Why does efficiency increase with load

Learn more. Why is an electric motor more efficient at higher loads? Ask Question. Asked 8 years, 11 months ago. Active 2 years, 1 month ago. Viewed 31k times. What is the cause of this phenomenon? Improve this question. TerryTate TerryTate 1 1 gold badge 1 1 silver badge 5 5 bronze badges. AC, DC, and there are plenty of subtypes of both.

You'll be more likely to get a good answer if you can provide this information. Add a comment. Active Oldest Votes. Improve this answer. Eric Eric 1 1 silver badge 5 5 bronze badges. This continues until I2R heating and eventually eventually cooling losses dominate. Anon Anon 21 1 1 bronze badge. So motors are designed to work at specific load range to save cost.

Tony Tony 1. The M was determined from oxygen consumption measurements. The ME was calculated in two ways, depending on the definition of mechanical power, including either the external power only MEext or the total power output MEtot.

Despite a constant total mechanical power, M increased at higher loads and lower frequencies. This might be explained by the increasing isometric force required in postural and load control. When temperatures exceed the rating for the insulation system or enclosure, overheating occurs. Burned, darkened or damaged insulation may be apparent along with a burnt smell. The copper windings heat first when a transformer is overheating. Eventually, the wire will reach a temperature at which the insulation begins to degrade, to lose mechanical strength, to smoke and char, to catch fire, to melt, not necessarily in that order.

Begin typing your search term above and press enter to search. Press ESC to cancel. Skip to content Home Resume When the load on transformer increase the efficiency will? Ben Davis April 24, When the load on transformer increase the efficiency will? How does transformer efficiency changes as load increases? What affects transformer efficiency? How can we increase the efficiency of a transformer? Which condition the efficiency of a transformer is maximum?

What will happen if the efficiency of a transformer is poor? Can a transformer change AC to DC? Why is transformer efficiency so high? Why the efficiency of transformer is very high compared to other machines? What causes energy loss in transformers? How much energy is lost in a transformer?