DC Machines Construction of DC Machine 10 Jun 202110 Jun 2021 Whether a machine is d.c. generator or a motor the construction basically remains the same as shown in the figure. DC machine consists of the following parts : Yoke :…
Transformer Ideal Transformer on No load 9 Jun 20219 Jun 2021 Consider an ideal transformer on no load as shown in the figure. The supply voltage is V1 and as it is an no load the secondary current  I2 = 0. The primary…
DC Machines… Characteristics of DC motors through Equations 6 Jun 20216 Jun 2021 Three characteristic curves are there for DC Motors given below (i) Torque vs. armature current, (ii) Speed vs. armature current (iii) Speed vs. torque Before going to discuss these characteristics,…
Electrical Machines… Necessity of Starter | Induction motor 26 May 2021 The three phase induction motors are self-starting due to rotating magnetic field. But the motors show tendency to draw very high current at the time of starting. Such a current…
DC Machines… Power, voltage and current equations for a DC motor 26 May 20216 Jun 2021 Voltage equation for a DC Motor In case of a generator, generated emf has to supply armature resistance drop and remaining part is available across the load as a terminal…