三相正弦波變頻電源畢業(yè)設(shè)計(jì)(doc畢業(yè)設(shè)計(jì)論文)-展示頁(yè)
2025-06-29 04:21本頁(yè)面
【正文】 WM調(diào)制、單片機(jī)控制采樣及顯示界面等九大部分。關(guān)鍵詞：三相正弦波，變頻，PMW脈沖寬度調(diào)制，逆變Abstract: This threephase sine wave frequency conversion power supply is based on the principles which are threephase alternating current, pulse width modulation, contradictory change circuit, FPGA and MCU. This power supply can export the virtual value of line electricity voltage which is 36V, and the maximum virtual value of the load current is 3A. This power supply also can survey the outputs of voltage, current, frequency and power. At one time, the power supply can protect itself when the current is excessive, or the load is short of threephase, or the load is not asymmetry. This power supply is consisted of 9 parts which are muting electric bridge, filter circuit, contradictory circuit, buffer circuit, litter current magnifying and sampling circuit, large voltage dispart and sampling circuit, FPGA controlling PWM modulation, MCU controlling sampling and display interface. The contradictory circuit uses IM14400 to meet the needs in the subject. The amplification of litter current uses the instrument amplifier AD620 to achieve precise amplification.The dispart of large voltage uses metal film precision resistance to realize precise voltage dispart .The measurement of the outputs of voltage and current uses the virtual value chip measurement of the frequency adopts the same precision measurement in FPGA to meet the needs. Key words: threephase, frequency conversion, PMW (Pulse Width Modulation),contradictory change
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