Abstract
M.Ing.
Inverters are daily used in industry, and to a large extent, as induction motor
drives. Power levels of inverters vary from a few watt to several megawatt.
The most common part of inverters is a phase arm or a pole, consisting of two
power electronic switches and two freewheeling diodes. The hard switched phase
arm is the standard in industry due to simplicity and cost. Regenerative snubbing
is often used at larger power levels to reduce losses in the inverter.
Some aspects of the non-linear resonant pole inverter, such as regenerative
snubbing and zero voltage switching, are investigated. It is obtained by utilising a
non-linear resonant tank. Low current stresses permit the optimal use of the power
electronic switches. The non-linear resonant pole inverter can replace the hard
switched inverter, with no restriction with respect to power levels.
Experimental and analytical modelling was employed to investigate some aspects,
such as controllability, losses and feasibility.