Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Chapter 10, Problem 1RQ
Explain the difference between inching and jogging.
Expert Solution & Answer
To determine
The difference between inching and jogging.
Explanation of Solution
Jogging:
Jogging is to start a motor with short nudges of power at full voltage. Jogging should not exceed 5 times in a minute and if frequently done, the starter of the motor will be de-rated.
Inching:
Inching is similar to jogging but at reduced voltage. Inching is to start a motor with short nudges of power at reduced voltage.
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A 48-kg iron block and a 76-kg copper block, both initially at 80°C, are dropped into a large lake at 15°C. Thermal equilibrium is established after a while as a result of heat transfer between the blocks and the lake water. Determine the total entropy change for this process. The specific heat of iron at room temperature is cp = 0.45 kJ/kg·K. The specific heat of copper at 27°C is cp = 0.386 kJ/kg·K.
The total entropy change for this process is kJ/K.
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Air at 4.4 MPa and 500°C is expanded in an adiabatic gas turbine to 0.2 MPa. Calculate the maximum work that this turbine can produce in kJ/kg. Use the table containing the ideal gas specific heats of various common gases.
The maximum work that this turbine can produce is kJ/kg.
Chapter 10 Solutions
Understanding Motor Controls
Ch. 10 -
Explain the difference between inching and...Ch. 10 - What is the main purpose of jogging?Ch. 10 - Refer to the circuit shown in Figure 108. In this...Ch. 10 - Refer to the circuit shown in Figure 109. In this...Ch. 10 - Refer to the circuit shown in Figure 107. Assume...Ch. 10 - Prob. 6RQCh. 10 - Prob. 7RQ
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