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Rooney
Associate

Join Date: Jun 2009
Posts: 49

SCR vs Diode Based Rectifiers

11/06/2012 2:02 AM

Dear all,

Request for your inputs -

1. What is the difference between a Thyristor and a Diode based rectifier. Which is better?

2. What is the efficiency of a Thyristor and a Diode based rectifier?

3. Is there any method by which we can increase the loading of a rectifier?

4.How to check the voltage drop between the electrodes or the cathode and the anode?

Your response will be highly appreciated!

Thank you,

Regards,

Rooney
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Joshi
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Join Date: Oct 2007
Location: India
Posts: 1246
Good Answers: 34
#1

Re: SCR vs Diode Based Rectifiers

11/06/2012 2:51 AM

Please bear with me, if I am not able to articulate well.

1. Thyristor is a triggered one-way switch, its duty cycle can be controlled. Diode is a one-way device as long as anode is positive with respect to cathode.

2. Efficiency will depend on circuit design.

3. Yes. Connect more loads to it.

4. Connect a volt meter on suitable range, across both.

Personally, I don't post to threads to garner appreciation.
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binod panthee
Active Contributor

Join Date: Jul 2012
Location: kathmandu,nepal
Posts: 13
#8
In reply to #1

Re: SCR vs Diode Based Rectifiers

11/22/2012 1:34 AM

correct comment ,i am agree on these comments..thanks for comment.
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PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#2

Re: SCR vs Diode Based Rectifiers

11/06/2012 3:20 AM

A1) It's a bit like asking, "Which is better, a car, or a pick-up van?". They do different jobs.

A2-4) See #1↑.

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truth is not a compromise
Guru

Join Date: Apr 2011
Posts: 8006
Good Answers: 286
#3
In reply to #2

Re: SCR vs Diode Based Rectifiers

11/06/2012 6:08 AM

I am interested....Please tell me more about this...how did you call it.... 'pick-up van'?

.

Would it be compatible with pulse and glide operating techniques?

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JRaef
Guru
United States - Member - New Member Engineering Fields - Power Engineering - New Member

Join Date: Sep 2006
Location: California, USA, where the Godless live next door to God.
Posts: 4665
Good Answers: 804
#4
In reply to #3

Re: SCR vs Diode Based Rectifiers

11/06/2012 9:45 AM

'pick-up van'

I had one of those in the '70s. It's a tricked out van in which you pick up chicks. Mine had a matress in the back.

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truth is not a compromise
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Join Date: Apr 2011
Posts: 8006
Good Answers: 286
#5
In reply to #4

Re: SCR vs Diode Based Rectifiers

11/06/2012 1:35 PM

OHHH! I think I know what type you mean.

It's the 'If this van is a-rockin' don't come a-knockin'....and this van will always be a-rockin' type, right?

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binod panthee
Active Contributor

Join Date: Jul 2012
Location: kathmandu,nepal
Posts: 13
#6

Re: SCR vs Diode Based Rectifiers

11/07/2012 12:33 AM

the scr (thyrister) is full wave controller rectifier ...it has high efficiency and better then diode rectifier ...which is uncontrolled rectifier ..it has poor efficiency ..
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gmphadte
Power-User

Join Date: Nov 2012
Posts: 183
Good Answers: 6
#7
In reply to #6

Re: SCR vs Diode Based Rectifiers

11/21/2012 6:31 AM

Sorry, nothing like that.

To the OP

How to measure the voltage drop on a diode

What is the input supply to the diode...

If it is AC, then the answer is... u cannot do it with a multimeter.

If it is dc, just measure across the diode when it is forward biased.

If u select diode range on your DMM and connect a diode across it, with red to anode, it will show the forward voltage nearly 0.4 to 0.6 volt

Gajanan Phadte
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binod panthee (2); gmphadte (1); Joshi (1); JRaef (1); PWSlack (1); truth is not a compromise (2)

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