Authors:
Samyamoy Das,Prithwish Biswas,Avijit Dey,Supratim Nandi,Sudip Raut,Asoke Kumar Paul,DOI NO:
https://doi.org/10.26782/jmcms.2022.08.00003Keywords:
Efficiency,Battery longer lifespan,V/f control,solar power,carbon credit,Abstract
This thesis deals with the design and prototype development of an inverter to feed AC power to an induction motor coupled with a pump. In this type of load, input power is proportional to the cube of the speed. The inverter is fed from a 48 V rechargeable battery, which is charged through a solar panel. The basic intention of this research work is to start an induction motor with lower voltage and lower frequency, keeping v/f constant, such that the starting current is low. This concept can be utilized to run a submersible pump in a remote area where there is no electric power supply or where there is a problem in the distribution system. Submersible pumps are normally operated for a small interval (30 to 60 min). This energy can be supplied by a 48 V, 75 Amp-Hour Lead Acid type rechargeable battery. This is achieved by connecting four numbers of 12 V Lead Acid batteries. This experiment has been conducted with a Lead acid battery but the Lithium Ion battery gives better performance. The solar panel (cell) is used to charge the battery for around 8 hours from morning and with the fully charged battery, the pump is run through the inverter for a short time of around 90 min. An inverter has been designed to run a 1 hp induction motor coupled with a submersible pump. The motor is started with low voltage with v/f control. Gradually the full voltage is applied and the motor runs at the rated speed. After an operation of a preset time, the motor is stopped. In this design, we have used a PIC microcontroller to generate the Pulse Width Modulated waveform. By this technique, we have tried to increase the fundamental components of the AC voltage waveform. This improves the efficiency of the pump. The design is modular. In this application, we have used 8 MOSFETs in parallel. For higher-capacity motors, one can use more MOSFETs to deliver the primary current to the transformer.Refference:
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