关键词: 电动工具控制器, 无刷直流电机, 国产MCU, 无位置传感器控制

Abstract: In response to the increasingly high demand for brushless electric tool controllers, combined with the current mainstream design requirements, a new design scheme based on the AiP8F7232 microcontroller has been proposed. In the design of the hardware architecture, this scheme fully combines the characteristics of the special peripherals for motors of the AiP8F7232 microcontroller, being concise, efficient and highly integrated. For the software architecture, considering the application features of electric tools, motor drive control and controller protection strategies are designed, featuring a high degree of functional integrity. The experimental results indicate that the designed controller meets the requirements of brushless electric tools and ensures that the motor starts without reverse rotation, makes closed-loop acceleration time less than 100 ms. Additionally, it operates smoothly at medium speeds and maintains stable performance when delivering full 800W power at high speeds.

Key words: electric tool controller, Brushless DC motor, domestic MCU, position sensorless control