How does elevated temperature affect the performance of a motor?

Elevated temperatures have a significant impact on motor performance, primarily leading to degradation of components and a decrease in both efficiency and lifespan. As temperature increases, materials within the motor, such as insulation and winding materials, can break down more rapidly. This breakdown results in a loss of insulation resistance, which can lead to short circuits and further damage.

Moreover, higher operating temperatures can cause an increase in electrical resistance, leading to energy losses in the form of heat. This not only reduces the overall efficiency of the motor but can also result in overheating, which contributes to premature failure of motor components.

Increased thermal stress affects bearings and lubricants, causing them to lose effectiveness and potentially leading to mechanical wear and failure. Hence, the combination of reduced efficiency and shortened lifespan from elevated temperatures makes this answer the most accurate representation of the effects of temperature on motor performance.