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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. Point charges, each of √4πε 0 C, are located at the vertices of an equilateral triangle of side a. Determine the electric force on each charge.
How does a Mach-Zehnder Modulator work in Silicon?
Q. Basic working of optical coupler? The optical coupler is suitable for frequencies in the low megahertz range. The photodiode type shown above can handle only small currents;
what is that mean and explain
Explain IMUL instructions in 8086 family with example and their effect on flag. IMUL: It is an instruction for multiplication of two signed numbers. This result is a signed
Q. Athree-phase, 60-Hz substation bus supplies two wye-connected loads that are connected in parallel through a three-phase feeder that has a per phase impedance of 0.5 + j2 . Loa
duality of x+y''
Circuit with capacitive load Capacitors which obey the relationship of equation are linear capacitors, since the potential difference among the conductive surfaces is linearly
There is a requirement to propose a new ASIC design flow within your company, from VHDL design capture through to GDSII tape out. It is very important that the flow includes all t
DAD Double Add Instruction The contents of register R P are added to the contents of HL register pair and results of addition is stored in HL register pair. R P may b
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