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Power tool evaluation boards from ST and Wurth – Jingtongxin Technology

Power tool evaluation boards from ST and Wurth

Würth Elektronik and STMicroelectronics are jointly developing a power tool circuit for brushless DC motors.
ST provided the STM32G4 (Cortex-M4) MCU, STDRIVE101 gate drivers and 6 STL220N6F7 MOSFETs etc., then Wirth provided the LHMI power inductors and CBF ferrite EMI suppression beads.

The MCU software was developed using ST’s X-CUBE-MCSDK motor control development kit.
Specifications include operating current up to 20A from 12 to 24Vdc (36V for 8S cells after resistance change) output RMS current up to 20 AMP.

With the default sensorless three-shunt vector (field oriented control) algorithm, sensor or sensorless operation is possible, torque or speed modes can be used, and the drive dynamics can be adjusted together with other parameters such as switching frequency.

Protections include overcurrent, undervoltage lockout, and thermal shutdown.

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