Abstract
Wheel steams of an electric rolling stock are drive in rotation by traction engines which are placed in traction carts. Individual traction drive at which each wheel pair is drive in rotation by the traction engine has received wide application. In this drive the district speeds of wheels of wheel pairs appear different. It is necessary to create the control system of traction engines excluding their mismatch that is extremely difficult problem. Other variant of the decision of a problem consists in that the tooth gearing from the engine to wheel pair had the operated adjustable transfer ratio. Now under the patent of Kazakhstan it is developed the motor-wheel with an adaptive tooth gearing. Adaptive motor-wheel does not demand control system use. The use of adaptive motors-wheels will allow completely eliminating of mismatch of traction efforts of engines and sliding of wheels.