Motor Controls

Consider the typical manufacturing shop. A wide range of machines and tools are used that rely on motion. When industry needs motion to turn or drive devices, it most often uses electric motors. Electric motors are one of the prime movers for industry. If motors are not installed, used, and maintained correctly, essential work does not get done.

These classes explain the fundamental concepts of designing, providing, and maintaining electrical control for motors. The class content first addresses the main elements of motors and the principles that make motors work, with several classes devoted to reading the symbols and line diagrams used to represent electrical circuits. Advanced-level classes focus on simple to complex control devices--the physical switches, contactors, and relays that open and close electrical circuits, allowing motors to perform useful work.


Class Functional Area Format Difficulty Version Department
123
Classes 1 to 10 of 23
Relays, Contactors, and Motor Starters 201

Relays, Contactors, and Motor Starters provides an overview of the primary components involved in electric motor control. Relays are electrical switches that control a circuit. When activated by current, a relay opens and closes a circuit to turn a larger ...

Related 1.0 Class:
Contactors and Motor Starters 250
Maintenance Online Intermediate 2.0 Motor Controls
Control Devices 211

Control Devices 211 covers the fundamental components of motor controls, devices that control the flow of current in circuits. Dangers of electric shock and other safety risks are significantly heightened when working with control devices. Control devices can be manual, ...

Related 1.0 Class:
Control Devices 260
Maintenance Online Intermediate 2.0 Motor Controls
Distribution Systems 221

Distribution Systems 221 describes power distribution systems and their components. Distribution systems are integral parts of motor control systems because they consist of all generators, transformers, wires, and other devices used to transport power from the source to end use. ...

Related 1.0 Class:
Distribution Systems 320
Maintenance Online Intermediate 2.0 Motor Controls
Limit Switches and Proximity Sensors 231

Limit Switches and Proximity Sensors introduces users to commonly used manufacturing sensors that detect the presence or absence of an object. Limit switches are mechanical sensors that require physical contact to be actuated. There are many variations of limit switches, ...

Related 1.0 Class:
Limit Switches and Proximity Sensors 360
Maintenance Online Intermediate 2.0 Motor Controls
Introduction to Electric Motors 301

Introduction to Electric Motors provides a comprehensive overview of electric motors and the principles on which they operate. Electric motors use magnetic induction to turn electricity into mechanical motion. This motion is rated by mechanical power variables, such as speed, ...

Related 1.0 Class:
Intro to Electric Motors 200
Maintenance Online Advanced 2.0 Motor Controls
Symbols and Diagrams for Motors 311

Symbols and Diagrams for Motors introduces different diagrams used to represent motor circuits and symbols that circuit diagrams commonly contain. Pictorial diagrams are the simplest and use illustrated pictures to represent circuit components. Schematic diagrams and line diagrams use symbols ...

Related 1.0 Class:
Symbols and Diagrams for Motors 210
Maintenance Online Advanced 2.0 Motor Controls
Logic and Line Diagrams 312

Logic and Line Diagrams provides a comprehensive look at circuit logic and diagrams. The way a circuit functions depends on its circuit logic, which can be AND, OR, NAND, or NOR. The logic used in a circuit determines the layout ...

Related 1.0 Class:
Logic and Line Diagrams 220
Maintenance Online Advanced 2.0 Motor Controls
DC Motor Applications 321

DC Motor Applications provides a comprehensive overview of DC motors and their uses in industry. DC motors generally consist of an armature, a commutator, brushes, and field windings. DC motors may be series, shunt, or compound, depending on their field ...

Related 1.0 Class:
DC Motor Applications 230
Maintenance Online Advanced 2.0 Motor Controls
AC Motor Applications 322

AC Motor Applications provides a comprehensive overview of different types of AC motors and how they operate. The main components of AC motors are stators and rotors. The two basic types of AC motors are induction and synchronous motors. AC ...

Related 1.0 Class:
AC Motor Applications 240
Maintenance Online Advanced 2.0 Motor Controls
Specs for Servomotors 330

This class covers the basic types of servomotors and the components that can be used in a servo system.

Maintenance Online Advanced 1.0 Motor Controls
FormatFunctional AreaDepartment IDDepartmentClass IDClass NameDescriptionDifficultyVersionLanguageRelated Classes
OnlineMaintenance460Motor Controls920100 Relays, Contactors, and Motor Starters 201 Relays, Contactors, and Motor Starters provides an overview of the primary components involved in electric motor control. Relays are electrical switches that control a circuit. When activated by current, a relay opens and closes a circuit to turn a larger current on or off. Contactors control current by conducting it through metal contacts that make or break electrical circuits. When combined with an overload relay, a contactor becomes a motor starter.Working with relays, contactors, and motor starters requires technicians to understand how to properly care for such devices and how to operate them effectively. After taking this class, users will be able to describe the design and function of common relays, contactors, and motor starters, as well as the applications for each device.Intermediate2.0English(460250) Contactors and Motor Starters 250
OnlineMaintenance460Motor Controls920110 Control Devices 211 Control Devices 211 covers the fundamental components of motor controls, devices that control the flow of current in circuits. Dangers of electric shock and other safety risks are significantly heightened when working with control devices. Control devices can be manual, mechanical, or automatic and are used in a variety of ways. Control devices include different types of buttons and switches, all of which serve differing purposes. It is necessary for those working with motor controls to understand control devices and apply their knowledge to appropriately select and operate these items according to application. After taking this course, students will be able to describe the design and function of commonly used mechanical control devices, along with applications appropriate for each device.Intermediate2.0English(460260) Control Devices 260
OnlineMaintenance460Motor Controls920120 Distribution Systems 221 Distribution Systems 221 describes power distribution systems and their components. Distribution systems are integral parts of motor control systems because they consist of all generators, transformers, wires, and other devices used to transport power from the source to end use. Generating stations house generators that are linked together in parallel circuits to create power. Transformers step up and step down voltage. Substations house transformers and provide a safe point to cut the power.Understanding the ways in which electricity is distributed and how to work safely with distribution systems is an essential part of working within motor controls. After taking this course, users will be able to describe how power enters a facility and is distributed to electrical equipment, as well as best practices for safely working with electrical power distribution systems.Intermediate2.0English(460320) Distribution Systems 320
OnlineMaintenance460Motor Controls920130 Limit Switches and Proximity Sensors 231 Limit Switches and Proximity Sensors introduces users to commonly used manufacturing sensors that detect the presence or absence of an object. Limit switches are mechanical sensors that require physical contact to be actuated. There are many variations of limit switches, including different operating mechanisms and environmental classifications. Proximity sensors, including inductive, capacitive, and Hall Effect sensors, do not require physical contact because they use an electronic or magnetic sensing field. These devices have different advantages and disadvantages and are used for various applications.Limit switches and proximity sensors are widely used for automated systems in all types of industries. They are used to control speed and motion as well as detect, count, position, and divert parts. After taking this class, users will understand the function, application, and installation considerations for commonly used limit switches and proximity sensors.Intermediate2.0English(460360) Limit Switches and Proximity Sensors 360
OnlineMaintenance460Motor Controls920200 Introduction to Electric Motors 301 Introduction to Electric Motors provides a comprehensive overview of electric motors and the principles on which they operate. Electric motors use magnetic induction to turn electricity into mechanical motion. This motion is rated by mechanical power variables, such as speed, torque, and horsepower. Electric motors run on either direct or alternating current. Direct current motors include series, shunt, and compound motors. Common AC motors are squirrel cage, wound rotor, and synchronous. Different types of motors are used for different applications.All maintenance personnel must have a good understanding of electric motors because they are so commonly used. Before users can understand advanced motor control concepts, they must first develop a foundational knowledge of electric motors and how they function. This class introduces the topics that users will build on as they continue to study motor controls.Advanced2.0English(460200) Intro to Electric Motors 200
OnlineMaintenance460Motor Controls920210 Symbols and Diagrams for Motors 311 Symbols and Diagrams for Motors introduces different diagrams used to represent motor circuits and symbols that circuit diagrams commonly contain. Pictorial diagrams are the simplest and use illustrated pictures to represent circuit components. Schematic diagrams and line diagrams use symbols to represent components. Wiring diagrams also use symbols, but they are more detailed than the other types of diagrams. Most motor control devices are represented on a schematic diagram.Being able to interpret motor diagrams is extremely important when working with motor controls because they show how circuits are constructed and how components are connected. Users will also rely on their knowledge of diagrams and symbols when learning about more advanced motor topics and applications.Advanced2.0English(460210) Symbols and Diagrams for Motors 210
OnlineMaintenance460Motor Controls920220 Logic and Line Diagrams 312 Logic and Line Diagrams provides a comprehensive look at circuit logic and diagrams. The way a circuit functions depends on its circuit logic, which can be AND, OR, NAND, or NOR. The logic used in a circuit determines the layout of its corresponding line diagram. In general, line diagrams lay out the relationship between components on parallel lines. Line diagrams also include numbers to identify the location of components, the wires in the circuit, and the connections between components.This class will familiarize users with the rules and conventions of line diagrams, as well as the different types of circuit logic. This knowledge will allow users to read line diagrams, which is essential when working with motors and especially motor controls.Advanced2.0English(460220) Logic and Line Diagrams 220
OnlineMaintenance460Motor Controls920230 DC Motor Applications 321 DC Motor Applications provides a comprehensive overview of DC motors and their uses in industry. DC motors generally consist of an armature, a commutator, brushes, and field windings. DC motors may be series, shunt, or compound, depending on their field winding connections. Some DC motors use permanent magnets instead of field windings. In general, DC motors offer high torque and easy speed control, but they require more maintenance than AC motors.DC motors are used to provide control for many applications in industry, and most older manufacturing equipment uses DC motors. Since older equipment is more likely to need maintenance than newer equipment, personnel working with motor controls are more likely to need to service DC motors than AC motors. This class provides users with a good understanding of how DC motors work so that they can effectively operate and maintain these motors.Advanced2.0English(460230) DC Motor Applications 230
OnlineMaintenance460Motor Controls920250 AC Motor Applications 322 AC Motor Applications provides a comprehensive overview of different types of AC motors and how they operate. The main components of AC motors are stators and rotors. The two basic types of AC motors are induction and synchronous motors. AC motors can operate on single-phase or three-phase power. In general, AC motors require little maintenance. Depending on its type, a motor may need to be repaired or replaced when problems occur.AC motors are the most commonly used industrial motors, and many applications that previously used DC motors are replacing them with AC motors when possible. Working with the applications that use AC motors demands an understanding of how AC motors function. After taking this class, users will have a foundational knowledge of the components, types, and uses of AC motors.Advanced2.0English(460240) AC Motor Applications 240
OnlineMaintenance460Motor Controls460330 Specs for Servomotors 330 This class covers the basic types of servomotors and the components that can be used in a servo system.Advanced1.0English
OnlineMaintenance460Motor Controls920240 Solenoids 331 Solenoids introduces different types of solenoids and their uses. Solenoids use magnetic induction to produce linear motion. Common solenoid types are direct action, plunger, bell-crank, and clapper. Solenoids are rated by their voltage and current characteristics, which helps determine the appropriate solenoid for a given application. Solenoid failure may be caused by selecting the wrong solenoid, or other common causes such as incorrect voltage or frequency.Understanding how solenoids work is necessary for working with the many applications that utilize them, including combustion engines and industrial fluid control systems. After taking this class, users will have an understanding of solenoids and should be able to identify important factors in solenoid selection and common causes of solenoid failure. Knowing how to choose the correct solenoid and avoid solenoid failure decreases the chances of solenoids burning out or needing to be replaced for other reasons.Advanced2.0English(460235) Solenoids 235
OnlineMaintenance460Motor Controls460340 Timers and Counters 340 This class describes the functions and applications of various mechanical, electromechanical, and electronic timers and counters. Includes an Interactive Lab.Advanced1.0English
OnlineMaintenance460Motor Controls920260 Reversing Motor Circuits 341 Reversing Motor Circuits provides a comprehensive overview of the various means used to reverse electric motors. Motor control circuits use various control devices to change the direction in which a motor rotates. Reversing circuits typically use reversing starters, but they may also use drum switches, limit switches, and programmable logic controllers. To reverse a DC motor, the control device changes the direction of current flow in the motor’s armature. To reverse an AC motor, the control device interchanges two of the motor’s power lines.Many applications require motors to run in reverse, either to change the direction of operation or to brake and stop the motor. After taking this class, users will understand the basic principles behind reversing circuits for motors and be familiar with the various control devices they use. This will prepare users for designing, working with, and selecting control devices for various types of motor reversing circuits.Advanced2.0English(460310) Reversing Motor Circuits 310
OnlineMaintenance460Motor Controls920261 Motor Drive Systems and Maintenance 347 Motor Drive Systems and Maintenance describes the major components found in motor drive systems and best practices for system maintenance. A motor drive system typically consists of a variable frequency drive and a three-phase AC motor used to power a driven unit. The motor connects to the driven unit through a drive train. Because there are many mechanical and electrical components, motor drive systems are prone to various faults that interrupt operation and lead to downtime. Following a proactive maintenance approach can be a very effective method of preventing and dealing with system faults.Motor drive systems are used for many industrial applications. When operating motor drive systems, understanding how they work and how they can potentially fail is essential. In addition, understanding motor drive maintenance prepares users to operate machinery effectively, reducing downtime and manufacturing costs.Advanced2.0English
OnlineMaintenance460Motor Controls920262 Electrical Maintenance for Motor Drive Systems 348 Electrical Maintenance for Motor Drive Systems provides a comprehensive overview of the common power quality issues that occur in motor drive systems and the methods used to inspect and resolve these issues. Electrical maintenance involves inspecting input power, DC bus output, leakage current, and insulation resistance as well as checking for overloading, single phasing, electrical unbalance, transients, harmonics, and thermal abnormalities.Many industrial applications rely on motor drive systems to power output devices. Motor drive systems consist of complex electrical components and require sufficient power quality to function correctly. Power issues in any system component can cause the entire system to malfunction and fail, leading to lost production time and increased costs. This class prepares users to effectively operate and maintain motor drive systems to minimize downtime and economic losses.Advanced2.0English
OnlineMaintenance460Motor Controls920263 Mechanical Maintenance for Motor Drive Systems 349 Mechanical Maintenance for Motor Drive Systems provides an overview of the most common mechanical faults found in motor drive systems and describes typical inspection methods for mechanical maintenance. Vibration is a major issue that can have very damaging effects. Shaft misalignment, shaft imbalance, looseness, and bearing issues are the four most common causes of vibration. Vibration inspection helps identify and correct the causes of vibration. Thermal inspection, ultrasound analysis, and oil analysis are also used during mechanical maintenance.Motor drive systems are widely used to power industrial machinery. For these systems to operate safely and efficiently, their mechanical components must be in good working order. This class provides information that helps users understand major mechanical faults and how to identify and fix them. This information helps reduce unplanned downtime and expenses.Advanced2.0English
OnlineMaintenance460Motor Controls460350 Electronic Semiconductor Devices 350 In this class covers the functions and characteristics of many different electronic semiconductor devices.Advanced1.0English
OnlineMaintenance460Motor Controls460355 Photonic Semiconductor Devices 355 This class covers the characteristics and functions of photonic semiconductor devices.Advanced1.0English
OnlineMaintenance460Motor Controls460365 Photoelectric and Ultrasonic Devices 365 This class covers the properties and functions of photoelectric and ultrasonic sensors. Includes an Interactive Lab.Advanced1.0English
OnlineMaintenance460Motor Controls460370 Reduced Voltage Starting 370 This class describes the various methods of reduced voltage starting and explains when each type of starter is used.Advanced1.0English
OnlineMaintenance460Motor Controls460375 Solid-State Relays and Starters 375 This class covers the characteristics and functions of solid state relays and motor starters. Includes an Interactive Lab.Advanced1.0English
OnlineMaintenance460Motor Controls460380 Deceleration Methods 380 This class describes the various methods used to cause motor deceleration. It explains the situations where braking is needed and shows how braking is accomplished.Advanced1.0English
OnlineMaintenance460Motor Controls460385 Acceleration Methods 385 This class will describe the factors involved with motor acceleration and how they relate to each other. It will also explain how speed and acceleration are controlled in various types of electric motors.Advanced1.0English