Page 87 - Industrial Power Engineering and Applications Handbook

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To draw the thermal curves
From cold conditions

(a) When I, 5 200% I, Shock loading
Energy stored by the flywheel
(3.9)

(3.13)
(b) When I, > 200%
F = energy stored by the flywheel in Joules
(3.10) W = weight of the flywheel in kg
VI = velocity of the flywheel in m/s
g = 9.81 m/s2
Equivalent output of short-time duties
Energy to be shared by the flywheel
P? ' tl + P;- ' t2 + P? ' tj
P,,(r.m.s) = (3.1 1)
tl + t2 + t,
(3.14)

Teq (r.m.s) = (3.12) T2 = corresponding to peak load P2
t, + t2 + t3 Teq = corresponding to the h.p. of the motor