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Motor control circuit for cordless power tools

 
Overview
• The motor driver IC of the cordless power tool uses a small packaged low-power device TPH1R204PB. The motor speed is controlled by MCU. Description of circuit design methods.
Features

• Two drive methods (square wave drive and sine wave drive) can be switched
• Optimal control of motor speed can be achieved through MCU
• TPH1R204PB with low power consumption and low peak voltage is used for output devices
• Printed circuit board mounted 3-way parallel current detector, which can also support sensorless control
• Has functions such as overcurrent protection
• The backup power reduction circuit operates after the motor stops rotating for a certain period of time
• It consists of 2 PCBs of the main board and the interface board, which helps Miniaturization of power tools

Blockdiagram

 
 
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Update:2025-05-11 15:47:03

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