IGBT串联均压高压变频器的研究

发布时间：2018-05-22 17:55

本文选题：高压变频器 + 矢量控制　；参考：《哈尔滨理工大学》2014年硕士论文

【摘要】：随科技的不断发展，高压大容量电动机得到了广泛应用，从而高压变频器获得了广阔的发展空间。在高电压等级下选取合适的开关器件异常关键。IGBT在很多方面具有明显优势，但在大容量变频器中，时下单只IGBT的电压和电流等级还达不到要求，因此单元级联高压变频器和基于IGBT串联高压变频器分别在不同场合得到了广泛应用。利用矢量控制系统控制高压变频器响应速度更高，可使高压变频器更快速、精确的工作，转矩响应比较好，高压变频器矢量控制技术以及功率单元IGBT串联的均压技术是当今电力电子领域研究的热点。本文对当前各种IGBT串联有源均压策略进行比较分析，具体研究了IGBT栅极侧阻容二极管有源串联均压策略，并对其进行了仿真分析。然后在研究了高压变频器矢量控制策略的基础之上，，建立了数学模型，并对电压空间矢量调制技术（SVPWM）进行了较深入的研究。在此基础上，搭建了Matlab仿真模型，对矢量控制策略进行了仿真分析。在可行性分析之后，把矢量控制确定为高压变频器的控制方式。最后论文以PIC18F2331为核心控制芯片，采用矢量控制策略，搭建了一台功率为2kW的实验样机，功率部分采用IGBT栅极侧有源均压的方式。驱动模块采用2SD315A，驱动供电系统为低压取能中的电磁送能方式。2kW的实验样机的测试结果表明，该系统矢量控制的控制精度高，功率模块串联IGBT均压特性良好，此实验样机达到预计要求。
[Abstract]:With the continuous development of science and technology, high-voltage large-capacity motor has been widely used, thus the high-voltage frequency converter has a broad development space. Selecting appropriate switch device abnormal key under high voltage level. IGBT has obvious advantages in many aspects, but in large capacity inverter, the voltage and current level of single IGBT is not up to the requirement. Therefore, cascaded unit high-voltage inverter and series-based IGBT-based high-voltage converter are widely used in different occasions. Using vector control system to control high voltage inverter response speed is higher, can make high voltage frequency converter faster, accurate work, torque response is better, The vector control technology of high voltage inverter and the voltage sharing technology of power unit IGBT in series are the hot spots in the field of power electronics. In this paper, the current IGBT series active voltage equalizing strategies are compared and analyzed, and the active voltage equalizing strategies of IGBT gate side resistive diodes are studied in detail, and the simulation analysis is carried out. Then, based on the research of vector control strategy of high voltage inverter, the mathematical model is established, and the voltage space vector modulation (SVPWM) technology is studied deeply. On this basis, the simulation model of Matlab is built, and the vector control strategy is simulated and analyzed. After feasibility analysis, vector control is determined as the control mode of high voltage inverter. Finally, using PIC18F2331 as the core control chip and vector control strategy, an experimental prototype with power of 2kW is built. The power part adopts the IGBT gate side active voltage sharing mode. The test results show that the vector control accuracy of the system is high, and the power module in series IGBT has good voltage-sharing characteristics, and the driving module adopts 2SD315A, and the driving power supply system is the electromagnetic energy transmission mode in low voltage. The test results show that the control accuracy of the vector control system is high, and the power module in series IGBT has good voltage sharing characteristics. The experimental prototype meets the expected requirements.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM921.51

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