Modeling And Simulation Of SRM Brake Energy Regenerative System Using In EV

Electric vehicle brake energy recovery system can recover part of the kinetic energy ofthe vehicle during braking which is a hot spot to improve the electric car continued drivingmileage. Switched reluctance motor (SRM) is a kind of special motor appeared in the1980s.it’s Simple structure, the stater and rotor made by silicon without any permanent magneticmaterials, high reliability,and low price made it widely used in the aerospace field, such as theUnited States fourth generation fighter F.35’s power supply system is constituted by theSRM.high starting torque,and low starting current made SRM suitable for electric vehicledrive motor.SRM can easy switch from drive state to the brake.fed state,and there is no needto add any auxiliary equipment，so SRM is used as drive motor in electric vehicle.SRM workprinciple is based on the minimum magneto.resistance, which makes it work in magneticsaturation flux characteristic and the relationship between flux and the rotor angle and phasecurrent size are showing strong nonlinear，that made it difficult to find analytic expressions todescribe flux characteristic relationship.that makes the modeling and analysis of SRM becomedifficult.In this article we conduct solid modeling for the SRM inANSYS. Then use finiteelement analysis to obtain a different rotor angle and phase current corresponding fluxvalues.And then made a flux characteristics of SRM.Based on the work of comparative andanalysis the electromagnetic field distribution and measurement methods, in this paper a newmethod for obtaining flux characteristics called path integral method is Proposed and verifiedby the comparison test.In the study of the traditional SRM nonlinear model we found that in traditional modelssome functions are realized by the method of writing code in modeling, which makes themodel’s poor readability, versatility is low, not conducive to the exchange of learning. OurSRM nonlinear model built in this paper based entirely on Simulink structures Overcome these shortcomings.We eliminating the need for write logic code by Simpowersystem toolboxin power converter applications.and eliminating the need for write logic code by Look.uptable module in interpolation algorithm.which made the Readability and versatility of themodel has been improved. Finally, the model was validated by Comparing the phase currentchanges.We Simulated the relationship between the braking torque and turn on and offangle,Implements a control algorithm to control the braking torque by angle. Simulated therelationship between the braking torque and Phase current,Implements a control algorithm tocontrol the braking torque by Phase current.Simulation analysis of the effect of two kinds ofcontrol algorithm on control the brake torque, and ultimately determine the motor controlscheme.In this paper we established a electric car vehicle model in MATLAB. realized the frontand rear wheels brake force distribution strategy based on the I curve.Based on the Brakingstrength statistical analysis in urban conditions we develop a braking distribution strategybetween Motor braking force and the friction braking force Finally,using the motor model andvehicle model conducted a joint simulation.Examined the effectiveness of brake forcedistribution strategies, as well as motor control Strategy in practical application.