0
For the same reason that its used in transistors and resistors...Its a semiconductor.
Wiki User
∙ 14y ago
Wiki User
∙ 11y agoBecause scr also works in unidirection dats why it is known as rectifier.
Add your answer:
Earn +20 pts
Why Silicon Controlled Rectifier is called current controlled device?
Because it is controlled by the gate current
Difference between silicon-controlled rectifier and diode?
silicon controlled rectifier is a 3 terminal 4 layer device which has 2 consecutive P N junctions here the three terminals called anode, cathode and gate gate controls the conduction of the scr but diode just conducts in forward bias and blocks in reverse bias
What is semi controlled rectifier?
such a control rectifier that control or rectifier single phase. for that purpose we used SCR that is called single phase controlled rectifier.
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.
Why an op-amp diode rectifier called as a precision rectifier?
In a rectifier made of just diodes, the diodes have a voltage drop, resulting in a lower DC output voltage. By introducing an Op-amp, this voltage drop can be overcome. Since there is no voltage drop caused by the diodes, the rectified signal is not changed by the rectifier, so it is called a precision rectifier.
Why Silicon Controlled Rectifier is called current controlled device?
Because it is controlled by the gate current
Difference between silicon-controlled rectifier and diode?
silicon controlled rectifier is a 3 terminal 4 layer device which has 2 consecutive P N junctions here the three terminals called anode, cathode and gate gate controls the conduction of the scr but diode just conducts in forward bias and blocks in reverse bias
What is the use of thyristor?
Function of a thyristorA thyristor - also known as an SCR (silicon controlled rectifier) - is like a very fast static switch and is good for controlling large amounts of power (called power regulation) and for controlling the speed of dc motors. Another typical application is to make dimmers for lighting circuits.How it worksA thyristor is semiconductor device having 3 electrodes:an anodea cathodea gateNo current can travel from the anode to the cathode until a pulse which has the right amount of voltage (called the "trigger voltage") has been applied to the gate for the right minimum amount of time (called the "trigger duration") which causes the thyristor to switch on to allow current to flow through it from the source to the load.After being triggered, current continues to flow through the thyristor from the source to the load until either:the load gets disconnected from the thyristor by some other means orthe supply of current from the source to the thyristor gets turned off by some other means.
What is single phase Controlled rectifier?
such a control rectifier that control or rectifier single phase. for that purpose we used SCR that is called single phase controlled rectifier.
What is semi controlled rectifier?
such a control rectifier that control or rectifier single phase. for that purpose we used SCR that is called single phase controlled rectifier.
What is phase control?
such a control rectifier that control or rectifier single phase. for that purpose we used SCR that is called single phase controlled rectifier.
Why thyristor is called controlled device?
its output voltage can be conrolled by changing gate signal akash pilani
What is overlap angel of a thyristor?
Overlap angle of a rectifier (μ): The commutation process in a practical rectifier is not instantaneous. During the period of commutation, both the incoming and the outgoing devices conduct current simultaneously. This period, expressed in radians, is called the overlap angle "μ" of a rectifier. It is easily verified that α + μ + γ = π radian.α= Firing angelμ=Overlap angelγ =extiction angel
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.
Why germanium controlled rectifiers are not used instead of silicon controlled rectifiers?
The first solid state four layer thyristors made were indeed made of germanium and therefor could be called "germanium controlled rectifiers" (although this name was never used in the literature, they were just called thyristors). But when it became practical in the early 1960s to make solid state devices using silicon, the higher operating junction temperature and the ability to self passivate junctions in silicon devices soon made germanium devices obsolete especially for high power applications (which include many of the applications of solid state four layer thyristors).The term thyristor was coined originally for these devices as they were seen as a solid state version of the gas filled thyratron tube. The idea of calling them "controlled rectifiers" only came years later when silicon had replaced germanium for most purposes in solid state devices.
What is the thyristor firing circuit?
The thyristor is basically used a switch in an AC circuit to control the amount of power fed to the load. To turn on this switch an "electric" pulse should be applied to the Gate terminal of the Thyristor. A circuit which supplies the "electric" pulse is called the firing circuit.
What device is also called a rectifier?
A rectifier is an electronic device that changes an AC voltage to a DC voltage.
