ELECTROMECHANICAL ENERGY

Dynamical Equations of Electromechanical Systems

Dynamical Equations of Electromechanical Systems: Dynamical Equations of Electromechanical Systems – Figure 4.19 shows an electromagnetic relay whose armature is loaded with spring K, damper B,. mass Mand a force generator F. Figure 4.20 shows the abstracted diagram of a general electromechanical system. It is easily noticed that the electromechanical device has one electrical port […]

Electric Field Energy

Electric Field Energy: Electric Field Energy – Electromechanical energy conversion via the electric field is analogous to the magnetic field case studied earlier. Charge in the electric field is analogous to flux linkages and voltage to current in the magnetic field case. Figure 4.18 shows a parallel plate condenser with a fixed and a movable […]

Forces Torques in Systems with Permanent Magnets

Forces Torques in Systems with Permanent Magnets Forces Torques in Systems with Permanent Magnets – Method of finding forces in systems 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 dc magnetizing curve of the permanent magnet is drawn in Fig. […]

Multiply Excited Magnetic Field Systems

Multiply Excited Magnetic Field Systems Multiply Excited Magnetic Field Systems – 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 requirement of producing an electrical signal proportional to forces or velocities or producing force proportional to electrical signal (current or […]

Flow of Energy in Electromechanical Devices

Flow of Energy in Electromechanical Devices Flow of Energy in Electromechanical Devices – 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 on positive x direction under the influence ofFf, electrical energy is converted to mechanical […]

Field Energy and Mechanical Force

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 the direction indicated which drives the mechanical system (which may be composed of passive and active mechanical elements). The mechanical […]

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