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Comparison between two models of BLDC motor, simulation and data acquisition

  • Rodrigo Y. Yamashita
  • Fabrício L. Silva
  • Fabio M. Santiciolli
  • Jony J. Eckert
  • Franco G. Dedini
  • Ludmila C. A. Silva
Technical Paper
  • 131 Downloads

Abstract

Alternative propulsion motors have been studied to increase the performance/consumption ratio in vehicles. A solution is the HEVs (hybrid electric vehicles), which are becoming important to the automotive industry. The electric motor BLDC (Brushless Direct Current) has been chosen to integrate the HEVs because of its characteristics, such as silent operation and high efficiency. Therefore, the motor operating principle is important to develop studies and research in automotive industries. The aim of this study is to develop a BLDC mathematical model to obtain the physical dimensions, such as current, voltage and torque through the comparison of the simulation time between existing models in the literature and experimental tests to integrate a virtual vehicle model. Two models are studied in this article, a simple one that approximates the three phases of BDLC motor to one single phase, as in a brushed DC motor, and a model that considers all phases and their commutation. Both models are compared in terms of computational effort and accuracy of the results, and the DC motor was the one that best integrated the vehicle model. Furthermore, an experimental measurement is performed to calibrate the model and it is integrally acquired by an Arduino UNO board, an inexpensive board. All models are implemented in the software Matlab/SimulinkTM where the voltage is the required input and several variables, such as phase current, speed, friction, and torque, can be the output.

Keywords

BLDC Simulation Electric motor Control Modeling 

List of symbols and abbreviations

BEMF

Back electromotive force

BLDC

Brushless direct current

ANOVA

Analysis of variance

v

Voltage

R

Resistance

i

Current

L

Inductance

e

Back electromotive force

kv

Speed constant

ω

Mechanical revolution speed

f

Waveform function

θ

Angular position

T

Torque

ki

Torque constant

J

Inertia

B

Damping

s

Laplace variable

Subscripts

k

Generic phase

a

Phase a

b

Phase b

c

Phase c

e

Electric

m

Mechanic

fat

Dry fiction

Notes

Acknowledgments

The authors thank the Brazilian Federal Agency for Support and Evaluation of Graduate Education (CAPES), the National Council for Scientific and Technological Development (CNPq), the São Paulo Research Foundation (FAPESP), Espaço da Escrita–Coordenadoria Geral (for the language services provided), and the University of Campinas (UNICAMP) for financial and for developed support.

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Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2018

Authors and Affiliations

  1. 1.School of Mechanical EngineeringUniversity of Campinas, Cidade Universitária Zeferino VazCampinasBrazil

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