Question: P2.11 For electromechanical systems that require large power amplification, rotary amplifiers are often used [8, 19]. An amplidyne is a power amplifying rotary amplifier. An

P2.11 For electromechanical systems that require large power amplification, rotary amplifiers are often used [8, 19]. An amplidyne is a power amplifying rotary amplifier.

An amplidyne and a servomotor are shown in Figure P2.11. Obtain the transfer function

θ(s)/Vc (s), and draw the block diagram of the system.

Assume υd = k2iq and υq = k1ic .Rd id Ra La Control field La V12 Va i= Constant ic

Rd id Ra La Control field La V12 Va i= Constant ic V34 Vd + Constant speed wo 2 Motor Ve(s) (s) Load J, b R Amplidyne Ra FIGURE P2.11 Amplidyne and armature-controlled motor.

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