Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 53 for “"induction machines"”.
-
State estimation in induction machines
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1985.
-
Aspects of brushless doubly-fed induction machines.
… of two parts, studies the brushless doubly-fed induction machine (BDFM)- an electric machine with two stator windings, a modified cage-rotor, and, when run synchronously, the electrical properties of a synchronous machine, i.e. precise speed and power-factor control. The first part of this …
-
Non-intrusive efficiency estimation of induction machines
… on site. In order to assess the efficiency of an induction machine, it is subjected to numerous testing procedures established by recognised international testing standards. These procedures are considered to be time consuming, manually intensive and disruptive to the machine’s operation. Also, …
-
Speed and parameter estimation for induction machines
Thesis (M.S. and Elec. E.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1988.
-
Methods of Analyzing the Performance of Induction Machines.
The modeling of induction machines during transient conditions, in order to analyze their effects on the generating station auxiliaries systems, poses some complications for the power system engineer. One concern is establishing realistic motor data for use in modeling large motors. The second is …
-
Torque -Angle Based Analysis and Control of Induction Machines
… and direct-torque control are the most popular induction motor control methods. One common feature that is shared by these control methods is to regulate the amplitude of the flux in the induction motor. There are numerous techniques to improve the steady-state and dynamic performance by …
-
Efficient operation of variable-pole induction machines and drives
… and have high risk of price volatility. An induction machine (IM) is a magnet-free motor which offers a cost-effective, rugged and reliable alternative to permanent magnet motors. IMs have been widely established in EVs and are still used in modern designs. The magnetic pole count of an IM can …
-
Calculation of Unbalanced Magnetic Pull in Cage Induction Machines
If the rotor of an induction motor is not concentric with the stator then an electromagnetic force is generated in a direction that will increase the eccentricity. This is called unbalanced magnetic pull (UMP). The first part of the work presented in this dissertation develops theoretical models …
-
Non-intrusive efficiency estimation of inverter-fed induction machines
Motorised loads using induction machines use approximately 60% of the electricity globally. Most of these systems use three-phase induction motors due to their robustness and lower cost. They are often installed in continuously operating industrial plants/applications that require no operational …
-
Development of magnetic induction machines for micro turbo machinery
… and testing of an axial-gap magnetic induction micro machine, which is a two-phase planar motor in which the rotor is suspended above the stator via mechanical springs, or tethers. The micro motor is fabricated from thick layers of electroplated NiFe and copper, by our collaborators at …
-
Model-based speed and parameter tracking for induction machines
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1989.
-
Operation of induction machines in the presence of unbalanced supplies
Three-phase induction machines are widely used in South Africa for industrial, commercial and residential applications because of their simple construction and low maintenance. The manufacturers design these motors to provide their nameplate ratings when supplied with balanced sinusoidal voltages. …
-
Harmonic control of multiple-stator induction machines for voltage regulation
Small, one to a few horsepower, three-phase induction machines with three sets of electrically-isolated, magnetically-coupled stator winding circuits are described. A voltage inverter is developed and used to drive one set of the machine stator winding circuits. The second set of machine stator …
Page 1 of 3