Actuator Design of a New AC PM Contactor with Energy-Saving and Noise-Free Characteristics
Developments in power electronic switches and lowcost actuator based on an electronic control module (ECM) have made it possible to design and implement modern control strategies for a new AC permanent magnet (PM) contactor. Such an attempt has made in this work for a colenoid actuator controlling the AC PM contactor. Certain important issues in design including the making signal generator and its amplifier, breaking signal generator and its amplifier, exciting coils, and a voltage regulator have been resolved. The proposed scheme is validated through extensive numerical simulations and a laboratory scale implementation.
Magnetic field analysis and control circuit design of permanent magnet actuator for AC contactor
A new permanent magnet actuator and its control circuit are designed to develop a series of permanent magnet AC contactor in this paper. The magnetic fields and the electromagnetic forces on the armature at different armature positions are computed by the finite element method based on a parametric mesh generation. The charging and discharging procedures are simulated and experimentally measured. The simulation and experimental results are in good agreement.
Texture Feature Extraction of RGB, HSV, YIQ and Dithered Images using GLCM, Wavelet Decomposition Techniques
When changing the format of an image from simple RGB to HSV, YIQ and Dithered image, the characteristics of image also change. In this paper, the similar images in the above formats are retrieved using statistical and structural retrieving techniques i.e. GLCM (Gray Level Co-occurrence Matrix) and Wavelet Decomposition techniques. The best results are coming for dithered, HSV images by using GLCM technique for feature extraction and by using Wavelet decomposition; HSV images are giving the best results. While other formats also give the correct retrieval but from the accuracy point of view, HSV images are retrieved with better accuracy using both techniques.