WS55-220 DC Brushless Motor Controller 20-50V Forward & Reverse

WS55-220 DC Brushless Motor Controller — Versatile Speed Governing for 20–50V Systems

The WS55-220 DC Brushless Motor Controller is a robust, feature-packed driver designed for 24V, 36V, and 48V DC brushless motors. Operating across a wide 20V to 50V input range, this controller is compatible with both Hall-sensor and sensorless (Hall-free) square-wave motors, making it an incredibly flexible solution for a wide range of applications.

Ideal for small equipment control systems, electric tools, water pumps, wind turbines, and more — this controller packs professional-grade functionality into a compact, protected housing.

Key Features

• Forward & Reverse Control (F/R): Toggle the onboard switch to instantly change motor direction with ease.
• Dual Speed Regulation Modes: Choose between external potentiometer control or external 0–10VDC voltage speed regulation (cannot be used simultaneously).
• Start / Stop Control: Supports both an external switch (EN terminal) and the onboard toggle switch for flexible integration.
• Inertial Stop: Allows the motor to coast to a stop smoothly when halted.
• Comprehensive Protection Suite: Includes undervoltage protection, current limiting (up to 15A), overcurrent protection, and locked-rotor protection for long-term reliable operation.
• Speed Signal Output (PG): Outputs a 5V speed pulse signal proportional to motor RPM — great for feedback and monitoring systems.
• Alarm Output (ALM): Outputs a 5V alarm pulse signal between the ALM port and ground when a fault is detected.
• Compatible with Hall & Hall-Free Motors: Works with both sensored and sensorless (square-wave) brushless DC motors.
• Status Indicators: Green LED = power on; Red LED = standby/fault indicator for quick diagnostics.
• Protective Shell Included: Comes pre-installed in a durable enclosure for protection in real-world environments.

Technical Specifications

Applications

The WS55-220 is widely used in:

• Electric power tools
• Small automation and control systems
• Water pumps and fluid management equipment
• Wind turbines and renewable energy systems
• DIY motor drive projects and robotics

Package Includes

• 1× WS55-220 Brushless Motor Controller (with protective shell)

Important Notes

• Due to lighting and screen differences, the product's color may appear slightly different from photos.
• Please allow ±1mm–10mm measurement variance due to manual measurement.
• The two speed regulation modes (potentiometer and external voltage) cannot be used simultaneously.
• Only one start/stop switch (external EN or onboard toggle) can be active at a time — disable one before enabling the other.

Helpful Resources

For guidance on electrical safety standards and best practices when working with motor drive systems, refer to OSHA's Electrical Safety Guidelines.

Frequently Asked Questions

Q: Is the WS55-220 brushless motor controller compatible with sensorless motors?

A: Yes! The WS55-220 is compatible with both Hall-sensor brushless DC motors and sensorless (Hall-free) square-wave brushless motors, giving you flexibility across a wide range of motor types.

Q: What voltage systems does the WS55-220 support?

A: The WS55-220 supports an input voltage range of 20V to 50V DC, making it fully compatible with common 24V, 36V, and 48V brushless motor systems.

Q: Can I use both the external potentiometer and external voltage speed regulation at the same time?

A: No — only one speed regulation mode can be active at a time. You must select either the external potentiometer or the external 10VDC voltage input for speed control, not both simultaneously.

Q: What protections does the WS55-220 motor controller include?

A: The controller features undervoltage protection, current limiting (up to 15A), overcurrent protection, and locked-rotor protection to safeguard both the controller and your motor during operation.