Dual Motor Power Sharing Control for Electric Vehicles With Battery Power Management

Abstract

Induction motor powertrains are emerging as a cost-effective option for high-power electric vehicles (EVs). A differential four-wheel drive (D4WD) EV based on two open end winding induction motor (OEWIM) propulsion is presented in this paper. Each OEWIM is driven by two 2-level voltage source inverters (VSI) with two isolated battery packs as the source. The proposed drive control algorithm integrates the uniform state-of-charge (SoC) distribution and fault-tolerant operation. A two-stage lookup table (LUT) based direct torque control (DTC) scheme is proposed to balance the SoC of batteries by selecting the suitable redundant VSI voltage vectors. The proposed LUT-DTC scheme is less sensitive to variations in motor parameters and provides excellent steady-state and transient performance. The results show the superiority of the proposed controller in terms of battery SoC balancing. The performance of the EV drive with the proposed LUT-DTC is validated by both simulation and laboratory experiments for the FTP75 and HFET driving cycles under different operating modes under normal and fault conditions. The dual motor driven D4WD with the proposed LUT-DTC is found to achieve 89.2% efficiency.

A Novel Intelligent Controller-Based Power Management System With Instantaneous Reference Current in Hybrid Energy-Fed Electric Vehicle

“…The slope between power and current is known to be the [dP/dI], which is expressed in the Eq. (10). The range of the Φ is between the -90° to 90°.…”

“…Vehicle propulsion is achieved by two sets of batteries and motors for the front and back wheels. Control methodology creates complexity due to two inverters controlling the induction motor load and this EV system depends on the grid for charging the battery [10]. The energy management process is executed using a robust optimisation method, where the authors considered uncertainty in the cost function and compared the work with other optimisation methods.…”