Different types of losses in transformer: The transformer has no moving parts so that its efficiency is much higher than that of rotating machines. Different types of losses in transformer are enumerated below: Core Loss…
Difference Between Single Phase and Three Phase Induction Motor: Difference Between Single Phase and Three Phase Induction Motor - In a 3-phase induction motor the maximum torque is independent of the rotor resistance, while the…
Development of a High Efficiency Induction Motor: With ever-increasing energy cost the life-time operating cost of an induction motor can be traded against a high efficiency and high capital cost induction motors. With rising demand…
Determination of the Synchronous Reactance | Open Circuit and Short Circuit test of Synchronous Machine: Determination of the Synchronous Reactance - With the assumption of a linear magnetic circuit, the circuit model (per phase) of…
Define Permanent Magnet in Magnetic Circuits: Define of Permanent Magnet is an important excitation source (life long) commonly employed for imparting energy to magnetic circuits used in rotating machines and other types of electromechanical devices.…
Deep Bar Rotor Induction Motor: In this type of Deep Bar Rotor Induction Motor construction, bars of narrow width are laid down in deep semi-enclosed  slots as shown in Fig. 9.52. The magnetic leakage flux…
DC Motor Losses and Efficiency: The Losses and Efficiency of a transformer have been studied in earlier lesson. As in the case of transformers, it is more accurate to determine the DC Motor Losses and…
DC Motor Control through Converters: DC motor control is conveniently and efficiently achieved by phase-controlled converters wherein the ac input voltage is converted to a controlled dc output. The commutation process, the transfer of current from…
DC Machine Applications: Whenever the application of any machine is considered, its operating characteristics along with its economic and technical viability as compared to its competitors are the essential criteria. For a DC Machine Applications,…
Darlington Transistor Working: Darlington Transistors Working - A Darlington-connected transistor pair is shown in Fig. 11.6. The current gain of the power transistor can be considerably improved if the base drive current is obtained from…
