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This paper extends the impedance-source (Z-source) inverters concept to the transformer based Z-source (trans-Z-source) inverters. The original Z-source inverter (ZSI) employs an impedance network of two inductors and two capacitors connected in a special arrangement to interface the dc source and the inverter bridge. It has overcome the conceptual limitations of the traditional voltage-source inverter...
Multilevel converters and inverters have become the enabling power conversion technology for high voltage high power applications in today's power systems and large motor drives. Although the neutral-point clamped (NPC, a 3-level) inverter was invented in 1979, the multilevel concept was not formally established until the early 1990s when the diode-clamped multilevel inverter, the capacitor-clamped...
The design of a 55 kW 3X dc-dc converter is presented for hybrid electric vehicle (HEV) traction drives. It can interface the battery with the inverter dc bus with three output/input voltage ratios and have smooth transition in voltage ratio changes. By making use of the parasitic inductance, the size and weight of the converter are significantly reduced. Its magnetic-less feature and high efficiency...
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