BLDC 3 Phase Brushless No Hall Motor Drive Board 12-75V 20A 1500W Motor Control Board PWM Governor with Revolution Meter BLDC 3 Phase Brushless No Hall Motor Drive Board 12-75V 20A 1500W Motor Control Board PWM Governor with Revolution Meter Feature: This product is a non-inductive BLDC motor driver module developed for SNR8503M drive chip, the chip integrated non-inductive motor driver special circuit, with simple peripheral circuit, complete functions, small body, simple debugging, high driving efficiency, flexible application, wide application and other characteristics. Motor drives the bottom layer. Non-inductive boot bottom layer. Reverse electromotive force commutation layer. Phase compensation algorithm. Velocity closed-loop PID algorithm. Current limiting PID algorithm. Downwind start-up algorithm. Reverse switch, stop brake, potentiometer (PWM) speed regulation, LED motor status indication. Motor protection: MOS power-on self-test, MOS over-temperature protection, locked-rotor protection, over current protection, over and under voltage protection. Features: Onboard LED indicator for standby, working, error and other states. Onboard potentiometer (0.5~5V),PWM speed control interface (frequency 1~20KHz), duty cycle 10~100%. Onboard FG speed feedback interface, calculation speed RPM= FG frequency Hz*60/ pole number. Onboard CW/CCW steering interface, suspended for clockwise CW, short-circuited GND for counterclockwise CCW steering. Onboard UART serial port. Users can control the module through the serial port protocol. Onboard burning interface for updating the burning program. Applications: Pumps, medical equipment, all kinds of compressors, all kinds of fans/fans, electric screwdrivers, electric curtains, automatic doors, hydraulic oil pumps, air pumps, refrigerator brushless compressor, lawn mowers, sprayer, underwater thrusters, etc. Specifications: Operating voltage: 12-75V Continuous operation (current limit):20A Maximum current:50A Speed range:< 180,000 RPM Drive carrier frequency:16KHz, support modification Drive mode: upper arm PWM, lower arm full open commutation Noninductive observation: back electromotive force observation Potentiometer speed regulation:0.5~5V PWM speed regulation: frequency 1~20KHz, duty cycle 10~100% FG Speed feedback: RPM=FG Frequency Hz*60/pole number Speed control mode: Open loop control by default Speed closed loop: Supported Current closed loop: Supported Downwind startup: Supported UART Serial port control: Supported CW/CCW Steering: Supported LED Status indicator: Supported Stop brake: Support Program Update: Supported MOS power-on self-test: Supported MOS overtemperature protection: temperature >95 protection (