About Inverter DC current ripple
These ripples are produced by the chopping effect of inverter switches, causing the DC-link current to fluctuate around the required average current, consequently requiring a large DC-link capacitor [11].
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About Inverter DC current ripple video introduction
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6 FAQs about [Inverter DC current ripple]
Does DC-link voltage ripple affect inverter performance?
Inverter's performance and operating mode may be negatively affected by inverter input (dc-link) current and voltage ripple.
What is a DC-link current ripple?
Quantification of DC-Link Current Ripple As discussed in Section 2.3, the actual DC-link current, comprised of multiple sinusoids truncated periodically due to vector switching, contains significant ripples around the mean.
What is the difference between DC-link current and voltage ripples?
It can be found that the dc-link current and voltage ripples consist of not only high frequency harmonics but also the double fundamental frequency harmonic, and the voltage ripple is independent of the positive-sequence component and determined by the negative-sequence component, under the unbalanced load.
Does a DC-link capacitor have a current ripple?
The analytical expression for the current stress on the dc-link capacitor and the experimental verification has been presented in for a three-phase converter system. Based on the Fourier analysis and considering the three-phase balanced load, the dc-link current ripple characteristics have been investigated in [14, 15, 16].
Does diode reverse recovery affect DC-link current and voltage ripples?
In this paper, a proposed method is developed by consider-ing the inverter antiparallel diode reverse recovery to analyze the dc-link current and voltage ripples, and the impact of diode reverse recovery on the current and voltage ripples is evalu-ated.
What happens if DC-link voltage ripples?
The dc-link voltage ripple can lead to an increase in electric losses, an excessive rise of the motor temperature, the appearance of the torque pulsation etc. . In general, a large dc-link capacitor can significantly reduce the voltage ripple, and smooth dc-link voltage can be obtained.