Design Of Air Compresdor Test System For Fuel Cell Vehicle

An air compressor,or air compressor,is a widely used air compression device.There are many types of air compressors.Large air compressors can be used as marine diesel engines for start-up,wind-driven experiments,blasting coal mining,etc.Small air compressors can be used for vehicle braking and instrument control.In fuel cell systems,air compressors are also required as components to transport high-pressure oxygen.The fuel cell system has high requirements for the stability of the flow of oxygen during the operation.Therefore,the performance of the air compressor determines the quality of the entire fuel cell system.As an important component of a fuel cell system,performance data needs to be collected and analyzed during the development of the air compressor to optimize the stability and reliability of the air compressor.The development of air compressor testing technology started late,and relevant test standards for fuel cell air compressors have not been formulated.Therefore,the measurement and control experiments of air compressors by various manufacturers are still in the exploration stage,and the performance indicators of air compressors are only compared to product requirements,there is no specification.In the process of data collection,there are problems such as low test accuracy,unscientific experimental methods,and excessive test costs.This article optimizes the design of the fuel cell air compressor test system,which can meet the test needs of air compressor products,improve the accuracy of data collection,simplify the operation of testers,and have the following features in the development of various types of air compressor products.This article applies the virtual instrument testing technology to the fuel cell air compressor test system,and makes a more complete design and implementation of the hardware system and software system.In the hardware system,according to the performance parameters of the r oots air compressor,the design including the cooling water circuit and the air circuit,the selection of the sensor,and the definition of the test requirements are made,and the air compressor flow,gas temperature,cooling water temperature,and motor speed are defined.Air compressor speed and other parameters to collect targets.At the software level,a set of virtual instrument test system based on Lab VIEW software is written,which can realize human-computer interaction,data acquisition,fault alarm,data storage and other functions.It can also be used as a host computer for air compressor testing that can be developed twice.The system has certain significance for the subsequent development of testing technology for air compressors for fuel cell vehicles.This article uses the CAN bus technology as a communication standard to connect the hardware system and the host computer.It provides a new idea for the development of virtual instrument technology,which not only reduces the development cost,but also can be combined with other development software in data analysis.The process is no longer limited.Finally,the principal component analysis method and the BP neural network toolbox in MATLAB are used to analyze and predict the test data.The training results are basically consistent with the actual situation.The MATLAB script block diagram in Lab VIEW is used to implement the interaction between Lab VIEW and MATLAB.It has certain reference value for the fault diagnosis of air compressor and perfects the function of air compressor test system.