DC Machine Applications

Maximum torque in dc series motor is limited by

Most commercial compound dc generator are normally supplied by manufacturers as over compound machines because

Most commercial compound dc generator are normally supplied by manufacturers as ______ compounded machines.

Centrifugal pumps, fans-blowers use

A 200 V dc motor has external resistances of Ra and Rf in armature and field circuits respectively. The starting current is reduced when

Interpoles are used to start the dc motor above the base speed.

Separately excited dc generators are used in

Which of the following are applied with differential compound motor?

The manufacturer has mentioned a medium starting torque and 15% speed regulation. The most appropriate motor for his requirement is

There is an application which required pulsating loads, punch presses. The most preferred machines would be

A d.c. generator has been provided tappings on the armature winding at intervals of 120 degrees from the side of commutator. The connection will be

Inspite of heavy initial investments, dc motors are used due to

Hoists, cranes and battery powered vehicles use _________ motors in the locomotive.

Long back ago, magnetic casette were in use, having permanent magnet dc motors which had

If a dc shunt motor is stopped by forcing starter handle back to OFF position, then