Web20 de dez. de 2013 · START NOW. Lecture 10. DC Generators: Steady State -I. The material covered in this lecture will be as follows: 1) The no load characteristics of a DC machine. 2) The steady state load characteristics of DC generators. At the end of this lecture you should be able to: ‣ Explain the open circuit characteristics of a DC machine. WebArmature reaction in DC machines and it's adverse effects. EMF and Torque equation EMF equation of a DC generator and torque equation of a DC motor. Characteristics of DC generators Internal (E/Ia), external (V/I L) and open circuit characteristics. Losses in a DC machine Copper losses, iron losses (core losses), mechanical losses, power flow ...

Electrical Machines I Viva Short Questions and Answers PDF

WebGenerally, following three characteristics of DC generators are taken into considerations: (i) Open Circuit Characteristic (O.C.C.), (ii) Internal or Total Characteristic and (iii) … WebFigure 12 shows the open-circuit voltage curve (OCC) and the short-circuit current curve (SCC) for a typical machine. The voltage curve slope begins to decrease as the field current increases due to saturation of the iron in the machine. Figure 12: Open-circuit and short-circuit characteristics of a synchronous machine at rated speed. diaper babies with socks

Characteristics of DC Generators – Explanation, Types & Diagram

WebMotoring Mode of DC Machine: In this mode, l a flows in opposition to induced emf E a as in Fig. 7.6 (b). E a is now known as the back emf to stress the fact that it opposes the … WebOpen circuit characteristics of DC Generator or OCC of DC Generator is 1st half of complete explanation. This video contains explanation of what is Open circ... WebThe basic test procedure is: Open circuit the generator terminals. Drive the machine at synchronous speed using an external mechanical system. Slowly increase the field current and measure the open circuit terminal … citibank hong kong branch address