转化成电能传递给外定子绕组，再经过电磁感应耦合，转化成机械能输入到外转子，再传递给驱动车轮。除此之外，根据不同的工况，在内定子与外定子两套绕组之间亦可通过功率变换转置实现直接电能的传递。 The electronic stepless speed regulation system for hybrid electric vehicles based on the compound flux switching permanent magnet motor of the present invention includes: engine, clutch, final reducer, compound flux switching permanent magnet motor, electric power module, battery pack, control unit and Drive the wheels. The engine is connected to the inner rotor of the compound flux switching permanent magnet motor through a clutch, the electric power module and the battery pack are between the inner and outer stator armature windings, and the outer rotor is connected to drive the wheels through the final reducer (or not, direct drive). The control unit is respectively connected with the engine, the electric power module and the battery pack. The composite flux switching permanent magnet motor consists of two independent rotors inside and outside and an integrated stator. The integrated stator consists of three parts: the inner stator, the outer stator, and the magnetic isolation ring between the inner and outer stator cores. The stators are wound with multi-phase concentrated armature windings and permanent magnets with tangential alternate magnetization. The electronic stepless speed regulation system includes two sets of independent power flow: the first set of power flow flows between the engine, the inner rotor and the inner stator, and transfers the mechanical energy of the engine to the inner rotor, and then converts it into electrical energy through electromagnetic induction coupling The input is fed into the inner stator winding, which is connected to the battery pack and converts electrical energy into chemical energy for storage. The second set of power flow flows between the battery pack, the outer stator and the outer rotor. The chemical energy of the battery pack is converted into electrical energy and transmitted to the outer stator winding. After electromagnetic induction coupling, it is converted into mechanical energy and input to the outer rotor. Drive the wheels. In addition, according to different working conditions, direct power transmission can also be realized through power conversion and transposition between the two sets of windings of the inner stator and the outer stator.

本发明的电功率模块包括：第一功率变换器、DC-DC变换电路、第二功率变换器。第一、第二功率变换器分别为一个功率可以双向流动的整流/逆变器，DC-DC变换电路为一个直流升压/降压器。第一功率变换器一侧与外定子绕组相连，另一侧经过DC-DC变换电路与电池组相连。第二功率变换器一侧与内定子绕组相连，另一侧直接与电池组相连。此外，电池组、第一功率变换器、DC-DC变换电路、第二功率变换器都与控制单元相连，实现状态的检测、数据的交换与实时传递控制信号。 The electric power module of the present invention includes: a first power converter, a DC-DC conversion circuit, and a second power converter. The first and second power converters are respectively a rectifier/inverter through which power can flow bidirectionally, and the DC-DC conversion circuit is a DC step-up/step-down converter. One side of the first power converter is connected to the outer stator winding, and the other side is connected to the battery pack through a DC-DC conversion circuit. One side of the second power converter is connected to the inner stator winding, and the other side is directly connected to the battery pack. In addition, the battery pack, the first power converter, the DC-DC conversion circuit, and the second power converter are all connected to the control unit to realize state detection, data exchange and real-time transmission of control signals.

本发明的运行模式包括： The operating modes of the present invention include:

1、冷启动模式： 1. Cold start mode:

电池组12提供能量，经过第二功率变换器10传递至内定子绕组4，内转子3旋转，离合器2结合，发动机启动。 The energy provided by the battery pack 12 is transmitted to the inner stator winding 4 through the second power converter 10, the inner rotor 3 rotates, the clutch 2 is engaged, and the engine starts.

2、纯电动模式： 2. Pure electric mode:

电池组12提供能量，经过DC-DC变换电路9、第一功率变换器8传至外定子5，外转子6经主减速器14驱动车轮15行驶。 The energy provided by the battery pack 12 is transmitted to the outer stator 5 through the DC-DC conversion circuit 9 and the first power converter 8 , and the outer rotor 6 drives the wheels 15 to travel through the final reducer 14 .

3、混合动力模式： 3. Hybrid mode:

此模式主要应用于加速、爬坡等大功率行驶的情况。电机的内定子4经由第二功率变换器10、DC-DC变换电路9、第一功率变换器8为外定子5提供能量，外转子6经主减速器14驱动车轮15。当提供的能量低于外定子5所需要的能量时，电池组12经DC-DC变换电路9、第一功率变换器8补充此能量差值。同时，在混合动力运行期间，内定子4可根据电池组12的状态（SOC）实时充电。 This mode is mainly used in high-power driving situations such as acceleration and climbing. The inner stator 4 of the motor supplies energy to the outer stator 5 through the second power converter 10 , the DC-DC conversion circuit 9 , and the first power converter 8 , and the outer rotor 6 drives the wheels 15 through the final reducer 14 . When the energy provided is lower than the energy required by the outer stator 5 , the battery pack 12 supplements the energy difference through the DC-DC conversion circuit 9 and the first power converter 8 . Meanwhile, during hybrid operation, the inner stator 4 can be charged in real time according to the state of battery pack 12 (SOC).

4、再生制动模式： 4. Regenerative braking mode:

车辆减速或制动时，车轮15经主减速器14带动外转子6，外定子5发出电能经第一功率变换器8、DC-DC变换器9给电池组12充电。车辆的动能转化为电池组12的电能。发动机1的全部功率经第二功率变换器10、向电池组12充电。 When the vehicle decelerates or brakes, the wheels 15 drive the outer rotor 6 through the final reducer 14, and the outer stator 5 generates electric energy to charge the battery pack 12 through the first power converter 8 and the DC-DC converter 9 . The kinetic energy of the vehicle is converted into electrical energy of the battery pack 12 . All the power of the engine 1 charges the battery pack 12 through the second power converter 10 .

5、驻车发电模式： 5. Parking power generation mode:

此模式主要运行于电池组12电量不足的情况。发动机1经离合器2带动内转子3，内定子4发电经第二功率变换器10给电池组12充电。 This mode mainly operates when the battery pack 12 is insufficient in power. The engine 1 drives the inner rotor 3 through the clutch 2 , and the inner stator 4 generates electricity to charge the battery pack 12 through the second power converter 10 .

6、高速巡航模式： 6. High-speed cruise mode:

内定子4提供的能量经由第二功率变换器10、DC-DC变换电路9、第一功率变换器8到外定子5，外转子6经主减速器14驱动车轮15行驶。此模式主要运行于巡航速度，若发动机1提供能量大于车轮15所需能量，可将多余能量以电能形式给电池组12充电。传递路径为：发动机1—离合器2—内转子3—内定子4—第二功率变换器10—电池组12. The energy provided by the inner stator 4 passes through the second power converter 10 , the DC-DC conversion circuit 9 , and the first power converter 8 to the outer stator 5 , and the outer rotor 6 drives the wheels 15 to travel through the final reducer 14 . This mode mainly operates at cruising speed. If the energy provided by the engine 1 is greater than the energy required by the wheels 15, the excess energy can be charged to the battery pack 12 in the form of electric energy. The transmission path is: engine 1—clutch 2—inner rotor 3—inner stator 4—second power converter 10—battery pack 12.

本发明采用复合磁通切换永磁电机作为功率分配装置，优点体现在：（1）只用一个复合电机就能实现多种功能的运行方式，结构简单，占用空间小。（2）电池组可以根据实际情况吸收多余的发动机能量或补充发动机能量的不足，并且发动机一直工作在高效区域，整车的运行效率提高。 The present invention adopts the composite magnetic flux switching permanent magnet motor as the power distribution device, and the advantages are reflected in: (1) only one composite motor can realize the operation mode of multiple functions, the structure is simple, and the occupied space is small. (2) The battery pack can absorb excess engine energy or supplement the lack of engine energy according to the actual situation, and the engine always works in the high-efficiency area, improving the operating efficiency of the vehicle.

1. a Hybrid Vehicle electronic stepless speed regulation system, comprise driving engine (1), power-transfer clutch (2), main reduction gear (14), wheel (15), it is characterized in that also comprising compound flux switch permanent magnet motor (7), electric power module (11), battery pack (12), control unit (13); Driving engine (1) connects the internal rotor (3) of compound flux switch permanent magnet motor (7) by power-transfer clutch (2), electric power module (11) is connected between the internal stator (4) of compound flux switch permanent magnet motor (7) and external stator (5), and internal stator (4) and the electric power module (11) of battery pack (12) and compound flux switch permanent magnet motor (7) are connected; The outer rotor (6) of compound flux switch permanent magnet motor (7) is connected with wheel (15) through main reduction gear (14); Control unit (13) is connected with driving engine (1), electric power module (11), battery pack (12) respectively;

Compound flux switch permanent magnet motor (7) is made up of internal rotor (3), internal stator (4), external stator (5), outer rotor (6), and internal stator (4) is connected as a whole with external stator (5) by magnetism-isolating loop;

Electric power module (11) comprises the first power inverter (8), DC-DC conversion circuit (9), the second power inverter (10), and the first power inverter (8) and the second power inverter (9) all possess biphase rectification, invert function; Battery pack (12) exports or stored energy through electric power module (11).