Study On Theory And Test Of Urban Rail Vehicle Braking Energy Recovery Rate

In recent years, domestic and foreign researchers have done research mostly aroundthe regenerative braking, seldom involves rheostatic braking bring problems, in order tosolve this problem, this paper puts forward a new way to recovery braking energy beforeresistance braking.Through the analysis of the operational features of the vehicle， the chopper typecurrent transformer structure characteristics and the control method of the research and theenergy storage component characteristics, combined with the operation externalcharacteristic of urban rail vehicle system drive and the characteristics of the inverter,established coupling energy recovery efficiency mathematical model. After motor tractioncontrol strategy selected, and then according to the mathematical model, then useMATLAB/SIMULINK establish the vehicle braking resistance absorption energy modeland braking energy recovery system model, change the rotational inertia of the motorrespectively, it can concluded the braking energy and recycling energy of three differentbraking conditions brake, and to draw three kind of braking conditions braking energyrecovery efficiency. The experimental system of each equipment check Settings, and setrespectively traction operation curve and mode of operation, change and traction motor ofmesh flywheel number, respectively measured three conditions braking energy andrecycling energy, therefore, get braking energy recovery rate.Through the braking energy recovery rate of the theoretical and experimental studyconcluded that: recovery energy before the resistance braking is very necessary, if thetechnology is used in the subway, it may not only save a lot of energy but also improve thetemperature of the problem that resistance braking brought.