Forces in system with Permanent Magnets: Method of finding Forces in system with Permanent Magnets is best illustrated by an example. Figure 4.17(b) shows a moving armature relay excited by a permanent magnet (PM). The…
Multiply Excited Magnetic Field System: Multiply Excited Magnetic Field System - Singly-excited devices discussed earlier, are generally employed for motion through a limited distance or rotation through a prescribed angle. Electro-mechanical transducers have the special…
Principle of Electromechanical Energy Conversion: Principle of Electromechanical Energy Conversion is a reversible process and Eqs (4.26) to (4.29) govern the production of mechanical force. In Fig. 4.4 if the armature is allowed to move…
Field Energy and Mechanical Force: Field Energy and Mechanical Force - Consider once again the attracted armature relay excited by an electric source as in Fig. 4.4. The field produces a mechanical force Ff in…
Energy in Magnetic System: Energy in Magnetic System - The chief advantage of electric energy over other forms of energy is the relative ease and high efficiency with which it can be transmitted over long…
Audio Frequency Transformer: Audio Frequency Transformer is used at the output stage of Audio Frequency electronic amplifier for matching the load to the output impedance of the power amplifier stage. Here the load is fixed…
Current transformer and Potential transformer: These Current transformer and Potential transformer are designed to meet the specific need of measurement and instrumentation systems, which accept voltages in the range of 0-120 V and currents upto…
Tap Changing Transformer | Off Load Tap Changer |On Load Tap Changing: Tap Changing Transformer -Voltage variation in power systems is a normal phenomenon owing to the rapid growth of industries and distribution network. System…
Phase Conversion in Transformer: Three Phase to Two Phase Conversion Transformer (Scott-T transformer or Scott Connection): Phase conversion from three to two phase is needed in special cases, such as in supplying 2-phase electric arc…
Three Winding Transformer: Three Winding Transformer may be built with a third winding, called the tertiary, in addition to the primary and secondary. Various purposes which dictate the use of a tertiary winding are enumerated…
