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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.
(a) Draw the equivalent circuit. (b) Determine the ohmic value of the impedances. (c) Calculate the source current in amperes and in percent if the generator operating voltage is 3.8 kV (line-to-line) and a reactance of X=125% is connected in seri..
Consider a half-wave rectifier circuit with a triangular wave input of 5-V peak to peak amplitude and zero average, and with R=1kΩ. Assume that the diode can be represented by the constant-voltage-drop model with Vd=0.7V. Find the average value of..
An ideal transformer has five times more turns on the primary than the secondary. A0.1-H inductor and a 0.1uf capacitor are connedted in parallel across the secondary of the transformer.
A very long, tightly-wound solenoid has a circular cross section of radius r = 2.6 cm . The magnetic field outside the solenoid is negligible. Throughout the inside of the solenoid the magnetic field B is uniform, out of the page as shown, but var..
A Gaussian source with mean zero and variance 1 is to be transmitted via a channel that can provide a transmission capacity of 1 bit per each source output. a) what is the minimum mean-squared-error achievable
A unipolar 16 bit ADC measures 0 - 10 volts full scale. What is the minimum resolvable voltage What is the percent quantization error What is the percent quantization error if a 1 volt max signal is input
A three phase synchronous generator operates onto a grid bus of voltage 33 kv (line to line). The armature reactance of the machine is 2 ohms per phase and the leakage reactance is 3 ohms per phase.
1)Why BJT is called a bipolar and current controlled device 2)What are the different modes of operation in BJT and in which region it act as an amplifier 3)Why Emitter is highly doped ,base lightly doped and collector moderately doped
Calculate the amount of work done if the process is considered to be polytropic. Assume the temperature to be 273K and the value of k for the process to be 1.4. All losses are neglected.
find the spectrum of the signal s(t) that results from the use of natural sampling,assuming that time t=0 corresponds to the midpoint of a rectangular pulse in c(t). show that the original signal m(t) may be recovered exactly from its naturally sa..
A 450 piece/hr 10 hr B 500 piece/hr 8 hr A set of unsharpen ed tools costs $1,500 and can be ground 15 times. The cost of each grinding is $20. The time required to change and reset the tools is 2 hours, and such changes are made by a tool-setter.
Control Systems and Laplace Transformations, What is the step response of a system whose transfer function has a zero at -1, a pole at -2 and a gain factor of 2?
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