REDUCTION OF TORQUE OSCILLATIONS IN INDUCTION-MOTORS, DUE TO SWITCHING OF THE SUPPLY, BY INITIAL FLUX SETTLEMENT

1994-04-14
NALCACI, AE
A new method for reduction of transient torques in a three phase induction motor, for starting from rest is described. In this method an initial DC current in the stator windings is necessary. The procedure to find the necessary amount of this current is explained. The method is also tested in a digital simulation and compared with one of the previously proposed methods

Suggestions

Determination of rotor slot number of an induction motor using an external search coil
Keysan, Ozan; Ertan, Hulusi Bülent (null; 2009-12-01)
This paper describes determination of the number rotor slots of an induction motor from the induced emf in an external search coil. This information is needed in prediction of motor speed from the external search coil induced voltage. The approach is based on identifying saliency harmonics and rotor slot harmonics, via FFT analysis of the external search coil emf. The proposed approach is tested on an induction motor driven by the mains supply. The experiments are repeated with a PWM supply. It is shown tha...
STARTING TRANSIENTS IN SLIP ENERGY RECOVERY INDUCTION-MOTOR DRIVES .2. FLOWCHART AND PERFORMANCE
AKPINAR, E; PILLAY, P; Ersak, Aydın (1992-03-01)
The first part of this two-part paper described the starting transients of a slip energy recovery IM drive using the rotor rectifier and a single resistor instead of three resistors and an ac circuit breaker. The starting transient was divided into three stages; the first was the resistance starting, the second was the connection of the inverter and the third was the disconnection of the starting resistor. The diode bridge rectifier imposes constraints onto the machine equations; the relevant equations fo...
Selective Harmonic Elimination for Variable Frequency Traction Motor Drives Using Harris Hawks Optimization
Nalçacı, Gamze; Yildirim, Dogan; ÇADIRCI, IŞIK; Ermiş, Muammer (2022-07-01)
In this article, Harris hawks' optimization (HHO) for selective harmonic elimination method (SHEM) of a voltage source inverter has been applied to a traction motor drive for light rail transportation. The main objective of SHEM's pulsewidth modulation (PWM) strategy is to remove the low-order harmonics by solving nonlinear equations while satisfying the required fundamental component's magnitude. The HHO applied in this article to a two-level, three-phase inverter aims at solving the associated nonlinear e...
A Novel Noise Reduction Technology for Switched Reluctance Motors
Bizkevelci, Erdal; Özlü Ertan, Hatice Gülçin; Leblebicioğlu, Mehmet Kemal (2008-07-24)
The conditions are sought at which an SIR motor can be operated with highest efficiency, while producing a desired torque output at low shaft torque ripple. The investigation is based on the simulation software that uses measured flux-linkage (V, 0, 1) and static torque (T, 0, 1) characteristics of a given motor. The variation of the shaft torque, torque ripple and efficiency of the motor Is investigated, while the control variables "advance angle" and "conduction angle" are swept over their range with a co...
STARTING TRANSIENTS IN SLIP ENERGY RECOVERY INDUCTION-MOTOR DRIVES .1. FORMULATION AND MODELING
AKPINAR, E; PILLAY, P; Ersak, Aydın (1992-03-01)
A detailed study of the rotor phenomena including the rectifier commutation angle and inverter harmonics is facilitated by the use of the actual rotor conduction sequence variables instead of transformed variables that are used in most other IM drive systems. The starting transients of slip energy recovery IM drives comprising three stages are presented here; (a) the starting from zero speed with a starting resistor connected to the output of the rotor rectifier; (b) a transition period in which the invert...
Citation Formats
A. NALCACI, “REDUCTION OF TORQUE OSCILLATIONS IN INDUCTION-MOTORS, DUE TO SWITCHING OF THE SUPPLY, BY INITIAL FLUX SETTLEMENT,” 1994, p. 777, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/63797.