Features WS55-220 is a powerful, cost-effective 3-phase BLDC motor controller. The voltage range ranges from 20 VDC to 50 VDC. This controller can be used in small appliances, power tools, exhaust fans, jade grinders, vibration motors, etc. The driver is based on advanced technology and provides high speeds, high torque, low noise, low vibration, overcurrent protection, overload protection and less phase conduction. Protection, short circuit protection of phase line, alarm output, speed signal output, positive negative rotation control, etc. The controller can drive the DLDC motor with HALL or without HALL External potentiometer control/external voltage control With over-voltage protection, over-current protection, blocking protection. Specifications: Rated current: 12 A. Current limit: 15 A. Maximum speed: 20000 rpm (the specific speed depends on the motor itself and the load) Storage temperature: -20°C ~ +65°C. Use environment: avoid direct contact with dust, vapours and corrosive gases. Temperature: 0-45°C. Humidity: < 80%, no frost, frost-free Shock: 5.9 m/s 2 maximum Storage humidity: 0-95% RH Size: approx. 9.5 x 6 x 3.5 cm / 3.74 x 2.36 x 1.38 inches. Weight: 258 g Detail: 1. Two types of speed control: External potentiometer: through this potentiometer speed regulation; External voltage: external 10VDC voltage speed control; 2. Speed output PG signal: there is a pulse output with 5V revolutions between the connector and ground. The output frequency is set to P (Hz), the logarithm of the engine class is N, and the speeds are F (RPM), then the frequency of the output speeds is P=F*N/60. 3. Alarm Output ALM Signal There is a 5V alarm pulse output between the connector and ground. 4. Positive reverse function: V/R: Fiddle the toggle switch on the corresponding side, the motor steering direction can be changed. For the switch switch, the white part is top and bottom, then pinch it up and down. For the toggle switch, the white part is horizontal and the twang horizontal. 5. Start-stop (two control modes): 1. External Switch EN: Transmission by switch. 2. Side toggle switch EN: when the toggle switch, the white part is up and down, then down to start; for the toggle switch, the white part is horizontal, then select to start 6. Blocked rotor protection: when the motor stops working, turn on the power again to start. Package List