{"product_id":"ws55-220-dc-brushless-motor-controller-20-50v-forward-reverse","title":"WS55-220 DC Brushless Motor Controller 20-50V Forward \u0026 Reverse","description":"\n\u003ch2\u003eWS55-220 DC Brushless Motor Controller — Versatile Speed Governing for 20–50V Systems\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eWS55-220 DC Brushless Motor Controller\u003c\/strong\u003e is a robust, feature-packed driver designed for 24V, 36V, and 48V DC brushless motors. Operating across a wide \u003cstrong\u003e20V to 50V input range\u003c\/strong\u003e, this controller is compatible with both \u003cstrong\u003eHall-sensor and sensorless (Hall-free) square-wave motors\u003c\/strong\u003e, making it an incredibly flexible solution for a wide range of applications.\u003c\/p\u003e\n\u003cp\u003eIdeal for small equipment control systems, electric tools, water pumps, wind turbines, and more — this controller packs professional-grade functionality into a compact, protected housing.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eForward \u0026amp; Reverse Control (F\/R):\u003c\/strong\u003e Toggle the onboard switch to instantly change motor direction with ease.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Speed Regulation Modes:\u003c\/strong\u003e Choose between external potentiometer control or external 0–10VDC voltage speed regulation (cannot be used simultaneously).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStart \/ Stop Control:\u003c\/strong\u003e Supports both an external switch (EN terminal) and the onboard toggle switch for flexible integration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInertial Stop:\u003c\/strong\u003e Allows the motor to coast to a stop smoothly when halted.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComprehensive Protection Suite:\u003c\/strong\u003e Includes undervoltage protection, current limiting (up to 15A), overcurrent protection, and locked-rotor protection for long-term reliable operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpeed Signal Output (PG):\u003c\/strong\u003e Outputs a 5V speed pulse signal proportional to motor RPM — great for feedback and monitoring systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAlarm Output (ALM):\u003c\/strong\u003e Outputs a 5V alarm pulse signal between the ALM port and ground when a fault is detected.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible with Hall \u0026amp; Hall-Free Motors:\u003c\/strong\u003e Works with both sensored and sensorless (square-wave) brushless DC motors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStatus Indicators:\u003c\/strong\u003e Green LED = power on; Red LED = standby\/fault indicator for quick diagnostics.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProtective Shell Included:\u003c\/strong\u003e Comes pre-installed in a durable enclosure for protection in real-world environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWS55-220\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20–50V DC (24V \/ 36V \/ 48V compatible)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCurrent Limit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeed Regulation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExternal Potentiometer or External 10VDC Voltage\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeed Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5V PG pulse signal (P = F × N \/ 60)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlarm Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5V ALM pulse signal\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMotor Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSquare-wave brushless DC (with or without Hall sensors)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e96mm × 67mm × 37mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eThe WS55-220 is widely used in:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eElectric power tools\u003c\/li\u003e\n  \u003cli\u003eSmall automation and control systems\u003c\/li\u003e\n  \u003cli\u003eWater pumps and fluid management equipment\u003c\/li\u003e\n  \u003cli\u003eWind turbines and renewable energy systems\u003c\/li\u003e\n  \u003cli\u003eDIY motor drive projects and robotics\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Includes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× WS55-220 Brushless Motor Controller (with protective shell)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDue to lighting and screen differences, the product's color may appear slightly different from photos.\u003c\/li\u003e\n  \u003cli\u003ePlease allow ±1mm–10mm measurement variance due to manual measurement.\u003c\/li\u003e\n  \u003cli\u003eThe two speed regulation modes (potentiometer and external voltage) cannot be used simultaneously.\u003c\/li\u003e\n  \u003cli\u003eOnly one start\/stop switch (external EN or onboard toggle) can be active at a time — disable one before enabling the other.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHelpful Resources\u003c\/h3\u003e\n\u003cp\u003eFor guidance on electrical safety standards and best practices when working with motor drive systems, refer to \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA's Electrical Safety Guidelines\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Is the WS55-220 brushless motor controller compatible with sensorless motors?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What voltage systems does the WS55-220 support?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I use both the external potentiometer and external voltage speed regulation at the same time?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What protections does the WS55-220 motor controller include?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is the WS55-220 brushless motor controller compatible with sensorless motors?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! 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