From 0 to 100 kph in Less Than 3 Seconds: Electric Power and VAC’s Magnetic Materials

September 10, 2012 by Jeff Shepard

VACUUMSCHMELZE GmbH & Co. KG (Hanau) is a Sponsor of the University of Stuttgart's GreenTeam who compete in the Formula Student Electric racing series. VAC supplies its VACOFLUX® 50 high saturation magnetic alloy for the electric drives of the GreenTeam's race car. The 30-strong team of students recently announced their intention to attempt to break the world record with their electric racing car and promptly succeeded. Their electric vehicle with the model number E0711-3, known to the students as E3, had to accelerate from zero to 100 kilometres per hour in less than four seconds. After two test runs under the supervision of an official timekeeper, the results have been confirmed that the car achieved the required acceleration in 2.93 seconds -- a new world record. The GreenTeam's vehicle weighed in at 267 kg and was equipped with two electric motors delivering almost 140 hp of power and 1100 Nm torque. Adjusted for weight and power output, the E3 therefore outperformed any Ferrari.

VAC supplied the GreenTeam from the University of Stuttgart with two laminated stator stacks made of VACOFLUX® 50. The manufacturer of the drive and control unit, AMK, used the VACOFLUX 50 stator stacks in its high-performance version of an existing electrical steel motor to significantly enhance the power density. VACOFLUX 50 is an advanced material with a saturation magnetisation of 2.3 T and is thus vastly superior to conventional electrical steel -- particularly in the medium field strength range that is found in electric motors.

VACOFLUX 50 is typically used for high-performance, power dense motors and generators with high torque, in application areas such as aviation, automation technology and motor racing. Depending on the motor design, the use of VACOFLUX 50 can boost torque by as much as 50%.