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Optimization of PM Brushless DC Motor Drive Speed Controller using Modification of Ziegler-Nichols Methods based on Bode Plot
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| Author(s) |
Petar Crnosija, Krishnan Ramu, Toni Bjazic |
| Abstract |
The most commonly used methods for design of
the industrial speed controllers are: experimental, root
locus, frequency and optimization methods. The most
commonly used experimental methods are Ziegler-Nichols
methods: stability margin and step response function.
Ziegler-Nichols methods are applied for design of speed
controller of PM brushless DC motor drive. Both methods
give the controller parameters, which result in relatively
high overshoot in response to reference signal. Therefore,
optimal speed controller parameters are determined by
modification of Ziegler-Nichols methods based on Bodé’s
frequency diagrams. Thereby, controller integral time
constant is increased and controller gain is reduced
(increased) to achieve faster and better load torque
compensation than traditional controller synthesis based on
compensation of maximum time constant of drive. Desired
overshoot in response to reference change is achieved by
adding a first order filter at the drive input. Synthesis
results and responses are given in this paper. |
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| Filename: | T5-301.pdf |
| Filesize: | 344.6 KB |
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| Type |
Members Only |
| Date |
Last modified 2007-03-12 by System |
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