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首页> 外文会议>2012 Compressor/Refrigeration amp; Air Conditioning/High Performance Buildings Conferences at Purdue >Design and Development of Three Phase Permanent Magnet Brushless DC (PM BLDC) Motor for Variable Speed Refrigerator Compressor
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Design and Development of Three Phase Permanent Magnet Brushless DC (PM BLDC) Motor for Variable Speed Refrigerator Compressor

机译：变速冰箱压缩机三相永磁无刷直流（PM BLDC）电机的设计与开发。

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A major part of the power consumption in the low-wattage reciprocating compressors, used for householdrnrefrigeration units, is associated with the motor. A variable speed compressor as opposed to a single speedrncompressor is known to provide energy savings due to its ability to match the load demand from the pump morernclosely to the power delivered by the pump. The current article presents an overview of the design and optimizationrnmethodology for a variable-speed, three-phase PM BLDC motor. The design is evaluated for a four polernconfiguration with operating frequencies ranging from 66.66Hz all the way up to 150 Hz. A finite element tool torndetermine performance of the PM BLDC motor with different design parameters like magnet arc lengths andrnthickness, number of stator slots, Back EMF wave shape, skewing etc. is developed. This model is then used forrnobtaining dimensions for the most efficient motor design. A PMBLDC motor model based with-sensor andrnsensorless control strategy is developed for operating the motor at the desired speed while delivering the torquedemandrnto the pump over the desired speed range. The novel feature of the analytical model is how the results of thernprior mentioned FE tool are leveraged. The back EMF wave shape is not idealized as a trapezoidal waveform.rnInstead the back EMF is calculated from an accurate FE model and this data is used to determine the generatedrnvoltage in the analytical model. This ensures a quick (relative to Finite Element simulation) yet accurate simulation.rnThe algorithm is to be implemented on a dsPIC30F6010A microcontroller. Finally, load tests would be performedrnon a dynamometer to evaluate the performance of the motor over the entire speed and load ranges to ensure itrnconforms to the design and operational requirements.
机译：用于家用制冷机组的低功率往复式压缩机的功耗的大部分与电动机有关。已知与单速压缩机相反的变速压缩机由于其使泵的负载需求更接近地与泵输送的功率相匹配的能力而提供了能量节省。本文介绍了变速三相PM PM BLDC电动机的设计和优化方法。该设计针对四极配置进行了评估，其工作频率范围从66.66Hz一直到150 Hz。开发了一种确定永磁无刷直流电动机性能的有限元工具，该设计具有不同的设计参数，例如磁弧长度和厚度，定子槽的数量，反电动势波形，偏斜等。然后将此模型用于确定尺寸，以实现最有效的电机设计。开发了基于PMBLDC电机模型的无传感器和无传感器控制策略，用于以所需速度运行电动机，同时在所需速度范围内将扭矩需求传递给泵。分析模型的新颖之处在于如何利用之前提到的有限元工具的结果。反电动势波形不能理想化为梯形波形。相反，反电动势是根据精确的有限元模型计算得出的，该数据用于确定分析模型中产生的电压。这样可确保快速（相对于有限元仿真）又能进行准确的仿真。该算法将在dsPIC30F6010A单片机上实现。最后，将使用测功机执行负载测试，以评估电动机在整个速度和负载范围内的性能，以确保其符合设计和运行要求。

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