Remote speed regulation device of direct current brushless motor

A remote speed regulation device of a direct current brushless motor comprises a rectification control unit and a speed regulation unit, wherein the rectification control unit comprises a transformer, a control power supply module, a controlled rectification module, a zero-cross detection module, a singlechip control module, a trigger control module and a speed given module and is used for inputting a single-phase 220V alternating current power supply, outputting a controlled rectification voltage with an output voltage valid value less than 220V, and sending a speed control signal composed of a guide wave and a data wave in the controlled rectification voltage; and the speed regulation unit comprises a regulation power supply module, a waveform sampling module, a singlechip regulation module and a motor driving module and is used for controlling the speed of the direct current brushless motor according to the speed control signal in the controlled rectification voltage. In the device, a remote controller is not needed, a control line is unnecessarily and independently laid, a single-phase power line is directly used for transmitting the speed control signal, and remote control and regulation on the speed of the direct current brushless motor can be achieved.