Results 1 to 5 of 5

Thread: Advantages of AC MOTORS

  1. #1
    New Member
    Join Date
    Sep 2007
    HSC
    2008
    Gender
    Male
    Posts
    1
    Rep Power
    9

    Advantages of AC MOTORS

    what is the advantages and disadvantages of AC motors..

    thx

  2. #2
    Executive Member me121's Avatar
    Join Date
    Apr 2006
    HSC
    2007
    Gender
    Male
    Location
    -33.917188, 151.232890
    Posts
    1,416
    Rep Power
    10

    Re: Advantages of AC MOTORS

    AC Advantages

    * Voltage can be stepped up and down.
    * Can be transmitted at high voltage.
    * Less energy loss in transmission.
    * Simple slip ring commutator is used.

    AC Disadvantages

    * Back emf opposes supplied emf.
    * Emits EMR, so wires need insulation and shielding.
    * Frequency must be sent to consumer at 50Hz. This has to be maintained and monitored.

    Source: Biki, http://www.boredofstudies.org/wiki/i...e_to_their_use

  3. #3
    Junior Member twilight1412's Avatar
    Join Date
    Mar 2006
    HSC
    2007
    Gender
    Male
    Location
    St Marys
    Posts
    197
    Rep Power
    10

    Re: Advantages of AC MOTORS

    AC Advantages

    * Voltage can be stepped up and down.

    This is an advantage of using AC current over DC and not a reason why you should use a AC MOTOR over a DC one

    * Can be transmitted at high voltage.
    * Less energy loss in transmission.

    same with these

    reasons should look more like this
    *less moving parts = less wear

    AC Disadvantages

    * Back emf opposes supplied emf.

    DC also has this

    it is also more difficult for AC to be converted between a motor/generator
    Last edited by twilight1412; 7 Mar 2008 at 8:21 PM.
    --------------------------------------------------------
    B Engineering (Mechatronics)/B Science(Nanotechnology)
    UTS
    ---------------------------------------------------------
    distance makes the heart grow fonder
    but ah that cannot be
    new friends you meet
    new faces see
    and soon you'll forget me
    ----------------------------------------------------------

  4. #4
    Cadet
    Join Date
    Jan 2008
    HSC
    2008
    Gender
    Male
    Posts
    37
    Rep Power
    9

    Wink Re: Advantages of AC MOTORS

    Advantages of AC
    • AC can be transformed
    • AC generators have fewer moving parts and are thus easier and cheaper to maintain
    • AC produces less heat, friction and are lighter and more efficient than their DC conterparts
    Advantages of DC
    • DC does not need as much insulation as DC has no high frequency electromagnetic radiation.
    • DC generators also produce a back emf, but the transmission of DC has no energy loss due to induction in adjacent lines and metal structures
    Disadvantages of AC
    • AC will produce eddy currents due to the production of a back emf
    • AC needs thicker insulation to minimise interference with other electronic equipment
    Disadvantages of DC
    • DC cannot be transformed
    • DC generators are not as reliable due to sparking and wear across the split ring commutators.

  5. #5
    New Member
    Join Date
    Jan 2019
    HSC
    N/A
    Gender
    Undisclosed
    Posts
    1
    Rep Power
    0

    Re: Advantages of AC MOTORS

    - Ac motors are brushless and develop a higher torque.
    - The speed and the power developed can be varied with the aid of a controller.
    - They can operate at higher voltages hence reducing the size of wire.

    I think ac motors are better than dc.
    Thanks for your information.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •