DC Motor Types

SKU: C-614Duration: 16 Minutes

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Language:  English

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Course Details

Specs

Training Time: 16 minutes

Compatibility: Desktop, Tablet, Phone

Based on: Industry Standards and Best Practices

Languages: English

DC motors are electrical motors powered by direct current, or DC. DC is a type of electrical current that flows in one direction only, from sources such as batteries or solar panels. DC may also be produced through the use of a rectifier, which is an electrical device which converts alternating current (AC) to DC. This module will describe the design, operation, and applications of series, shunt, compound, permanent magnet, and separately excited motors.

Learning Objectives

At the end of this module, you will be able to:

  • Describe the design of series, shunt, compound, permanent magnet, and separately excited motor
  • Describe the operation of series, shunt, compound, permanent magnet, and separately excited motors
  • Describe the applications of series, shunt, compound, permanent magnet, and separately excited motors
  • Describe how motor direction reversal is accomplished
  • Identify some advantages and disadvantages of DC motors

Key Questions

The following key questions are answered in this module:

What are the main types of DC motors used?
The five main types of DC motors are series, shunt, compound, permanent magnet DC (PMDC), and separately excited.

What are DC motors commonly used for?
DC motors are commonly used in everything from toys and computer drives to automobiles and manufacturing equipment.

What are some of the advantages of a DC motor?
Advantages of DC motors include compact design and battery operation for portability, as well as well as a high degree of torque and speed control.

What are some of the disadvantages of a DC motor?
DC motors have some inherent disadvantages that include: Relatively high initial cost and short operational lifespan for heavy-use industrial applications; High maintenance due to wear of brushes and commutators; Potential for sparks between contact surfaces, requiring operation outside of hazardous of explosive environments; and Possible radio frequency (RF) interference with nearby devices due to strong magnetic fields produced by the stator.

Sample Video Transcript

Below is a transcript of the video sample provided for this module:

While there are important advantages of DC motors, including compact design and battery operation for portability, as well as a high degree of torque and speed control, DC motors have some inherent disadvantages that include relatively high initial cost and short operational lifespan for heavy-use industrial applications. High maintenance due to wear of brushes and commutators. Potential for sparks between contact surfaces, requiring operation outside of hazardous or explosive environments. And possible radio frequency or RF interference with nearby devices due to strong magnetic fields produced by the stator.

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