VEVOR AT1-7500X 10HP Variable Frequency Drive: specs and who it suits

The VEVOR AT1-7500X is a variable frequency drive (VFD) rated at 7.5kW, or 10HP. It takes single-phase 220-240V power and produces three-phase 220-240V output to run and control a three-phase AC motor. For workshops without three-phase supply, it is a way to run such a motor and to change its speed.

What a VFD does

A three-phase AC motor's speed depends on the frequency of its supply. A VFD converts the incoming power and recreates it at an adjustable frequency, so you can slow the motor down, speed it up and ramp it gently instead of switching it straight on. VEVOR lists an output frequency range of 0 to 400Hz from a 50/60Hz input.

Soft starts and steadier control

Starting a large motor directly can cause a sharp surge of current. A drive that ramps up the frequency avoids this, and the same applies in reverse for a soft stop. VEVOR says the drive provides soft start and stop, steady motor control and energy efficiency. Running a motor slower when full speed isn't needed typically uses less power.

The numbers in plain terms

• 7.5kW / 10HP: the motor size the drive is built for.
• 34A: the rated output current.
• Single-phase 220-240V in, three-phase 220-240V out: the motor must be rated for the output voltage.

VEVOR also notes that for heavier motor loads, a higher-powered drive is the better choice. Sizing generally means matching the drive to the motor's rated current, not only its horsepower.

Protection and build

VEVOR describes a 10-layer protection system covering overcurrent, overload, overvoltage, phase loss and more, and a triple-proof paint on the circuit board. Cooling comes from a fan with a multi-sided, multi-hole housing for ventilation, which VEVOR says keeps noise low during long runs.

Controls and setup

The drive has a control panel with a display and a frequency knob. The panel detaches and connects through a 7.9-inch (about 20 cm) cable, so it can be placed where you can reach it. VEVOR says a detailed guide explains the parameter adjustments. Wiring a drive involves high voltages, so follow the manual and local electrical codes, and use a qualified electrician if you aren't certain.

Applications and limits

VEVOR lists compressors, lathes, fans and milling machines as typical uses. The listing notes that the drive does not support external braking resistors, which matters for loads with high inertia that need to stop quickly. It is about 4.6 x 8.7 x 5.6 inches (12 x 22 x 14 cm) and weighs 5.7 lb (about 2.6 kg).

Who it suits

Home workshop owners and small workshops who have a three-phase motor but only single-phase power, or who want speed control on a lathe, mill or fan.

What to check before you buy

• Motor specs: voltage, current and horsepower should match the drive's.
• Supply: confirm your circuit can feed a 10HP-class drive, which is a substantial load.
• Braking needs: the drive does not support external braking resistors.
• Mounting space: leave clearance for airflow and the cooling fan.
• Wiring and settings: check the manual for parameters and keep to local codes.

The short version

• A 10HP (7.5kW), 34A VFD, model AT1-7500X.
• Single-phase 220-240V input, three-phase 220-240V output, 0-400Hz.
• Soft start and stop, 10-layer protection and a detachable control panel.
• No external braking resistor support.
• 5.7 lb, with a cooling fan.

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