Perhaps the leading case applying the doctrine of promissory estoppel to subcontractors' bids is a 1958 case decided by the California Supreme Court.3 In that case, a general contractor preparing to bid on a school project received a bid by telephone from a subcontractor for the paving portion of the job.
Basically, four different types of DC motors are used in industrial applications: series wound, shunt wound, compound wound, and permanent magnet. Several factors must be considered when selecting a DC motor for a specific application.
Why we don't consider the inductance of a dc machine though actually the current flowing in the armature of dc machine is alternating in natur... A DC machine is an energy converter which operates from a DC source and produces power or converts mechanical power into DC power. They function because of the principle of electromagnetic induction which states that, âWhenever a conductor crosses the lines of force of a varying magnetic field, a.