Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Question
Chapter 54, Problem 4RQ
To determine
The average output impedance of a 741 operational amplifier.
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4. A circuit contains a 20-2 resistor and
an inductor with an inductance of
0.093 H. If the circuit has a frequency
of 60 Hz, what is the total impedance
of the circuit?
5. An R-L series circuit has a power
factor of 86%. By how many degrees
are the voltage and current out of
phase with each other?
6. An R-L series circuit has an apparent
power of 230 VA and a true power of
180 W. What is the reactive power?
7. The resistor in an R-L series circuit
has a voltage drop of 53 V, and the
inductor has a voltage drop of 28 V.
What is the applied voltage of the
circuit?
In the experiment No.4, the core loss component current is given by_
Ic Sinôo
lo Sindo
lc Cos&o
lo Coso
9. Identify the resistance of
5 point
the Following Five Band
Resistor *
60M Ohms +5%
O 4000K Ohms +5%
O 2000K Ohm +5%
Chapter 54 Solutions
Understanding Motor Controls
Ch. 54 - Prob. 1RQCh. 54 - Prob. 2RQCh. 54 - Prob. 3RQCh. 54 - Prob. 4RQCh. 54 - Prob. 5RQCh. 54 - Prob. 6RQCh. 54 - Name two effects of negative feedback.Ch. 54 - Refer to Figure 548. If resistor R1 is 200 ohms...Ch. 54 - Refer to Figure 54–9. If resistor R1 is 470 ohms...Ch. 54 - What is the purpose of the hysteresis loop when...
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- Refer to Figure 54–9. If resistor R1 is 470 ohms and resistor R2 is 47 kilohms, what is the gain of the amplifier? Figure 54-9 Inverting amplifier connection.arrow_forwardRefer to Figure 548. If resistor R1 is 200 ohms and resistor R2 is 10 kilohms, what is the gain of the amplifier? Figure 548 Noninverting amplifier connection.arrow_forward?What is the gain of the system (output/input) given below 2 input output 12 3 1/4 no one of these 36 -10 zero 90 13arrow_forward
- Given the following Resistances and Inductors in Series and Voltage Source: R1 = 1,664 ohms R2 = 1,999 ohms L1 = 2 Henry L2 = 2 Henry Vs = 3 Volts Frequency = 92 Hz What is the Total Impedance (Amplitude) in ohms?arrow_forwardThe input power to a 3-phase load is measured as 6700 watts. If the line voltage and line current to the load are 430 V and 18 A respectively. The power factor of the System is,arrow_forwardIf the impedance Z1 = 10 +j10 and the impedance Z2 = 10 - j0 are connected in series, the equivalent impedance would be: O A. 20-j10 ohms O B. 20+ j20 ohms O C. None of the other choices are correct O D. 20 ohms O E. 20+ j 10 ohmsarrow_forward
- Example 7-3. A 460-V, 25-hp. 60-Hz, four-pole, Y-connected induction motor has the following impedances in ohms per phase referred to the stator circuit: - 0.641n X,-1.106 N R2 - 0.332 N X2 = 0.464 XM - 26.3 N The total rotational losses are 1100 W and are assumed to be constant. The core loss is lumped in with the rotational losses. For a rotor slip of 2.2 percent at the rated voltage and rated frequency, find the motor's (a) Speed (b) Stator current (c) Povwer factor (d) Peony and Pout (e) Tiad and Toad Efficiencyarrow_forwardA sine wave has a RMS value of 12 V. Determine the following values: 1) Peak to peak 2) Peak 3) Average value 4) Instantaneous value at the 40° reference point on the horizontal axisarrow_forwardQuestion 5 The impedance matrix [Z (iw)], can be used to determine the solution as: X = [Z(iw)]-¹Fo b. X = [Z(iw)]Fo c. X= [Z(iw)] Xo Question 6 The mass matrices stiffness and damping of a system with two degrees of freedom are symmetrical. Choose an option: True Falsearrow_forward
- Calculate the Resistance , if the RTD temperature is 2506.8 oC and Sensitivity is 9.6 oC/ohmarrow_forwardQ4 Find V1 and V2 in the circuit shown below. Also calculate 11 and 12, and the power dissipated in the 120 And 400 resistors. 15 V 12 Ω ww + 60 ww www. 10 Ω + www iz 40 Ωarrow_forwardThe following data were obtained on a 50 kVA 2400/120 V transformer: Open circuit test, instruments on low voltage side: Waltmeter reading = 396 Watts Ammeter reading = 9.65 amperes Voltmeter reading = 120 Volts Short circuit test, instruments on high voltage side: Waltmeter reading = 810 Watts Ammeter reading = 20.8 amperes Voltmeter reading = 92 Volts Find the efficiency when rated kVA is delivered to a load having a power factor of 0.8 lagging.The following data were obtained on a 50 kVA 2400/120 V transformer : Open circuit test, instruments on low voltage side: Waltmeter reading = 396 Watts Ammeter reading = 9.65 amperes Voltmeter reading = 120 Volts Short circuit test, instruments on high voltage side: Waltmeter reading = 810 Watts Ammeter reading = 20.8 amperes Voltmeter reading = 92 Volts Find the efficiency when rated kVA is delivered to a load having a power factor of 0.8 lagging.arrow_forward
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Understanding Motor ControlsMechanical EngineeringISBN:9781337798686Author:Stephen L. HermanPublisher:Delmar Cengage Learning
Understanding Motor Controls
Mechanical Engineering
ISBN:9781337798686
Author:Stephen L. Herman
Publisher:Delmar Cengage Learning