The types discussed in the following paragraphs are typical of the more predominant ones in use. 3.3: The phase voltage of the generator is just the sum of its internal generated voltage and its armature reaction voltages. 1. slip rings link the rotor’s field winding to an external dc source 2. dc generator exciter • a dc generator is built on the same shaft as the ac generator’s rotor • a commutator rectifies the current that is sent to the field winding • Low speed, large hydro-generators may have more than one hundred poles. Electrical Machine 1 (ENEL3MA) Uploaded by. Nov 21, 2020 - Chapter 3 - DC Machines (Part - 1) - Notes, Electrical Machines, Electrical Engineering | EduRev Notes is made by best teachers of Electrical Engineering (EE). University of KwaZulu-Natal. In a separately excited DC generator, the field winding is excited by an external independent source. Module 4 - Batteries View Notes - Lecture Notes on DC Machines.pdf from EE 3010 at Nanyang Technological University. 3 DC GENERATOR The direct current (DC) generator (Dynamo) is only used for special application or local power generation. 3.2d, compared to the field predicted by the cylindrical rotor theory. • For a DC MOTOR, the efficiency is the electrical output power divided by the mechanical input power, or • For a DC GENERATOR, the efficiency is the electrical output power divided by the mechanical input power, or • Note that the efficiency of a DC machine will vary with … EE3010 ElectricalDevicesand Machines LECTURENO6 Introduction To DC Machinery Fundamentals DC … Module 2 - Basic DC Theory This module describes the basic concepts of direct current (DC) electrical circuits and discusses the associated terminology. There are generally three most important characteristic of DC generator: Magnetic or Open Circuit Characteristic of Separately Excited DC Generator The curve which gives the relation between field current (I f) and the generated voltage (E 0) in Rotating Armature Generator In the rotating armature AC generator as illust rated in Figure 1, the stator provides a Course notes files. Lecture Note ... Part 1 Direct current generator By Suthipong Thanasansakorn 1/6/2010 Southeast Asia Fishery development center Training Department Thailand . University. The resulting stator magnetic field is shown in Fig. In fact, the same dc machine can be used interchangeably as a generator or as a motor. Volume 2 of 4 Module 3 - DC Circuits This module introduces the rules associated with the reactive components of inductance and capacitance and how they affect DC circuits. … This document is highly rated by Electrical Engineering (EE) students and has been viewed 12764 times. DC MACHINES AND TRANSFORMERS LECTURE NOTES Dr. P Sridhar Professor & Head Department of Electrical and Electronics Engineering P MABU HUSSAIN Assistant Professor Department of Electrical and Electronics Engineering INSTITUTE OF AERONAUTICAL ENGINEERING (Autonomous) Dundigal – 500043, Hyderabad DC-Generator 2 - Lecture notes 2. DC-Generator 2 - Lecture notes 2. CHAP # TOPICS; 1: Electromagnetic Forces (PDF) 2: Magnetic Circuit Basics (PDF) 3: Eddy Currents, Surface Impedances and Loss Mechanisms (PDF) 4: Elementary Synchronous Machine Models (PDF) 5: Winding Inductances (PDF) 6: DC (Commutator) and Permanent Magnet Machiness (PDF) 7: Permanent Magnet "Brushless DC" Motors (PDF) 8 Lecture Notes Elements of Electrical Machines 12 Figure 2.3 : Torque in DC Motor Figure 4 : Current Flow in DC Motor Constructionally, there is no basic difference between a dc generator and motor. 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