> Working on high-power traction inverters for electric vehicles: sourcing, trouble-shooting, IGBT thermal analysis & temperature calibration.> Developing a 800V traction inverter hardware.

1) Proposed a new five-level inverter, which can reduce cost for medium voltage high power (3.3kV 1MW) motor drives, verified with a 3kW hardware prototype.2) Developed a simple and robust speed sensorless control algorithm for synchronous generators in wind power systems, verified with a 3kW PMSG system.3) Designed a three-port isolated DC/DC converter for EV charging stations. A 600V 5kW hardware prototype was built with a power density of 2.74 kW/L and an efficiency of 97%.4) Designed a single-stage isolated AC/DC converter to interface between AC and DC grids. The proposed converter allows bidirectional power flow, which can be used in battery storage systems.5) Proposed a modular isolated AC/DC structure for EV charging stations that can connect directly to medium voltage AC (over 3.3kV) grids without low frequency (50/60Hz) transformers.6) Designed a 380V 10kW smart inverter for an industrial project. The inverter can detect open circuit faults in less than 50ms.

1) Designed, and controlled successfully a high efficiency (96%) 380V 10kW three-phase grid-tied system using three-level TNPC topology. The system was used to convert and inject the power of PV solar panels into the main grid.2) Developed a website platform to monitor power and working conditions of electrical systems, using Zigbee and Ethernet protocol.3) Designed a 220V 5hp inverter to control AC synchronous motors; applied motor speed and position control algorithms.4) Designed a 50W flyback power supply and a 150W push-pull converter.