Let's start with the basics first. You are probably aware that there two types of electrical currents in use today: Direct Current (DC) and Alternating Current (AC). DC is mostly used for small battery-powered devices, while AC is the one powering the. An inverter is a small part that is housed inside a device called the variable frequency drive (VFD). First another component in the VFD called the rectifier converts the AC. There are several advantages an inverter-equipped appliance holds over models who don't have an inverter. Inverters have a wide range of applications, and they are most commonly seen in appliances that have a motor or compressor. Whether it be in air conditioners, refrigerators, or washing machines, inverter technology is clearly not just marketing hype. While they cost more upfront than non.