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Switched Linear Induction Motor Freeway System Data
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English
Abstract
A hybrid conventional drive/electric car has been built that does not use batteries, a motor, or controls. In the purely electric mode, it is pulled by an independently suspended tractor plate that is lowered to within 5/16ths of an inch of a set of buried, switched, linear induction motors. These motors are turned on when the vehicle is approaching, and operate with pulse population modulation at a speed commanded by the driver through an infrared link connected to a computer. Prototype speeds of 38.62 km/h for a 906 kg vehicle are contemplated. The motors ultimately can provide speeds necessary for freeway driving, but also must be able to bear the vertical loads associated with lane-changing and non-compatible traffic rolling over the motors.
The top level system requirements are discussed in a general manner. Pictures of the motor, tractor, and vehicle, etc. are shown. Figures are presented of the force requirements, material sensitivity, motor slip characteristics, 3-D motor force characteristics, gap characteristics, and power verses force characteristics. Electromagnetic field measurements inside the car are discussed. Although far from production, this full size prototype shows a radical approach to solving the well known problems associated with battery driven electric vehicles.
Authors
Citation
Ulbrich, E., "Switched Linear Induction Motor Freeway System Data," SAE Technical Paper 931799, 1993, https://doi.org/10.4271/931799.Also In
Electric Vehicle Power Systems: Hybrids, Batteries Fuel Cells
Number: SP-0984; Published: 1993-08-01
Number: SP-0984; Published: 1993-08-01
References
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