Question

What are the methods to minimize the energy loss due to heat in a circuit?

Answer 1

Explanation:

you can laminated the core. Hysteresis losses reduce by special core material which reached to zero or near zero flux density after removal of current. Hysteresis losses can be reduced by increasing the number of laminations. The laminations are provided by small gap in between plates.

Answer 2

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1. Reactive power is consumed in the magnetic circuits of loads such as motors and by non- compensated fluorescent lighting. If not corrected, the current circulating in the conductors increases although the same level of active power is being used.For cos φ = 1, the current and the voltage are in phase and the current is minimal.The greater the deviation from this ideal value, the greater the degradation of operation with the following five consequences.

2. Harmonics” (currents or voltages with a frequency which is a multiple of the 50 or 60 Hz operating frequency) are generated by certain “non-linear” equipment, in particular those containing electronic components: domestic equipment, computers, inverters, variable speed drives, etc. They are superimposed on the current or voltage in the electricity supply network.These harmonics travel upstream on the network and create a form of pollution for all other equipment.

3. These losses are produced by current flowing through all parts of the electricity supply network in the building (the Joule effect).The replacement of old apparatus or equipment by more modern hardware can significantly reduce these losses.