The results of calculation and experimental , B. Windage Losses of Outside Fan determination of mechanical losses in several motors of rated power 2,2 kW-15 kW and number of poles 2 4 , degree protection IP 54 are presented in the paper. There were determined friction and windage losses in these motors and taken into consideration the influence of seals on the value of friction losses. There was done an analysis of test results and the influence of the mechanical losses on motor efficiency.
Evaluation of energy use by electrical motors, standard conditions of efficiency levels of electrical motors, methodology and calculation results of economical effects of using high efficiency motors are presented in the paper. (Evaluation of the influence of applying high efficiency electrical motors for the energy saving).
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