Abstract
This thesis presents the establishment of a battery/super-capacitor powered electric vehicle (EV) switched-reluctance motor (SRM) drive with grid-to-vehicle (G2V), vehicle-to-home (V2H), vehicle-to-grid (V2G) and plug-in energy harvesting functions. All these auxiliary functions are conducted with the converters formed using the SRM drive embedded components. The developed SRM drive is powered from the battery via an interleaved unidirectional buck-boost DC/DC converter. Good driving performances are achieved via properly treating some affairs, including commutation instant setting and shifting, improved current and speed controls, DC-link voltage adjustment, etc. Thanks to the developed interface converter, the DC-link voltage can be flexibly controlled to below and above the battery voltage. The successful generative braking is accomplished via proper commutation setting. A dynamic brake leg is also equipped to avoid the DC-link overvoltage as the regenerative braking is failed. Satisfactory driving performances possessed by the developed SRM drive include acceleration/deceleration, reversible and regenerative braking operations. To obtain better overall storage utilization of an EV, the battery is augmented with the power type super-capacitor (SC) storage. The SC is also interfaced to the DC-link via a bidirectional buck-boost/buck-boost (B-B/B-B) DC/DC converter. Through proper coordinated control arrangement, the energy conversions during intermittent and frequent short-duration acceleration/deceleration can be quickly handled by the SC. This is beneficial for increasing the battery life. In EV idle condition, a bilateral single-phase three-wire (1P3W) inverter is constructed using the embedded motor drive power devices. The inverter can be arranged to perform G2V and V2H/V2G operations. In G2V mode, the EV battery can be charged from the mains with power factor correction. Conversely, in V2H/V2G modes, the home appliances can be powered with 110V/220V voltages from the on-board battery. Moreover the programmed power can be sent back to the utility grid. In grid-connected cases, all load reactive and harmonic powers can be compensated by the battery powered inverter. Finally, an externally added on-board three-phase Vienna SMR is established. It allows the quick on-board charging from three-phase AC mains. The possible plug-in harvested sources include three-phase AC source, single-phase AC source, or DC source.