If you are wondering about the difference between 3 stage vs single stage AC motors, just remember this. Single stage AC motors usually are powered by a single phase way to obtain power while 3 stage AC motors operate on a three phase source of power. The single stage alternating electric current is the most common source of power used by most households and non industrial businesses. It is the power that is used to light homes and power TVs in THE UNITED STATES. Today, most commercial structures in the US use the 3 phase alternating current motors due to its versatility an power density. The 3 phase AC motor is specially common in huge businesses including in the manufacturing and industrial businesses.
Data centers today have become power intensive, so that they can become able to offer storage and computing capabilities. This has led to the growth in demand of power supply to meet 
the needs of the data centers. The single phase alternating electric current power motor can’t meet the power needs of these data centers because it requires costly rewiring. Three stage alternating current power electric motor is economical to provide capacity to data center because it requires less conductor material to provide electricity. This explains why 3 phase alternating current motor is utilized in electric transmission, era and distribution generally in most countries globally. The single stage alternating current motor is less reliable and more expensive to be utilized in a national electrical power grid in comparison to 3 phase alternating current motor.
Both 3 phase and solitary phase ac motors contain two parts, namely the rotor and stator. The stator may be the part of the motor, which is stationary as the rotor is merely the rotating area of the motor.