外文翻譯--pwm整流器中的應(yīng)用自反饋串級(jí)調(diào)速系統(tǒng)-其他專業(yè)-資料下載頁(yè)
2025-01-19 09:50本頁(yè)面
【導(dǎo)讀】技術(shù)的串級(jí)調(diào)速系統(tǒng)方案。在此系統(tǒng)中，用IGBT代替了可控硅。它可以提供電容式無。功功率去補(bǔ)償傳統(tǒng)的串級(jí)調(diào)速系統(tǒng)產(chǎn)生的感應(yīng)無功功率，因此，它可以提高功率因數(shù)。中介紹了PWM整流器和PWM電流控制方案。最后給出了仿真結(jié)果和結(jié)論，結(jié)果表明，機(jī)和泵，使用多能量，因此節(jié)能的風(fēng)機(jī)和水泵正在成為工業(yè)生產(chǎn)的主要問題之一。好，更便宜，不僅能平滑調(diào)速還能節(jié)能20％?但是，傳統(tǒng)的級(jí)聯(lián)速度控制系統(tǒng)具。有低諧波因素和多一些缺點(diǎn)。功率因數(shù)高負(fù)荷，高速低轉(zhuǎn)速負(fù)荷。這個(gè)缺點(diǎn)阻礙了延伸和串級(jí)調(diào)速中的應(yīng)用。統(tǒng)方案的基礎(chǔ)上，提出了PWM整流器。在新的計(jì)劃中，晶閘管逆變器被IGBT代帶，并。一個(gè)新的三相對(duì)稱繞組命名調(diào)整繞組定子繞組上，建立的初級(jí)繞組稱為主繞組。外的電動(dòng)勢(shì)繞組的調(diào)整是由主繞組引起的。與轉(zhuǎn)子繞組，其速度可以通過改變其規(guī)定。無功功率提升，功率因數(shù)作為反角增加而減少。因此，電機(jī)的旋轉(zhuǎn)速度可通過調(diào)節(jié)控制脈沖寬度的比例。PWM整流器網(wǎng)側(cè)電感為圖3顯示的特征。
【正文】 DE SPEED CONTROL SYSTEM Simulate the PWM rectifier cascade speed control system base on the structure of and the direct current control strategy of . The simulation parameters are: the rated power of innerfeeding motor is 710kW, the stator rated voltage is 6000V, the rated current is 72A, the voltage of adjusting winding is 510V, the rated speed is 1487r/min. The inductance in AC side is , the capacitance in DC side , the DC voltage is 1200V. The results of simulation are , and . From , the DC voltage works on 1200V, it is beneficial to regulate the speed smoothly. is the A phase voltage and current of PWM rectifier AC side. It shows that PWM rectifier runs on capacitance characteristic. So it transports active power to the grid meanwhile produces capacitive reactive power. Hence the system works on unity power factor, as the waveform of voltage and current in . In conventional chopping cascade speed regulation system, because thyristor is halfcontrolled device, the inverter runs on inductance characteristic and the current waveform is not sine wave. Hence current delays voltage in side and the power factor of the system is poor. The current and voltage of thyristorinverter and grid is shown in and Besides the new cascade speed control system has much less harmonic. From and , the total harmonic distortion（ THD） of the new system is %, it is about half of the conventional chopping cascade speed regulation system which is %. VII. CONCLUSION This paper proposed a new cascaded speed control system scheme based on PWM rectifier. The simulation verified the analysis of new control system that the new system can work in unity power factor. Compared with conventional chopping cascade speed regulation system, the new cascade speed control system saves reactive power pensation device and decreases harmonic. So the PWM rectifier cascade speed regulation system will be applied widely in the future. VIII. REFERENCES Periodicals: [1] Mariusz Malinowski, and Marek Jasin’ski, Simple Direct Power Control of ThreePhase PWM Rectifier Using SpaceVector Modulation (DPCSVM), IEEE TRANSACTION ON INDUSTRIAL ELECTRONICS, vol. 51, , Apr. 2021. [2] Jiang Youhua, Ning Yu, and Gong Youmin, Research on Unity Power Factor Innerfeed Chopper Cascaded Speedadjusting System, Power Electronics, , , December, 2021. Books: [3] Zhang Chongwei and Zhang Xing, PWM Rectifier and Control Strategy, Beijing: China Machine Press, 2021. [4] Chen Baishi, Electricity Pull Automation Control System, Beijing: China Machine Press, 1997 Dissertations: [5] Song Guiying, Internal Feedback Motor and Speed Regulation System, Master degree dissertation, Hebei University of . BIOGRAPHIES Ma Changxiao was born in China on Sep. 18, 1982. He joined the North China Electric Power University in 2021. Now he is pursuing his master’s degree in School of Electrical and Electronically Engineering and his major is Power Electronics and Electrical Drives. Email: Wang Aimeng was born in China in 1963. She works in North China Electric Power University as a associate professor. Being as visiting scholar in University of WisconsinMadison from to . Email:
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