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Designing and implementing a DSP based variable-speed drive for theatre stage systems Li , Yan
Abstract
Today's power electronics technology and digital control system provide a convenient means to boost the performance of electrical drive systems. While the industry has witnessed a variety of applications of electrical variable-speed drives, this work is focusing on designing and implementing a DSP controlled 3-phase variable-speed drive for a theatre stage system to achieve automatic operations and accurate position control. A cascade structure with feed-forward reference is selected as the control algorithm for this application. As a key factor in motion control, profiles of acceleration, speed and position (ASP) are also investigated. A trapezoidal speed profile with limited jerks is recommended for the final implementation. In addition, some operational conditions for safe and agreeable operations have been discussed and identified. Before proceeding with the experiment, the dynamics of the whole system including the controller, the voltage source inverter, the induction machine and the stage has been evaluated by MATALB/Simulink. The non-linear behavior of induction machines is studied and a linearized induction machine model under variable-frequency conditions is developed to verify the closed loop stability of the whole system. A test facility is then constructed to validate system performance. A DSP controlled 3-phase inverter is built and tested. Multiple measures are implemented into the IGBT drive for obtaining immunity to high common-mode dv/dt noise. Quantitative methods for sizing the gate resistor are also presented in this paper. Four different motion control algorithms are employed to find the most suitable for this application. Both experimental and simulation results indicate that closed loop position control is critical to achieve required accuracy of position for the stage system.
Item Metadata
Title |
Designing and implementing a DSP based variable-speed drive for theatre stage systems
|
Creator | |
Publisher |
University of British Columbia
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Date Issued |
2007
|
Description |
Today's power electronics technology and digital control system provide a
convenient means to boost the performance of electrical drive systems. While the
industry has witnessed a variety of applications of electrical variable-speed drives, this
work is focusing on designing and implementing a DSP controlled 3-phase variable-speed
drive for a theatre stage system to achieve automatic operations and accurate
position control.
A cascade structure with feed-forward reference is selected as the control
algorithm for this application. As a key factor in motion control, profiles of acceleration,
speed and position (ASP) are also investigated. A trapezoidal speed profile with limited
jerks is recommended for the final implementation. In addition, some operational
conditions for safe and agreeable operations have been discussed and identified.
Before proceeding with the experiment, the dynamics of the whole system
including the controller, the voltage source inverter, the induction machine and the stage
has been evaluated by MATALB/Simulink. The non-linear behavior of induction
machines is studied and a linearized induction machine model under variable-frequency
conditions is developed to verify the closed loop stability of the whole system.
A test facility is then constructed to validate system performance. A DSP
controlled 3-phase inverter is built and tested. Multiple measures are implemented into
the IGBT drive for obtaining immunity to high common-mode dv/dt noise. Quantitative
methods for sizing the gate resistor are also presented in this paper. Four different motion
control algorithms are employed to find the most suitable for this application. Both
experimental and simulation results indicate that closed loop position control is critical to
achieve required accuracy of position for the stage system.
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Genre | |
Type | |
Language |
eng
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Date Available |
2011-02-24
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
|
DOI |
10.14288/1.0103900
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.