Performance evaluation of electric vehicle brushless direct current motor with a novel high-performance control strategy with experimental implementation

Abstract

In this article, a new control strategy for electric vehicle battery autonomy and performance improvements is proposed. This method is based on the use of a DC-DC converter combined with a brushless DC motor as an electric vehicle propulsion engine. First, an analysis of the three-phase brushless DC motor performance based on analytical modeling is addressed. This model stands on the derivative of the commutated and non-commutated phase currents from which the speed response is induced. The proposed model presents different brushless DC motor pulse width modulation control modes and allows highlighting the most appropriate mode with lower current ripple and power loss, higher efficiency and faster response. Furthermore, a DC-DC boost converter is integrated in the motor control scheme, to describe after, how the electric vehicle performance is increased when implementing this control mode. Evaluation of the analytic results has been validated through simulations on MATLAB/Simulink. The evaluation focuses on speed response for different pulse width modulation control modes, current ripple rate in addition to the electric vehicle performance with and without DC-DC converter. In addition, an experimental validation using a laboratory designed platform is performed. The proposed method demonstrates a better electric vehicle performance in terms of increasing the battery autonomy and speed range.

Real Time Implementation for a Low-Cost Control for BLDC Motor Current Ripple Minimization

“…Assuming that the phase resistances are equal, the phase inductances are constant, and the switching losses are neglected, the three-phase BLDCM voltage equation and Kirchhoff's law can be expressed as (1) and (2):…”

“…Brushless DC motors (BLDCMs) are widely used due to their several advantages among which we can cite high efficiency, high power-to-volume ratio, long lifespan, low cost of maintenance, low rotor inertia, etc. [1,2]. These characteristics are mandatory for different applications such as aerospace and medical applications, in addition to electric transportation industry, where high speed, fast response and high precision position control are required.…”

Design and Analysis of a Dual Rotor Multiphase Brushless DC Motor for its Application in Electric Vehicles

“…The main advantages of the Brushless DC (BLDC) motor are its small size, the absence of rotor copper losses due to yhe absence of rotor windings, and its low maintenance cost [7]. The BLDC motor offers high efficiency, high power, and torque density, but the conventional BLDC motor topologies do not provide all the requirements for EV application [8][9][10].…”

Horizontal Alignment Security Design Theory and Application of Superhighways

“…In China, the maximum design speed of highways is 120 km/h, which first appeared in the Highway Engineering Technical Standard (Trial) in 1951 [1]. Over the past 60 plus years, vehicle performance [2], road design, and construction technology have been greatly improved [3]. The maximum design speed no longer meets the needs of reality, and developed countries have been increasing highway speed limits [4].…”