Why are inverters called differently in different fields and contexts?

The reason why inverters are referred to by different names in various fields and contexts is primarily due to differences in functionality, application scenarios, and historical backgrounds. Here are some reasons:

Functionality and Application Scenarios

VFD (Variable Frequency Drive): This is the most common term for inverters, emphasizing their ability to regulate motor speed by altering the frequency of the power supply to the motor. VFDs are widely used in industrial automation, such as controlling the speed of pumps, fans, and conveyor belts, to improve energy efficiency and precise control.
Frequency Converters: This term is more generic, focusing on the function of converting frequencies, not necessarily for driving motors. It is used in applications where different frequency power supplies are needed, such as adapting imported equipment, precision measurement, and control systems.
Inverter: Typically, an inverter refers to a device that converts direct current (DC) into alternating current (AC). However, in some contexts, inverters are also called inverters because they include an inverter stage that performs the DC-AC conversion.
AC Drive (Alternating Current Drive): This term emphasizes the function of driving AC motors. In industrial settings, AC Drive is often used to describe devices that control the speed of AC motors.

Historical and Terminological Evolution

Terminology Development: As technology has evolved and applications have expanded, different terms have been adopted and used. For example, the term "inverter" initially described devices that convert DC to AC, but with the proliferation of VFDs, the term "inverter" is also used to describe them.
Influence of Professional Fields: In different professional areas, people use terms based on the main functions and application habits. For instance, in the field of power electronics, "inverter" is more commonly used to describe DC-AC conversion devices, while in industrial automation, terms like "VFD" and "AC Drive" are more prevalent.

Language and Cultural Differences

Language Habits: Different countries and regions may use different terms for the same device. For example, in some non-English-speaking countries, inverters are referred to as inverters because their main power components also involve DC-AC conversion.
Industry Standards: Different industries may have different standards and customary terms, leading to the use of different names for the same device in various industries.

These factors collectively contribute to the different names used for inverters in various fields and contexts, reflecting their diverse functionalities and broad range of applications.