Open AccessAnalysis of Brushless DC Motor with Trapezoidal Back EMF with Matlab
Author(s) -
Taha Hussain
Publication year - 2015
Publication title -
mağallaẗ tikrīt li-l-ʻulūm al-handasiyyaẗ/tikrit journal of engineering sciences
Language(s) - English
Resource type - Journals
eISSN - 2312-7589
pISSN - 1813-162X
DOI - 10.25130/tjes.22.1.05
Subject(s) - commutation , control theory (sociology) , torque , dc motor , matlab , inverter , pulse width modulation , direct torque control , power (physics) , counter electromotive force , voltage , engineering , brushed dc electric motor , induction motor , electrical engineering , computer science , physics , control (management) , quantum mechanics , artificial intelligence , thermodynamics , operating system
The dynamic characteristics such as speed and torque as well as voltages and currents of pwm brushless DC motor inverter are analyzed with a MATLAB model. The contribution of external load torque and friction torque is monitored. The switching function technique is adopted for the current control of the embedded three phase inverter that drives the brushless DC motor. In switching functions the power conversions circuits can be modeled according to their functions rather than circuit topologies. Therefore, it can achieve simplification of the overall power conversion functions. The trapezoidal type (back emf) is used in the model as it has lower switching loss compared with sinusoidal type (back emf). Results show reliable time analysis for speed, torque, phase and line voltages and currents and the effect of current commutation is clearly observed.