REXROTH PSG Serie Betriebsanleitung Seite 118

118 Bosch Rexroth AG
Information on this product
Example:
• Longest weld time:
• Shortest cycle time:
400 ms
In this example, the following result is obtained for ED[Di]:
ED [Di] =
Calculate the max. duty cycle ED[Tr] of the welding transformer for
2.
your application.
Since the thermal capacity of the welding transformer is
considerably higher, its maximum permitted duty cycle is determined
on the basis of the welding cycle with a maximum integration time of
approx. 1 minute.
Example:
• Period of time for integration time:
• Number of Welds:
• Weld time per spot weld:
20 spots
per spot weld: WLD = 400 ms
In this example, the following result is obtained for ED[Tr]:
ED [Tr] =
In the course of the process, use the load diagram of your trans­
3.
former.
For the matching load diagram, please refer to the type-specific ope­
rating instructions of your MF welding transformer.
Load curves show absolute limit values!
For reliable continuous operation, we recommend using the limit va­
lues of the diode characteristics by 80% max. only!
PSG xxxx |
400 ms
2 sec
2000 ms
WLD
400 ms
400 ms
*
100 % = 20 %
2000 ms
60 sec
1 * 20 spots
400 ms
60s
1 * 20 spots * 400 ms
60000 ms
1070087062 / 08
WLD
* 100 % = 13.3 %