Migration complete.cusp.umn.edu will be discontinued and all the content will continue to be available here.
Translation is temporarily unavailable due to usage limits. Showing English content for now — sorry for the inconvenience.
Special Machines & Control
Brushless, capacitor and reluctance machines together with direct-torque-control concepts.
Author
1 Schematic diagram of a brushless dc motor (GIF)
Description: The rotor flux density distribution produced by the permanent magnets is represented by the green space vector B r. A power-processing unit supplies three-phase currents to the stator windings in such a manner that the resultant stator current space vector I s is 90° ahead of the rotor flux vector. The mmf distribution produced by the stator currents flowing in the stationary three-phase windings is equivalent to that produced by Is flowing in a single sinusoidally distributed rotating winding whose magnetic axis lines up with I s as illustrated in this animation.
Schematic diagram of a brushless dc motor
2 Schematic diagram of a 4-phase 8/6 switched-reluctance motor (GIF)
Description: A four-phase 8/6 switched-reluctance motor is shown in cross section. In order to produce continuous shaft rotation, each of the four stator phases is energized and then de-energized in succession at specific positions of the rotor as illustrated.
Schematic diagram of a 4-phase 8/6 switched-reluctance motor
3 Direct torque control of ac machines (GIF)
Description: DTC of ac drives is based on stator voltage control; hysteresis torque and flux controllers determine the errors which govern the selection of the required voltage space vectors to be applied to the motor. A simple switching logic is used to either increase or decrease the flux, and increase or decrease the torque, or effect no changes. This clip shows the voltage vectors needed to produce these controls.
Direct torque control of ac machines — view 1Direct torque control of ac machines — view 2Direct torque control of ac machines — view 3Direct torque control of ac machines — view 4Direct torque control of ac machines — view 5
4 Brushless DC motor (GeoGebra)
Description: Explore brushless dc motor.
Loading animation…
5 Single phase capacitor motor (GeoGebra)
Description: Explore single phase capacitor motor.
Loading animation…
6 Switched-reluctance motor (GeoGebra)
Description: Explore switched-reluctance motor.
Loading animation…
7 Switching table for direct torque control (GeoGebra)
Description: Explore switching table for direct torque control.
Loading animation…
No animations match your search.
We use cookies to ensure essential functionality and to improve your experience.
You can customize which optional cookies are enabled.
Cookie preferences
Essential cookiesRequired for security, authentication, and core site functionality.
SecurityGoogle reCAPTCHA required to protect forms from abuse during sign in.
PreferencesTheme and language settings.
AnalyticsGoogle Analytics to understand site usage.
Language
Choose your preferred language. We’ll remember it only if you’ve enabled Preferences cookies for this browser.
Preferences cookie is currently disabled. Enable Preferences in Cookie settings (in the footer) to remember your language selection.
Translations are generated by AI and may be inaccurate. Currently, only the website’s text content is translated. We’re working toward full translation support for files and videos in the future.
If you choose a different language by mistake, you can always reset back to English by clicking the
EN
button that appears in the footer.
