适用于Vienna整流器的非连续脉宽调制OA
Discontinuous Pulse Width Modulation Suitable for Vienna Rectifier
Vienna整流器凭借高功率密度和高可靠性的优点,被广泛应用于通信电源和电动汽车充电等中高压大功率场合.为实现Vienna整流器的功率因数校正(PFC)电路特性,需控制交流侧电流为与电网电压同频率、同相位的正弦波,降低电流过零畸变;为进一步提高Vienna整流器的功率密度,需尽可能降低开关损耗.从空间矢量的角度分析适用于Vienna的空间矢量调制策略,并根据控制目标的不同,分别提出可以最大程度降低开关损耗和可以降低电流过零畸变的非连续脉宽调制(DPWM)策略,最后通过仿真比较了所提出两种DPWM策略与SVPWM策略,验证了所提出的两种DPWM策略的可行性和优越性.
With its advantages of high power density and high reliability,Vienna rectifier is widely used in communication power supply and electric vehicle charging and other high-voltage high-power situations.In order to realize the power factor correction(PFC)circuit characteristics of Vienna rectifier,the AC side current should be controlled as a sine wave with the same frequency and phase as the grid voltage to reduce the zero crossing distortion of the current.To further improve the power density of Vienna rectifier,switching losses should be reduced as much as possible.From the perspective of space vector,the space vector modulation strategy applicable to Vienna is analyzed.According to different control targets,discontinuous pulse width modulation(DPWM)is proposed to reduce the maximum switching loss and the zero crossing distortion of the current.Finally,the two proposed DPWM strategies are compared with SVPWM strategy through simulation.The feasibility and superiority of the two proposed DPWM strategies are verified.
庄庆旭;刘海勋
浙江大汽新能源有限公司,浙江温州 325000合肥工业大学,安徽 合肥 230009
动力与电气工程
Vienna整流器电流过零畸变非连续脉宽调制开关损耗
Vienna rectifierzero-crossing distortion of current converterdiscontinuous pulse width modulation(DPWM)switching loss
《电器与能效管理技术》 2024 (002)
33-38 / 6
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