1. Single phase full converter is used to control the speed of separately excited DC motors. AC supply voltage is 208 V. Motor armature and field resistance are 0.5 2 and 345 2 respectively. The field current is also controlled by a full converter and the field current is set as the maximum possible value. Motor voltage constant is 0.7 V/A-rad/sec. If firing angle is 45° and armature current is 55 A, determine the angular speed of the motor. Assume armature and field current are ripple free. B 11 A 1= ●M

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1. Single phase full converter is used to control the speed of separately excited DC motors. AC supply
voltage is 208 V. Motor armature and field resistance are 0.5 and 345 N respectively. The field
current is also controlled by a full converter and the field current is set as the maximum possible
value. Motor voltage constant is 0.7 V/A-rad/sec. If firing angle is 45° and armature current is 55
A, determine the angular speed of the motor. Assume armature and field current are ripple free.
BI UGG G#:
= = = = = T ¶+ Σ
63
Transcribed Image Text:1. Single phase full converter is used to control the speed of separately excited DC motors. AC supply voltage is 208 V. Motor armature and field resistance are 0.5 and 345 N respectively. The field current is also controlled by a full converter and the field current is set as the maximum possible value. Motor voltage constant is 0.7 V/A-rad/sec. If firing angle is 45° and armature current is 55 A, determine the angular speed of the motor. Assume armature and field current are ripple free. BI UGG G#: = = = = = T ¶+ Σ 63
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