meta data for this page
  •  

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
eigenbau:currentstabilisation:start [2020/02/07 10:13] – [Schematic] fieneeigenbau:currentstabilisation:start [2020/02/07 10:24] (current) – [Input Signals] fiene
Line 69: Line 69:
   * All files can be found on http://bibo/git/CurrentStabilisation.git   * All files can be found on http://bibo/git/CurrentStabilisation.git
   * {{ :eigenbau:current_stabilisation.pdf |Schaltplan}} in PDF-Format   * {{ :eigenbau:current_stabilisation.pdf |Schaltplan}} in PDF-Format
-  * Die Source des Schaltplans ist auf der [[eigenbau:src:sourcen|Download-Seite des Wiki]]] abgelegt.+  * Die Source des Schaltplans ist auf der [[eigenbau:src:sourcen|Download-Seite des Wiki]] abgelegt.
  
 ==== Layout ==== ==== Layout ====
Line 111: Line 111:
 Up to now only PID A is populated (exept D) after Hacking the logic at the S&H IC, it works as expected. after switching in hold mode, the current seems to be a bit lower than the initial setpoint. this might be caused by the big hold capacitor. Maybe after 0.5 sec. it is not entirely loaded. The hold time seems to be huge, after 30s there is almost no change visible, seems to be a fraction of a Millivolt. So it might be an option to change the Cap to a smaller one, leading to a smaller hold time, but a more precise hold value. Up to now only PID A is populated (exept D) after Hacking the logic at the S&H IC, it works as expected. after switching in hold mode, the current seems to be a bit lower than the initial setpoint. this might be caused by the big hold capacitor. Maybe after 0.5 sec. it is not entirely loaded. The hold time seems to be huge, after 30s there is almost no change visible, seems to be a fraction of a Millivolt. So it might be an option to change the Cap to a smaller one, leading to a smaller hold time, but a more precise hold value.
  
-The idea of having the current on for a longer time before switching to hold mode didn't rally help, so it doesn't seem to be an problem related to the loading curve of the hold cap. after a hold time of ~4 minutes, the current monitor voltage dropped from ~39.6 mV to 39 mV.+The idea of having the current on for a longer time before switching to hold mode didn't really help, so it doesn't seem to be an problem related to the loading curve of the hold cap. after a hold time of ~4 minutes, the current monitor voltage dropped from ~39.6 mV to 39 mV.
  
 FIXME          /* Welche Signale sollten wo zu sehen sein? */ FIXME          /* Welche Signale sollten wo zu sehen sein? */
Line 120: Line 120:
  
 ^ Input              ^ Type                           ^ Description                                                                                             ^ ^ Input              ^ Type                           ^ Description                                                                                             ^
-| ULTRASTAB (D-SUB)  | analog current (differential)  | current input from current transducer,\\can be modified to differential voltage input.                  |+| ULTRASTAB (D-SUB)  | analog current (differential)  | current input from current transducer,\\ can be modified to differential voltage input.                  |
 | Current set        | analog voltage (differential)  | current setpoint                                                                                        | | Current set        | analog voltage (differential)  | current setpoint                                                                                        |
 | enable             | digital voltage (optocoupled)  | high: PIDs enabled, outputs active\\ low: disabled, MOSFET out turned to zero.                          | | enable             | digital voltage (optocoupled)  | high: PIDs enabled, outputs active\\ low: disabled, MOSFET out turned to zero.                          |