A Susceptor Heating is a conductive metal material that is used to transfer heat to another piece of metal or non-conductive material. Susceptors are often made from graphite because it is highly resistive and very machinable, or alternatively from stainless steel, aluminum, or other materials.
The testing was done in an open air atmosphere. A specially-designed, two turn helical coil was used to provide optimal heating to the cup end of the electrical connector. Initial tests were conducted with bare parts and temperature sensing paints to establish time-to-temperature and heating profiles. Next the solder paste was inserted into the cup area and RF heat was applied with the RF power supply. The optimum soldering temperature of 390°F was reached in 10 seconds, causing the solder in the cup to melt.
Parts & Materials Description: Silver plated copper electrical connector, 0 gage size, solder paste
Temperature Required: 390°F
Induction Heating Equipment: 3 kW RF power supply, two-turn helical induction coil
Operating Frequency: 250 kHz.