W V J H dB

Figure 4.21: Explanation of calculation of co-energy During the constant current operation of the VHM, the behaviour may be explained by considering the effect of moving from one magnetisation curve to another, P1 to P2 in Figure 4.21B, corresponding to moving the translator. The energy exchanged with the supply during this operation is equal to the change in field energy and represented by the crosshatched area. Stored field energy of the system has changed from the single hatched area to the light grey area. The discrepancy between the change in field energy and supply energy can be deduced to be the change in co-energy and is hence represented by the dark grey area. Expressed more concisely, the change in co-energy

Figure 4.21: Explanation of calculation of co-energy During the constant current operation of the VHM, the behaviour may be explained by considering the effect of moving from one magnetisation curve to another, P1 to P2 in Figure 4.21B, corresponding to moving the translator. The energy exchanged with the supply during this operation is equal to the change in field energy and represented by the crosshatched area. Stored field energy of the system has changed from the single hatched area to the light grey area. The discrepancy between the change in field energy and supply energy can be deduced to be the change in co-energy and is hence represented by the dark grey area. Expressed more concisely, the change in co-energy is equal to the area bound by successive magnetisation curves and the x-axis of a f-mmf graph. The area shaded in grey in Figure 4.20 is hence related to the electromagnetic force by equation ( 4.17).

Renewable Energy Eco Friendly

Renewable Energy Eco Friendly

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable.

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