# what is firing angle?

what is firing angle?

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Firing angle is the angle at which the sin angle is delaying to start the waveform.

Firing angle is time in electrical degrees from the instant the valve voltage is positive to the application of firing pulse to the valve (start of conduction). Also called delay angle.

## Related Questions

Define: i) Firing angle ii) Conduction angle
Last Answer : (i) Conduction Angle (β): Conduction angle is defined as the angle between the instant the SCR is triggered or turned on and the instant at which the SCR is turned off. Assuming that the SCR ... maximum average output voltage to the angle when the SCR is actually triggered or fired by gate pulse.

When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a load is 30°, the displacement power factor of the rectifier is
Last Answer : When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a load is 30°, the displacement power factor of the rectifier is √3/2

What is meant by firing angle of thyristor?
Last Answer : The point at which SCR is triggered is known as firings angle of thyristor.

Explain the concept of lagging and leading phase angle by waveform.
Last Answer : i) Leading phase angle :  When two ac quantities of same frequency do not attain their respective zero or peak values simultaneously, then the quantities are said to be out-of-phase quantities. The ... Similarly, in the second diagram, the voltage is said to be lagging the current by  Φ.

How to find total impedance Z, current I and Impedance angle ?
Last Answer : How to find total impedance Z, current I and Impedance angle ?

Phase margin is the amount of angle to make the system  (1) Oscillatory (2) Stable (3) Unstable (4) Exponential
Last Answer : Phase margin is the amount of angle to make the system Unstable

The power factor angle and torque angle of a salient pole synchronous generator drawing a current of 1.0 pu from a lagging load are 45o and 15o, respectively. The direct axis and quadrature axis currents, respectively, are (A) 0.5 pu ... pu, 0.5 pu (C) 0.707 pu, 0.707 pu (D) 0.5 pu, 0.5 pu
Last Answer : The power factor angle and torque angle of a salient pole synchronous generator drawing a current of 1.0 pu from a lagging load are 45o and 15o, respectively. The direct axis and quadrature axis currents, respectively, are 0.866 pu, 0.5 pu

Torque angle for the synchronous machine is the angle between (A) stator magnetic field and rotor magnetic field (B) stator magnetic field and net magnetic field in the air gap (C) rotor magnetic field and net magnetic field in the air gap (D) excitation voltage and impedance voltage drop
Last Answer : Torque angle for the synchronous machine is the angle between rotor magnetic field and net magnetic field in the air gap

The product of apparent power and cosine of the phase angle between circuit voltage and current is?
Last Answer : In parllpar reasonans RLC circuit the current is

What will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value ?
Last Answer : 90° will be the phase angle between two alternating waves of equal frequency, when one wave attains maximum value the other is at zero value.

The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of______degrees.

Two waves of the same frequency have opposite phase when the phase angle between them is?
Last Answer : Two waves of the same frequency have opposite phase when the phase angle between them is 180°.

Tangent of angle of friction is equal to?
Last Answer : Tangent of angle of friction is equal to coefficient of friction.

Angle of friction is the?
Last Answer : Angle of friction is the angle between normal reaction and the resultant of normal reaction and the limiting friction.

Last Answer : If the current in a capacitor leads the voltage by 80°, the loss angle of the capacitor is 10°.

Last Answer : The coupling angle or load angle of synchronous motor is defined as the angle between the rotor and the stator poles of opposite polarity.

What is the maximum value of torque angle in synchronous motor?
Last Answer : The maximum value of torque angle in synchronous motor is 90 degrees electrical.

The synchronous motor will develop maximum power when the load angle is?
Last Answer : The synchronous motor will develop maximum power when the load angle is 900.

What is power factor angle?

In a 230 V, 50 Hz single-phase SCR bridge converter operating at a firing delay angle, α and with large R-L load, the input source current is (A) sinusoidal current (B) constant dc current (C) continuous rectangular pulses (D) alternating rectangular pulses
Last Answer : In a 230 V, 50 Hz single-phase SCR bridge converter operating at a firing delay angle, α and with large R-L load, the input source current is alternating rectangular pulses

After firing as SCR, the gating pulse is removed. The current in the SCR will  1. remain the same 2. immediately fall to zero 3. rise up 4. None
Last Answer : After firing as SCR, the gating pulse is removed. The current in the SCR will remain the same

What is the control range of firing angle inac voltage controller with RL load?
Last Answer : The control range is Φ< α

What is delay angle or what is firing angle of phase controlled rectifier?
Last Answer : The delay angle is the angle at which thyristors are triggered after zero crossing. After zero crossing of supply voltage, one pair of thyristors is forward biased. After delay angle(α) these SCRs are triggered.

What is firing angle?
Last Answer : The angle between the zero crossing of the input voltage and the instant the SCR is fired is called as delay angle or firing angle.

What is firing angle?
Last Answer : The angle in the AC cycle at which the thyristor starts conducting at the application of positive voltage to gate is known as the firing angle (α)

Regenerative breaking of ac-dc converter fed dc motor is possible when firing delay angle of SCRs is (A) 30° (B) 60° (C ) 90° (D) 120°

A separately excited d.c. motor fed from single phase full converter with firing angle 60° runs at 1000 r.p.m. If motor is connected to single phase semiconverter with the same firing angle of 60°, it would run at (a) 2000 rpm (b) 1850 rpm (c) 1500 rpm (d) 1000 rpm

A single-phase fully controlled thyristor bridge ac-dc converter is operating at a firing angle of 25o and an overlap angle of 10o with constant dc output current of 20 A. The fundamental power factor (displacement factor) at input ac mains is  (A) 0.78 (B) 0.827 (C) 0.866 (D) 0.9
Last Answer : A single-phase fully controlled thyristor bridge ac-dc converter is operating at a firing angle of 25o and an overlap angle of 10o with constant dc output current of 20 A. The fundamental power factor (displacement factor) at input ac mains is 0.78

In static Kramer drive, motor turns ratio is 0.6, the firing angle is 120o. The motor slip is   (a) 0.633 (b) 0.533 (c) 0.833 (d) 0.733
Last Answer : In static Kramer drive, motor turns ratio is 0.6, the firing angle is 120o. The motor slip is 0.833

A single phase fully controlled thyristor bridge ac -dc converter is operating at a firing angle of 25 degree and an overlap angle 10 degree with constant dc output current of 20A. The fundamental power factor (displacement factor) at input ac mains is : (A) 0.78 (B) 0.827 (C) 0.866 (0) 0.9

Last Answer :  If firing angle in SCR increases, output is Decreases

Should condemned prisoners have the choice of how they die? Would you choose the option to die by firing squad?
Last Answer : Can you really call it a choice, if one of the choices is not “to die of old age”?

Is president Trump firing people for superficial reasons?
Last Answer : Scaramoucci can’t spell Scaramucci…oops, maybe that’s why he’d no longer with us!!!

What is your opinion, of a world leader discrediting, or firing all the people who investigate their potential crimes?
Last Answer : At first I thought you might be referring to your President, but that “world leader” thing eliminates that possibility. In any event, it’s a predictable reflex.

Whats your theory behind the Scaramucci firing?
Last Answer : Hey! Little Tony’s a mechanic. Mechanics do dat.

Why is Trump visiting the Russian ambassador today, one day after the firing of James Comey?
Last Answer : To tell them to look out for trouble? To get more political advice?

Did Cobert intend his audience to cheer about the firing of James Comey?
Last Answer : Yellowdog i think he was shocked by the cheering.

How suspicious does this look? A day after firing Comey for investigating the Russia connection, Trump is meeting the Russian Foreign Minister?
Last Answer : All I can say is, the man thinks because he’s the president he can do anything and no one has the right to object. Therefore he doesn’t need to hide anything.

Okay it is real now, what do you think of Trump firing 50 or 60 missiles in Syria?
Last Answer : Promise kept. He said he would never speak of military actions in advance. I think he made the right move. It was an action which called for an ass-kick. He’s a dog that bites with no warning bark. Bam! Don’t frick with that.

Do you think North and South Korea firing shots at each other's boats today is the start to World War III?
Last Answer : No, it has been happening off and on for years. China is getting pretty tired of N Korea as a client state, and will quite likely tell Pyongyang to knock it off if it ever gets dire.

How many chances do you give someone before firing them?
Last Answer : answer:3 for a minor infraction 1 for a major infraction

Does anyone else find it ironic that Republicans are bashing Romney for talking about firing bad insurance companies?
Last Answer : answer:No, not ironic so much as disheartening. Not really doing anybody any favors with the mud-slinging. That said, Romney should know better than to leave any word or phrase to chance. Statesmanship is ... impact of words on listeners and I think he's not too bright for leaving that to chance.

What, besides coefficient of expansion, could make two pieces of glass incompatible for firing together?
Last Answer : Melting point would be my guess. The Fuseworks is for microwave kiln use.

Firing glass in a kiln: can a piece be fired twice?
Last Answer : Yes. Firing at these low temperatures doesn’t make any fundamental change in the structure of the glass.

What do you think of NPR's firing of host Juan Williams for stating his opinion which is a fear of Muslims being on the same plane with him?
Last Answer : It was a totally inappropriate comment for a professional journalist to say, and he deserved to be at least reprimanded. NPR very carefully tries to keep itself above controversy. They also told their members to stay away from the Colbert/Stewart rally.

Do you think that firing House's original team(Cameron,Chase and Foreman)was a bad move(from the TV show House MD)
Last Answer : I love House. No I think it was a good idea. It brought new character’s in and made the plot shift and exciting to me. One of the new character committed suicide. I just watched the rerun.

State of Utah uses firing squad to execute a killer. any comments?
Last Answer : All methods of capital punishment are very distressing. I’m from PA so Utah seems like a very strange place to begin with. We apparently have the death penalty but according to deathpenaltyinfo.org, the state has only executed three people since 1976. Super creepy. At least he got to choose, huh?

Would you face the firing squad?
Last Answer : answer:It’s more exciting, I suppose. Besides, maybe he’s scared of needles. I’d choose lethal injection, if I had to. I’ve always been fascinated whenever I get shots. May as well go out with something I know I’m cool with.

How far would you go to protect a fellow worker, wrongfully accused of something, resulting in their firing?
Last Answer : answer:I would stick up for them in the sense that I wouldn't mind telling HR I know what happened and they are innocent. I wouldn't go any further than that though b/c I'm not risking my ... aren't many well paying jobs out there right now. And I wouldn't expect anything more of that friend.