How to Choose the Right Single Phase Motors for Your Needs

What are the common sizes of single phase motors?

Most single phase motors are of fractional horsepower sizes 1/6-3/4 hp, although sizes of ___________ to _________ hp are available.

Answer:

Single phase motors commonly range from 1/6 to 3/4 hp, but can reach up to several hp. The output should not be expected to exceed 0.5 hp due to efficiency losses.

Most single phase motors are indeed of fractional horsepower sizes, typically ranging from 1/6 to 3/4 hp. However, these motors can be available in sizes from less than 1 hp to several horsepower. When choosing a motor, one should consider the gain in kinetic energy that can be expected from the motor's operation. It's important to note that the energy efficiency is not absolute, meaning that the output will generally not exceed the motor's designated horsepower, with efficiency losses due to heat and friction. Therefore, do not expect that your output will be more than about 0.5 hp, as the actual usable horsepower may be less than the motor's rated capacity due to these losses.