Frequency conversion control principle of frequency conversion air conditioning

Air conditioning switched on, the PTC get indoor to outdoor 220 v alternating current (ac), if the diaphragm normal frequency conversion power, switching power supply output + 5 v to the CPU to work outside the machine, and machine within the CPU to establish communication between inside and outside the machine, the machine have to electric power relay and absorption, make the electric motor fan cover mechanical and electrical source is no longer by PTC, as shown in figure 14. Three minutes later, the machine CPU output "three phase six take" trigger signals and outer fan running, outside the compressor and the fan operation. Machine outside the CPU through the galvanometer coil machine wholesalemotor.blogspot.com plate compressor operation to set up the feedback signal, if the compressor can not start properly, abnormal operation feedback AC lamination synchronous generator signal, output frequency signal to stop 1 minute after the CPU and fan after 30 seconds to stop running. IPM flow or overheating, Vfo end output signal to the machine outside the CPU, outage protection.