Critical field resistance
This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages)(Learn how and when to remove this template message)
Critical field resistance is a term that is associated with a shunt DC generator. In a DC Shunt Generator, the voltage induced across the Armature Va is directly proportional to the Flux acting across it, The Flux in a DC Generator is directly proportional to the field current If. By Ohm's Law V = IR . The critical field resistance is defined as the maximum field circuit resistance (for a given speed) with which the shunt generator would excite. The shunt generator will build up voltage only if field circuit resistance is less than critical field resistance.
It is a Tangent to the Open Circuit Characteristics of the Generator(at a given speed).
- Electrical Technology - II by B.L.Thereja