LC Filter Design for Wide Band Gap Device Based Adjustable Speed Drives

Casper Vadstrup, Xiongfei Wang, Frede Blaabjerg

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4 Citationer (Scopus)

Abstrakt

This paper presents a simple design procedure for LC filters used in wide band gap device based adjustable speed drives. Wide band gap devices offer fast turn-on and turn-off times, thus producing high dV/dt into the motor terminals. The high dV/dt can be harmful for the motor windings and bearings and must therefore be reduced. This may be accomplished by a sine LC filter with DC link feedback, which reduces both the differential mode and common mode dV/dt. Wide band gap devices are capable of switching at frequencies much higher than traditional Si based devices. This makes it possible to design the LC filter with a higher cut off frequency and without damping resistors. The selection of inductance and capacitance is chosen based on capacitor voltage ripple and current ripple. The filter adds a base load to the inverter, which increases the inverter losses. It is shown how the modulation index affects the capacitor capacitor and the inverter current.
OriginalsprogEngelsk
TitelProceedings of the IEEE International Power Electronics and Application Conference and Exposition (IEEE PEAC'14)
Antal sider6
ForlagIEEE Press
Publikationsdatonov. 2014
Sider1291-1296
DOI
StatusUdgivet - nov. 2014
BegivenhedIEEE International Power Electronics and Application Conference and Exposition (IEEE PEAC'14) - Shanghai, Kina
Varighed: 5 nov. 20148 nov. 2014

Konference

KonferenceIEEE International Power Electronics and Application Conference and Exposition (IEEE PEAC'14)
LandKina
ByShanghai
Periode05/11/201408/11/2014

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