Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 60, Problem 10SQ
To determine
Choose the option that represents the consequence for the given condition.
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Write general information about sequential timer for DC motor control
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3P
1P
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Figure 3 (c)
1. It is a machine that converts mechanical energy to electrical energy.
2. It is a machine that converts electrical energy to mechanical energy.
3. It is cylindrical or drum-shaped where the coils are placed and can either be lap wounded or wave wounded.
4. It connects the commutator to the other parts of the DC machine.
5. It serves as the housing of the dc machine.
6. True or False: The shunt field winding is part of the armature.
7. True or False: The long shunt compound generator is when the armature is in series with the series field winding and parallel to the shunt field winding.
8-10. Your newly built house needs an elevator. Which from the following will be best to use- series, shunt or compound motor and why?
Chapter 60 Solutions
Electric Motor Control
Ch. 60 - What are the three main electrical test...Ch. 60 - What is the advantage of a plunger-type voltage...Ch. 60 - A motor is tripping out on overload. The motor...Ch. 60 - A motor is tripping out on overload. The motor...Ch. 60 - Refer to the circuit shown in Figure 6016. The...Ch. 60 - Refer to the circuit shown in Figure 6016. Assume...Ch. 60 - Prob. 7SQCh. 60 - Prob. 8SQCh. 60 - Refer to the circuit shown in Figure 6016. If a...Ch. 60 - Prob. 10SQ
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- If a centrifugal switch assembly in a split-phase or capacitor motor fails, you'll most likely have a A. slowly turning motor.B. loudly humming motor.C. motor turning at too high a speed. D. motor that has reversed direction while running.arrow_forwardAnswer all or else skip the question pleasearrow_forwardPlease solution to this assignmentarrow_forward
- 20.a. A capacitive sensor is used to detect the presence of _______ objects.A. ferrousB. nonmovingC. nonconductiveD. magnetic20.b. A three-phase motor can be made to run backwards byA. connecting a resistor in series with the armature.B. reversing the control voltage connections.C. reversing three of its power leads.D. reversing two of its power leads.arrow_forwardTechnician A says when testing the voltage output, if the charging voltage is too high, the cause could be an open field wire from the regulator. Technician B says a loose or glazed drive belt could be the cause of too high charging voltage. Who is correct? A only B only Both A and B Neither A or B Technician A says that poor connection at the generator output wire can cause charging systems problems. Technician B says that many charging system circuits contain a circuit protection device. Who is correct? A only B only Both A and B Neither A or Barrow_forwardYou’re powering up a new motor in a brushless motor control system. After moving the shaft of the motor lightly left to right, the motor reverses direction and runs away. What’s the problem? A. Power transistor failureB. Wrong motor typeC. Reversed tachometerD. Reversed hall-effect sensorarrow_forward
- A step up chopper has an input of 200 volts and output of 250 volts. The blocking period is each cycle is 0.6x10-3 seconds. Find the period of conduction in each cycle and frequency of operation?arrow_forwardDraw a Start – Stop Full Voltage 3-phase AC Motor Starter circuit. The power circuit should be 220 V and the control circuit is 220V. Assume that the working voltage of the magnetic contactor is 220 V.arrow_forwardSelect the best answer for each of the following. If an operator pushes a start button on a three-phase induction motor and the motor starts to hum, but not run, the probable trouble is a. one fuse is blown and the motor is single phasing. b. the overload trip needs resetting. c. the auxiliary contact is shorted. d. one phase is grounded.arrow_forward
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