THEORY OF OPERATION
FIGURE E.5 – OUTPUT RECTIFIER AND CHOKE
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Main Switch Board
Input
Input switch |
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| 115VAC Fan Supply | ControlFan | Primary Current Feedback(2) | IGBTDriveignalS | ||
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220 VAC |
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220 | 42VAC |
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Receptacle | 65VAC |
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To Control
Board
Feedback | Current |
Choke
SenseVoltage
Output
21 Lead
Voltage
Sense
Recp.
Positive
Output
Terminal
Negative
Output
Terminal
Yellow
Thermal
LED
Status
Red/Green
LED
R232
Connector
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OUTPUT RECTIFIER AND CHOKE
The output rectifier receives the AC output from the main transformer secondary and rectifies it to a DC voltage level. Since the output choke is in series with the negative leg of the output rectifier and also in series with the welding load, a filtered DC output is applied to the machine’s output terminals.
NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
