| Summary: | 碩士 === 國立宜蘭大學 === 機械與機電工程學系碩士班 === 101 === This study establishes the position memory function for automotive power seat motors without using any position sensors. Their positioning performances are compared with motors using hall effect sensors feedback control. The reasons for power seat positioning error with or without position sensors are exploited. Through the compensating mechanism built by this study, the automotive power seat achieves positioning accuracy that meets the test specifications. For the sensorless position control, this research proposes several different software algorithms and hardware feedback circuits to accomplish positioning control, and compares the advantages and disadvantages to different approaches of realization. This study also suggests a contactless H-Bridge driving circuit structure. From theoretical analysis and experimental results, this contactless H-Bridge driving circuit can effectively solve the positioning error while the motor starts or stops, and improve the positioning control. Finally, we apply the technique of sensorless control to automotive cooling fans, and experimental results, that prove the feasibility for the motor to obtain sensorless speed control function.
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