Dan Sun
Standard Member
I did not use the original SAIC MOTOR inflator, shipped with my MG ZS EV, because I had another air pump worked very well for years.
since I worked in my garage, so I did not use the car's 12V DC power socket, instead, I used a AC/DC converter, that I purchased / modified from a DELL computer adapter:
it is a 12V*18A~220W switching power supply, worked very well with all my car electronics , except the SAIC inflator:
the AC/DC power supply indicator is Green while just connecting the inflator and the indicator will turns off once the inflator switched on, for less than 1 seconds. I think the inflator trigged the Over Current Protection function inside the AC/DC converter.
I did not try the car's 12V power socket, I am afraid that the 12V fuse will be blown out.
I opened the SAIC inflator, and found the power wires directly connect to its internal DC motor. that explains why the inrush current is so high and trigged my AC/DC power supply's OCP.
I seached the Internet and found the most easy way to limit the inrush current, is to put a NTC power thermistor. I have a spare TV power board, and I removed a NTC thermistor from it, and then serial connects to the power cord, and the inflator worked fine now. the component is very small and can be put inside the inflator's switch box: the NTC thermistor marking is SCK 035.
If you have not used the shipped inflator, please be careful. and I think such a change is good anyway.
since I worked in my garage, so I did not use the car's 12V DC power socket, instead, I used a AC/DC converter, that I purchased / modified from a DELL computer adapter:
it is a 12V*18A~220W switching power supply, worked very well with all my car electronics , except the SAIC inflator:
the AC/DC power supply indicator is Green while just connecting the inflator and the indicator will turns off once the inflator switched on, for less than 1 seconds. I think the inflator trigged the Over Current Protection function inside the AC/DC converter.
I did not try the car's 12V power socket, I am afraid that the 12V fuse will be blown out.
I opened the SAIC inflator, and found the power wires directly connect to its internal DC motor. that explains why the inrush current is so high and trigged my AC/DC power supply's OCP.
I seached the Internet and found the most easy way to limit the inrush current, is to put a NTC power thermistor. I have a spare TV power board, and I removed a NTC thermistor from it, and then serial connects to the power cord, and the inflator worked fine now. the component is very small and can be put inside the inflator's switch box: the NTC thermistor marking is SCK 035.
If you have not used the shipped inflator, please be careful. and I think such a change is good anyway.
