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This paper presents a comparison of Least Significant Bit (LSB) based data hiding and a proposed Histogram Shifting (HS)-Reversible Data Hiding (RDH) based on grayscale division. In LSB substitution data hiding method the secret message is embedded in the least significant bit of the cover image. In histogram shifting data hiding the pixel value of the cover image is either incremented or decremented...
Brushless DC (BLDC) motor drives are becoming more popular in industrial, traction applications. This makes the control of BLDC motor in all the four quadrants very vital. This paper deals with the digital control of three phase BLDC motor. The motor is controlled in all the four quadrants without any loss of power; in fact energy is conserved during the regenerative period. The digital controller...
This paper presents the practical implementation of the control of three phase Brushless DC (BLDC) motor in all the four quadrants. The controller dsPIC30F4011 is used. The four quadrant operation which was simulated using MATLAB / Simulink is implemented and analyzed [1]. A smooth transition between the quadrants is achieved. The time taken to change the direction of rotation of BLDC motor is also...
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