Frequency-selective Optimization of Periodic Gate Control Signals in DC/DC Converters for EMI-reduction
作者机构：On-board Systems LabTU Dortmund UniversityDortmund 44227Germany
出 版 物：《Chinese Journal of Electrical Engineering》 (中国电气工程学报（英文）)
年 卷 期：2022年第8卷第4期
页 面：11-18页
核心收录：
学科分类：080903[工学-微电子学与固体电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学]
主 题：Power electronics active gate driving electromagnetic compatibility Newton’s method
摘 要：High-frequency switching of power transistors in power electronic systems can cause electromagnetic emissions.Simple approaches for reducing high-frequency disturbances,such as inserting an additional gate resistor,lead to increased power losses.This makes achieving both electromagnetic compatibility and power efficiency difficult.Active gate drivers help to find a trade-off between these two.Typically,only narrow-band disturbances must be reduced.Accordingly,a target signal with a spectrum notched at some frequencies can be defined.The target signal can be reached by a target-signal-oriented control of the transistor’s gate.This leads to steeper switching slopes,such that the power losses are less increased.Generating arbitrary target signals is impossible.The transistor signal exhibits some physical limitations.A constraint satisfaction problem must be solved,and the gate drive signal must be optimized by applying a residual and Newton’s method.The proposed optimization process in the frequency domain is based on the circuit simulation method named“harmonic balance.Measurements on a DC/DC converter exhibit the benefits of this method.
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