Removed from the circuit board through-hole components via multi pin component and the large heat capacity is quite troublesome, such as transformer, connector.
从电路板上拆除多引脚的通孔元件和大热容量的通孔元件比较麻烦，比如变压器、接插件。
2
To calculate self and mutual inductance of coreless transformer in printed circuit board, The author offered a new method to calculate based on Neumann equation as well as testing process and circuit.