An A-C Individual Wheel Drive System for Land Vehicles 660134
A fully operative test bed vehicle that has been built and tested demonstrates the a-c electric wheel drive concept. The tractive power for the 2-1/2 ton, 6 × 6 vehicle is provided by six 3-phase, squirrel-cage induction motors operated in a closed loop, controlled slip mode. The basic concept of motor operation in conjunction with a cyclo-converter type of frequency changer is discussed. The drive system provides an infinite range automatic transmission with individual wheel controls, which enhances mobility and improves performance of over-the-road, off-the-road, and trail vehicles.