Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
1. The motor is now connected differentially compounded.
(a) If Radj = 175 Ω, what is the no-load speed of the motor?
(b) What is the motor's speed when the armature current reaches 20 A? 40 A? 60 A?
(c) Calculate and plot the torque-speed characteristic curve of this motor.
8-15. A 7.5-hp 120-V series dc motor has an armature resistance of 0.2 Ω and a series field resistance of 0.16Ω. At full load, the current input is 58 A, and the rated speed is 1050 r/min. Its magnetization curve is shown in Figure P8-5. The core losses are 200 W, and the mechanical losses are 240 W at full load. Assume that the mechanical losses vary as the cube of the speed of the motor and that the core losses are constant.
(a) What is the efficiency of the motor at full load?
(b) What are the speed and efficiency of the motor if it is operating at an armature current of 35 A?
(c) Plot the torque-speed characteristic for this motor.
A switch-mode dc-dc converter is operating at a switching frequency of 20kHz, and Vd=150V. The average current being drawn by the dc motor is 8.0 A. In the equivalent circuit of the dc motor, Ea=100V, Ra=0.25 ohm, and La=4mH.
Implement the circuit with a block diagram decoder (you don'tneed to show the internal implementation of the decoder) and OR gates only. A combinational circuit is specified by the following three Boolean functions
when the line was open-circuited, the measurement yielded an input impedance equivalent to a capacitor with capacitance of 40 pF. Find Zo of line, the phase velocity, and the relative permittivity of the insulating material.
A certain unity feedback control system has the closed-loop transfer function: T(s)= Y(s)/R(s)= (s/10+1)/((s/100+1)*(((s/20)^2)+s/20+1))) a) What is the estimated rise time b) What is the estimated overshoot
Determine the distance from a parabolic reflector of diameter D=10 m to the boundary of the far-field region. The antenna is being used to transmit a 4.1 GHz signal.
A silicon p-n-p transistor has impurity concentrations of 5*10^18, 2*10^17, and 10^16 cm^-3, diffusion constants of minority carriers 52, 40, and 115 cm^2/s and minority lifetimes of 10^-8, 10^-7, and 10^-6 in the emitter
Suppose a pure Si crystal has 5 × 1028 atoms m-3. It is doped by 1 ppm concentration of pentavalent As. Calculate the number of electrons and holes. Given that ni =1.5 × 1016 m-3.?
Sketch a set of iD-vDS characteristic curves for an NMOS Transistor operating with a small vDS. Let the MOSFET have k = 5ma/V^2 and Vt = 0.5V. Sketch and clearly label the graphs for VGS = 0.5,1.0,1.5,2.0, and 2.5V.
Find the potential energy of the system of 3 charges.
in the process of sampling an analog signal g(t) is multiplied by a periodic train of rectangular pulses c(t)each of unit area ,given that the pulse repetition frequency of this periodic train is fs and the duration of each rectangular pulse is T
Generate the Bode frequency response plots for your filter. Verify that your filter has the correct cutoff frequency - Find the pole locations and plot the pole locations in the s-plane.
What is the value of beta after the following code executes if the input is 5 int beta; cin >> beta; switch(beta){ case 5: beta += 5; case 1: beta++; case 5: beta += 5; break; case 4: beta += 4; }
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd