once the gate has triggered conduction between cathode and anode, the gate has no further control; conduction will continue until power is removed from the cathode to anode circuit.
HOLDING CURRENT: The minimum value of current that must be there to provide a path between anode and cathode to flow anode current and thus maintain a thyristor in the on state.0 LATCHING CURRENT: The minimum anode current required to maintain a thyristor in on-state immediately after a thyristor has be triggered on. IL>IHrate of flow of charge is known as current
A thyristor is a semiconductor device which acts as a switch.
Triac is the current control device.
A thyristor if conducting will have a very small voltage drop across if not then the rail voltage will be evident across the device
A: Two conditions one the gate has current flowing trough the other is forward voltage breakdown
Latching current is the current flowing between anode to Cathode when thyristor is turned on using gate pulse. If the gate pulse is removed before the required min amount of latching current value is not reached thyristor will turn off. To keep the thyristor in on state the gate pulse duration should be so adjusted that the min latching current value is reached before it ends.
HOLDING CURRENT: The minimum value of current that must be there to provide a path between anode and cathode to flow anode current and thus maintain a thyristor in the on state.0 LATCHING CURRENT: The minimum anode current required to maintain a thyristor in on-state immediately after a thyristor has be triggered on. IL>IHrate of flow of charge is known as current
A thyristor is a semiconductor device which acts as a switch.
its output voltage can be conrolled by changing gate signal akash pilani
Triac is the current control device.
A thyristor if conducting will have a very small voltage drop across if not then the rail voltage will be evident across the device
The thyristor functions in such a way that when the anode voltage is greater than the cathode voltage , it is not triggered but only triggers when a gate signal is applied at the gate of the device.
A: Two conditions one the gate has current flowing trough the other is forward voltage breakdown
If it is a physical switch, this is called a "relay" or a "contactor". If it is a semiconductor device, it is typically a triac, SCR or a thyristor.
current holding in nothing but just hold the current. But in latch current in store for time in a temporary memory for some timeConcerning thyristors, according to the paper Thyristors - Theory, Parameters and Applications from Jurek Budek (Bedfrod Applications Lab) Holding current is the minimum value of anode current required to maintain the Thyristor in the on-state. While Latching current is the minimum value of anode currentrequired to maintain the Thyristor in the on-state immediately after switching from the off-state to the on-state has occurred and the triggering signal has been removed.When not stated assume latching current to be 3 time holding current.
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.
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.