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D.P. Kothari and I.J. Nagrath, "Electric Machines," Approved by the UGC and published by Tata McGraw Hill, New Delhi with NBT subsidy, First Edition, 1985, (16 Reprints): Second Edition, 1997, (16 Reprints); Third Edition, 2004 (13th reprint 2009).
In electrical engineering, dot marking convention, or alphanumeric marking convention, or both, can be used to denote the same relative instantaneous polarity of two mutually inductive components such as between transformer windings. These markings may be found on transformer cases beside terminals, winding leads, nameplates, schematic and ...
1909 500 kW Westinghouse rotary converter. A rotary converter is a type of electrical machine which acts as a mechanical rectifier, inverter or frequency converter.. Rotary converters were used to convert alternating current (AC) to direct current (DC), or DC to AC power, before the advent of chemical or solid state power rectification and inverting.
D. S. Kothari "went to Cavendish Laboratory on a U.P. Government fellowship in 1930 and worked with Ernest Rutherford, P. Kapitza, and R. H. Fowler". [5] He was awarded a PhD from Cambridge University in May 1933 with a thesis entitled "The quantum statistics of dense matter" [6] and he published in the Proceeding of the Royal Society, London. [7]
Transformation of three phase electrical quantities to two phase quantities is a usual practice to simplify analysis of three phase electrical circuits. Polyphase a.c machines can be represented by an equivalent two phase model provided the rotating polyphases winding in rotor and the stationary polyphase windings in stator can be expressed in a fictitious two axes coils.
In electrical power systems a slack bus (or swing bus), defined as a Vδ bus, is used to balance the active power | | and reactive power | | in a system while performing load flow studies. The slack bus is used to provide for system losses by emitting or absorbing active and/or reactive power to and from the system.
Superconducting electric machines are electromechanical systems that rely on the use of one or more superconducting elements. Since superconductors have no DC resistance, they typically have greater efficiency. The most important parameter that is of utmost interest in superconducting machine is the generation of a very high magnetic field that ...
The introduction of DC motors and an electrical grid system to run machinery starting in the 1870s started a new second Industrial Revolution. DC motors can operate directly from rechargeable batteries, providing the motive power for the first electric vehicles and today's hybrid cars and electric cars as well as driving a host of cordless ...