The rotating amplifiers are widely used in
The rotating amplifiers are applicable in feedback systems giving large amplified outputs.
The quantity which make rotating amplifier applicable in large power levels is/are
The rotating amplifiers have stable transient conditions, which makes them favourable to use in high power sectors.
The ordinary dc machines are not favourable as amplidynes due to
The sluggish transient response of the ordinary dc machines makes them inappropriate to use them in amplidynes.
In rotating amplifiers, armature reaction mmf of the first stage is made to act as field flux for second stage.
Yes, the reaction mmf of the first stage is made to act as field flux for second stage to have faster transient response.
The cross field machines have
The cross field machines have two fluxes electrically in quadrature.
In cross field rotating amplifiers, there is
There are two stages for flux generators in order to have faster response in the system.
Metadyne is _________ feedback with respect to main ___________
Metadyne is negative feedback with respect to main current flowing in the second stage set of motors.
An amplidyne, d-axis flux is always neutralized due to
The d-flux is neutralized by compensating winding at all possible loads as the same flux will be produced but in the opposite direction so as to cancel the flux.
In amplidynes, the resultant d-axis flux is
The resultant d-axis flux lies along the main field poles and are so field flux. The d- axis is completely under the control of field winding and is unaffected by direct axis current.
Amplidynes are best applicable in
Amplidynes find applications in feedback systems with large power handling requirements.
Interpoles provide mmf more than armature mmf in a dc machine.
Interpoles nullify armature cross magnetizing flux and the reactance voltage. So it is more than the armature mmf for a good efficient machine.
The delay of the commutation occurs due base cause of emf induced due to
The commutation in dc machines is delayed because of the emf induced in the coils and the mutual interaction of the field with neighbour coils.
I. DC shunt motor – variable speed application
II. DC compound generator – constant supply voltage
III. Differentially compounded motor – welding purposes
Above are the applications of the dc machines , but all are not matched correctly. Choose the wrong marking
Differentially compounded generators are used for welding purposes, not motors.
I. DC shunt motor – Lathe machine
II. DC compound generator – Drilling machine
III. Differentially compounded generator – welding purposes
Above are the applications of the dc machines, but all are not matched correctly. Choose the wrong marking
DC compound generators are used for maintaining constant voltage across the terminals.
Mark the order for the decreasing order of the voltage regulation for dc generators
Dc shunt motor is almost constant speed generator and thus its voltage regulation is very good than all and differential compound generator has most poor v.r.