Our 60 range motors (commonly known as B56 frame motors) are produced in 2 pole, 4 pole, 6 pole and 8 pole (from 2800 down to 720RPM). They can be made to run on single, three or split phase supplies with a power output from 90 up to 990watts.
The three phase versions produce a good starting torque whilst the 3 phase rotating field allows for the motors shaft rotation to be easily reversed resulting in great flexibility for applications.
In contract though the single phase supply motors generally are not reversible and a set rotation is generated within the motor but the start winding.
Split phase supply motors are relatively inexpensive to make and produce a lower starting torque so their application is generally found in domestic applications Also due to the start winding being redundant during running the efficiency of this unit is lower than the single and three phase versions.
The units are also further differentiated by being either capacitor start induction run, capacitor start capacitor run or permanent split capacitor (PSC). The difference between these methods are that a capacitor start induction run motor are similar to split phase motor efficiencies but they can be manufactured to larger output levels. The capacitor start capacitor run motors contain two capacitors, the first is a large value electrolytic capacitor and the second a smaller value Motor Run capacitor. This version benefits from having a high starting torque due to the start capacitor and the motor is also suitable for high level power outputs due to the lower starting currents. The motor efficiency is also increased but so is the cost due to two capacitors. Finally PSC motors are the simple and robust method which have lower starting torques but are generally cheaper to produce.
