3D Modeling of Double Sided Linear Synchronous Motor for EMALS

Abstract—Electromagnetic aircraft Launch System is integrated system used for launching naval aircraft. To accelerate the aircraft to launch speed; EMALS uses linear motor. At this state, Double sided linear synchronous motor (DSLSM) looks to be a far better as well as an improved alternative owing to higher potency and better power issue, which might plainly scale back the capability of power offer and facilitate the ability electrical converter design. DSLSM is made with long stator coil and short moving permanent magnet rotor. Owing to the specific generation and storage capability supply voltage is restricted to certain limit. This paper describes the basic design of DSLSM using finite Element Method (FEM).

Keywords—Double Sided Linear Synchronous Motor (DSLSM), Electromagnetic Aircraft Launch System (EMALS), Permanent magnet( PM ) and Ansys Maxwell, Finite Element Method (FEM).

INTRODUCTION

Since the invention of flight, researchers are investigating various techniques to power assist aircraft into flight. The evolution of the catapult system has gone from large rocks to weighted luggage in ancient era, to spinning flywheels then the hydraulic driven systems. Presently, Steam driven catapults are getting used to meet this purpose. EMALS (Electromagnetic launch system) has many advantages over the presently inducted Steam primarily based Launch system (Steam Catapult) such as it offers feedback due to which controlling acceleration is possible along with 30% more launch energy [1]. EMALS is low maintenance system since its moving part never touches the stationary part of the system which reduces the mechanical wear; it improves reliability of the system as well as enhances overall efficiency of ship [2]. With the recent development in EMALS; the Indian navy desires to use this state of art to enlarge the capability and efficiency of launching. EMALS utilize linear motor (LM) for launching purpose as well as it serves the purpose of braking and retracting, thereby reducing all the auxiliary elements and reducing the complexity of the general system. II. STRUCTURE OF EMALS EMALS working is generally based on four main subsystems: 1. Power source subsystem 2. Power conditioning subsystem 3. Launch motor subsystem 4. Closed-loop control subsystem
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