Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Chapter 38, Problem 8RQ
To determine
The solid state device is used to connect the load to the line when an output I/O controls DC voltage.
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Chapter 38 Solutions
Understanding Motor Controls
Ch. 38 - What industry first started using programmable...Ch. 38 - Name two differences between PLCs and common home...Ch. 38 - Name the four basic sections of a programmable...Ch. 38 - Prob. 4RQCh. 38 - What device is used to program a PLC?
Ch. 38 - What device separates the central processing unit...Ch. 38 - What is opto-isolation?
Ch. 38 - Prob. 8RQCh. 38 - Prob. 9RQCh. 38 - Prob. 10RQ
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- estion 1 The step resolution of a stepper motor is set for 1024 steps per revolution, Find the frequency to rotate at 60 rpm. (Give your answer in Hertz, put only numeric value) Question 3 A proportional valve is handled by an PWM signal Question 4 The speed of a stepper motor is controlled by Question 5 The relay is driven by an analog signal Question 6 Determine the output voltage from a PWM pin when the time ON is 25 ms and the frequency is 1kHz and Vcc-SV. (Put only a number in Volt, no need to add the unit word)arrow_forward2. In both circuits of this exercise the negative terminals of the sources are connected to ground. Is this a requirement for nodal analysis? What would happen to the node voltages if the positions of El and RI in Figure 7.1 were swapped?arrow_forward8. An R-L series circuit has a reactive power of 1234 VARs and an apparent power of 4329 VA. By how many degrees are voltage and current out of phase with each other? 9. An R-L series circuit contains a resistor and an inductor. The resistor has a value of 6.5 22. The circuit is connected to 120 V and has a current flow of 12 A. What is the inductive reactance of this circuit? 10. What is the voltage drop across the resistor in the circuit in Question 9? 11. A phase angle meter connected in an R-L series circuit indicates that the current is 28 degrees out of phase with the voltage. What is the circuit power factor? 12. An R-L series circuit has a power factor of 73%. If the apparent power is 560 kVA, what is the true power in the circuit?arrow_forward
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