Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 47, Problem 1SQ
To determine
Explain the origin of DC power for the DC motor.
Expert Solution & Answer
Explanation of Solution
DC motors are highly used in industries due to its versatility property. DC motors provide torque at a low speed. Even at the nameplate speed or above the nameplate speed, the motor can be operated constantly. DC power supply is required to operate the DC motor.
Due to the wide use of solid state rectifiers, a DC power plant and the distribution system is not required to develop the DC power. In AC distribution system, AC power can be rectified to DC power by using the solid state electronic devices at the motor site.
Conclusion:
Thus, the origin of DC power for the DC motor is explained.
Want to see more full solutions like this?
Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Assume a JFET device with VGS(0) = -1.3 and ipss = 20 mA. Design a self-biased
(Fig. 2) JFET common-source amplifier with the gain of -2 and a DC biasing that
allows the largest swing in ip. Note that you can choose Vcc to arrive at a desired
RD to meet the gain requirement. Since you are designing for a given gain, you
may have to check to see if JFET is biased correctly. (Hint: First find Rs for correct
VGs and then use the gain to compute RD. Finally, use RD and Rs to determine
Vcc). Assume that the amplifier is to interface a source that expects a load of 50
. Also, assume that the amplifier circuit is AC coupled at both ends with 3 dB
corner frequency of 15 kHz.
Rearrange the circuit in step 1 to implement a common-drain amplifier. Do note
that the output capacitor (C2) must be redesigned as the output impedance of
common-drain is different from that of common-source amplifier. What is the
actual gain? What is the input impedance?
Assume a JFET device with VGS(0) = -1.3 and ipss = 20 mA. Design a self-biased
(Fig. 2) JFET common-source amplifier with the gain of -2 and a DC biasing that
allows the largest swing in ip. Note that you can choose Vcc to arrive at a desired
RD to meet the gain requirement. Since you are designing for a given gain, you
may have to check to see if JFET is biased correctly. (Hint: First find Rs for correct
VGs and then use the gain to compute RD. Finally, use RD and Rs to determine
Vec). Assume that the amplifier is to interface a source that expects a load of 50
2. Also, assume that the amplifier circuit is AC coupled at both ends with 3 dB
corner frequency of 15 kHz.
help on this question about induction motors?
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
- The MATLAB code is going well but the last part in bandpass, the legend that is supposed to tell the color of both lower and upper-frequency cutoff does not align with each other. As such I need help My Matlab code: % Define frequency range for the plot f = logspace(1, 5, 500); % Frequency range from 10 Hz to 100 kHz w = 2 * pi * f; % Angular frequency % Parameters for the filters R = 1e3; % Resistance in ohms (1 kΩ) C = 1e-6; % Capacitance in farads (1 μF) L = 0.1; % Inductance in henries (chosen for proper bandpass response) % Compute cutoff frequencies f_cutoff_RC = 1 / (2 * pi * R * C); % RC low-pass/high-pass cutoff f_resonance = 1 / (2 * pi * sqrt(L * C)); % Resonant frequency of RLC Q_factor = (1/R) * sqrt(L/C); % Quality factor of the circuit % Band-pass filter cutoff frequencies f_lower_cutoff = f_resonance / (sqrt(1 + 1/(4*Q_factor^2)) + 1/(2*Q_factor)); f_upper_cutoff = f_resonance / (sqrt(1 + 1/(4*Q_factor^2)) - 1/(2*Q_factor)); % Define Transfer Functions H_low =…arrow_forwardThe MATLAB code is going well but the last part in bandpass, the legend that is supposed to tell the color of both lower and upper-frequency cutoff does not align with each other. As such I need help My Matlab code: % Define frequency range for the plot f = logspace(1, 5, 500); % Frequency range from 10 Hz to 100 kHz w = 2 * pi * f; % Angular frequency % Parameters for the filters R = 1e3; % Resistance in ohms (1 kΩ) C = 1e-6; % Capacitance in farads (1 μF) L = 0.1; % Inductance in henries (chosen for proper bandpass response) % Compute cutoff frequencies f_cutoff_RC = 1 / (2 * pi * R * C); % RC low-pass/high-pass cutoff f_resonance = 1 / (2 * pi * sqrt(L * C)); % Resonant frequency of RLC Q_factor = (1/R) * sqrt(L/C); % Quality factor of the circuit % Band-pass filter cutoff frequencies f_lower_cutoff = f_resonance / (sqrt(1 + 1/(4*Q_factor^2)) + 1/(2*Q_factor)); f_upper_cutoff = f_resonance / (sqrt(1 + 1/(4*Q_factor^2)) - 1/(2*Q_factor)); % Define Transfer Functions H_low =…arrow_forward1° ⑤ Aa "Human-written solution required" 2. Using the characteristics of Fig. 6.11, determine ID for the following levels of VGs (with VDS > VP): a. VGs = 0V. b. VGs=-1 V. c. VGs -1.5 V. d. VGS -1.8 V. e. VGS = -4 V. f. VGs=-6V. 3. Using the results of problem 2 plot the transfer characteristics of ID vs. VGS- 4. a. Determine Vps for VGs = 0V and Ip = 6 mA using the characteristics of Fig. 6.11. b. Using the results of part (a), calculate the resistance of the JFET for the region Ip = 0 to 6 mA for VGs =0V. c. Determine Vps for VGS = -1 V and ID = 3 mA. d. Using the results of part (c), calculate the resistance of the JFET for the region ID = 0 to 3 mA for VGs -1 V. e. Determine Vps for VGs = -2 V and ID = 1.5 mA. f. Using the results of part (e), calculate the resistance of the JFET for the region ID = 0 to 1.5 mA for VGS-2 V. g. Defining the result of part (b) as ro, determine the resistance for VGs -1 V using Eq. (6.1) and compare with the results of part (d). h. Repeat part (g)…arrow_forward
- ① Esterfication + R'on R Hydrolysis OH Alcohol A. 0-R Carboxylic Acid Ester NOD-10arrow_forward4. a. Determine VDs for VGS = 0 V and ID = 6 mA using the characteristics of Fig. 6.11. b. Using the results of part (a), calculate the resistance of the JFET for the region ID = 0 to 6 mA for VGS = 0 V. c. Determine VDs for VGS = -1 V and ID = 3 mA. d. Using the results of part (c), calculate the resistance of the JFET for the region ID = 0 to 3 mA for VGS = -1 V. e. Determine VDs for VGS = -2 V and ID = 1.5 mA. f. Using the results of part (e), calculate the resistance of the JFET for the region ID = 0 to 1.5 mA for VGS = -2 V. g. Defining the result of part (b) as ro, determine the resistance for VGS = -1 V using Eq. (6.1) and compare with the results of part (d). h. Repeat part (g) for VGS = -2 V using the same equation, and compare the results with part (f). i. Based on the results of parts (g) and (h), does Eq. (6.1) appear to be a valid approximation?arrow_forwardA. Using D flip-flops, design a logic circuit for the finite-state machine described by the state assigned table in Fig. 1. Present Next State State Output x=0 x=1 Y2Y1 Y2Y1 YY Z 00 00 01 0 01 10 11 888 00 10 0 00 10 1 00 10 1 Fig. 1arrow_forward
- Athree phase a.c. distributor AB has: A B C The distance from A to B is 500 m. The distance from A to C is 800 m. The impedance of each section is (6+j 8) /km. The voltage at the far end is maintained at 250 volt. Find: sending voltage, sending current, supply power factor and 80A 60 A total voltage drop. 0.8 lag. P.f 0.6 lead. p.farrow_forwardengineering electromagnetics Subjectarrow_forwarda ADI ADI b Co ADDS D Fig.(2) 2-For resistive load, measure le output voltage by using oscilloscope; then sketch this wave. 3- Measure the average values ::f V₁ and IL: 4- Repeat steps 2 & 3 but for PL load.arrow_forward
- Determine the type of media In a certain medium with µ = o, & = 40 H = 12ely sin(x x 10% - By) a, A/m A plane wave propagating through a medium with ɛ, = 8, μ, = 2 has E = 0.5 3sin(10°t - Bz) a, V/m. Determine In a certain medium - E = 10 cos (2 x 10't ẞx)(a, + a.) V/m If μ == 50μo, & = 2ɛ, and o = 0, In a medium, -0.05x E=16e sin (2 x 10% -2x) a₂ V/marrow_forward"How can I know if it's lossless or lossy? Is there an easy way?" A plane wave propagating through a medium with &,,-8 μr = 2 nas: E = 0.5 ej0.33z sin (10' t - ẞz) ax V/m. A plane wave in non- · (Mr=1) has: magnetic medium E. 50 sin (10st + 27 ) ay v/m =arrow_forwarda A DI AD: AD, b C ADDS AD Fig.(2) LOIT 4-Draw the waveform for the c:t. shown in fig.(2) but after replaced Di and D3 by thyristors with a 30° and a2 #90°.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage Learning
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Cengage Learning