风机用永磁无刷直流电机的设计与性能分析

发布时间：2018-01-16 05:25

本文关键词：风机用永磁无刷直流电机的设计与性能分析　出处：《哈尔滨工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：本文提出设计一种精密空调风机用的永磁无刷直流电机,通过提高电机效率、灵活调速以调节空调风量从而实现节能和降低产品成本和运营成本的目标。近年来,随着电力电子技术、永磁材料科学和现代控制理论等的快速进步,永磁无刷直流电机迅速发展、成熟起来,并已在工业上大规模应用。永磁无刷直流电机用的是一套电子换向装置,这样既消除了机械换向带来的维护频繁、有火花、有噪音和电磁干扰大等一系列问题,又具备了直流电机的调速性能好、运行效率高等诸多优点,因此在相关领域里得到了广泛应用。本文首先结合永磁无刷直流电机的本体结构、工作原理和数学模型等分析了设计风机用外转子永磁无刷直流电机的永磁体材料选择、永磁体结构、绕组分布、极弧系数等参数。结合电机的传统设计方法和有限元分析理论,应用ANSYS Maxwell软件设计出一款外转子永磁无刷直流电机。确定了电机定子参数:外径、内径及槽数,电机转子参数:外径、内径、极数,气隙宽度,定子绕组三相“Y”型,有限元相关参数的设置等。对电机的静磁场、瞬态特性、起动时的转矩及电流、反电势、电感参数与电流及功率的关系等进行了有限元仿真分析。针对永磁无刷直流电机固有的齿槽转矩现象经行分析,在不改变电机结构的基础上,提出了几种适合于风机用电机的有效削弱齿槽转矩的方法,并运用ANSYS Maxwell软件进行了仿真分析。最后,对试验样机经行了节能测试、噪声测试,以验证电机设计的正确性、经济性、实用性等。
[Abstract]:In this paper, a kind of permanent magnet brushless DC motor for precision air-conditioner fan is designed, and the efficiency of the motor is improved. In recent years, with the rapid progress of power electronics technology, permanent magnet material science and modern control theory, the goals of energy saving and reducing product cost and operation cost can be realized by adjusting air flow rate of air conditioning system. Permanent magnet brushless DC motor has developed rapidly, matured, and has been widely used in industry. The permanent magnet brushless DC motor uses a set of electronic commutator, which eliminates the frequent maintenance brought by mechanical commutation. There are a series of problems, such as sparks, noise and electromagnetic interference, and it has many advantages, such as good speed regulation performance and high running efficiency of DC motor. Therefore, it has been widely used in related fields. Firstly, this paper combines the body structure of permanent magnet brushless DC motor. The working principle and mathematical model of the permanent magnet material selection, structure and winding distribution of permanent magnet brushless DC motor with external rotor for fan design are analyzed. Combined with traditional design method of motor and finite element analysis theory. A permanent magnet brushless DC motor with outer rotor is designed by using ANSYS Maxwell software. The stator parameters such as outer diameter, inner diameter and slot number are determined, and rotor parameters: outer diameter, inner diameter and pole number are determined. Air gap width, stator winding three-phase "Y" type, finite element parameters setting. Static magnetic field, transient characteristics, starting torque and current, back EMF. The relationship between inductance parameters and current and power is simulated by finite element method. The phenomenon of tooth slot torque of permanent magnet brushless DC motor is analyzed without changing the structure of permanent magnet brushless DC motor. In this paper, several methods of effectively reducing the torque of tooth slot for fan motor are put forward, and the simulation analysis is carried out by using ANSYS Maxwell software. Finally, the test prototype is tested for energy saving. Noise test to verify the correctness of motor design, economic, practical and so on.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM33

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