Eb
Ti(t) TL(t) Tf( ) m(t)
Ra
La J Rf
V Lf
V = Vf+ Va
La Ra
M f
a-m la
V=V +Vs f
la T
e(t)
M3
If
Rf
0 0
5 10 15 20 25 30 35 40 45 50 55 10
20 30 40 50 60 70 80
90 Performance characteristics of Universal Motor
Tload Torq Pout Parm Eb pt eff
Steady State Dynamic Operating Behavior of Universal Motor
Current in amperes, ac dotted lines
Performance characteristics of Universal Motor on AC & DC Supply Voltage V=200 V
4 0 10 20 30 40 50 60 70 80 90
6 8 10 12 14 16 18 20 22 24 ac & dc Torq
ac & dc Tload
ac efficiency dc efficiency
Current in amperes, dotted ac
Performance characteristics of Universal Motor on DC Supply Voltage V=200 V
4 10 0 20 30 40 50 60 70 80 90 100 110
6 8 10 12 14 16 18 20 22 24 ac speed dc speed voltage ac reverse
dc reverse voltage ac pf
dc pf
Effect of different fixed loads on Pinac & Pindo of Vac & Vdc supplied Universal Motor
0 3.705
3.7 3.71 3.715 3.72 3.725 3.73 3.735 3.74 3.745 3.75 500 1000 1500 2000 2500 ac50 dc50 ac25 dc25 ac0 dc0
Time
80 100Speed, omega, rad per second Performance characteristics of Universal Motor
5 60 40 20 0
10 15 20 25 30 35 40 45 50 55 I Pin pf Eb Eb pf Pin I Pout Torq Parm Tload efc 5
20 10 15 20 25 30 35 40 45 50 55 30 40 50 60 70 80 90
100 dc pf
dc reverse voltage ac reverse voltage
Performance characteristics of Universal Motor ac current I
dc current I
ac & dc voltage speed on fixed output loads of Universal Motor 3.75 20 10 30 40 50 60 70 80 90 100
3.76 3.77 3.78 3.79 3.8 3.81 3.82 3.83 3.84 3.85 ac50 N-m ac25 N-m dc50 N-m dc25 N-m 3.9 0
Fix Output load Effect on generated torque of ac/dc supply Universal Motor
torq for dc50 N-m torq for ac25 N-m Load
torq for dc25 N-m torq for dc0 N-m torq for ac0 N-m
20 40 60 80 100 120
3.905 3.91 3.915 3.92 3.925 torq for ac50 N-m
20 -20 0.71 40 -10 0 10 0.715 50
Different torques on ac voltage supply & 25 load
30 60
