【作者】 张祖峰；

【导师】 张性雄； 沈美雄；

【作者基本信息】 福建农林大学 ， 农业机械化， 2008， 硕士

【摘要】 农用车风机用小型电机的特点是:短轴(扁平型)、单台电功率小于300瓦,但是数量巨大,因此降低这些小型风机的耗电量,缩小与先进国家的差距具有十分深远的经济意义。无刷电机具有体积小,重量轻,高效节能的优异特性,特别适用于农用车辆。为提高永磁无刷直流电机的性能,必须研究抑制其齿槽脉动的技术措施,本文对短轴(扁平型)无刷电机的转矩脉动及抑制进行研究,给出解决方案并通过实验加以验证。本文的目的是基于降低成本的原则,从永磁材料、磁体结构、充磁方式、绕组分布、极弧系数等方面分析了适合农用车风机用永磁无刷直流电机的设计要求,设计制造了外转子风机用永磁无刷直流电机样机;根据外转子电机的机械结构与农用车用小型风轮的特点,本论文提出一种新工艺:将电机转子的磁轭直接装置于风轮的型腔内,构成新型外转子,节省了材料且简化了外转子加工与动平衡工艺。由于工艺简单,省材,成本低,使得无刷风机在农用车辆的推广应用具有现实意义。样机实测数据表明外转子永磁无刷直流电机用于驱动小功率风机具有良好的性能、较低的成本,具有进行产业化生产的优势。更多还原

【Abstract】 The small-scale wind-round DC Motor with minor axis for the used of agricultural vehicle have their own properties, each individual consumes little (less than 300w ) but the quantities of the wind-round are large. So it is very meaningful to reduce the consumption of the small-scale wind-round for improving the construction of modernization and narrowing the gap between our state and developed countries.Permanent Magnet Brushless DC Motor (PMBDCM) is suitable for agricultural vehicle by its specific property of more efficient density. In this paper, torque ripple suppression techniques have been studied in details and some novel effective measures have been proposed because reducing cogging force is indispensable for improving the minor axis PMBDCM.In this paper, we analysis the motor from material, magnet structure, magnetization, and the coefficient of magnet arcs and we provide the structure, principles and design demands of the motor, we could manufacture of the outer rotor PMBDCM to meet the target of cost saving. According to the characteristics of the outer rotor motor mechanical structure and the small-scale wind-round in agricultural vehicle, this paper presents a new technology: the magnetic rotor yoke devices directly build in the wind-round cavity to constitute a new outer rotor to save material and simplify the processing and outside the rotor balancing process. As the process simple, provincial materials, low cost, makes the motor in the agricultural vehicle to promote the application of practical significance. Prototype measured data show the motor has a good cost-effective performance of the advantage of industrial production.更多还原