基于DMPM的发动机有源减振器设计与仿真研究

Design and Simulation Research on Active Damper of Engine Based on DMPM

双机械端口电机(Dual Mechanical Ports Electric Machine,DMPM)是一种具有两个机械端口和两个电气端口的新型电机,基于该种电机的混合动力系统能够实现电力无级调速,已成为混合动力汽车研究领域中的一个热点。该系统中的双机械端口电机内转子和发动机之间设计有扭转减振器来抑制发动机的脉振转矩。在分析发动机曲轴输出转矩特性和DMPM能量传递原理的基础上,设计了基于DMPM的发动机有源减振器及其控制原理框图。在Matlab/Simulink下建立了验证基于DMPM发动机有源减振器设计结果的仿真平台,理论分析和经过仿真表明:通过脉振转矩补偿,内电机能够实现发动机平均转矩和脉振转矩传递到外电机;通过外电机实现对发动机脉振转矩补偿,实现了基于DMPM的发动机有源减振器功能。所以所设计的有源减振器可以替代扭转减振器,所建立的仿真模型直接实现对控制算法的验证,为系统后续的实验研究提供了依据。

The Dual Mechanical Ports Machine（DMPM） is a novel motor with two mechanical ports and two electrical ports. The Hybrid Electric Vehicle（HEV） based on such machine has been the research hotspot for it can achieve Electric Variable Transmission. In this system, a torsional-vibration-damper was designed between the engine and the inner rotor of the DMPM to reduce pulsating torque from the engine. An active damper of the engine and its control schematic diagram was designed by analyzing on output torque characteristics of the engine’s crank shaft and the energy transference principle of DMPM. The simulation platform used to verify the design result of engine’s active damper based on DMPM was built in Matlab/simulink, the theoretical analysis and simulation results show that the average torque and pulsating torque can be transferred from inner motor to outer motor by pulsating torque compensation and the active damper of the engine based on DMPM can be implemented by compensating engine’s pulsating torque from outer motor. Therefore the torsional-vibration-damper can be replaced by the active damper designed, and the simulation model built can verify the control algorithm directly and provide a basis for follow-up experimental research of the system.