| Summary: | 碩士 === 國立成功大學 === 電機工程學系 === 105 === At the moment, the general motor design methods usually adopt the long operation at the using point as the design criterion. This research is targeted at the motor used in axial-flow fan and the general cooling system that required long operation time, and thus the permanent magnet brushless DC motor is utilized. According to the performance characteristics of the fan and also the influence factors in practical applications, such as air temperature, humidity, pressure and density, the using point of the practical application actually will not be a fixed one.
Therefore, this paper firstly analysed the performance characteristics of the axial-flow fan by load analysis, and then the analysed result is adopted in motor matching design to further realize the motor matching design and improve motor efficiency. The finite element simulation software is conducted in the design and analysis, the prototype is established, and finally the results of axial-flow fan of practical applications is compared and verified to be in line with the expected target.
Motor design of simulation results, accord the load analysis results of axial-flow fan. And the results of the measured, the high efficiency range matched the characteristic speed range of the axial-flow fan, speed at 5600 rpm to 7200 rpm, and the highest efficiency point raised by 9%.
Establish process matching design of permanent magnet brushless DC motor design and load analysis results, matching design of motor and improve the efficiency of motor applications.
Key words: Axial flow fan, fan motor, load analysis, BLDC motor, matching design.
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