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lurker_soo
Joined: 04 Sep 2004
Posts: 2
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 11 Jan 2005 11:49 How to design a rated current power supply? |
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| A rated curent power supply system for Stepper Motor, 500mA,DC,Input Voltage:24V.How should I do?Thanks!!!
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Lord Loh.
Joined: 19 Jun 2004
Posts: 199
Location: Texas
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14 Jan 2005 21:30 How to design a rated current power supply? |
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What to you mean by a rated current power supply ?
If you need 24v and 500mA together you may use LM150 or LM138 linear power regulators...These can deliver the current you need at the voltage that you adjust...
You will need a trasformer, rectifier, Shunt capacitor filter and the IC...
Hope this helps...
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nicleo
Joined: 06 Sep 2004
Posts: 717
Helped: 60
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15 Jan 2005 2:06 Re: How to design a rated current power supply? |
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| lurker_soo wrote: |
| A rated curent power supply system for Stepper Motor, 500mA,DC,Input Voltage:24V.How should I do?Thanks!!! |
The components you select for the power supply should be able to carry the amount of 'rated current'.
Transformer -> bridge -> LM317 (with heatsink)
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s_a_r_a
Joined: 04 Jul 2002
Posts: 21
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15 Jan 2005 23:31 Re: How to design a rated current power supply? |
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I agree with nicleo.
The simplest way to realize the power supply you need is
building a linear power supply using the LM117 voltage regulator.
"The LM117 series of adjustable 3-terminal positive voltage
regulators is capable of supplying in excess of 1.5A over a
1.2V to 37V output range."
You can choose the LM117 in TO220 package and you should use an heat-sink.
For the way to realize the linear power supply (transformer, rectifier, filter, voltage
regulator) I think you can find a great deal of documentation.
For the way to use the LM117 to adjust its output to your desired voltage, you can read the LM117 series data sheet available on National site.
Regards
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IanP
Joined: 05 Oct 2004
Posts: 6490
Helped: 1542
Location: West Coast
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16 Jan 2005 6:05 Re: How to design a rated current power supply? |
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I think L200 is better option as in the LM117(317) the current is limited to fixed 1.5A and to change it, having still voltage adjustable, you need external circuitry.
L200 will use only single resistor to set current limit to 500mA or different (up to 2A).
Data sheet here:
http://www.st.com/stonline/books/pdf/docs/1318.pdf
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