Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 4, Problem 14SQ
When reading a schematic diagram, are the control components shown as they should be when the machine is turned off or de-energized, or are they shown as they should be when the machine is in operation?
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
A) Suppose you were desiging a circuit that required two LEDs for "power on" indication. The power supply voltage is 5 volts, and each LED is rated at 1.6 volts and 20 mA. Calculate the dropping resistor sizes and power ratings:
B) After doing this, a co-worker looks at your circuit and suggests a modification. Why not use a single dropping resistor for both LEDs, economizing the number of components necessary?
Re-calculate the dropping resistor ratings (resistance and power) for the new design. Include the total power consumed by the circuit and the power delivered by the source.
S
A
L
ined sove in peaper
۳/۱
16852
Alternator has star-connected,4-pole, 50 Hz as the following data:
Flux per pole-0.12 Wb; No. of slot/pole/phase-4; conductor/slot-4; Each coil spans 150°
(electrical degree) pitches
Find (i) number of turns per phase (ii) distribution factor (iii) pitch factor (iv) no-load phase
voltage (v) no-load line voltage.
2ci25
750
r
2.01
४
A) Complete the table of values for this circuit:
B) Draw the schematic include polarity
Chapter 4 Solutions
Electric Motor Control
Ch. 4 - Identify the following symbols.Ch. 4 - Electrical symbols usually conform to which...Ch. 4 - What do the following abbreviations stand for? a....Ch. 4 - Single-pole and double-pole switch symbols are...Ch. 4 - The symbol shown is a a. polarized capacitor. b....Ch. 4 - The symbol shown is a a. normally closed float...Ch. 4 - The symbol shown is a(n) a. iron core transformer....Ch. 4 - The symbol shown is a a. normally open pressure...Ch. 4 - The symbol shown is a a. double-acting push...Ch. 4 - If you were installing the circuit in Figure 412,...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- (choose R1, R2, R3, R4, R5 and assume that 300 β = , all resistors must be greater than zero) such that the following specifications are met: • Minimum open loop gain, Aol, 40dB (can be more, this is the minimum requirement) • Input current (at input terminals) <1uA • Power dissipation DC P ≤20mW • VCC=10V, VEE=0VI NEED HELP, I WANT ONLY TO CALCULATE THE RESISTORSarrow_forward80 V 300 Ω t = 0 500 i(t) Vc(t) 40 nF 2,5 mH -arrow_forwardProblem 1: Two-Force Equilibrium A 12 kg traffic light is suspended by two cables attached to a ceiling. Determine the force in Cable 1 (AB) and Cable 2 (AC). In other words, determine the tension in each cable, assuming the system is in static equilibrium. Barrow_forward
- If the Z-axis changes, what is the effect A circularly polarized wave, traveling in the +z-direction, is received by an elliptically polarized antenna whose reception characteristics near the main lobe are given approx- imately by E₁ = (2â, + jâ] f(r. 8. d) Find the polarization loss factor PLF (dimensionless and in dB) when the incident wave is (a) right-hand (CW) (b) left-hand (CCW) An elliptically polarized wave traveling in the negative z-direction is received by a circularly polarized antenna. The vector describing the polarization of the incident wave is given by Ei= 2ax + jay .Find the polarization loss factor PLF (dimensionless and in dB) when the wave that would be transmitted by the antenna is (a) right-hand CP (b) left-hand CP.arrow_forwardMedium 1 is a lossless dielectric (ε₁=ε,ε, μ₁=μ₁, σ₁=0) Medium 2 is a lossless dielectric (ε=&&₂, μ=μ₁, σ₁=0) [бг Мо о = = 0] [2 Mo σ₂ = 0] E₁ (z) = Ele² + Пe+jB₁²] E2 (z) = E Te² and tot = constant 1. For the case εr1 = 1, &r2= 16, E₁x=1 V/m and a frequency f = 750 MHz determine: λι = n₁ = 22 = n2= r = T= 2. The magnitude |E1 tot (z)| will show an interference pattern in region 1 as: E˜(z)=E,{1+Te®®]e¯MS =E||{1+Te^^^^\]e=##} | = |E|+Texp(j) For an incident field E₁x=1 V/m SKETCH the magnitude of E1 tot (z)| and |E20 (z) on the graph below. Plot the values at 2/4 increments and sketch between. What is the SWR?arrow_forwardPlease don't use AIarrow_forward
- Please don't use AIarrow_forward3) In the ideal autotransformer circuit shown below find 11, 12 and lo. Find the average power delivered to the load. (hint: write KVL for both sides) 20/30° V(+ 2-1602 200 turns V₂ 10 + j40 Ω 80 turns V₁arrow_forward11-2) Now consider that white noise (i.e., noise with a PSD that is constant with frequency) is introduced in the channel of the system described in the previous problem. An ideal low pass filter is used at the receiver input to reduce the noise as much as possible, while transmitting the desired signal. (a) By what factor should the cutoff frequency of the noise reduction filter be reduced in the 16-PAM case, compared to binary? (b) By what factor will the noise power at the decision circuit be reduced in the 16-PAM case? (c) By what factor will the noise amplitude at the decision circuit be reduced in the 16-PAM case? (d) To obtain the same symbol error rate for 16-PAM as for binary, how should the minimum level spacing for 16-PAM compare to binary? (e) If the 16-PAM level spacing is adjusted according to part (d) above, by what factor will the average signal power be increased in the 16-PAM case, compared to binary?arrow_forward
- 11-1) similar to Lathi & Ding, Prob. P.6.7-5 Data at a bit rate Rb must be transmitted using either binary NRZ polar signaling or 16-ary PAM NRZ polar signaling. (a) By what factor will the symbol rate be reduced in the 16-PAM case? (b) By what factor will bandwidth required from the (lowpass) channel be reduced in the 16-PAM case? (c) Assuming the minimum spacing between pulse levels must be the same in both cases, by what factor will the average power be increased in the 16-PAM case? [Hint: take the pulse amplitudes to be ±A in the binary case, and ±A, ±3A, ±5A,..., ±154, and recall that scaling pulse amplitude by a factor k scales the pulse energy by a factor R². Assume that the data is random, so that all 16 levels are equally likely, and that the same pulse shape is used in both cases.] Warning: Solutions to the textbook problem that are posted online are mostly wrong. Work it out for yourself.arrow_forward11-3) similar to Lathi & Ding, Prob. P.6.8-1 Consider the carrier modulator shown in the figure below, which transmits a binary carrier signal. The baseband generator uses polar NRZ signaling with rectangular pulses. The data rate is 8 Mbit/s. (a) If the modulator generates a binary PSK signal, what is the bandwidth of the modulated output? (b) If the modulator generates FSK with the difference fel - fco = 6 MHz (cf. Fig 6.32c), determine the modulated signal bandwidth. Binary data source Baseband signal generator Modulated output Modulator N-E---arrow_forwardFor the circuit shown, find (i) closed-loop voltage gain (ii) Z i of the circuit (iii) f_max. The slew rate is 0.6V/us. ((write your answer in Kilo ohm)) 2Vpp R ww 20 kQ R₁ ww 200 ΚΩ 9+18 V - 18 V 10 kn R₁₂ ΚΩ ((write your answer in KHz))arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Lead and lag compensation using Bode diagrams; Author: John Rossiter;https://www.youtube.com/watch?v=UBE-Tp173vk;License: Standard Youtube License