AC induction motor application: power train drive system

The process of building the simulation for a machine tool application can be similarly applied to a power train drive system for a passenger electric vehicle. Here the design can start with a 3-phase AC induction motor model that provides the necessary horsepower and speed to drive the vehicle. Based on the vehicle mass and wheel size, a rotational load model can be configured. Losses due to wheel bearing friction can also be included as a combination of stiction, Coulomb, and viscous friction within the Rotational Load parameters. Using the wheel size, output angular velocity for this model can be converted to vehicle linear speed.

Additional static blocks can be configured to model drag forces on the vehicle that can be fed back into the load disturbance of the Rotational Load block. Selecting a linkage ratio of 1, and using additional blocks to connect between the motor and load displacement connections can simulate a clutch and automatic transmission. Gravity induced loading can be simulated as a function of road angle and superimposed with other load disturbance inputs. The purpose of such a simulation could possibly focus on optimization of motor parameters or the development of a new method for automatic gear shifting.