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1. For a home toaster suggest a closed loop control scheme to control the amount of browning on the toast.
2. Obtain the mathematical model of the OPAMP circuit shown in the Fig. 1.
3. In the Ward-Leonard speed control system shown in Fig. 2, the generator field time constant is negligible. It is driven at constant speed giving a generated voltage of K2 volts/filed amp. The motor is separately excited so as to have a counter end of Kb volts per rad/sec. It produces a torque of K. newton-m/amp. The motor and its load have a combined moment of inertia J Kg-m2 and negligible friction. The tachometer constant is K, volts per rad/sec and the amplifier gain is KA amps/volt. Draw the block diagram of this system and determine the transfer function co(s)/E,(s), where to is the load speed.
Given:
J=6 kg-m2 ICA=4 AN
K2=50 V/A 11.2= lit
K.=1.5 N-m/A K,=0.2 V per rad/sec
With the system originally at rest, a control voltage e,=100V is suddenly applied. Write MATLAB code to determine how the load speed will change with time.
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