High-safety electric drill controller

The utility model discloses a high safety type electric drill controller including a MCU control module, a power supply module, a back electromotive force module and a power-off protection module, the MCU control module is used for rapid operation control and smooth operation of a motor, the power supply module is used for stable output power supply, and the back electromotive force module is used for controlling the back electromotive force module and the power-off protection module. The counter electromotive force module is used for detecting counter electromotive force voltages of U, V and W phases, comparing the counter electromotive force voltages with a midpoint Nbemf voltage and finding out a zero crossing point event of induced electromotive force of each phase to obtain a commutation point, and the power-off protection module is used for enabling the single-chip microcomputer to enter protection and enable the controller to stop when the single-chip microcomputer detects an instantaneous pulse signal