Lower battery voltage enhances electric vehicle safety. A homopolar traction motor operates at low voltage because of its low internal impedance, and delivers torque independent of speed. A 48 VDC multi-pass, iron core homopolar traction motor was designed, fabricated, and tested in the laboratory. A MOSFET pulse width modulated controller was also designed and tested. The motor weighed 227 kg and used solid copper-graphite brushes. Laboratory testing of the motor verified the current-torque characteristic, but high brush wear prevented full speed and power demonstration. System studies show that a hybrid Ward-Leonard drive using a similar motor could yield significant cost and weight savings and improved fault tolerance over a traditional EV architecture.
Prototype Low Voltage Homopolar Traction Motor
Sae Technical Papers
Future Car Congress ; 2002
2002-06-03
Aufsatz (Konferenz)
Englisch
Batteries , Iron , Traction , Electric vehicles , Architecture , Wear
Prototype low voltage homopolar traction motor
Kraftfahrwesen | 2002
|Homopolar Voltage of an Asynchronous Electric Motor
British Library Conference Proceedings | 1991
|Homopolar motor technology development
Tema Archiv | 2002
|HYPERSONIC AIRCRAFT HAVING HOMOPOLAR MOTOR WITH GRADED RESISTANCE
Europäisches Patentamt | 2019
|