论文信息 - Dynamic Modeling of Directive Drive Axial Flux PM Linear Oscillatory Machine Prototype Using FE Magnetic Analysis

Dynamic Modeling of Directive Drive Axial Flux PM Linear Oscillatory Machine Prototype Using FE Magnetic Analysis

A general framework for the development of a new generation of PM linear oscillating machine (PMLOM) using FE magnetic analysis suitable for short strokes is described in this paper. A microcontroller based IGBT inverter is developed for the control of thrust and oscillation frequency. The PMLOM can perform precision oscillation task with relatively low power dissipation. The use of powerful permanent magnet material such as Neodymium- Iron-Boron alloys has greatly improved the performance of the machine. The forces for aluminium mover embedded with rare earth permanent magnets are determined analytically and the results are validated extensively by comparison with finite element analyses. INEAR motors are finding increasing applications in different specific areas like high-speed transport, electric hammers, looms, reciprocating pumps, artificial heart pump, etc. (1)-(7). They are also well suited for manufacturing automation applications. Therefore, design of energy efficient and high force to weight ratio motors and its performance assessment has become a research topic for quite a few years. PMLOMs are one of the derivatives of the linear motors in the low power applications having the advantages of higher efficiency and high force to weight ratio. They can be supplied with DC or AC supply (1)-(3), and (7) of which, the DC motors are having better efficiency due to the absence of core losses. The motor designed in this paper finds the suitability of application in the loads having low frequency and short stroke length. One such application is the heart pump, where frequency of oscillation is to be adjusted between 0.5 to 1.5 Hz, with the requirement of variable thrust depending on the condition of the heart under treatment. For analysis of such motors the main task is to determine the essential equivalent circuit parameters, which are its resistances and inductances. The resistances, for the machine, though vary with operating conditions due to

A. K. Ganguli | Govindaraj Thangavel

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