基于电感模型的高压比例电磁阀无传感器位置检测

Sensor-free position detection of proportional solenoid valves based on inductance model

介绍一种基于电感模型的氢气燃料电池汽车用高压比例电磁阀无传感器位置检测的方法,此方法以比例电磁阀的非线性模型为基础,适用于计算或者监测比例电磁阀工作过程中移动铁心的实时位置。经过仿真分析和数学推导,构建出电磁阀的电感模型以及移动铁芯位置检测的计算模型。再对计算模型进行实用性验证实验,结果显示其最大误差在10%以内,符合工程实际应用。该方法简单实用,易于实现,适用于计算或者监测高压比例电磁阀工作过程中移动铁心的实时位置。

A sensor-free position detecting method is introduced to test high-pressure proportional solenoid valves for hydrogen fuel cell vehicle based on an inductance model. This method can be applied to monitor the real-time positions of movable cores in the working process of proportional solenoid valves in accordance with a nonlinear model for proportional solenoid valves. Moreover,an inductor model for proportional solenoid valve and a calculation model for detection of movable core positions are established with the results of simulation and mathematical derivation. The availability of the calculation model is verified through practical tests as well. The experimental results show that the maximum detection error is within 10%,conforming to practical engineering application. This method is simple,practical,easy to implement,and can be used to calculate or monitor the real-time positions of proportional solenoid valves.