Mention three speed control method In a d.c machine

BRIEFLY EXPLAIN THE PRINCIPLE OF OPERATION OF THE FOLLOWING SPEED-CONTROL METHODS OF A D.C MACHINE

(I) Fux control. (Ii) Rheostat control. (III) voltage control
1) Flux control: For shunt motor, flux control method is frequently used because it’s simple and inexpensive. In this method, a variable resistance (known as shunt field Rheostat) is placed in series with shunt field windings.For series motor, in this method the flux produced by the series motor is varied and hence the speed. The variation of flux can be achieved in the following ways.
(I) Field diverters. (Ii) Armature diverters (III) tapped field control (IV) paralleling field coils.
(2) voltage control method: In this method, the voltage source supplying the field current is different from that which supplies the armature. This method avoids the disadvantages of poor speed regulations and low efficiency as in armature control method. However, it’s quite expensive.
3) Rheostat control DC shunt motor: In this method, speed variation is accomplished by means of variable resistance in series with the shunt field. An increase in controlling resistance will reduce the field current with a reduction in flux and an increase in

Speed

7 thoughts on “Mention three speed control method In a d.c machine

  1. Noble says:

    Hi there! This article could not be written much better!
    Going through this post reminds me of my previous roommate!
    He constantly kept preaching about this. I will forward this information to him.
    Pretty sure he will have a great read. Thank you for sharing!

  2. Jefferson says:

    I’m really impressed with your writing skills as well as
    with the layout on your blog. Is this a paid
    theme or did you customize it yourself? Anyway keep up the excellent quality writing, it is rare to
    see a great blog like this one these days.

  3. Phoebe says:

    After I originally commented I seem to have clicked the -Notify me when new comments are added- checkbox and from
    now on every time a comment is added I recieve 4 emails with the same comment.
    There has to be a way you can remove me from that
    service? Many thanks!

  4. Tyree says:

    I’d like to thank you for the efforts you’ve put in penning
    this blog. I really hope to check out the same high-grade content by you later on as well.
    In truth, your creative writing abilities has motivated me to get my own blog
    now 😉

Leave a Reply

This site uses cookies to offer you a better browsing experience. By browsing this website, you agree to our use of cookies.