| Abstract |
To improve the line and/or load side characteristics of medium to high power converters, it is
desirable to increase their switching frequency. Additionally, it is advantageous to have a low dv/dt at
the output voltages, especially when a motor is connected via a long cable to the inverter.
Resonant converters claim to fulfil both items, because lower switching losses in the semiconductors
should allow higher switching frequencies and the output voltage is shaped by the resonant operation.
A lot of resonant topologies have been proposed, the Resonant Pole topology seems to be interesting
for high power applications. In the range of medium power, which is the topic of this paper, the
PWM-operated Resonant DC-Voltage Link Inverters may be favourable because they consist of
clearly less individual parts. In this paper, the advantages and drawbacks of three different topologies
are shown by analysing simulation results.
An experimental set-up for one of the investigated inverters is under construction which will be used
to examine the voltage and current stresses and the power dissipation of the active and passive
components. |
