Power Characteristics of BLDC motor for Design of e-Powered Agricultural Machine

Marginal and small farmers, having less than 2 ha land and small size of plots, in India depend on animate power for various agricultural operations. There is a need of such prime movers in India to provide a clean source of power for light to medium farm operations which require power of 576W to 1080W. Power characteristics on various loads with two battery-power packs was analyzed using frictional resistance mechanism. A 48 V BLDC 1.5 kW motor was studied for voltage and current drawn characteristics at varying loads (gradual and fixed load) with 24 Ah and 48 Ah capacities of deep rechargeable batteries power packs. It is observed from laboratory study that higher battery capacity (48 Ah) power pack provided stability in voltage and current drawn at varying loading condition. The maximum and sustainable power obtained from 1500 W BLDC motor suggests to have maximum speed of 5km/h for designing a walk-behind electric prime mover as an electrimate source of power in agriculture. Optimum power was derived of 844W at speed of 0.42m/s for designing a small walk-behind electrical agricultural prime mover of 700mm operational width. Use of electrical energy through battery have great capability in reducing burden of global emissions in terms of 41.8 kg CO₂/ha for one operation.