WTC MedWeld 4000, Руководство оператора

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Advanced Software Features
MedWeld 4000 Operator’s Guide Modified: 9/17/08 7 - 23
M-032116 Programs #T03300, #T02300 and #T02400
hfc
The total number of MFDC half-cycles that were fired
during the weld.
on time
This value represents how long, in
μ
sec, the inverter
fired during the MFDC half-cycle to obtain the voltage
or current required to make the weld. The maximum time
in
μ
sec the inverter can fire during a MFDC half-cycle
is:
on time
max
= 1/(2
*
f) – IGBTOFF
Where
f = the Operating High Frequency setup parameter
value.
IGBTOFF = the minimum time required for an IGBT
to turn off. This value is set at the factory.
This is a typical example:
on time
max
= 1/(2
*
1,200) – 0.000010
on time
max
= 0.000416 – 0.000010
= 0.000406 sec.
Use this value to determine if the inverter can deliver
more voltage or current if necessary. If the on-time is less
than 406
μ
sec, the inverter can deliver more voltage or
current. If the on-time is 406
μ
sec and more voltage or
current is required, the application must be modified to
use a transformer with a higher turns ratio, or a larger
inverter.
%I
The percent current provided during the last weld. This
value results from dividing the actual current fired by the
Maximum Current setup parameter.
cf
C-Factor is 1% of the total available current. The C-
Factor is re-calculated for each weld. It is the amount of
the actual secondary current that will be added to the
total weld energy for each 1% of current:
This value is used to alert the maintenance staff of a
welder's deteriorating secondary or shunting conditions.
dcv
The DC buss voltage at the WCU. This is updated each
time the DEP-100S polls the WCU.
I
sec
%I
= C-Factor