Skip to main content

AC MOTORS

There are many different types and sizes of electric motors. Electric motors can be divided into two types: Alternating Current (AC) motors and Direct Current (DC) motors. An AC electric motor requires an alternating current, while a DC motor requires direct current. AC motors are further subdivided into single phase and three phase motors. Single phase AC electrical supply is what is typically supplied in a home. Three phase electrical power is commonly only available in a factory setting. The most common single phase AC motor is known as a universal motor. This is because this motor can also run with DC current..continue..


An AC motor is an electric motor driven by an alternating current.
It commonly consists of two basic parts, an outside stationary stator having coils supplied with alternating current to produce a rotating magnetic field, and an inside rotor attached to the output shaft that is given a torque by the rotating field. Where speed stability is important, some AC motors (such as some Papst motors) have the stator on the inside and the rotor on the outside to optimize inertia and cooling..continue..

Siemens detailed discussion and illustration of the basics of an AC motor..continue..

DC or direct current motors work in particular situations whereby the speed of the motor needs to be externally controlled. On the other hand AC or alternating current electric motors are used in a completely different process drawing upon the kind of ac motor being used.DC motors generally characterize a continual and standard current flow. These were infact the first ever kind of motors to be used, the earliest form, whereas, the single phase AC motors are precisely termed as the general purpose motors which can be used in variant situations irrespective of the quality of the current flow.

Upon completion of this chapter you will be able to:
  • List three basic types of ac motors and describe the characteristics of each type.
  • Describe the characteristics of a series motor that enable it to be used as a universal motor.
  • Explain the relationships of the individual phases of multiphase voltages as they produce rotating magnetic fields in ac motors.
  • Describe the placement of stator windings in two-phase, ac motors using rotating fields.
  • List the similarities and differences between the stator windings of two-phase and three-phase ac motors.
  • State the primary application of synchronous motors, and explain the characteristics that make them suitable for that application.
  • Describe the features that make the ac induction motor the most widely used of electric motors.
  • Describe the difference between the rotating field of multiphase motors and the "apparent" rotating field of single-phase motors.
  • Explain the operation of split-phase windings in single-phase ac induction motors.
  • Describe the effects of shaded poles in single-phase, ac induction motors
  • .continue..
Labels:

Comments

Post a Comment

Popular posts from this blog

FRUITS AS BATTERY AND SOURCE OF ELECTRICITY

Electric Fruits Project   The purpose of this project was to find out which fruit would generate enough electricity to light a light bulb and to discover which fruit would light the bulb the longest. To conduct my experiments I used a Multimeter, copper and zinc wires & electrodes, alligator clips with leads, various light bulbs and five types of fruits. continue.. Why Do Citrus Fruits Produce Electricity?   In order to generate electricity, there must be a power source and a complete circuit. When using a citrus fruit to create electricity, these rules still apply. In a simple experiment using a citrus fruit, the components of the circuit include: a lemon or other fruit, wire, two different metal elements and a small light bulb. The lemon in this circuit serves as the battery and power source. continue.. Fruit Power Project   Purpose To demonstrate how an electrical current can be generated using citrus fruits (such as lemons or limes) that is strong enough to power a small
2 comments
continue

ELECTROCUTION: ELECTRIC ACCIDENT THAT CAN BE AVOIDIED

Electrocution   Electrocution is a type of electric shock that, as determined by a stopped heart, can end life. Electrocution is frequently used to refer to any electric shock received but is technically incorrect; the choice of definition varies from dictionary to dictionary. However, in the vernacular, the term electrocution is used to mean: death, murder or a sudden accident caused by an electric shock. deliberate execution by means of an electric shock, such as an electric chair; the word "electrocution" is a portmanteau for "electrical execution".. continue.. Electric Shock   Electric Shock of a (human) body with any source of electricity that causes a sufficient current through the skin, muscles or hair. Typically, the expression is used to denote an unwanted exposure to electricity, hence the effects are considered undesirable. The minimum current a human can feel depends on the current type (AC or DC) and frequency. A person can feel at least 1 mA (rm
3 comments
continue

POWER SYSTEMS LOSS.COM: LOSSES IN ELECTRICAL SYSTEM

What is powersystemsloss all about?    System's loss reduction is now one of the most growing trends in every electric distribution utility. Primarily triggered by economics and regulation concerns, Transmission and Distribution companies now sets more focus in reducing losses and become as an efficient utility as possible in delivering power. Information found in this site will be very useful not only to electrical practitioners but it is also our goal to help students better understand the actual world. Thank you and lets all enjoy learning! continue..   Back to basic    n case you don't know, the power we get from our household electrical outlet didn't just appear in the thin air. It may appear that it is coming out from our walls but we all know that looks can be deceiving. Before reaching our respective homes, electric current passes through miles and miles of conductors. W
Post a Comment
continue