Transient Electromagnetic Field Numerical Analysis of Self-Excited Retarder
Power generation performance of a self-excited retarder determines whether the design goal of its braking torque could be achieved. The numerical analysis of transient electromagnetic field took magnetic vector potential as variable and made six reasonable assumptions to simplify calculation. Based on above, definite solution about transient electromagnetic field and the finite element received a detailed description. The external circuit and end effect of the power generation unit were taken into account so as to improve the calculation accuracy. Let the finite element equation and external circuit equation combine to form field-circuit coupled equations and then using Crank Nicolson method established its space-time discrete model. After verification by experiment, theoretical performance of the power generation unit was basically consistent to the experimental result for a 500Nm prototype. This showed that the numerical analysis as well as the model was feasible and the power generation unit could satisfy the requirement of braking unit for excitation current.
X. J. Yang et al., "Transient Electromagnetic Field Numerical Analysis of Self-Excited Retarder", Applied Mechanics and Materials, Vols. 229-231, pp. 789-794, 2012