DC Motor Speed Controller 220V AC to 90V DC Regulator
DC Motor Speed Controller 220V AC to 90V DC Regulator
DC Motor Speed Controller – 220V AC Input / 90V DC Output
Take precise command of your DC motor with this compact, easy-to-install speed controller. Designed for workshop machinery, industrial equipment, and DIY projects, this regulator converts 220V AC input to a regulated 90V DC output, giving you smooth, stepless speed control at your fingertips. Made in Mainland China.
Key Features
- Wide Speed Adjustment Range: Delivers stable, high-efficiency performance across the full speed spectrum — from near-zero to full rated speed.
- 220V AC In / 90V DC Out: Standard voltage configuration allows direct motor start-up whenever DC voltage is present — no additional converter needed.
- Reversible Motor Direction: Easily switch between clockwise (CW) and counter-clockwise (CCW) rotation by swapping the wiring at the M+ and M− terminals.
- Broad Motor Compatibility: Suited for DC motors rated at 50W, 100W, 120W, 200W, 300W, 400W, and more — highly flexible for a variety of applications.
- Built-In Overcurrent Protection: Features an integrated safety fuse for overcurrent and short-circuit protection, keeping your equipment safe.
- Emergency Stop Function: Short the P1 and P2 terminals to instantly stop motor operation — a critical safety feature for industrial use.
- Compact & Lightweight: Panel screw installation in minutes; fits neatly into a standard control cabinet or enclosure.
Specifications
| Item Type | DC Motor Speed Controller |
| Input Voltage | 220V AC |
| Output Voltage | 90V DC |
| Overall Dimensions | Approx. 100 × 60 × 114 mm (3.94 × 2.36 × 4.49 in) |
| Panel Opening Size | Approx. 81 × 53 mm (3.19 × 2.09 in) |
| Installation Method | Panel Screw Installation |
| Country of Origin | Mainland China |
How to Use
- Before powering on, turn the external speed knob to 0 to prevent a large instantaneous current surge that could damage the controller.
- Wiring terminals: The AC terminals accept the AC input voltage. M+ and M− connect to the DC motor output. P1 and P2 are the emergency stop terminals — shorting them halts the motor immediately.
- Fuse replacement: If the built-in safety fuse blows due to overcurrent or a short circuit, replace it with a fuse of the identical specification. Note that the panel action switch controls motor start/stop only — it does not disconnect power supply.
Package Contents
- 1 × DC Motor Speed Controller
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Frequently Asked Questions
Q: What types of DC motors are compatible with this 220V AC to 90V DC speed controller?
A: This DC motor speed controller is compatible with a wide range of DC motors, including those rated at 50W, 100W, 120W, 200W, 300W, and 400W. As long as your motor operates on 90V DC, this controller is a strong match for workshop tools, small machinery, and DIY automation projects.
Q: How do I reverse the rotation direction of my motor using this controller?
A: To reverse the motor's rotation from clockwise (CW) to counter-clockwise (CCW) — or vice versa — simply swap the wiring connections at the M+ and M− output terminals on the rear of the controller. No additional hardware is required.
Q: What should I do if the built-in fuse blows?
A: The controller includes a built-in safety fuse tube that protects against overcurrent or short-circuit events. If the fuse blows, turn off and disconnect power, then replace the fuse with one of the exact same specification. Using a different-rated fuse may compromise safety and damage the unit.
Q: How is this DC motor speed controller installed?
A: Installation is straightforward — the controller uses a panel screw mounting method. Cut or use an existing panel opening of approximately 81 × 53 mm, slide the unit in, and secure it with screws. The compact 100 × 60 × 114 mm body fits neatly into most control enclosures or project boxes.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.