A permanent magnet stepper motor is modified to hold a dichroic polarizer inside the motor. Rotation of the polarizer by 90° ± 0.04° is accomplished within 80 ms. This device is used for measurements of the intensity ratio for two orthogonal linear polarized components of a light beam. The two selected polarizations can be rapidly alternated to allow for signal drift compensation, and the two s...

Materials and methods Biplane Fluoroscopy System: The system consists of two Philips BV Pulsera C-arms set in custom frames around a raised floor with a radiolucent imaging area. X-ray images are captured with high speed (1000fps) cameras. Validation Object: 1.6mm tantalum beads were placed in a machined block (wand) then measured to 7 microns with a Coordinate Measuring Machine to determine th...

Abstract In solar tracking system, general stepper motor is used to control the stepwise movement and low speed of panel in vertical motion. Degree rotation directly proportional (stepping method) motor. But it cumbersome process hold a at particular position depending on sun’s using cost motors. So, geared DC implemented into for low-speed applications Stepping Method ( GDCSM ). per step ident...

In this paper a new structure of the linear transverse flux machine will be presented. It is a combination of a hybrid linear stepper motor and of a linear transverse flux machine with permanent magnets. The design algorithm of the proposed structure will be presented in detail. Upon this algorithm a motor required by a specific application was designed. Several programming packages were used d...

⎯ we present a normally open stepper motor actuated microvalve based on micro and fine-machining technique. In this paper, first we have described how the larger controllable flow range can be achieved with simple micromachining techniques and secondly we have presented the results which show how the performance of the microvalve can be improved by using combination of different metal screws fo...

The design of a hybrid stepper motor for achieving a specific performance necessitates the choice of appropriate tooth geometry. In this paper, a detailed account of the results of twodimensional and three-dimensional finite-element (FE) analyses, conducted with different tooth width/tooth pitch ratios (t/X) and also with various tooth/slot shapes such as rectangular, trapezoidal, triangular, a...

<img src="blob:http://ijra.iaescore.com/f3842e5c-715f-4e1e-9ffd-952309f5ccb1" alt="" />Stepper motors are broadly utilized in actual systems, which marked by non-linear parameters such as internal, external noises and uncertainties from wireless network. As well, a suitable controller is required when the problem to track target signal. In this paper, robust based on model reference inves...