Abstract
This thesis develops an electric vehicle (EV) interior permanent-magnet synchronous motor (IPMSM) drive equipped with supercapacitor (SC) energy storage and photovoltaic (PV) energy harvesting devices. The boosted DC-link voltage is established from the battery set via an interleaved boost-buck DC/DC converter. As to the SC, it is interfaced to the DC-link using a unidirectional buck DC/DC converter and connected to the battery set through a power diode. During regenerative braking, the stored kinetic energy is first recovered to the SC, and then charged the battery set. Conversely, the SC can discharge its stored energy to assist the accelerative driving. Through proper schematic and control scheme designs, the established standard EV IPMSM drive possesses good driving performance, including starting, acceleration/deceleration, reversible and regenerative braking operation characteristics. Moreover, an improved high-frequency signal injection (HFI) position sensorless control method is proposed to let the sensorless EV IPMSM drive preserve the performances comparable to those of standard IPMSM drive. The varied injection frequency of HFI scheme is proposed to avoid the back-EMF harmonic effects possessed by IPMSM. In idle condition, the developed PMSM drive can perform G2V and V2H operations with the integrated schematics being formed using the embedded components in the EV IPMSM drive. In G2V operation, good battery charging performance and line drawn power quality are obtained. As to the V2H operation, by applying the differential mode (DM) and common mode (CM) control approaches, the 220V/110V 60Hz AC output voltages with good waveform quality are generated from the battery by the established single-phase three-wire (1P3W) inverter to power home appliances. Finally, the exploration of V2G operation control using the established 1P3W inverter is made. And its feasibility and operation characteristics are verified by simulation.