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prasobh83
Associate

Join Date: Jun 2007
Posts: 28

DC Drive with DC Input and Output?

06/20/2007 11:24 AM

is there any dc drive having dc input and dc output.normally dc drives having ac input and dc output.
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Blink
Guru

Join Date: Aug 2006
Posts: 4484
Good Answers: 246
#1

Re: DC Drive with DC Input and Output?

06/21/2007 12:18 AM

Traction motor drives for fork lift trucks etc. are DC in, DC out.

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Abu Khansa
Power-User

Join Date: Oct 2006
Location: Indonesia
Posts: 102
#2

Re: DC Drive with DC Input and Output?

06/21/2007 12:46 AM

If you're asking about history, yes it were. There're field rheostat, armature rheostat, multiple voltage control, ward-leonard system, ward-leonard-ilgner system, field divertors, etc. But these all utilized no nowdays VSD, no thyristor technology involved.

May be the ancient types of speed control still exist 'till now, many factors are considered to pick up one of the ancient types than modern types.

But in complex modern industrial field, I think the AC input and DC output (thyristor technology) is the best choice to fulfill the business demands. No need to explain why, right?

In addition, it's not impossible to make a speed control DC-DC because history have proved it.
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Alvin
Active Contributor

Join Date: Mar 2007
Location: US
Posts: 18
#3
In reply to #2

Re: DC Drive with DC Input and Output?

06/21/2007 6:04 AM

I know there are several servo drives, for brush and brushless DC motors available. They are cheaper than the AC input models, because they don't have the rectifier and capacitors. What power level are you looking for?
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prasobh83
Associate

Join Date: Jun 2007
Posts: 28
#4
In reply to #3

Re: DC Drive with DC Input and Output?

06/21/2007 6:13 AM

i am looking for 45kw
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Bill H.
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Join Date: May 2007
Location: Hurst, Texas
Posts: 178
Good Answers: 4
#5

Re: DC Drive with DC Input and Output?

06/21/2007 10:59 AM

Can you use PWM? Large IGBT's could handle it. What are you driving?

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Abu Khansa (1); Alvin (1); Bill H. (1); Blink (1); prasobh83 (1)

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