Design, Manufacturing and Testing a Torque Stand for Electric Motors in Power and Regenerative Modes
摘要
Electric motors performance parameters can be tested with dynamometers that absorb energy using different physical principles. Installing commercial dynamometers in academic facilities used for undergraduate teaching is challenging due to the size and price of these dynamometers. Moreover, due to the variety of electric vehicle architectures and the need to teach energy efficient transportation approaches, developing lab experiments that demonstrate regenerative braking principles using electric dynamometers makes experiential learning even more challenging. The paper presents the design, building and use of a small dynamometer developed by students for experiential learning purposes in an undergraduate automotive engineering facility. The dynamometer setup can estimate the energy that could be recovered through regenerative braking and storing in a supercapacitor pack. The brainstorming activities that demonstrate the importance of collaborative learning are described. The solutions proposed by students, the engineering design approaches used to select the best engineering design, and the process of selecting components and assembling the stand are presented. Tests carried out to measure both the power produced by a 250 W in-wheel brushless DC motor and the amount of energy that can be stored in supercapacitors through regenerative braking are described.