Motor Control Circuit for Cordless Power Tool

Motor driver for cordless power tools using low loss element TPH1R204PB within small package. The motor speed is controlled by MCU. Description of circuit design method.

Circuit diagram of motor control circuit for cordless power tool.

特性

  • 2 types of drive methods, square wave drive and sine wave drive, are switchable
  • It can control the revolving speed of motor optimally by MCU
  • TPH1R204PB, that is low power loss and low spike voltage, is used for output elements.
  • 3 shunt type current detector is mounted for PCB, and it can also support sensor-less control.
  • Protecting function from over current and etc. is mounted.
  • Standby power reduction circuit operate after a certain period that the motor is not rotating.
  • It consists of 2 PCBs of a main board and interface board, and contributes to the miniaturization of a power tool.

說明

  • Motor driver for cordless power tools using low loss element TPH1R204PB within small package. The motor speed is controlled by MCU. Description of circuit design method.
Wave form of motor control circuit for cordless power tool.
Wave form

設計文件

供設計人員使用的材料，例如電路操作概述和設計注意事項的解釋。請點擊每個選項以查看內容。

設計數據

提供可載入到EDA工具中的電路資料、PCB佈局資料以及PCB製造中使用的資料。來自多個工具供應商的可用格式。您可以使用喜歡的工具來自由的編輯它。

*1:實際PCB在CR5000BD上設計。其他文件由CR5000BD文件生成。

*2:數據在CR5000BD上生成。

使用東芝項目/產品

器件型號 器件目錄 使用部位・數量 說明
Small-signal Schottky barrier diode Power section・2 40 V/1.5 A Schottky Barrier Diode, SOD-323HE(US2H)
Switching diode Input voltage detector・1 100 V/0.25 A Switching diode, SOD-323(USC)
Power transistor for high-speed switching applications Standby power reduction circuit・1 PNP Bipolar Transistor, -50 V, -2 A, TSM
Power transistor for high-speed switching applications Standby power reduction circuit・1 NPN Bipolar Transistor, 120 V, 1.0 A, TSM
Transistor for low frequency small-signal amplification Standby power reduction circuit・1 NPN Bipolar Transistor, 50 V, 0.2 A, SOT-23(SOT23)
Power MOSFET (N-ch single 30V<VDSS≤60V) Output section・6 N-ch MOSFET, 40 V, 0.0012 Ω@10V, SOP Advance, U-MOSⅨ-H
Comparator (CMOS) Motor current detector・2 Dual Comparator (CMOS), 7 V, +/-3.5 V, SOT-765(US8)

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