Abstract
This thesis develops an electric vehicle (EV) interior permanent magnet synchronous motor (IPMSM) drive with grid-to-vehicle (G2V)/vehicle-to-home (V2H)/vehicle-to-grid (V2G) and energy harvesting capabilities. The motor drive is powered from the battery via an H-bridge DC/DC converter. In addition to bidirectional power flow, the DC-link voltage can be varied below or above the battery voltage in wide speed range. The SC is interfaced to the DC-link through a one-leg bidirectional boost/buck DC/DC converter. Through proper voltage window profiling, the SC can quickly discharge energy to assist the motor rapid acceleration and store the recovered regenerative braking energy. To explore the potential of sensorless controlled motor in EV driving application, a high-frequency injection (HFI) position sensorless controlled EV IPMSM drive with changed injection frequencies is developed to reduce the inherent back-EMF harmonic effects. The comparative evaluation indicates that good driving performances are preserved for both the established standard and sensorless controlled motor drives, including acceleration/deceleration, reversible and regenerative braking operations. In idle condition, G2V/V2H/V2G operations can be conducted using the embedded motor drive components. In G2V operation, the on-board single-phase or three-phase switch-mode rectifier (SMR) based charger is formed to perform battery charging from utility grid with power factor correction. Conversely in V2H/V2G discharging operations, the on-board battery can discharge stored energy to home appliances or grid via the developed single-phase three-wire (1P3W) inverter. Good AC voltage waveforms under unknown and nonlinear loads are obtained by the proposed control schemes. As to the established energy harvesting scheme, the EV roof PV can directly charge the battery in any conditions. In idle case, the house roof PV, the accessible DC source or single-phase AC source can charge the battery via the constructed bridgeless boost SMR.