The shaft power of my centrifugal pump is 22 kilowatts. What power rating should the motor have? ?
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Is it okay to choose a power of 22*1.25kw? ? ?
At least a 30kW motor must be selected!
In any case, the power of the motor chosen is usually slightly higher than the shaft power (there are power losses due to the couplings and various bearing components), but it shouldn’t be much higher either; otherwise it would be inefficient. If this is for a graduation project, it’s necessary to calculate the overall efficiency, to determine how many points of power loss there are at both ends of the motion transmission, and then determine the exact value. There are also relevant manuals for selecting motors, which can be consulted