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Laboratory Stand for Research of Energy Characteristics of Electric Vehicle Drives

This work is devoted to the study of the energy characteristics of a vehicle electric drive. A stand has been developed makes it possible to measure the electrical power consumed by a variable-frequency drive, while varying the rotational speed of the motor shaft and the torque generated by it. On the ground of the data obtained using the stand, a family of curves was constructed that describe the dependence of the efficiency on the torque at a fixed rotating frequency. The analysis of the obtained dependencies showed the presence of maxima, which provide a basis for finding the minimum energy consumption during acceleration by varying the gearbox ratio.