[Back]


Publications in Scientific Journals:

M. Hartmann, S. Round, H. Ertl, J.W. Kolar:
"Digital Current Controller for a 1 MHz, 10 kW Three-Phase VIENNA Rectifier";
IEEE Transactions on Power Electronics, 24 (2009), 11; 2496 - 2508.



English abstract:
Active three-phase rectifiers operated at switching
frequencies of 500 kHz and above, in order to increase their power
density, require high-speed current controllers. If these current
controllers are implemented purely digitally, which is well established
today for 20-200 kHz converter systems, then very high
numerical data processing demands result. In this paper, two different
types of field-programmable gate arrays (FPGAs) are evaluated
for realizing high-speed converter current control. For the
implementation of such controllers, not only the FPGA has to be
considered but rather the entire signal chain. Two alternative A/D
interfaces (including high-speed low-voltage differential signaling
data transmission) that are able to handle data sampling rates up
to 25 MSa/s are verified. Subsequently, a digital current controller
is designed and it is shown how hardware multiplier blocks ofmodern
FPGAs can be used advantageously. Furthermore, the FPGA
implementation of high-resolution pulsewidth modulation providing
symmetrical pulse patterns for high switching frequencies is
described. Measurements taken from a 10 kW VIENNA rectifier
laboratory prototype finally demonstrate the high performance of
the proposed control concept and show that a low mains current total
harmonic distortion of 1.4% can be achieved for such ultrahigh
switching frequency converters.


"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1109/TPEL.2009.2031437

Electronic version of the publication:
http://publik.tuwien.ac.at/files/PubDat_186987.pdf


Created from the Publication Database of the Vienna University of Technology.