What is difference between inverter and converter?

In English, there is generally a definition word in front of CONVERTER, such as TEMPERATURE CONVERTER (a device that converts temperature into other physical quantities), MP3 CONVERTER (software that converts other music file formats to MP3 format), CURRENCY CONVERTER (a currency conversion device) A calculator for another currency), BIG5-GB CODE CONVERTER (a transcoder that converts traditional characters to simplified characters), PDF CONVERTER (PDF file format interchange software), etc. In English-speaking countries, CONVERTER is not defined as a frequency converter, but rather FREQUENCY CONVERTER (frequency converter). Because there is more than one type of FREQUENCY CONVERTER (frequency converter), the more formal English name for the frequency converter is VARIABLE FREQUENCY DRIVE (variable frequency drive), or VFD for short.

Besides inverter, the English meaning is relatively simple, referring to a device that converts direct current into alternating current. Unlike CONVERTER, when used alone in English-speaking countries, INVERTER refers to DC-AC inverters; lamp DC-AC converter) etc. However, many non-English-speaking countries also call the inverter INVERTER, because the main power device of the inverter is also DC-AC conversion, which is in line with the working principle of INVERTER. Because more people use it, the INVERTER representative inverter is gradually accepted by the English-speaking people.