How to Calculate Number of Damper Bars?
Number of Damper Bars calculator uses Number of Damper Bar = Pole Arc/(0.8*Slot Pitch) to calculate the Number of Damper Bar, Number of Damper Bars provides starting torque necessary for starting the synchronous motor. It also prevents hunting of synchronous motor, that is it reduces oscillations of the rotor when the motor deviates from synchronism. Number of Damper Bar is denoted by nd symbol.
How to calculate Number of Damper Bars using this online calculator? To use this online calculator for Number of Damper Bars, enter Pole Arc (θ) & Slot Pitch (Ys) and hit the calculate button. Here is how the Number of Damper Bars calculation can be explained with given input values -> 10 = 257.6/(0.8*32.2).