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Since dc motors of various types are used extensively in control systems, it is essential for analytical purposes that we establish a mathematical model for the dc motor. Let us consider the case of a separately excited dc motor with constant field excitation. The schematic representation of the model of a dc motor is shown in Figure. We will investigate how the speed of the motor responds to changes in the voltage applied to the armature terminals. The linear analysis involves electrical transients in the armature circuit and the dynamics of the mechanical load driven by the motor. At a constant motor field current If, the electromagnetic torque and the generated emf are given by
Te = Kmia
ea = Kmωm
where Km = kIf is a constant, which is also the ratio ea/ωm. In terms of the magnetization curve, ea is the generated emf corresponding to the field current If at the speed ωm. Let us now try to find the transfer function that relates m(s) to Vt(s).
Q. Illustrate the principles of operation of centralized SPC and distributed SPC and compare their performance. Ans: In centralized control, all control equipment is replac
Q. (a) Excess-3 code is a 4-bit binary code for the 10 decimal digits and is found useful in digital computer arithmetic. Each combination is found by adding 3 to the decimal nu
Q. Explain about Stored Program Control? Stored Program Control: In centralized control, all control equipment is replaced by a single processor which should be quite powerf
Now you have to digitally implement this circuit. Compute a difference equation which if you implement will behave exactly like this circuit.
what is rom
Consider the circuit in Figure (a), which include a controlled source, and find the current in the 5-V source and the voltage across the 5- resistor by using (a) the loop-current
INS Increment Register Pair Instruction Contents of the registers pair R P will be incremented by one and the result will be stored in the same register pair. It is
I need help in Simulink model (.mdl) (discrete) for the topic “sensorless control of the pmsm using Back EMF method” with detailed explanation of the estimator (Back EMF method).
What do you mean by Circuit Analysis Techniques? One simplifying technique often used in complex circuit problems is that of breaking the circuit into pieces of manageable
List four sources of information which are essential to the designer of this electrical installation.
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