Singly excited electromechanical system - Electrical Machines

Singly excited electromechanical system

Singly excited electromechanical system

Excitation is the process by which energy (electrical or mechanical) is added to a system.The differential electrical input given to the system in small time dt is equal to

No electrical energy is absorbed by an electromagnetic system if its 'si' value is maintained constant. Since the above system cannot produce any mechanical output, the entire electrical input is stored in magnetic field as field energy.

• There is no physical significance for co - energy. It is useful only for mathematical analysis.
• Saturation is the property of a magnetic material by which its permeability decreases as the flux crosses a specified value.

 

• The effect of airgap on electromagnetic system is 1. To linearize its magnetic characteristics i.e, no saturation. 2. It reduces the flux value for a given excitation current.