With the development of high-power electric drive technologies such as electric vehicles, magnetic levitation trains, and ship electric power promotion, people are increasingly demanding low-speed, high-torque density, direct-drive motors in order to reduce the size, weight, and raw materials of electric motors. Consumption, improve material utilization. However, for the conventional structure of the motor, since the teeth flowing through the magnetic flux and the armature winding flowing through the current occupy the same cross section, there is a conflict between the increase of the air gap magnetic flux and the increase of the winding current density, ie, the magnetic flux and the current density. The product has a certain limit, it is difficult to obtain a fundamental increase in output torque. Transverse magnetic field motors theoretically solve this problem. TFM) is a new type of motor structure proposed by Professor H. Weh, a famous motor specialist in Germany in the late 1980s. 113. Unlike the conventional motor magnetic circuit structure, the main magnetic circuit of TFM is perpendicular to the direction of motor movement, achieving magnetic induction. The decoupling of the circuit and circuit structure can be adjusted according to the magnetic circuit size and coil window to adjust the magnetic flux and current density to obtain higher torque density. After Germany took the lead in completing the first 45kW TFPM prototype in 1988, it again funded and researched the TFPM motor as one of the optimal components for future electric vehicle development (OKOFEH) in 1999; In 1997, the first 3.0MW Hengda Power Electronic Science and Education Development Fund (504925) was successfully developed for the ship's electric propulsion; the United States General Motors began to develop a 30kW transverse magnetic field permanent magnet motor for electric vehicles in 1999. In addition, the transverse magnetic field motor is also developing in the low-speed direct drive and servo field of medium and low power. At the same time, the transverse magnetic field motor also has a great reference for the linear drive and magnetic levitation technology, so it has a high theoretical research and application value. At present, the transverse magnetic field motor has a variety of topological structure forms, which can be roughly divided into three types: a polymagnetic type, a flat type, and a switched reluctance type. Among them, a concentrated magnetic type has the highest torque density. It is a schematic structural diagram of a typical structure of a transverse magnetic field permanent magnet motor. The stator of the TFPM motor adopts a combined stator structure in which the stator core is composed of an outer stator core, an inner stator core and a stator transition core. The inner and outer stator cores are placed parallel to the rotation axis and are staggered by half a pole. From the distance, the transition core is placed in a ring and the axis of rotation, and is connected with two stator cores inside and outside to form a closed magnetic circuit. Several pairs of such unit cores are placed along the circumference to form a phase stator core, so the combination is convenient; Armature The winding is a ring-shaped concentrated winding, which is easy to wind and has less ends, and is placed parallel to the transition core. The rotor is composed of a core punching piece and a permanent magnetic steel, in which the core punching piece is fan-shaped and stacked along the axial direction, and the permanent magnet is cut along. Magnetizing, and the adjacent two magnets are opposite in polarity, and the magnets are interleaved with the cores to form a bilateral concentric magnetic rotor structure, as shown in b. Its working principle is similar to the Weh prototype. The structural schematic of the two-phase TFPM motor is based on the three-dimensional magnetic field analysis plane of the equivalent magnetic network. When neglecting the effect of the end leakage flux (except for the disk motor), the finite element analysis for a two-dimensional field can often be simplified. The TFPM motor is not the case. Its main magnetic circuit is perpendicular to the direction of motor motion and is a three-dimensional field problem, thus increasing the difficulty of analysis. A method of three-dimensional electromagnetic field analysis—three-dimensional equivalent magnetic network method—is introduced. The 3D magnetic potential generated by a toroidal winding is concentrated in a winding window and is equivalent to a permanent magnet. It is a non-rotating field and satisfies rotH=0. The conditions, quoting the scalar magnetic bits and hexahedron-dividing the solution area at the same time, have the advantages of convenient dissection, strong intuitiveness, good convergence, etc. In the magnetic field analysis, the magnetic circuit between each phase and each pole of the TFPM motor is independent. The periodic boundary conditions can be used to perform magnetic field analysis only on the element poles shown in b. The network is split using cylindrical coordinates, the radial direction of the motor is defined as the r-axis, and 28 nodes are divided; Rotation direction) is defined as 0 axis, 37 nodes are divided, every 1° mechanical angle is a node, the axis is defined as z axis, and 17 nodes are divided, a is an axial projection of the splitting, b Divided radial projection. The three-dimensional grid section diagram gives the three-dimensional air gap magnetic flux density distribution map of the prototype in the position shown. It can be seen that due to the use of a rotor magnetization structure, the air gap of the prototype has a higher magnetic flux density, which can reach 1.23T. At the same time, both internal and external air gaps participate in energy conversion, and the magnetic field utilization rate is high. Different rotor positions and different currents are calculated separately to obtain various characteristic curves of the prototype. The dashed line shows the static electromagnetic torque curve obtained by calculating the Maxwell tension on the air-gap interface at a current of 10A. It should be noted that due to the influence of the self-positioning torque of the permanent magnet, the electromagnetic torque appears in some conventional motors. Since the main magnetic field and the direction of motor motion lie in the same rotation, the pulse 1 can be added/suppressed using a polyphase structure. Lnet U) Outer gas Wifi dense distribution (b) Internal gas fit Magnetic density distribution No-load air gap Magnetism Three-dimensional distribution Static torque curve 5 Prototype static torque test Based on the above analysis, we designed and fabricated a combined stator bilateral polymagnetic TFPM Test prototype. The main design data of the prototype is: test curve. It can be seen that the test curve is basically consistent with the calculation results of the three-dimensional electromagnetic field, which shows the correctness of the above magnetic field analysis, and lays a good software platform for further research of the transverse magnetic field permanent magnet motor. We also designed a TF>PM motor control system based on the ADMCF340 DSP to build an experimental platform for further study. 6 Conclusions The transverse magnetic field permanent magnet motor has the characteristics of high torque density, flexible design and convenient control, and is particularly suitable for applications requiring low speed, high torque, and direct drive. This paper presents a new topology of TFPM motor, which uses a combined stator, bilateral magnetic rotor structure, has a simple structure, easy processing, high magnetic field utilization characteristics; introduced its structural characteristics, and through three-dimensional equivalence The magnetic network method was used to analyze the magnetic field of the prototype, a prototype was made, and a preliminary experimental study was conducted on the prototype. The prototype test results are basically consistent with the theoretical analysis, which proves the correctness of the above analysis method. At present, there is no more in-depth research report on the transverse magnetic field motor in our country, I believe that the above work will lay a certain foundation for China's research in this field. Household Infrared Thermometer,Home Digital Forehead Thermometer,Handheld Digital Infrared Thermometer,Household Thermometer Chengdu Augus Science Technology Co., Ltd. , https://www.vluckyaugus.com