电机控制器直流侧前置Buck_B_省略_变换器的母线电容电流控制策略研究_张旭辉.pdf

DOI:10.13334/j.0258-8013.pcsee.2012.30.009 32 30 Vol.32 No.30 Oct.25, 2012 2012 10 25 Proceedings of the CSEE ©2012 Chin.Soc.for Elec.Eng. 23 0258-8013 (2012) 30-0023-07 TM 46 A 470·40 Buck/Boost ( 100190) Research on the Bus Capacitor Current Control Scheme for Buck/Boost Bi-directional Converters in Motor Drive Systems ZHANG Xuhui, WEN Xuhui, ZHAO Feng (Institute of Electrical Engineering, Chinese Academy of Sciences, Haidian District, Beijing 100190, China) ABSTRACT: A bi-directional Buck/Boost converter is placed 0 in the motor drive system, which can regulate the bus voltages DC/DC for high efficiency and output power. The reason that the traditional control scheme cannot suppress bus voltage (bi-directional DC-DC converterBDC) fluctuation caused by motor operation state fast switching is analyzed. On this basis, a novel control scheme with bus [1-2]BDC voltages outer the control loop and bus capacitor currents inner Buck/Boost the control loop for the bi-directional Buck/Boost is presented. For the bus capacitor current can not be measured directly, the [3] [4-5] [6-7] [8-9] paper proposes a new capacitor current calculation method. Small-signal model analysis results of the drive system show Buck/Boost the proposed scheme in this paper has better performance in voltage fluctuation suppression than