Closed loop speed control of a squirrel cage induction motor by a variable frequency supply.

Nalçaci, A Erbil


Active clamped ZVS forward converter with soft-switched synchronous rectifier for high efficiency, low output voltage applications
Acik, A; Cadirci, I (Institution of Engineering and Technology (IET), 2003-03-01)
The analysis, design, and implementation of an active clamped ZVS forward converter equipped with a soft-switched synchronous rectifier (ACFC-SR), proposed for high-efficiency low output voltage DC-DC converter applications, is presented. The converter efficiency is maximised due to soft switching of the main, active clamp, synchronous rectifier, and freewheeling MOSFET switches. The operating principles of the ACFC-SR are analysed in detail, and the converter performance is compared with that of alternativ...
Direct Torque Control of a 4-Phase Switched Reluctance Machine
Petrus, V.; Pop, A. -C.; Martis, C. S.; Iancu, V.; Gyselinck, J. (2011-09-10)
Due to its doubly salient structure and highly nonlinear behavior, the Switched Reluctance Machine (SRM) operates with very high torque ripple. To overcome these inconveniences different average and instantaneous torque control techniques were developed. This paper presents an instantaneous torque control technique named Direct Torque Control (DTC) implemented on a 4-phase, 8/6, 0.75kW SRM. Simulations results with modified flux observer and with fast torque response are presented and discussed, along with ...
Common mode voltage and current reduction in voltage source inverter driven three phase ac motors
Ün, Emre; Hava, Ahmet Masum; Department of Electrical and Electronics Engineering (2007)
In this thesis various reduced common mode voltage (RCMV) pulse width modulation (PWM) techniques and active/passive common mode voltage (CMV) reduction methods for voltage source inverter driven three-phase AC motors are theoretically and practically investigated. A novel RCMV-PWM method, the near state PWM (NSPWM) method is proposed for operation at high modulation index. At low modulation index, a modified version of an existing RCMV-PWM method, AZSPWM1, termed as MAZSPWM, is proposed to mitigate the vol...
Steady state characteristics of polarised-mho and directional relays with application to series compensated lines.
Abusharkh, M. Fawzi; Türeli, Ayhan; Department of Electrical and Electronics Engineering (1979)
Distributed adaptive output feedback control design and application to a formation flight experiment
Kutay, Ali Türker; Calise, Anthony J.; D'Andrea, Raffaello (2005-01-01)
An approach for augmenting existing distributed controller designs for large-scale interconnected systems with neural network based adaptive elements is proposed. It is assumed that the controllers are interconnected in the same way as the plant and based on the available measurements, a single hidden layer neural network is introduced for each subsystem to partially cancel the effects of the sub-system interconnections and modeling errors on tracking performance. Boundedness of error signals is shown throu...
Citation Formats
A. E. Nalçaci, “Closed loop speed control of a squirrel cage induction motor by a variable frequency supply.,” Middle East Technical University, 1981.