Concept explainers
Whether the motor in Figure 35-1 is started in medium or high speed and explain why.

Answer to Problem 1SQ
No, the motor in Figure 35-1 cannot be started in medium or high speed.
Explanation of Solution
Refer to Figure 35–1 in the textbook shows the push-button speed selection for a wound rotor motor permits three steps of speed. In this circuit, the motor must be allowed to start at low speed and progress to second speed and then, to high speed. When the motor is operating at high speed, the motor speed can be reduced to a slower speed by pushing the suitable speed push button.
The motor is started at low speed by pressing a low speed push button and the coil M gets energized. This causes the power to be supplied to the stator winding of motor through the load contacts M. Due to that, the motor starts slowly with full resistance available in the secondary circuit. In Figure 35-1, the motor cannot be started in high or medium because it is interlocked with the low push button and the maintaining contact M.
Conclusion:
Thus, the motor in Figure 35-1 cannot be started in medium or high speed.
Want to see more full solutions like this?
Chapter 35 Solutions
EBK ELECTRIC MOTOR CONTROL
- A robot gripper is shown on Fig.1a. The block diagram of the control system is shown in Fig.1b. This system is conditionally stable because it is stable only for a range of the gain K. Using the Routh-Hurwitz criterion method to determine the range of gain for which the system is stable. Find the steady-state error due to unit step input. Sketch the root locus of the system and analyze its stability. Find the value of K so that the phase margin is minimum, and record the values of the phase margin, gain margin, Mr, and BW. Then draw the Bode plot of the system and discuss its stability using the Nyquist stability method. What is the value of this maximum overshoot for both large and small values of K due to unit step input? Draw the response of the open-loop and closed-loop of the system according to the unit step system for k=15, 25, 50. Discuss how to improve the system response if needed.arrow_forwardPlease show the stepsarrow_forwardDon't use ai to answer I will report you answerarrow_forward
- Derive the transfer functions C'A(s)/T'(s) and T'(s)/C'A0(s). show step by step and write them out so they are easy to read. thank youarrow_forward4) Find the Norton equivalent of the following circuit. 5 µF 4 cos(200t+30°) A ele 10 H www 2 ΚΩ barrow_forwardDon't use ai to answer I will report you answerarrow_forward
- Q1. Consider the unity feedback control system whose open-loop transfer function is: G(s) = = 40(S + 2) s(s+3)(s + 1)(s + 10) hod of Ziegler-Nichols. By using second method of Ziegler- Nichols, calculate the PID, PI-D and I-PD parameters and make tuning for this for this parameters to get accepting response for the following system, then compare your results for all types controllers? GINarrow_forward1) Use the method of source transformation to find Ix in the following circuit. ΖΩ j4Ω wwwm -j20 60/0° V(+ 602 www 492 -j30 wwwarrow_forwardDon't use ai to answer I will report you answerarrow_forward
- 3) The sinusoidal voltage source in the following circuit is given by vg = 22.36 cos(5000t + 26.565°) V. Obtain the Thevenin equivalent of the circuit with respect to the terminals a, b. 50 mH Vg 250 Ω 400 nF 50 mH a barrow_forward2) Use the method of source transformation to find Vo in the following circuit. 102 w j30 0.202 10.6 Ω w m ΦΩΣ 10 Ω 40/0° V Vo -j352 -j19arrow_forwardThe distribution function for a random variable X is - F(x) = { 1 − e−²x² x ≥ 0 .Find a) the density function b)the probability x 2 and c) the probability that -3arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
- Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage Learning

