Bidirectional Quadratic Converter-Based PMBLDC Motor Drive for LEV Application

Mukesh Kumar,Kalpana Chaudhary,R K Saket,Baseem Khan,Hamdy Soltan

doi:10.1155/2022/5984969

Abstract

In this study, a bidirectional DC-to-DC quadratic converter (BDQC) is designed and developed for the motoring and regenerative braking (RB) of a permanent magnet brushless DC (PMBLDC) motor for a light electric vehicle (LEV) application. A PMBLDC motor is deemed more suitable for an electric vehicle (EV) due to its high efficiency and torque density. In the present work, a BDQC of 1 kW is designed to drive a 1.1 HP PMBLDC motor through a conventional voltage source inverter (VSI). An EV’s load cycle is emulated using a highly inertial load driven by a PMBLDC motor during the converter’s boost mode operation. RB is a crucial factor in extending the driving range of EVs by efficiently utilizing battery power. The converter operates in buck mode during RB, and simultaneously, the back electromotive force (EMF) of the PMBLDC machine is boosted by the self-inductance of the PMBLDC motor and the VSI. The braking technique used in this work eliminates the traditional drawback of RB in buck mode, as the power is extracted even when the motor’s back EMF is lower than the battery’s voltage. The control strategy has been implemented using the TMS320F28335 DSP controller for a developed converter prototype of the converter and driving the PMBLDC motor. The experimental results are compared to the simulation results, and a good alignment has been found.

Highlights

In recent years, electric vehicles (EVs) have drawn more attention as a substitute for conventional internal combustion engine (ICE) vehicles
With the advancement of batteries and motors, EVs have become an optimistic substitute for ICE vehicles
To improve the drivetrain’s efficiency, research on bidirectional DC-to-DC converters (BDCs) for EV applications has been extensively done [1,2,3,4,5]. e problem with these BDCs is that they have a large number of component requirements and high voltage stress on the switches. e leakage inductance of the transformer causes high voltage stress on the switches

Summary

Introduction

Electric vehicles (EVs) have drawn more attention as a substitute for conventional internal combustion engine (ICE) vehicles. (i) An efficient regenerative technique with the help of the self-inductance of the PMBLDC motor is presented (ii) An optimum switching technique is employed for operating the converter at reduced switching losses (iii) A back EMF boosting technique is used to extract power even at low motor speed (iv) e developed system’s designing, simulation, and hardware validation are performed is study describes the BDQC operation in motoring and regenerative braking modes. E switches S2 and S3 are ON for time intervals 0 to DTS, and S1 and S4 are OFF Input voltage (Vi) Output power (Po) Output voltage (Vo) Operating frequency (fs)

48 V 103 W 98 V 15 kHz

Validation through Developed Prototype

Figure 22