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How does the area of copper-carbon contacts decide the distribution of current in commutation process of DC machine?
Wiki User
∙ 9y ago
Copper carbon decides the distribution of commutation from the rotation. It tells what direction for it flow.
Wiki User
∙ 9y ago
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What is equalizer bar ring in lap winding?
The function of equalizer rings is to avoid un equal distribution of current at the brushes,there by helping to get sparkless commutation- by rizwan ahmad
What is current crowding effect?
a nonhomogenous distribution of current density through a conductor or semiconductor, especially at the vicinity of the contacts and over the PN junctions.
What is the difference between current and voltage commutation?
Voltage commutation: This is possible in ac circuits...The thyristor gets turned off by reverse bias (negative half cycle) voltage applied across it. This is also called line commutation. Current Commutation: This is possible in dc circuits ...This type of commutation makes use of auxiliary circuit which contains inductor,capacitor,diode and even a thyristor(auxiliary). This is called Forced commutation.
What is commutation of a rectifier?
Commutation in a rectifier: Refers to the process of transfer of current from one device (diode or thyristor) to the other in a rectifier. The device from which the current is transferred is called the "out going device" and the device to which the current is transferred is called the "incoming device". The incoming device turns on at the beginning of commutation while the out going device turns off at the end of commutation.Commutation failure: Refers to the situation where the out going device fails to turn off at the end of commutation and continues to conduct current.
What is the process of commutation?
its the change or reversal of the direction of current by the combination of brush and coil.
What is line commutation?
i think i know this answer...line commutation is the commutation in single phase inverters/converters when there is current flow back to the source.. It can also refer to a method of turning of a semiconductor device known as a Thyristor or SCR, sometimes called natural commutation. In this method the current between the anode and cathode is interrupted or dropped to a point where the Thyristor can no longer maintain its latch or keep conducting, shutting the device off.
Explain Why it is important that the current in the coil of a motor changes direction every time the coil makes a half revulotion?
due to commutation the current in the coil reverses
What is the role of a commutator in an electric generator?
The purpose is to counteract the feld distorsion that is caused by the armature current. If this is left as is , the commutation properties of the gnerator will be disturbed, the commutation will not take place in the neutral zone and brush sparking occurs. With correctly sized commutating poles the commutation at the brushes will be in the neutral zone regarless of armature current, no sparking occurs, and a anual adjustment of the brushgear position at different loads is not needed
What is natural commutation of silicon controlled rectifier?
NATURAL COMMUTATION:Commutation of current from one switching device to another in a power electronics converter at the instant the incoming voltage has a higher potential than that of the outgoing wave, without the aid of any commutation circuitry.
What is the current rating for a 48 VDC contact relay?
The current ratings of the contacts of a relay are written on the side of the protective envelope that covers the contacts.
How do relay contacts become pressed together when a current passes in the coil?
Relay contacts change state (become pressed together) when a current passes through the coil because that current causes a magnetic field to be induced which attracts the armature, to which is attached the contacts.
You are Ex Naib Subedar retired on 01 August 2007 current pension after commutation 5851 how much you may get new pension?
You_are_Ex_Naib_Subedar_retired_on_01_august_2007_current_pension_after_commutation_5851_how_much_you_may_get_new_pension
