This paper presents the analysis of the DC-link voltage switching ripple in five-phase PWM voltage source inverters with balanced load. The analysis is particularly important for the design and selection of a DC-link capacitor making it possible to meet desired electrical performance of the inverter system. Simple and practical equation for designing the DC-link capacitor is proposed relating the value of capacitance to the maximum value (peak-to-peak) of the DC-link voltage ripple. The amplitude of the DC-link voltage switching ripple is analytically derived as a function of modulation index, and the amplitude of the output current and phase angle. In order to show peak-to-peak voltage ripple distribution, different diagrams are introduced. Reference is made to continuous symmetric centred PWM modulation (i.e., space vector modulation SVM). In order to verify proposed developments, simulations have been carried out by Matlab/Simulink considering full range of modulation index and output phase angle.
Evaluation of DC-link voltage ripple in five-phase PWM voltage source inverters
2019-01-01
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
invertor , maximum power point tracker , power system control , PWM power convertor , battery storage plant , electric current control , capacitor , switching convertor , PWM invertor , DC-link voltage ripple , five-phase PWM voltage source inverter , DC-link capacitor , DC-link voltage switching ripple , peak-to-peak voltage ripple distribution , continuous symmetric centred PWM modulation
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