1. dc-ac cascaded H-bridge multilevel boost inverter with no inductors for electric/hybrid electric vehicle applications
- Author
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Du, Zhong, Ozpineci, Burak, Tolbert, Leon M., and Chiasson, John N.
- Subjects
Electric inverters -- Usage ,Electric vehicles -- Equipment and supplies ,Electric vehicles -- Analysis ,Business ,Computers ,Electronics ,Electronics and electrical industries - Abstract
This paper presents a cascaded H-bridge multilevel boost inverter for electric vehicle (EV) and hybrid EV (HEV) applications implemented without the use of inductors. Currently available power inverter systems for HEVs use a dc-dc boost converter to boost the battery voltage for a traditional three-phase inverter. The present HEV traction drive inverters have low power density, are expensive, and have low efficiency because they need a bulky inductor. A cascaded H-bridge multilevel boost inverter design for EV and HEV applications implemented without the use of inductors is proposed in this paper. Traditionally, each H-bridge needs adc power supply. The proposed design uses a standard three-leg inverter (one leg for each phase) and an H-bridge in series with each inverter leg which uses a capacitor as the dc power source. A fundamental switching scheme is used to do modulation control and to produce a five-level phase voltage. Experiments show that the proposed dc-ac cascaded H-bridge multilevel boost inverter can output a boosted ac voltage without the use of inductors. Index Terms--Cascaded H-bridge multilevel boost inverter, electric vehicle (EV)/hybrid electric vehicle (HEV).
- Published
- 2009