Abstract
Linear induction launchers have some important advantages, such as contactless operation between barrel and projectile, over the other type of launching technologies. The barrel corresponding to stator can be excited by generators or capacitor banks whose voltage and frequency might be constant or being manipulated by a power conditioner. Multilevel converter topologies for driving rotational electromechanical machines have attracted more attention for the last decades due to some of their unique benefits. Since linear induction launchers are subset of electrical machines, multilevel topologies can be applied to them as well. For this reason, a novel converter structure as a conditioner for power source unit of a linear induction launcher will be designed and implemented. The proposed power conditioner is constructed as cascaded H-bridge multilevel converter topology in which SiC MOSFETS will be preferred. Level-shifted PWM (LS-PWM) technique is chosen to create required pulses of the switching devices. Also, variable-voltage/variable-frequency (VVVF) control method is applied to drive the launcher with proposed conditioner.
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