Difference between revisions of "Dclamp1"

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{{pf_top_nav}}
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{{pf_pcbs}}
  
  
 
=dclamp1=
 
=dclamp1=
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[[http://dhcp-17-197.media.mit.edu/for_wiki/hc_dclamp1-041209.pdf  SCH]]
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[[http://dhcp-17-197.media.mit.edu/for_wiki/rdclamp1t.pdf TOP]]
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[[http://dhcp-17-197.media.mit.edu/for_wiki/rdclamp1b.pdf BOT]]
  
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*w/Itest = 89mA
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==Serial #1:==
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(only passive portion of circuit assembled.)
 
<pre>
 
<pre>
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From bottom of board:
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w/Itest = 89mA
  
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R6 7 8 9 10
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(mV) voltage across (.47ohm) is:
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R5 4 3 2 1
 
  
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(mV) voltage across (.47ohm) is:
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2.5  5.7  1.4    2.3  2.3
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1.3  3.0  2.0  14.8  1.8
  
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2.5 5.7 1.4 2.3 2.3
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R6  R7    R8    R9    R10
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1.3 3.0 2.0 14.8 1.8
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R5  R4    R3    R2    R1
 
</pre>
 
</pre>
  
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*10mA 28.04V
 
*10mA 28.04V
 
*100mA 28.6V
 
*100mA 28.6V
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==scope captures==
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[http://dhcp-17-197.media.mit.edu/ankle/scope_capture/dclamp1-pulse-strong-and-week--wrt-ave.png]
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[http://dhcp-17-197.media.mit.edu/ankle/scope_capture/dclamp1-pulse-2weakest-wrt-ave.png]
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[http://dhcp-17-197.media.mit.edu/ankle/scope_capture/dclamp1-pulse-2strongest-wrt-ave.png]
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~35 volts on 10,000uF cap applied to circuit via circuit breaker.
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* blue is voltage across V+ and V- at array input
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* other traces are voltage across the 0.47 resistors.
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 +
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[http://dhcp-17-197.media.mit.edu/ankle/scope_capture/dclamp1-pulse-supply_and_strongest-wrt-ave.png]
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[http://dhcp-17-197.media.mit.edu/ankle/scope_capture/dclamp1-pulse-supply_and_strongest_400us.png]
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~35 volts on 10,000uF cap applied to circuit via circuit breaker.
 +
* green is the voltage across the 10mF cap
 +
* blue is voltage across V+ and V- at array input
 +
* magenta is voltage across 0.47 ohm resistor of strongest clamp TVS
 +
* difference between blue and green trace is the voltage drop across 12" of 14 AWG wire.
 +
* peak total current is estimated to be 53 amps

Latest revision as of 15:33, 16 October 2009

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dclamp1

[SCH] [TOP] [BOT]


Serial #1:

(only passive portion of circuit assembled.) 

w/Itest = 89mA

(mV) voltage across (.47ohm) is:

2.5   5.7   1.4    2.3   2.3
1.3   3.0   2.0   14.8   1.8

 R6   R7    R8     R9    R10
 R5   R4    R3     R2    R1

Circuit voltage with test current:

  • 1mA 27.8V
  • 10mA 28.04V
  • 100mA 28.6V

scope captures

[1] [2] [3] ~35 volts on 10,000uF cap applied to circuit via circuit breaker.

  • blue is voltage across V+ and V- at array input
  • other traces are voltage across the 0.47 resistors.


[4] [5] ~35 volts on 10,000uF cap applied to circuit via circuit breaker.

  • green is the voltage across the 10mF cap
  • blue is voltage across V+ and V- at array input
  • magenta is voltage across 0.47 ohm resistor of strongest clamp TVS
  • difference between blue and green trace is the voltage drop across 12" of 14 AWG wire.
  • peak total current is estimated to be 53 amps
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