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Requirements of power supply for mid frequency inverter spot welder [DCS07]

Dec 22,2023

According to the basic principle and technological requirements of resistance welding, the main power supply of mid frequency inverter spot welding machine has the following characteristics:

* Output high current, low voltage

* The power supply is large and adjustable

* Generally no no-load operation, low load persistence rate

* A variety of power supply methods are available

The specific choice of which power supply mode depends on the nature of the material to be welded, the welding process requirements of the welded parts, the cost of equipment investment and the user's power grid situation and other factors.

mid frequency welders in line

The power supply parameters of the power grid of the medium frequency inverter spot welder should be in line with the industrial electricity in the using area. The most common power supply is 380v, 50Hz, 3 phases. The electrical circuit that is not connected to the ground in the welding machine should be no less than 2.5MΩ under the specified conditions of use. And ensure that in conditions like the power supply voltage fluctuation within ± 10% (when the frequency is rated), or the power grid frequency fluctuation is not greater than ± 2% (when the voltage is rated), the welding machine can work normally.

For electrical circuits that are not connected to the ground and whose operating voltage is less than or equal to 220v in the welding machine, the specified test voltage of 1700v should be borne for 1min.

Electrical circuits with operating voltage greater than 220v and less than or equal to 380v should withstand the 2000v test voltage for 1min (individual components in the electrical circuit are allowed to be removed or shorted from the circuit during the test due to their own characteristics).

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