as the square of the speed. For example, an 1,800/900-rpm electrical
motor that develops 10 hp at 1,800 rpm produces 2.5 hp at 900 rpm. Since ac
motors face loads, such as centrifugal pumps, fans, and blowers, have a torque requirement that varies as the square or
cube of the speed, this ac
motor characteristic is usually adequate. AC
Motors - Constant torque. These ac
motors can develop the same torque at each speed, thus power output varies directly with speed. For example, an ac
motor rated at 10 hp...
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