Minimization of Torque Ripple in DTC of Induction Motor Using Fuzzy Mode Duty Cycle Controller
Among all control methods for induction motor drives, Direct Torque Control (DTC) seems to be particularly interesting being independent of machine rotor parameters and requiring no speed or position sensors. The DTC scheme is characterized by the absence of PI regulators, coordinate transform...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
College of Engineering, University of Basrah
2011-06-01
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| Series: | Iraqi Journal for Electrical and Electronic Engineering |
| Online Access: | http://ijeee.org/volums/volume7/IJEEE7PDF/Paper78.pdf |
| Summary: | Among all control methods for induction
motor drives, Direct Torque Control (DTC) seems
to be particularly interesting being independent of
machine rotor parameters and requiring no speed
or position sensors. The DTC scheme is
characterized by the absence of PI regulators,
coordinate transformations, current regulators and
PWM signals generators. In spite of its simplicity,
DTC allows a good torque control in steady state
and transient operating conditions to be obtained.
However, the presence of hysterics controllers for
flux and torque could determine torque and current
ripple and variable switching frequency operation
for the voltage source inverter. This paper is aimed
to analyze DTC principles, and the problems related
to its implementation, especially the torque ripple
and the possible improvements to reduce this torque
ripple by using a proposed fuzzy based duty cycle
controller. The effectiveness of the duty ratio
method was verified by simulation using
Matlab/Simulink software package. The results are
compared with that of the traditional DTC models. |
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| ISSN: | 1814-5892 2078-6069 |