Instructions For Assembly And Operation; Controlling The Inverter; Khz Firing Pulses; Function - Bosch PSU 5000 Series Instructions For Assembly And Operation Manual

8

Controlling the inverter

8.1 5 kHz firing pulses

8.1.1 Function

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PSU 5000 / PSG 3000

Instructions for Assembly and Operation

ATTENTION!
Danger of injury and/or damage to property through missing or inappropriate inter-
!
pretation of fault messages!
If the inverter is not controlled by a Bosch timer it must be ensured that closing of
the floating contact between terminals 4 and 5 or opening of the connection be-
tween terminals 5 and 10 of the X5 terminal connector at the inverter stops the
timer!
This section contains an explanation of the principles for controlling the inverter.
The inverter can be controlled with 5 kHz firing pulses (default) or with a 24 V weld
time signal and an analog input voltage.
For the integration of the inverter in the welding system, please refer to Section 11.
The inverter can be controlled with 5 kHz firing pulses. In this case, it inverts the
firing pulses into the weld time and the current setpoint value.
Example:
50 / 60 Hz
system frequency
incoming 5
kHz firing
pulses
PSU weld time
(transistor firing)
U
I
10 ms / 8.33 ms skew
Uset
Skew between weld timer and inverter = 10 ms / 8.33 ms
Controlling
the inverter
cool time
10 ms / 8.33 ms skew
t
t
t
8--1