目前市場主流之小型壓縮機，主要使用單相感應馬達作為動力來源，感應馬達因為二次銅損，導致效率較永磁同步馬達差，然而永磁同步馬達需要得知轉子位置資訊進行激磁，需仰賴驅動器。本研究將單相感應馬達與永磁同步馬達特性結合，完成一單相自啟動永磁同步馬達，該馬達在啟動時依靠感應轉矩進行啟動，在高速時利用磁鐵之永磁轉矩進行同步運轉，馬達在同步轉速時，鼠籠繞組內無感應電流，可以降低二次銅損，提高效率，除此之外，加入磁鐵後還可以提高馬達之功率密度。本研究會提出一套轉子設計流程，並對迴轉式壓縮機進行負載分析，在同樣負載下與原單相感應馬達比較，自啟動馬達效率高出3%~5%，且穩定運轉於3000rpm，對於冷凍空調系統之冷房效率有正面影響。本研究最終會實作一原型機進行量測，驗證模擬之正確性。

The small compressors in the mainstream market primarily use single-phase induction motor as a power source. Because of the second side copper loss, the induction motors’ efficiency are worse than that of the permanent magnet synchronous motors. However, the excitation of the permanent magnet synchronous motors requires the information of the rotor position, and that relies on inverters. In this Study, a single-phase induction motor is combined with the permanent magnet synchronous motor to complete a single-phase line-start permanent magnet synchronous motor. The motor is started by the induction torque and is synchronized by the permanent magnet torque at high speed operation. At the synchronous speed, the squirrel cage winding doesn’t induced current, so the second side copper loss can be reduced, and efficiency is improved; in addition, the power density can also increase.
This study proposed a set of rotor design flow, and load analysis of the rotary compressor. Compared with the original single-phase induction motor in the same loading, the efficiency of the line-start permanent magnet synchronous motor is higher by 3% to 5%, and able to work at 3000rpm stably. The result has a positive influence on the cooling efficiency of the air conditioning system. This study will eventually implement a prototype for measurement and verification of the simulation.

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