This calculator can help you determine the correct amount of inductance for a wanted phase lead in microseconds. The adjustable inductor of a DRSSTC Universal Driver 2.1 is normally adjust while observing the zero current switching on a oscilloscope. The resonant frequency will normally vary up to 5-10%, depending on how heavy a spark load the system is feeding into.
Insert the values of your resonant frequency, variable inductor value and current transformer shunt resistor.
Math used in Phase Lead Calculator
The reactance of the variable inductor L is calculated for the resonant frequency. Phase lead in Radians is calculated with ARCTAN to XL/R and the resulting phase angle is converted to a time in us.
Phase lead time calculation is based on idea and sketch by ArcAttack!