2021 Bachelor's degree Graduation Project, Battery Electric Vehicle
Department of Electrical and Conputer Engineering, Seoul National University
- Advisor : Professor Seung-ki Sul
- Path length : 4.06Km
- Maximum slope : 7%
- Maximum speed : 30.5km/h
- place : Seoul National University Electric Power Research Institute Parking Lot
- settled down at 44 celcius degree
- continuous maximum q-axis current (30A)
- 4 layer PCB artwork (1oz 2oz 2oz 1oz)
- Used IPM(NFAL5065L4B) as the power IGBT switch
- Electrically isolated control board area from the High Power Area including IPM and DC link
- TMS320F2839D Launchpad
- Built the q-axis current regulator(PI controller with feedforward) from the scratch including resgister setting(ePWM, eCAP, GPIO, Clock, Timer)
- Implemented rotor position and speed observer to estimate right position of rotor for DQ transformation and feedforward control
- Robust control algorithm to prevent sudden current peak from the disturbance.
Since there is no mechanical damper between ground and motor wheel, Bumpy road surface directly affects the controller's performance - Hall sensor type curernt sensor removal. because the IPM already provides extra ports to measure the phase current using small register.