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Pulsbreddsmodulering av styrsignal till DC-motor

Andersson, Jan (1986) In MSc Theses
Department of Automatic Control
Abstract
The purpose of this work was to investigate if the choice of frequency, on a pulse width modulated control signal to a DC motor, might influence the behaviour of the system, as wall as to see how the system reacts in connection with the controlling by means of such a signal. I came to the conclusion that the frequency was not critical seen from the system's point of view, but should be chosen so that the control algorithm just can manage to be run through in one period of the pulse width modulated signal. This would enable the control of each pulse. The power-transistor card did not perfectly transmit the pulse width modulated signal to the motor, which might be the reason why the number of revolutions did not increase linearly with the... (More)
The purpose of this work was to investigate if the choice of frequency, on a pulse width modulated control signal to a DC motor, might influence the behaviour of the system, as wall as to see how the system reacts in connection with the controlling by means of such a signal. I came to the conclusion that the frequency was not critical seen from the system's point of view, but should be chosen so that the control algorithm just can manage to be run through in one period of the pulse width modulated signal. This would enable the control of each pulse. The power-transistor card did not perfectly transmit the pulse width modulated signal to the motor, which might be the reason why the number of revolutions did not increase linearly with the duty cycle of the out-signal. The system functioned in a good way when I P-controlled the motor speed. It was not notable that the control signal is pulse width modulated instead of analogous. The Motor Control Unit developed by AB Sandvik Electronics was very well prepared for the pulse width modulation. (Less)
Please use this url to cite or link to this publication:
author
Andersson, Jan
supervisor
organization
year
type
H3 - Professional qualifications (4 Years - )
subject
keywords
Pulse width modulation, DC motor
publication/series
MSc Theses
report number
TFRT-5358
ISSN
0280-5316
language
Swedish
id
8849557
date added to LUP
2016-03-27 17:17:57
date last changed
2016-03-27 17:17:57
@misc{8849557,
  abstract     = {The purpose of this work was to investigate if the choice of frequency, on a pulse width modulated control signal to a DC motor, might influence the behaviour of the system, as wall as to see how the system reacts in connection with the controlling by means of such a signal. I came to the conclusion that the frequency was not critical seen from the system's point of view, but should be chosen so that the control algorithm just can manage to be run through in one period of the pulse width modulated signal. This would enable the control of each pulse. The power-transistor card did not perfectly transmit the pulse width modulated signal to the motor, which might be the reason why the number of revolutions did not increase linearly with the duty cycle of the out-signal. The system functioned in a good way when I P-controlled the motor speed. It was not notable that the control signal is pulse width modulated instead of analogous. The Motor Control Unit developed by AB Sandvik Electronics was very well prepared for the pulse width modulation.},
  author       = {Andersson, Jan},
  issn         = {0280-5316},
  keyword      = {Pulse width modulation,DC motor},
  language     = {swe},
  note         = {Student Paper},
  series       = {MSc Theses},
  title        = {Pulsbreddsmodulering av styrsignal till DC-motor},
  year         = {1986},
}