Understanding Motor Controls - 4th Edition - by Stephen L. Herman - ISBN 9781337798686
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Understanding Motor Controls
4th Edition
Stephen L. Herman
Publisher: Delmar Cengage Learning
ISBN: 9781337798686

Solutions for Understanding Motor Controls

Browse All Chapters of This Textbook

Chapter 11 - Timing RelaysChapter 12 - Sequence ControlChapter 13 - Pressure Switches And SensorsChapter 14 - Float Switches And Liquid Level SensorsChapter 15 - Flow SwitchesChapter 16 - Limit SwitchesChapter 17 - Temperature Sensing DevicesChapter 18 - Hall Effect SensorsChapter 19 - Proximity DetectorsChapter 20 - PhotodetectorsChapter 21 - Reading Large Schematic DiagramsChapter 22 - Installing Control SystemsChapter 23 - Across-the-line StartingChapter 24 - Resistor And Reactor Starting For Ac MotorsChapter 25 - Autotransformer StartingChapter 26 - Wye-delta StartingChapter 27 - Part Winding StartersChapter 28 - Direct Current MotorsChapter 29 - Single-phase MotorsChapter 30 - BrakingChapter 31 - Wound Rotor MotorsChapter 32 - Synchronous MotorsChapter 33 - Consequent Pole MotorsChapter 34 - Variable Voltage And Magnetic ClutchesChapter 35 - Solid-state Dc Motor ControlsChapter 36 - Variable Frequency ControlChapter 37 - Motor InstallationChapter 38 - Programmable Logic ControllersChapter 39 - Programming A Programmable Logic ControllerChapter 40 - Analog Sensing For Programmable Logic ControllerChapter 41 - Developing Control CircuitsChapter 42 - TroubleshootingChapter 43 - Direct Drives And Pulley DrivesChapter 44 - SemiconductorsChapter 45 - The Pn JunctionChapter 46 - The Zener DiodeChapter 47 - Light-emitting Diodes And PhotodiodesChapter 48 - The TransistorChapter 49 - The Unijunction TransistorChapter 50 - The ScrChapter 51 - The DiacChapter 52 - The TriacChapter 53 - The 555 TimerChapter 54 - The Operational Amplifier

Sample Solutions for this Textbook

We offer sample solutions for Understanding Motor Controls homework problems. See examples below:

Jogging: Jogging is to start a motor with short nudges of power at full voltage. Jogging should not...Timers are relays that operate after a specified time delay to fend off the malfunction of the...The purpose of sequence control is to maintain the predetermined order at which the motors are...Pressure switches are the switches that operate with respect to pressure variation in a system. In...Float switches are the switches that control the operation of a pump with respect to the level of...Flow switches are the switches that control the operation of an equipment with respect to the flow...Limit switches are the switches that control the operation of an equipment with respect to the...In general, all the metals expand on heating and contract on cooling but the rate of expansion and...The Hall effect was discovered by Edward H. Hall and is a principle widely used in today’s...Proximity sensors or detectors are used to sense an object's presence without touching it directly....Photodetectors: Photodetectors are sensors widely used in today’s industries to sense the presence...Refer the text book Figure 21-1. Refer the table given in Figure 21 – 1 for the HOA SW 122 switch....The point-to-point connection method is a method used for the installation of components in a...The simplest method of starting a motor is the across the line starting and is accomplished by...The two electrical components connected in series with the motor to limit the starting current are:...The autotransformer is used to reduce the amount of inrush current by reducing the voltage applied...Wye-delta starting is used to reduce the inrush current and the starting torque. The two...If a dual voltage 240/480V motor is used for a part winding starting, then the low voltage setting...A direct current motor is an electrical device that produces mechanical work for the electrical...Split phase motor works by splitting a single phase into two phases to mimic a two-phase power...The motors are generally slowed to stop by disconnecting thee power supplied. But, there are...One of the three major types of the three-phase motor is the wound rotor motor. The wound rotor...The synchronous motors can produce a leading power factor and can operate at the synchronous speed....Synchronous speed: The speed at which the magnetic field rotates in a motor is called the...Synchronous speed: The speed at which the magnetic field rotates in a motor is called the...The alternating current (AC) voltage is converted to direct current (DC) voltage in DC motors using...Given information: Number of poles per phase, P=6. Frequency of the supply, f=20 Hz. Calculation:...Given information: Horsepower is 20 HP. Armature voltage rating is 500 V Solution: Refer Table...The programmable logic controllers were first used in the automotive industry. The automotive...The programmable logic controller can only recognise whether a contact is open or closed. It doesn’t...The differences between the digital and analog inputs are as follows: Digital input.Analog...Refer text book Figure 41-6. The pressure switch shown in the circuit has its movable contact above...An industrial electrician's main job is to troubleshoot or restore a control circuit when it fails....The directly coupled induction motors are rarely used in the applications where the required speed...Conductors are formed from materials which have large and heavy atoms. Most of materials which...To control the flow of electric current in a circuit, a basic semiconductor is used which is known...Consider a diode, when the positive voltage is connected to anode and negative voltage to cathode,...The LED is a special type of diode that can produce light when a certain potential is applied over...Transistors are classified on the basis of the majority charge carriers present in the parts of the...UJT that stands for Unijunction transistor is a special type of transistor. Unlike BJT- bipolar...SCR stands for Silicon-controlled Rectifier, which is a four layered semiconductor material. The...Diac has a set voltage depending on the material used. When voltage of that particular value is...A triac is a PNPN junction which is connected in parallel to an NPNP junction. Triac operates in the...Identifying the left hand side of the IC is done by looking for a notch on the top of the package....The polarity of the input for Inverting pin changes at the output. For suppose if negative input is...

More Editions of This Book

Corresponding editions of this textbook are also available below:

Student Cd For Herman’s Understanding Motor Controls
1st Edition
ISBN: 9781111537074
Understanding Motor Controls
3rd Edition
ISBN: 9781305498129