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What else can I help you with?
Why we don't use triac in case of ac controlled rectfier rather than scr?
A TRIAC does not have a symmetrical turn-on point in the opposite quadrant. This will introduce a DC bias, which you probably don't want. You can use an SCR, and then add diodes to allow it to operate in the opposite quadrant, or you can use two SCR's. Alternatively, you can use a DIAC in the TRIAC's gate circuit to balance the turn on point.
What is SCRS..?
A SCR is a Silcon Controlled Recifier. It is a four layer device that can be conceptually considered to be two transistors in latch up configuration. (Though not exactly) For an SCR, there will be no conduction between anode and cathode until the gate / cathode junction is biased on. At that point, the SCR will latch up and conduct from anode to cathode, regardless of further changes on the gate. This condition will persist until the anode / cathode voltage drops to zero. The SCR can be used as a half wave dimmer in an AC circuit. If you want full wave operation, you need to use a bridge rectifier around the SCR, or use a TRIAC/DIAC circuit.
Is scr is necessary for speed control of a motor?
Most motor speed controllers have all the power that goes to the motor go through a SCR (usually a TRIAC). If you remove the SCR from such a system, no power will get to the motor and nothing will move -- the SCR is a necessary, critical part. However, many motor speed controllers -- in particular, most variable-frequency drives (VFD), also called inverter drives, typically use some other component to transfer power to the motor -- usually MOSFETs in low-voltage systems and IGBTs in higher-voltage systems. They don't use any SCRs, and so SCRs are not absolutely necessary for motor speed control.
How can you use an scr as oscillator?
yes
Why you don't use germanium for SCR fabrication?
In the early 1960s it was, I've seen the devices.
Why we don't use triac in case of ac controlled rectfier rather than scr?
A TRIAC does not have a symmetrical turn-on point in the opposite quadrant. This will introduce a DC bias, which you probably don't want. You can use an SCR, and then add diodes to allow it to operate in the opposite quadrant, or you can use two SCR's. Alternatively, you can use a DIAC in the TRIAC's gate circuit to balance the turn on point.
What is SCRS..?
A SCR is a Silcon Controlled Recifier. It is a four layer device that can be conceptually considered to be two transistors in latch up configuration. (Though not exactly) For an SCR, there will be no conduction between anode and cathode until the gate / cathode junction is biased on. At that point, the SCR will latch up and conduct from anode to cathode, regardless of further changes on the gate. This condition will persist until the anode / cathode voltage drops to zero. The SCR can be used as a half wave dimmer in an AC circuit. If you want full wave operation, you need to use a bridge rectifier around the SCR, or use a TRIAC/DIAC circuit.
How do you use scr as a diode?
scr is basically a three terminal device can be used as diode by leaving one terminal
Can you use a rheostat on ac motor?
Yes you can use a rheostat to control the speed of an ac motor as long as it is correctly sized (power). A better way would be to use a triac control.
Is scr is necessary for speed control of a motor?
Most motor speed controllers have all the power that goes to the motor go through a SCR (usually a TRIAC). If you remove the SCR from such a system, no power will get to the motor and nothing will move -- the SCR is a necessary, critical part. However, many motor speed controllers -- in particular, most variable-frequency drives (VFD), also called inverter drives, typically use some other component to transfer power to the motor -- usually MOSFETs in low-voltage systems and IGBTs in higher-voltage systems. They don't use any SCRs, and so SCRs are not absolutely necessary for motor speed control.
How can you use an scr as oscillator?
yes
What is a signal pulse transformer?
usually a small transformer ferrite rather than iron core for short pulses it is more for isolation than anything else trigger for scr or triac the previous question for a power pulse transformer these are in cars ignition transformers the newer cars generally have one on each cylinder the computer may feed may feed a signal pulse through the small transformer to isolate the computer from the big one. to an scr to discharge a capacitor thru the ignition transformer (cars use the terms condenser and coil)
Can you use Diac and Triac for dc supply?
The diac conducts in both directions at approximately the same voltage, making it unsuitable in an AC to DC supply. The triac also conducts in both directions, based on a gate voltage which is slightly different in the two usable quadrants. That is why the diac is often used to trigger the triac - it makes the two conduction cycles more symmetric. In both cases, the diac/triac does not make sense for an AC to DC supply, but it works well in an AC voltage regulator, such as a lamp dimmer or motor speed controller.
What is SCR Give its application?
scr is a silicon control rectifier used to control the rectifing voltage.. its a bidirectional device can use it for both the directions......
When An SCR conducts appreciable current?
And SCR will conduct appreciable current when it is gated "on" and thus "told" to conduct. A silicon controlled rectifier(SCR) is an electronically controlled DC switch, and the gate is the terminal to which the control voltage is applied. Use the link below to learn more.
How scr can control the temperature for electric hot plate?
One way is to use a microcontroller with an output pen set up with hardware PWM into the scr, the scr then controls the heating element of the hotplate. A thermistor can be added for a control feedback loop.
Why you don't use germanium for SCR fabrication?
In the early 1960s it was, I've seen the devices.
