1WS55-220 is a high performance,cost-effective 3 phase BLDC motor controller.Voltage range is from 20VDC to 50VDC 2The controller can drive the DLDC motor with HALL or without HALL 3The driver is based on advanced technology and be provided with high speed, high torque, low noise, low vibration, over current protection, overload protection, less phase line. protection, phase line short protection, alarm output, speed signal output, 4This controller can be used in small equipment, Electric Power Tools, exhaust Fan, Jade grinding machine, Vibrating motor etc 5External potentiometer control/external voltage control Features:WS55-220 is a high performance,cost-effective 3 phase BLDC motor controller.Voltage range is from 20VDC to 50VDC.The controller can drive the DLDC motor with HALL or without HALL.The driver is based on advanced technology and be provided with high speed, high torque, low noise, low vibration, over current protection, overload protection, less phase line. protection, phase line short protection, alarm output, speed signal output,positive negative rotation control etc.This controller can be used in small equipment, Electric Power Tools, exhaust Fan, Jade grinding machine, Vibrating motor etc.External potentiometer control/external voltage control.With overvoltage protection, over-current protection, locked-rotor protection.Specifications:Rated voltage: 20 to 50 VDC Rated current: 12A Current limiting: 15AMaximum speed: 20000RPM( the specific speed depends on the motor itself and load)Storage temperature: -20~+65 Usage environment: Avoid direct contact with dust, fumes and corrosive gases Temperature: 0-45 Humidity: 100M at ambient temperature and atmospheric pressure 10. Insulation strength: At normal temperature and pressure, 0.5KV, 1 minutesPackage included:1 x Motor Driver Controller with cable Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.