A method for suppressing conducted interference in parallel drive systems based on modulated wave phase shift
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摘要:
分布式电推进系统作为全电飞机、电动船舶等载运工具电气化发展的重要方向,通常采用多功率变换器并联的驱动架构。随着变换器数量的增加,电磁干扰也会加剧,从而直接威胁到系统的安全稳定运行。为抑制并联驱动系统产生的传导干扰,提出一种基于调制波移相的并联驱动系统传导干扰抑制方法。在深入分析系统电磁干扰噪声耦合机理的基础上,通过多端口网络模型级联建立并联驱动系统的传导干扰等效模型。通过引入实时位置电流补偿对各驱动器调制波进行移相控制,使各驱动器产生的共模噪声相互抵消。针对双电机并联驱动架构,在MATLAB/Simulink仿真环境和暗室实验环境下进行仿真与实验验证。结果表明:当驱动器同相调制波相位相差为360(°)/
m (m 为并联驱动器数量)时,噪声下降最为显著。所提方法适用于驱动模块参数一致的并联驱动系统,在不显著影响系统性能指标的前提下,显著降低了系统的传导干扰,对分布式电驱动系统设计具有一定参考价值。Abstract:The drive architecture with many power converters in parallel is typically used in distributed electric propulsion systems, which are a key avenue in the development of electrification for all-electric aircraft, electric ships, and other transport vehicles. With the increase of the number of converters, electromagnetic interference will be intensified, which directly threatens the safe and stable operation of the system. In order to suppress the conducted interference generated by parallel drive systems, a modulated wave phase-shifting control strategy is proposed. Based on the in-depth analysis of the coupling mechanism of electromagnetic interference noise in the system, the conducted interference equivalent model of the parallel drive system is established through the cascade of a multi-port network model. By introducing real-time position current compensation, the modulation wave of each driver is controlled by phase-shifting, so that the common mode noise generated by each driver cancels out each other. The simulation and experimental verification are carried out in a MATLAB/Simulink simulation environment and a darkroom experiment environment for a dual-motor parallel drive architecture. The results show that when the phase difference of the driver modulation wave is 360°/
m (m is the number of parallel drivers), the noise reduction is most significant. This technique greatly lowers the system's conducted interference without appreciably altering the system performance index, and it works well with parallel drive systems that have the same drive module specifications. It has a certain reference value for the design of a distributed electric drive system. -
表 1 永磁同步电机参数
Table 1. Parameters of permanent magnet synchronous motor
额定电压/V 额定电流/A 额定功率/W 额定转速/
(r·min−1)额定转矩/
(N·m)220 10 1 500 1 500 10 表 2 永磁同步电机驱动器参数
Table 2. Permanent magnet synchronous motor driver parameters
直流
电压/V直流
电流/A交流
电压/V交流
电流/A开关频
率/kHz工作
温度/℃额定
功率/kW≤800 ≤17 ≤800 ≤16 10 −5~45 10 表 3 实验平台设备参数
Table 3. Experimental platform equipment parameters
设备名称 型号 数量 设备参数 可编程直流电源 Preen ADG+ 1 800 V(dc) 高压直流LISN SOLAR 2 1 000 V(dc) EMI 测试接收机 R&S®ESW 1 1 Hz~26 GHz 电机驱动器 M10015LB 2 10 kW 永磁同步电机 TP210-I 2 1.5 kW 射频电流探头 FCC F-52B 1 10~ 400000 kHz -
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