Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 1, Problem 5SQ
To determine
Choose the best option that represents the general purpose of motor control.
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- Explain the characteristics and how the following motor starters work. 1.Slip Ring a. Variable Resistance b. Fixed Starting Resistancearrow_forward3) A In which of the following application DC series motor is used: A. Centrifugal Pump B. Motor Operation in DC and AC C. Water pump drive D. Starter for car E. All abovearrow_forwardBy drawing a general control block diagram for an electric motor, Explain the basics of motor control. please write it with computer to get what you will write thanks alotarrow_forward
- Motors have many uses. Describe a motor you have experience with. What is it being used for, what power source it uses, and possibly it’s configuration. Explain why you picked this motor and if you have/need to perform(ed) any maintenance on it.arrow_forward3.a. Which one of the following motor types uses permanent magnets in the armature or rotor?A. Stepper motorB. PM motorC. Pancake motorD. PM servo motor3.b. A type of resistance device that can be placed in a DC motor circuit and varied to limit the speed of amotor is called aA. power resistor.B. rheostat.C. potentiometer.D. variable reluctor.arrow_forwardState the correct terminology used to describe each of the following 1.the current drawn by a motor at standstill with the rate voltage and frequency applied. 2.the twisting or turning force of a motor . 3.the deference in speed between the motion and the rotation of the rotor shaft. 4.a device that provides and adjustable time period to perform a function.arrow_forward
- 14.a. Jogging a motor is accomplished byA. manually turning its shaft.B. reducing its armature current.C. momentarily energizing the starter.D. blocking the motor from rotating.14.b. How does change in resistance affect the speed of a DC motor?A. Increasing the armature resistance decreases the motor's speed.B. Reducing the field resistance increases the motor's speed.C. Increasing the field resistance decreases the motor's speed.D. Reducing the armature resistance decreases the motor's speed.arrow_forwardUsing the following control devices ,draw an electrical circuit that will manage the direction of rotation of the DC motor. With the pushbutton in its normal state, the motor should be rotating in one direction. Actuating the pushbutton should reverse the motor’s direction of rotation.arrow_forwardBelow is a diagram of a DC motor and the mechanical load connected to it. Which statement is wrong? A. The speed of the motor ea increases with increasing B. The torque of the motor increases with increasing ia C. eb increases and speed decreases D. if increasing. the torque of the motor increases E. Nonearrow_forward
- 22) What type of conversion is happening in a DC Motor. a. DC electrical energy to mechanical energy b. AC electrical energy to mechanical energy c. Mechanical to AC Electrical Energy d. Mechanical to DC Electrical Energyarrow_forwardQ4/ choose the correct answer The back emf in a dc motor is ___________________?. 1-opposes the applied voltage 2- aids the applied voltage 3- opposes the field current 4- aids the armature currentarrow_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
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