Abstract
This paper presents a Hybrid Excited Double-Sided Linear Flux Switching Machine (HEDSLFSM) with a crooked tooth modular stator. Generally, the conventional stators are made of a full-length iron core, increasing manufacturing costs and iron losses. Higher iron losses result in lower efficiency and lower overall performance. A U-shaped modular stator with a crooked tooth is used to lower iron consumption and increase the machine’s efficiency. Ferrite magnets are used to replace rare earth magnets, which also reduces the machine cost. Two DC excitation windings are used above and below the ferrite magnet to reduce the PM volume. 2D electromagnetic performance analysis is done to observe the key performance indices. Geometric optimization is used to optimize the Split Ratio (S.R), DC winding slot area (DCw), and AC winding slot area (ACw). Stator Tooth Width (STW), space between the modules (S.S.), and crooked angle (α) are optimized through JMAG in-built Genetic Algorithm (G.A.) optimization. High thrust force density and modular stator make it a good candidate for long-stroke applications like railway transits. The thermal analysis of the machine is performed by FEA analysis and then validated by 2D LPMC (Lumped Parametric Magnetic Equivalent Circuit) model. Both analyses are compared, and an error percentage of less than 4% is achieved.
Highlights
The world’s population is increasing at an alarming rate; the increased population needs improved facilities and optimal use of natural resources without bringing a significant undesirable change in the atmosphere
Division of Linear Flux Switching Machines (LFSMs) based on geometry results in two significant types (a) Single-Sided LFSM (SLFSM) (b) Double-sided LFSM (DLFSM)
This paper presents a DSLFSM with a crooked tooth modular stator
Summary
The world’s population is increasing at an alarming rate; the increased population needs improved facilities and optimal use of natural resources without bringing a significant undesirable change in the atmosphere. Rotary machines for linear motion require an efficient gearing system, which increases the machine’s overall cost and considerably lowers efficiency. All three types have major applications such maglev transportation [12], railway transit [13], linear actuator for oil pumping, and electromagnetic lunch system [14] due to its high thrust force density and higher efficiency [15]. Machines such FELFSM and HELFSM are proposed, which, like PMLFSM, have high thrust force density and higher overall efficiency without using the rare earth magnet. It has a lower thrust force density than HELFSM, and DC excitation increases the overall copper losses of the machine, thereby decreasing the whole machine’s efficiency [16].
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