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Accurate Analytical Calculation of the DC-link Capacitor Current for Three-phase Motor Drive under the Full Working Range | IEEE Conference Publication | IEEE Xplore

Accurate Analytical Calculation of the DC-link Capacitor Current for Three-phase Motor Drive under the Full Working Range


Abstract:

The dc-link current is an important indicator for the design and selection of dc-link capacitors for voltage source inverter (VSI). The traditional dc-link current analys...Show More

Abstract:

The dc-link current is an important indicator for the design and selection of dc-link capacitors for voltage source inverter (VSI). The traditional dc-link current analysis for two-level three-phase VSI based motor drive only considers ac fundamental phase current and neglect the ac high-frequency current ripple caused by the pulse width modulation (PWM) process. Thus, this paper introduces an accurate analytical method of the dc-link capacitor current by taking the real-time ac high-frequency current ripple into consideration. Moreover, the accurate calculation of rms current on the dc-link capacitor has been provided with the traditional PWM methods, and the time-domain comparison of dc-link current has been studied under the wide range of adjusting speed and power factor. Simulation and experimental results are both provided to validate the accuracy of the proposed method.
Date of Conference: 17-20 October 2022
Date Added to IEEE Xplore: 09 December 2022
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Conference Location: Brussels, Belgium

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