What is the composition of the maintenance part of the frequency converter? Judging from the experience of repairing the inverter, the components related to high-voltage The power supply part and the corresponding drive part circuit are damaged frequently. Of course, various faults will appear during the maintenance process. The performance is related to its corresponding electronic circuit. The repair process of the idea equipment is to find the corresponding fault point.

The three elements of fire, namely fire source, combustibles, and oxygen, are equally applicable to the analysis of electrical fire accidents and prevention. Arc is an important representative of fire source elements in electrical fires. When electrical circuit insulation is aging, damaged, connector virtual connection, line virtual connection, and short circuit, faulty arcs will occur, (arc discharge) even within the rated current range. An arc occurs, and heat is generated at the same time as the arc occurs, enough to ignite adjacent combustibles.

During the operation of the inverter, heat is generated due to the loss of power equipment in the main circuit, which will affect the normal operation of electronic equipment. If the heat dissipation capacity of the inverter system is not strong, the power dissipation will result in the internal chip of the power electronic equipment. The source region temperature rises and its junction temperature rises. The power loss of power electronic equipment is exponentially related to its junction temperature [1], that is, its function decreases as the junction temperature increases. When the operating temperature of the equipment increases by 10°C, its power loss doubles [2]. Therefore, as medium and high-power inverters are used more and more widely, in order to improve their operational functions and reliability, it is very necessary and urgent to adopt reasonable external heat dissipation methods in the inverter system.

Do you know the common misunderstandings of frequency conversion use?

Beginning in the 1960s, high-tech companies represented by Danfoss began mass production of inverters, opening a new era of inverter industrialization. It wasn't until the 21st century that my country's local frequency converters gradually emerged. At present, my country's high-end inverter market has long been monopolized by foreign brands.