Font Size: a A A

Research On Integrated Charger Based On Switched Reluctance Mototr For Electric Vehicles

Posted on:2019-06-16Degree:MasterType:Thesis
Country:ChinaCandidate:J C JiangFull Text:PDF
GTID:2382330551458001Subject:Control Science and Engineering
Abstract/Summary:PDF Full Text Request
With the signing of the Paris agreement,the demand for reducing C02 emissions has become increasingly significant,and electric vehicles that represent green travel will become the primary development targets for the future automobile industry.The vehicle-mounted charging system and the motor drive system of the electric vehicle are two key parts of the electric drive vehicle.The two power electronic systems operate in a time-sharing manner and can realize the multiplexing of the power converter and the passive components,not only reducing the power electronics.The volume and weight of the system can also be reduced to a certain cost.As a result,the integration technology of charging and driving has become a research hotspot.In this paper,the structure of the single-phase charging system for electric vehicles,the full-bridge power converter for the switched reluctance motor,and the topology integration technology of the two are researched.Based on the current charging standards.According to the current charging standards,a charging and driving integrated solution suitable for the commercial application of electric vehicles is proposed.The main content of this article,1.This paper analyzes the development status and related standards of electric vehicle charging system technology and electric drive system technology,and briefly describes the drive-charging topology integration technology and related applications at home and abroad.The composition of the speed regulating system of the switched reluctance motor is introduced,and the working principle and the electrical equation of the switched reluctance motor are analyzed.2.By analyzing and contrasting the power converter of the SRM system,this paper presents a novel charging topology based on switched reluctance motor integrated converter.In this converter,a relay is added to the bus of the traditional three-phase full-bridge converter by multiplexing power converters and passive components,and a novel converter topology is reconstructed.This topology can realize the speed regulation function of electric vehicles.And charging function.During the charging process,the motor windings are multiplexed to boost inductors and the converter power switches are controlled to charge.No additional charging facilities are required.The front-end is reconfigured as a bridge-less step-up power factor correction(PFC)converter and a back-end cascaded Buck-Boost converter;energy flow in both directions can be achieved at the same time.3.Design corresponding control strategies for the working status of the integrated system.For the charging mode,the mathematic model of the open-winding switched reluctance motor is analyzed.According to the problem of the bridgeless Boost PFC under high power conditions,a smooth transition control switching strategy is proposed and the loss switching point is analyzed.To reduce the charging efficiency due to rotor rotation in V2G mode,a zero-torque control is proposed to achieve zero torque control of the motor under non-governed conditions.Simulation results verify the effectiveness of the scheme.4.A hardware experimental platform for the drive control of the SRM integrated system was set up.The proposed topology was hardware-designed,and the motor drive current chopping control experiment was conducted to verify the feasibility of the motor control strategy.
Keywords/Search Tags:Electric Vehicle, Power Factor Correction, Switched Reluctance Motor, Zero Torque Control, Converter
PDF Full Text Request
Related items