液驱混合动力车辆中液压变压器压力控制系统研究

摘要

Rotating load driving without throttling loss is realized by hydraulic transformer (HT). The output pressure is controlled by adjusting the rotary angle of HT valve plate to meet the requirements of the working condition with different load. The mathematical model of the rotary angle of HT valve plate is established. The rotate speed and flow formulas of the HT are deduced and the model of HT press control system is built. The simulation of the system is researched. The results show that the HT is characterized by a good servo performance.%液压变压器实现了无节流损失驱动旋转负载.通过调节液压变压器的配流盘转角来控制液压变压器输出的压力,用以满足不同负载转矩要求.建立了配流盘转角的数学模型,推导了液压变压器的转速和流量数学模型,构建了液压变压器压力控制系统模型,并对系统进行了仿真研究.结果表明,液压变压器压力控制系统具有良好的伺服性能.