Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 31, Problem 9SQ
What is meant by the “compelling action” produced by an accelerating relay?
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Chapter 31 Solutions
Electric Motor Control
Ch. 31 - Excluding slip, at what speed (r/min) will an...Ch. 31 - What is meant by the description separate winding...Ch. 31 - Prob. 3SQCh. 31 - Prob. 4SQCh. 31 - In Figure 314, what does the broken line between...Ch. 31 - When the high button is depressed in Figure 314,...Ch. 31 - Which coils are energized immediately when the...Ch. 31 - At what speed can a four-pole, 240-volt, 5-hp,...Ch. 31 - What is meant by the compelling action produced by...Ch. 31 - Prob. 10SQ
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- Don't use ai to answer I will report you answerarrow_forwardtype (o) bT S+αT Profational controller a = b = 5, T-La |kp| 50 5+50 kp=20,50,70 ② type (1) bT 5(stat) a=b=5,T= 1 ✓ KT 5 SC5+5 kp=20, 50, 70 (Find Wny, ess for type (a) and (1))arrow_forward2. Write an expression of the two sinusoidal voltage waveforms whose effective value is 7.071 V and whose phase difference is 90 degrees. Draw the phasor of those two sinusoidal waveforms in the complex plane.arrow_forward
- 2. Determine developed torque and shaft torque of 220-V, 4-pole series motor with 800 conductors wave-connected supplying a load of 8.2kW by taking 45A from the mains. The flux per pole is 25 mWb and its armature circuit resistance is 0.60. Ans.[143.25 Nm, 135.25 Nm]arrow_forward7. resistance): The practical capacitor can be simplified as the model below (ESR: equivalent series 10 μF ESR W From a datasheet, it is known that a 10 µF aluminum electrolytic capacitor has an impedance of 2800 mOhm at the 100 kHz testing condition. (1) Calculate the ESR under the above testing condition; (2) Calculate the phase shift between the voltage and current at 100 Hz and 10k Hz sinusoidal excitation conditions.arrow_forward5. A circuit has the following AC sources: y₁ = 5 cos(wt + 30°), y₂ = 4 cos(2wt + 120°), y3 = 3 cos(4wt - 60°), y4 = 6 cos(2wt - 120°), y = 2√2cos(wt - 60°): (1) Identify fundamental sources and harmonics. (2) Using phasor approach to simplify y₁ + y2 y3 y4 y5 as much as possible.arrow_forward
- 6. A practical 10 μH wire wounded inductor has a series parasitic resistance of 0.4 Ohm, as shown in the figure below. a 10 pH 0.4 Ω W° b If an AC current y₁ = 4cos (20πt + 60°) is supplied to this inductor, (1) calculate the voltage across the inductor terminals a and b. (2) express the inductor terminal voltage and current in the complex plane. (3) calculate the phase shift between inductor terminal voltage and current If an AC current y₂ = 4cos (2000лt + 60°) is supplied to this inductor, (4) calculate the voltage across the inductor terminals a and b. (5) express the inductor terminal voltage and current in the complex plane. (6) calculate the phase shift between inductor terminal voltage and currentarrow_forward1. As shown below, an LED lightbulb is connected to the grid power. The LED lightbulb has a rated power of 15 W, and the gird voltage is 120 V 60 Hz. Based on the above information (1) what is the peak value and effective value of the current flowing through the LED light bulb, (2) write an expression of the current flowing through the LED light bulb.arrow_forwardQ4: Determine the reactions at support A in structure shown in figure below. 4 kN/m 2.5 kN/m 9 m 4 marrow_forward
- 4. A circuit has three AC sources: y₁ = 5cos(wt + 30°), y2 = 4cos(wt + 120°), y3 2cos(wt 60°), calculating: = (1) y₁ + y2 y3, and express the addition in the complex plane using phasors. (2) y1 y2 y3, and express the subtraction in the complex plane using phasorsarrow_forwardDon't use ai to answer I will report you answerarrow_forwardA 50-HP, 600-V compound motor, taking 80 A, operates at a speed of 495 r.p.m. at full-load. If the flux per pole is 9.1 x 106 Maxwells and the armature resistance is 0.01502, the field resistances are 0.006 ohms and 300 ohms. Calculate: a. Field currents and the armature current b. the counter emf c. the rotational loss Ans.[2A,78A,593.362 V,8982.236 W]arrow_forward
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