| Summary: | 碩士 === 崑山科技大學 === 機械工程研究所 === 96 === This thesis is based on digital signal processor, DSPIC30F4011, as core control that researches on brushless DC motors’ load variance control. Conventional motor often does not have the best performance under various loading conditions and set the v/f speed by open-loop control will be affected by load variance easily. Therefore, control system comes up with a strategy by using closed-loop integral-proportional (IP) control, Bumpless transfer speed control, and complementary pulse width trade flow to modulate brushless DC motor in order to decrease system reaction overshot and reaction time.
Testing several different conditions, such as no-load, applied load, various loads, and tow guard against system(拖帶防制) to obtain the best parameters after estimation and adjustment in order to achieve smooth and sturdiness output torque and faster speed response. These enable the driver to have better speed transient response and load interference clearance ability to achieve speed stability under load variance conditions. It has been proved and conforms to research expectation.
Furthermore, this thesis’s theory has tested with a practical various loading that installed with brushless DC motor and collocates with humanized design human-machine interaction interface written by Visual Basic (VB). User can observe motor’s performance through monitor to verify theory’s correctness and feasibility.
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