Abstract
This thesis develops an electric vehicle position sensorless interior permanent-magnet synchronous motor (IPMSM) drive powered by battery/supercapacitor (SC) having good driving and regenerative braking performances. In idle condition, it possesses grid-to-vehicle (G2V), vehicle-to-home (V2H) and vehicle-to-grid (V2G) capabilities using the embedded motor drive components. Moreover, an energy harvesting system is equipped to allow the energy support from the AC source and photovoltaic (PV). The battery and SC are respectively interfaced to the motor drive DC-link via an interleaved and a standard bidirectional DC/DC converters. The SC can assist the motor in acceleration and store the recovered regenerative braking energy and transfer to the battery. The high-frequency injection (HFI) based sensorless control technique with varied injection frequencies is proposed to avoid the back-EMF harmonic effects possessed by an IPMSM. Through proper control, good driving operation characteristics are preserved, including acceleration/deceleration, reversible and regenerative braking operations. In addition, the experimental comparative driving performance evaluation to the standard EV IPMSM drive is also conducted. In G2V operation, an on-board switch mode rectifier (SMR) based charger is formed to yield good battery charging performance with satisfactory line drawn power quality. As to the V2H/V2G operations, the 220V/110V 60Hz AC output voltages with good waveform quality are generated from the developed single-phase three-wire (1P3W) inverter to power home appliances for reducing the energy drawn from the mains, and even send the preset power back to the mains. For the developed energy harvesting system, the harvested PV energy can directly charge the battery under road driving condition. In idle case, both PV and single-phase AC source can be arranged to charge the battery using the schematic formed by the motor drive embedded circuit components.