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A dc motor is driven from a chopper with a source voltage of 24V dc and at a frequency of 1 kHz. Determine the variation in duty cycle required to have a speed variation of 0 to 1 p.u. delivering a constant 2 p.u. load. The motor details are as follows: 1 hp, 10V, 2500 rpm, 78.5 % efficiency, Ra=.01 O, La=.002 H, Kb= .03819 V/rad/sec. The chopper is one quadrant, and the on-state voltage drop across the device is assumed to be 1V regardless of the current variation.
A non inverting op-amp circuit with a gain of 96 V/V is found to have a 3-dB frequency of 8 kHz. For a particular system application, a bandwidth of 24 kHz is required. What is the highest gain available under these conditions
A negative feedback amplifier has a close-loop gain Af=100 and an open-loop gain A=105. What is the feedback factor If a manufacturing error results in a reduction of A to 103, what close-loop gain results
Determining how to use the function fft to find the DFT coefficients X[k] of x[n] in Matlab. Also, how would you plot the magnitude of X[k] in Matlab?
A system is described by the impulse response h(t) given in the following problems. Compute and plot the response of the system to the input signal x(t). (a) h(t) = t; 0
A bank of induction motors cosumes 36kW at 0.78pf lagging from a 60 Hz 240V RMS line. If 200μF of capacitors are placed in parallel with the load, what is the new power factor of the total load
an electric motor has an armture constant of 140, a flux of 25 mwh, an armuture current of 30 A , and a rotatio?nal speed of 1600 rpm. what is most nearly the power output in watt
what do u mean by term slip of three phase induction motor calculate the slip of 4-pole induction motor running at 1470 rpm while bieng connected to a 50 hz three phase source
Determine the magnitude of the current when the machine develops its maximum gross power with the excitation held constant.
Using VHDL, define a module called "mux 4 to 1" which implements a (4:1) multiplexer. The module should take in 4 data inputs called D3, D2, D1, and D0, and two select inputs called S1 and S0. It should have a single output called Y.
Suppose that an inductor is formed by N turns of a conductive wire wound around a magnetic material. The magnetic material forms a circular cylinder of radius r = 10 cm, and height h = 5 cm. The inductance of the inductor turns of N is defined as:..
In a feedback system, the forward path has a transfer function of the form G(s)=k/(1+s/Omega_p) and the feedback path has a gain of k_fb which is less than unity. Calculate the bandwidth of the closed-loop transfer function
Given a high or low pass RC or RL filter, indentify circuit characteristics such as AV, AVdB, AP, APdB, ZT, XT, and delete text at FC.
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