Yea Neutral pin reference ke liye use hota hai. Ys me to bldc compressor hota hai, to compressor ka rotation ka steps determine karne ke liye yea Neutral pin use hota hai. Compressor ka uvw me se har ak step me do pin kam me lagta hai, ak pin open raita hai, to kuki yea bldc compressor hai to, to iska undar ka magnetic field ke bajai se yea open pin me voltage banega wo Neutral pin ke reference ke hisab se, or issi voltage ko detect karke MCU compressor ka next step or phase deside karega.
