A Technique of Measuring Voltage in VVVF Frequency Convert Speed Control
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摘要: 以MCS8098單片機為核心,提出一種新的測量技術.在硬件上采用同步采樣技術,在軟件上實現準同步算法,并且采取了預先存準同步采樣權系數和正、余弦值在EEPROM2864的中的方法,提高其實時性,利用傅立葉變換,得到頻域的各次諧波結果,準確地在線測量了變頻調速的諧波,并給出了實驗結果.Abstract: A new technique of measuring voltage in VVVF frequency converting speed control is presented. Basing on single chip microcomputer MCS-8098, the technique uses synchronous sampling in hardware and quasisynchrouous sampling in programming. Some other techniques speeding up the running velocity of programming are also suggested. By DFT, an accuate result can be obtained for each harmonics.
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