AC 50-220V 2000W 25A Motor Speed Controller TYPE A
Share :
The AC 50-220V 2000W 25A Motor Speed Controller is a versatile and high-power electronic module used for controlling the power supplied to various AC loads. It is built around a Silicon Controlled Rectifier (SCR) or Triac, which uses a technique called Phase-Angle Firing Control to regulate the output voltage.
This module does not convert the AC voltage to DC; rather, it chops up the AC sine wave to reduce the effective voltage and power delivered to the load.
SCR/Triac: The Silicon Controlled Rectifier (SCR) or Triac is a solid-state electronic switch.
Phase Control: The internal circuit, controlled by the adjustment knob (potentiometer), determines when during each half-cycle of the AC waveform the SCR/Triac is allowed to turn ON.
Power Regulation:
Low Setting: The SCR/Triac is triggered late in the cycle, allowing only a small part of the AC wave to pass through. This results in low effective voltage and low power.
High Setting: The SCR/Triac is triggered early in the cycle, allowing most of the AC wave to pass through. This results in high effective voltage and high power (up to near 220V).
⚙️ Key Specifications and Ratings
| Parameter | Value | Notes |
| Input Voltage | AC 220V (Nominal) | Designed for 220V/230V AC mains; some can work on 110V but check the specific model. |
| Output Voltage Range | AC 50V to 220V | The adjustable range of the regulated output. |
| Maximum Power | 2000W | The maximum power rating for resistive loads (like heaters/lights). |
| Maximum Current | 25A | The peak current the internal SCR/Triac can handle (though continuous current is often lower). |
| Controlling Element | SCR / Triac | Silicon Controlled Rectifier / Triode for Alternating Current. |
This type of regulator is best suited for resistive loads and simple universal AC motors (brushed motors), but it is generally not suitable for highly sensitive electronics or induction motors.
| Application Type | Examples | Notes |
| LED Dimmers | Dimming LED or incandescent lights (will not work well with all LED types). | Works perfectly for old-style incandescent and halogen bulbs. |
| Heating Elements | Electric stove/cooktop elements, water heaters, electric iron, soldering iron temperature control. | Excellent for resistive loads due to stable regulation. |
| Motor Speed Control | Small AC power tools (drills, angle grinders), ceiling/pedestal fans, vacuum cleaners. | Caution: For inductive loads (motors/fans), the regulator's max power should be derated (e.g., to approx 1000W - 1200W) to prevent overheating and failure. Do not use with AC induction motors or shaded-pole motors. |
| Voltage Regulation | General purpose AC voltage adjustment for non-critical loads. |
Load Type: SCR-based controllers are not suitable for all types of loads, especially modern switched-mode power supplies or sensitive electronic equipment, as the chopped sine wave output can cause damage or instability.
Voltage: Ensure the device is rated for your local mains voltage (220V or 110V) before connecting it. The nameplate suggests a 220V input.
Safety: The module operates at mains voltage (220V AC). Extreme caution must be taken during wiring and operation to avoid electric shock.