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DC Generators DC GENERATOR THEORY DC GENERATOR THEORY DC generators are widely used to produce a DC voltage.  The amount of voltage produced depends on a variety of factors. EO 1.5 LIST the three conditions necessary to induce a voltage into a conductor. EO 1.6 Using the left-hand rule of generators, DETERMINE the direction of the magnetic field, the motion of the conductor, or the direction of current induced into a conductor. EO 1.7 DESCRIBE   how   terminal   voltage   of   a   DC generator is adjusted. EO 1.8 STATE  the  basis  behind  each  of  the  four  DC generator ratings. EO 1.9 LIST  the  four  internal  losses  found  in  a  DC generator. Voltage Production Recall from Module 3, DC Circuits, that there are three conditions necessary to induce a voltage into a conductor. 1. A magnetic field 2. A conductor 3. Relative motion between the two A DC generator provides these three conditions to produce a DC voltage output. Theory of Operation A basic DC generator has four basic parts:  (1) a magnetic field; (2) a single conductor, or loop; (3) a commutator; and (4) brushes (Figure 3).   The magnetic field may be supplied by either a permanent magnet or an electromagnet.   For now, we will use a permanent magnet to describe a basic DC generator. Rev. 0 Page 5 ES-05


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