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This paper builds a SIMULINK model about the dynamic performance of the PEMFC System based on the basic mass transport theory and electrochemistry principles. This model integrates the dynamics process of GDL and membrane. Different from other models, considering the dynamics process in the GDL, catalyst oxygen concentration is directly used to describe the concentration overpotential, which is different...
In this paper, it proposes an improved space vector modulation (SVM) based direct torque control (DTC) algorithm with modified torque controller for surface-mounted permanent magnet synchronous machines (SPMSMs). First, it introduces the conventional SVM-DTC for SPMSM and then analyzes its potential shortcomings to be overcame. Second, an improved SVM-DTC control algorithm with a modified torque controller...
This paper analyses the back pressure match and optimization using a regulated back-pressure valve (BPV) for the cathode outlet flow in a high pressure PEMFC engine. At a given power, the cathode input and output flow rate determine the cathode pressure, and consequently determine the compressor power consumption. In order to maintain a high efficiency during operation, the BPV has to be adjusted...
In this work, two different excitation/detection modes, U/L mode and L/L mode for probing an extended defect are compared and discussed. A contrast function is introduced to describe the influence of the defect. We have found that the contrast function not only depends on dimensionality of the system (1-D vs. 2-D), but also depends on the excitation/detection mode. Photoluminescence mapping data using...
MPC (Model Predictive Control) algorithm has been widely applied in the chemical process control applications. In this paper, the ASCET-MD, which is an embedded controller development tool for automotive electronics, has been used to implement the MPC algorithm for a PEM (Proton Exchange Membrane) fuel cell air supply sub-system. A concept of receding update is forwarded and realized under a real...
Voltage undershoot and non-uniform distributions are often observed when a proton exchange membrane fuel cell (PEMFC) engine operates at the acceleration or idle mode, due to inappropriate membrane water content and temperature profile. For optimizing the PEMFC vehicle performance at idle mode, a non-isothermal, electrochemical and transport fully coupled 3D model for a 10-cell PEMFC stack with coolant...
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