Chassis dynamometer for electric and hybrid vehicles

Chassis dynamometer for testing electric and hybrid vehicles with an engine power of up to 14 [kW], a maximum weight of 1200 [kg] and a maximum speed of 90 [km / h]. The chassis dynamometer is mainly used to simulate different road conditions within a controlled environment, and is used for a wide variety of vehicle testing and development purposes (for example: determining operational parameters and the battery wear level under specific driving patterns).\nThe dynamometer consists of the following main elements:\n1. Electric brake in the form of a standard DC generator with a rated power [11kW] at a rotational speed of 1550 [rpm] and a voltage of 440 [V].\n2. Eurotherm Drives 590 controller (power supply), which enables motor and generator operation (with energy return to the network) of a DC machine, simulation of vehicle inertia on the electric route and cooperation with a host computer via RS 422 serial bus.\n3. Inertia brake.\n4. A set of rollers with a diameter of 400 mm made of a steel pipe.\n5. Welded frame made of steel sections.\nThe drive was transferred using toothed belts.\nRemarks: torque cannot be measured, usually as a feedback signal in the chassis dynamometer control system. In this situation, it was assumed that the torque calculated by the master computer based on the static characteristics of the dynamometer determined during identification tests.