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At present multilevel converters are technically interesting due to their high power handling capabilities, low output harmonics level and reduced requirements in blocking voltages in the switching devices ratings and lower commutation stresses and losses. The multilevel converter configurations now in use have as their main disadvantage their circuit complexity, requiring a great number of power...
This paper presents a single capacitor active snubber circuit for the asymmetric inverters used to drive switched reluctance motors. The proposed configuration uses the motor coil inductance as an integral component in the snubber process, acting in sequence to ensure the low-loss commutation of each inverter main power device. The two auxiliary snubber switches naturally commutate in ZCS mode. Only...
Multilevel converters offer high power capability, associated with lower output harmonics and lower commutation losses. Their main disadvantage is their complexity, requiring a great number of power devices and passive components, and a rather complex control circuitry. This work reports a new multilevel inverter topology using an H-bridge output stage with a bidirectional auxiliary switch. The new...
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