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To solve the problems of torque ripple and in constant switch frequency of inverter in the conventional direct torque control (DTC), a novel DTC method using space vector pulse width modulation (SVM) is proposed based on analysis of permanent magnet synchronous motor (PMSM) mathematical model, where hysteresis controller is substituted by PI controller and switch table is substituted by SVM. In order...
To solve the problems of torque ripple and inconstant switch frequency of inverter in the conventional direct torque control (DTC) for permanent magnet synchronous motor (PMSM) drive, a novel DTC method using space vector pulse width modulation (SVM) is proposed based on analysis of PMSM mathematical model. In this novel DTC system of PMSM , traditional torque hysteresis controller and flux hysteresis...
The problem of controlling the power spectral density (PSD) of random modulation techniques has attracted considerable interest recently in power electronics field. In this paper we analyze the PSD of DC/DC converter that uses randomized switching frequency pulse width modulation with constant duty cycle. We give a novel understanding for the peaks visible in the PSD. Based on the analysis we derive...
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