Classification and introduction of grounding points
● The power supply is grounded to the zero potential on the negative pole of the battery. ● The whole vehicle is connected to each other on the whole vehicle, and the conductive body sheet metal, chassis or engine parts, etc. ● The power signal is grounded to the power feeder of various electrical components on the vehicle. According to the size/waveform of the current in the loop, it can be divided into “dirty ground” or “clean ground”. Clean ground: Ground with peak current less than 1 A, such as sensor signal feedback or control signals between different components (eg network communication). Dirty ground: PWM loads with peak current greater than 1 A and switching loads greater than 1 A, such as motor and switching loads. ● RF ground is often used as a ground to control RF interference. This type of ground is generally installed directly on the body sheet metal through assembly and cannot be used as a bypass for any ground current. 5) The grounding of the antenna is like the grounding of the radio antenna.