Badrilal L. Mathur

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Computing motion on the basis of the time-varying image intensity is a difficult problem for both artificial and biological vision systems. We will show how one well-known gradient-based computer algorithm for estimating visual motion can be implemented within the primate's visual system. This relaxation algorithm computes the optical flow field by(More)
Partial shading has been identified as a major cause of reducing energy yield in a large solar photovoltaic array (SPVA). Partial shading may be due to due to tree leaves falling over it, birds or bird litters on the array, shade of a neighboring construction, passing clouds etc. Under partial shaded conditions the PV characteristics get more complex with(More)
This paper describes the concept of adaptive current harmonic elimination for the permanent magnet brushless dc (PMBLDC) motor drive. Selective harmonic elimination pulse-width modulation (SHE-PWM) techniques offer a tight control of the harmonic spectrum of a given voltage/current waveform generated by a power electronic converter. In the proposed(More)
A new approach for protection of power transformer is presented using a time-frequency transform known as Wavelet transform. Different operating conditions such as inrush, Normal, load, External fault and internal fault current are sampled and processed to obtain wavelet coefficients. Different Operating conditions provide variation in wavelet coefficients.(More)
This paper presents the model of a solar photo voltaic (SPV) module to represent its behaviour in both forward and reverse bias conditions. This complete model arrives from the breakdown mechanisms in SPV cells and calculates the second quadrant parameters. It can be modified to any SPV cell in which reverse characteristic is subjected to avalanche(More)
In electromagnetic attraction type of magnetic levitation system, the intensity of the force of attraction depends on the magnitude of the current through the coil. The coil hence must be designed in such a way that it does not get heated while producing the required force. Here Finite element analysis (FEA) is done to find the force produced on the object(More)