AC Motor Variable Speed Controller and Fan Regulator for DIY Projects, Bench Testing, and Industrial Use, 4000W, 120-220V Adjustable Voltage, 15A, Precise, Smooth Speed Control for Fans and Motors

4000W AC Motor Speed Controller (Single Unit)
✔️ 4000W max, 120-220V input, 0-220V adjustable output, 9A rated

This variable speed controller is built for bench testing, DIY projects, and industrial use. It provides precise control over fan and motor speed by adjusting voltage, with a max 4000W for resistive loads and 1500W for inductive loads. The design uses ceramic-insulated power electronics for reliable operation across 120-220V input and 0-220V output, and a bi-directional SCR for smooth speed changes.

✅ Max power: 4000W (resistive) / 1500W (inductive)
✅ Input/output: 120-220V AC input, 0-220V adjustable output
✅ Current: 9A continuous, 18A peak
✅ Control: bi-directional SCR and rheostat for smooth speed adjustment
✅ Load display: actual voltage shown under load
✅ Applications: bench testing, DIY projects, and industrial use

💡 What is a motor speed controller used for in bench testing and DIY projects?

A handy tool for hands-on learning and prototyping motor-driven systems. - Allows precise voltage control to drive AC motors and fans - Lets you ramp voltage gradually to reduce wear during tests - Great for labs, hobbyists, and small industrial testing