1 / 8

Motor Principle

Motor Principle. Current flowing through a loop in a magnetic field produces force in opposite directions on opposite sides of the loop Tends to rotate the coil about its axis. down. Up. Rotational Force (Torque).  = N I A B sin N – number of coils I – current A – area of coil

bien
Download Presentation

Motor Principle

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Motor Principle

  2. Current flowing through a loop in a magnetic field produces force in opposite directions on opposite sides of the loop • Tends to rotate the coil about its axis down Up

  3. Rotational Force (Torque)  = N I A B sin N – number of coils I – current A – area of coil B – magnetic field  - angle between coil and mag field

  4. Example • A circular coil of diameter 20cm contains 10 loops. The current in the coil is 3.0 A and the coil is in a 2.0T magnetic field. Determine the torque acting on the coil.

  5. Applications • Motor • Ammeter • Speaker

  6. Solenoids • Coil of wire • When current flows, creates a straight magnetic field • Called an electromagnet • Strength of magnetic field is • Proportional to current • Proportional to # of loops

  7. Strength of Electromagnet • Increased by adding a core material which is ferromagnetic - increases by a factor ( - magnetic permeability) B =  n I

  8. Example • What is the strength of a magnetic field produced by a 150 loop coil wrapped around an iron core ( = 2000) and carrying a current of 1.5 A?

More Related