2006 Volume 36 Pages 23-28
A Direct Drive (DD) type motor that has a low-speed and high-torque specifications is suitable for the driving motor of a small electric vehicle (EV). We have developed a driving motor system for an energy-saving race EV by modifying a commercial outer rotor type brushless DC motor into a low-voltage-type one. This system has an electric regenerative energy circuit using quick-charging electric double-layer capacitors (EDLC). An energy-saving EV race called the "World EV Challenge in SUGO" is held every year in Sugo (Miyagi, Japan). We participated in the EV race to evaluate the performance of this driving motor system and examined the actual running data with simulation results calculated using an equivalent electric circuit of the EV system.
