1,721,051 research outputs found
DSP-based predictive current control technique for a permanent-magnet synchronous motor using a resonant DC link inverter
No full textA predictive current control technique for a permanent magnet synchronous motor (PMSM) employing a resonant DC link inverter is proposed to overcome the disadvantage of the current regulated delta modulation (CRDM) control technique. Also, the discrete model of a PM synchronous motor and estimation of back EMF are investigated. Based on this discrete model and estimated back EMF, a predictive current control technique is newly developed. Using the proposed control technique, the minimized current ripple with a small number of switchings can be obtained. Finally, the comparative computer simulation and experimental results are given to show the usefulness of the proposed technique
Mathematical interpretation of practical sampler in current mode control
No full textThe mathematical interpretation of a practical sampler which is useful to obtain small signal models for peak and average current mode controls is proposed. Due to difficulties in applying Shannon's sampling theorem to the analysis of sampling effects embedded in the current mode control, several different approaches have been reported. However, these approaches require information about the inductor current in a discrete expression, which restricts the application of the reported methods to peak current mode control. In this paper, mathematical expressions of sampling effects on a current loop to which Shannon's sampling theorem can be directly applied are newly proposed, and are applied to the modelling of peak current mode control. From newly derived models of a practical sampler, models in a discrete time domain and a continuous time domain are obtained. It is expected that the derived models are useful for the control loop design of power supplies. The effectiveness of the derived models are verified through the simulation and experimental results
Fabrication of MEA for the Polymer Electrolyte Membrane Fuel Cell using the Membrane on Electrode (MOE) Technique
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