Modelling of an electronically commutated (Brushless DC) motor drives with back-emf sensing

Author

Imoru, O. ; Tsado, J.

Author_Institution

Dept. of Electr. & Electron. Eng., Fed. Univ. of Technol., Minna, Nigeria

fYear

2012

fDate

25-28 March 2012

Firstpage

828

Lastpage

831

Abstract

Brushless DC (BLDC) motors and their drives are penetrating the market of home appliances and HVAC industry in recent years because of their high efficiency, silent operation, high reliability and low maintenance requirement. Conventionally, BLDC motors are commutated in six-step pattern with commutation controlled by position sensors. To reduce cost and complexity of the drive system, sensorless drive is preferred. The existing sensorless control scheme with the conventional back EMF sensing based on motor neutral voltage for BLDC has certain drawbacks, which limit its applications. This paper presents a circuit model of an electronically commutated motor drive with back emf sensing. The circuit model was simulated using LTspice and the results obtained were compared with the experimental results. The value of the motor constant and the back emf measured from the experiment agreed with the simulated model.

Keywords

DC motor drives; HVAC; brushless DC motors; commutator motors; domestic appliances; electric potential; machine theory; reliability; sensorless machine control; HVAC industry; LTspice simulation; back-EMF sensing; circuit model; drive system complexity; electronically commutated BLDC motor drive; electronically commutated Brushless DC motor drive; home appliance; maintenance requirement; motor neutral voltage; position sensor; sensorless control scheme; sensorless drive; Brushless DC motors; Integrated circuit modeling; Load modeling; Permanent magnet motors; Sensors; BLDC; back-emf; experimental model; motor constant;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrotechnical Conference (MELECON), 2012 16th IEEE Mediterranean

Conference_Location

Yasmine Hammamet

ISSN

2158-8473

Print_ISBN

978-1-4673-0782-6

Type

conf

DOI

10.1109/MELCON.2012.6196557

Filename

6196557