Features WS55-220 is a powerful, cost-effective 3-phase BLDC motor controller. The voltage range ranges from 20 VDC to 50 VDC The controller can drive the DLDC motor with Hall or without HALL The driver is based on advanced technology and is equipped with high speed, high torque, low noise level, low vibration, overcurrent protection, overload protection and less phase line. Protection, phase line short circuit protection, alarm output, speed signal output, This controller can be used in small appliances, power tools, exhaust fans, jade grinders, vibration motors, etc. Can be used External potentiometer control/external voltage control Technical data: Rated voltage: 20 to 50 VDC. Rated current: 12 A. Current limit: 15 A. Maximum RPM: 20000 rpm (the specific speed depends on the motor itself and the load) Storage temperature: -20 ℃ ~ + 65 ℃. Use environment: avoid direct contact with dust, fumes and corrosive gases Temperature: 0-45℃ Humidity: Package List