一种新型IGBT多阶段驱动方法

发布时间：2018-04-15 18:20

本文选题：IGBT多阶段驱动方法 + 反馈控制　；参考：《浙江大学》2017年硕士论文

【摘要】：绝缘栅双极型晶体管(IGBT)在各种中大功率电力电子装置中得到广泛应用,但是IGBT在开关瞬态产生的电压过冲和电流过冲,不但会增加电路电磁干扰,甚至会损坏器件。因此,通过IGBT驱动电路时就需要考虑减小IGBT在开关瞬态中的电压过冲和电流过冲的方法受到广泛的关注。本论文以IGBT有源驱动为研究对象,对多阶段驱动方式对IGBT开关特性的影响进行研究。首先,论文对IGBT的开关特性及现有的IGBT多阶段驱动方法进行了分析,传统多阶段驱动方法通过在特定驱动阶段改变驱动电压或者驱动电阻的方式以抑制IGBT在开关瞬态中的电压过冲和电流过冲,但是这一方法也存在一些缺点如驱动电路复杂、控制信号易受干扰,模拟电平隔离困难,损耗增加明显等。为了解决现有IGBT多阶段驱动方法的一些缺点,优化其性能,本文提出了一种新型IGBT多阶段驱动。该方法基于电压变化率和电流变化率的信号反馈,通过电压和电阻复合改变的方法,将IGBT开关过程分阶段控制,在达到控制效果(电压电流过冲)的前提下减小开关时间和开关损耗,通过数字控制电路完成反馈控制,简化了驱动电路。最后,论文搭建了仿真模型双脉冲测试平台进行验证,给出了实验结果,仿真和实验测试验证论文所研究的新型多阶段驱动方法的优点。
[Abstract]:Insulated gate bipolar transistor (IGBT) is widely used in various medium and high power power electronic devices, but the voltage overshoot and current overshoot produced by IGBT in the switching transient will not only increase the electromagnetic interference of the circuit, but also damage the device.Therefore, the methods to reduce the voltage overshoot and current overshoot of IGBT in the switching transient need to be considered in the IGBT drive circuit.In this paper, IGBT active drive is taken as the research object, and the effect of multi-stage drive mode on IGBT switch characteristics is studied.Firstly, the switching characteristics of IGBT and the existing IGBT multi-stage drive methods are analyzed.The traditional multi-stage drive method can suppress the voltage overshoot and current overshoot of IGBT in the switching transient by changing the driving voltage or resistance at a specific driving stage. However, this method also has some disadvantages, such as the complexity of the drive circuit.The control signal is easy to interfere, the analog level isolation is difficult, the loss increases obviously.In order to solve the shortcomings of the existing IGBT multi-stage drive methods and optimize its performance, a new type of IGBT multi-stage driver is proposed in this paper.Based on the signal feedback of voltage change rate and current change rate, the IGBT switch process is controlled by the method of voltage and resistance compound change.On the premise of the control effect (voltage and current overshoot), the switching time and switching loss are reduced, and the drive circuit is simplified by the digital control circuit to complete the feedback control.Finally, the paper builds a simulation model of double-pulse test platform for verification, and gives the experimental results, simulation and experimental tests to verify the advantages of the new multi-stage driving method studied in this paper.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN322.8

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