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Pole phase modulated (PPM) multiphase induction motor (IM) drives for applications like ship propulsion starts with high pole mode of operation to provide high starting torque required and then switch over to low pole mode of operation for steady run with high speeds. The performance of the nine phase PPM IM drive in case of nine phase four pole operation is inherently good due to high phase number...
This paper describes a rare-earth-free synchronous motor where space harmonic power is utilized for field magnetization instead of permanent magnets for automotive applications. The stator has a concentrated winding structure, and the rotor has separate two types of windings, i.e., an induction coil that retrieves mainly the second space harmonic and an excitation coil for the field magnetization...
Linear induction motors (LIMs) have become a competitive alternative in electric traction. Three-phase LIM commonly uses double layer overlapping distributed windings. Although this winding configuration results in more sinusoidal magneto-motive force (MMF), hence good machine performance, it has relatively bulky end windings and uses either half-filled slots or overhanging coil sides at the machine...
The curved PM linear motor is a particular type of linear motor that can satisfy some special utilities. This paper presents an analytical model of the motor based on harmonics analysis. The harmonics of magnetic field induced from PMs and armature windings are obtained using the equivalent MMF source and the slot star, respectively. The effect of the armature slots on the flux distribution is analyzed...
Nowadays in high-power industrial processes, multipulse cycloconverters are the most commonly used converter for high power mill drives. This paper propose an analysis of the interharmonics currents behavior under an unbalanced load, injected by a Cycloconverters (CCVs) with 12- pulse configuration and multi-winding transformers. Three-phase transformers with two secondary windings with star and delta...
A multi-level inverter configuration for 4n pole induction motor drive is presented in this paper. This topology is developed using three two-level inverters and two isolated dc sources. Among these three two-level inverters one inverter is switched at fundamental frequency and remaining two inverters are switched at higher frequency. Two isolated dc sources with equal magnitude are used in this topology...
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