Author : S.Nirmala 1
Date of Publication :14th June 2017
Abstract: The drastic reduction in the cost of power electronic devices and annihilation of fossil fuel in the near future invites us to use photovoltaic generated electrical energy for various applications. The collector just collects the emission that fall on it and converts a portion of it to other form of power (either electricity or heat). During night time or when there is a heavy cloud cover, the amount of energy produced by the collector will be reduced. The storage unit can store the excess energy produced during the periods of maximum productivity and release it when the productivity drops. The single-ended primary-inductor converter (SEPIC) is a kind of DC/DC converter allowing the electrical potential (voltage) at its output to be larger than, fewer than, or equivalent to that at its input. The production of the SEPIC is restricted by the duty cycle of the power transistor. The INC-CONDUCTANCE algorithm is used for tracking the maximum point at which the desirable amount of solar energy is obtained. The production of the SEPIC converter is dc supply but the BLDC motor runs on ac source only hence the obtained dc source has to be converted to ac source with the help of inverter. The elevator is variable speed system; the operation of the elevator is controlled by the BLDC motor [2]. The height of the building is sensed and accordingly the speed of the motor is controlled. The speed of the motor depends upon the voltage and the frequency hence the feedback from the elevator is sent to the inverter to adjust the voltage and the frequency so that the speed of the motor can be controlled for the desirable operation of the elevator system.
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