Motor Inverters (VFD / VSD)

Motor inverters, also known as VFD (Variable Frequency Drive) or VSD (Variable Speed Drive), are drive solutions designed to control speed, torque, and the overall dynamic behavior of AC motors. In simple terms, a VFD adjusts the motor’s frequency and voltage, allowing the machine to match motion and performance to real process needs.

Motor Inverters (VFD/VSD) for industrial automation

What they are used for

A variable frequency drive (VFD) enables accurate motor speed control and helps optimize machine operation based on load conditions and duty cycle. It is a standard choice in industrial automation whenever consistent control and repeatable performance are required.

Typical applications

• conveyors and material handling systems
• industrial machines and automated production lines
• pumps, fans, and compressors
• controlled start/stop ramps and current limiting for smoother operation

Operational benefits

• precise speed control (stable setpoint and improved process repeatability)
• reduced mechanical stress thanks to controlled acceleration and deceleration
• better energy efficiency in variable-load applications (e.g., pumps/fans)
• protection and diagnostics to reduce downtime and support maintenance

Single-phase and three-phase: how to choose

In this category you can find industrial motor drives in:

• single-phase versions, when 230 V single-phase supply is available
• three-phase versions, for machines and plants with three-phase supply

For a correct selection, always consider available supply, motor power, load type (pump/fan/conveyor), duty cycle, and control requirements.

Functional safety: STO

In many machine applications, functional safety features are essential. STO (Safe Torque Off) safely prevents the drive from generating torque, supporting safe stop functions and safety-related machine design requirements.

Available range at Elcoteam

Initially, we focus on Unitronics inverters (the UMI-B1 series) for industrial applications, with an emphasis on availability, supply continuity, and technical-commercial support. The range is designed to expand over time with new solutions and variants, while keeping the category structure clear and useful for those searching for “motor inverter”, “variable speed drive”, “AC drive”, or “VFD”.

Support for selection

Not sure whether you need single-phase vs three-phase, the right power rating, the best setup for your application, or specific safety requirements? Contact us—we’ll help you identify the most suitable configuration for your machine or plant.