This solution is built on high-performance Arm® Cortex®-M3 and Cortex®-M4 series chips and uses a sensorless FOC control strategy based on high-frequency injection, so the motor delivers maximum torque at any speed — including startup and low-speed operation. The FOC sinusoidal algorithm also makes the motor more energy efficient, extending the runtime of battery-powered tools.
Solution Overview
Several Arm® Cortex®-M3 and Arm® Cortex®-M4 core main controllers are available; a high-frequency injection algorithm based on FOC drives the motor through PWM and ADC.
Recommended MCU
- NXP KV3x series: Arm® Cortex®-M4 core, motor-dedicated MCU family; up to 120MHz core frequency; 64KB~512KB Flash / 16KB~96KB RAM; 12bit ADC, 16bit motor-dedicated PWM; packages HVQFN32/LQFP48/QFP64/LQFP100
- GD GD32F1xx series: Arm® Cortex®-M3 core; up to 108MHz core frequency; 16KB~3MB Flash / 6KB~96KB RAM; 12bit ADC, 16bit PWM; packages QFN36/LQFP48/ LQFP64/ LQFP100/ LQFP144
- HDSC HC32F4xx series: Arm® Cortex®-M4F core; up to 168MHz core frequency; 512KB Flash / 192KB RAM; 12bit ADC, 16bit PWM; packages QFN48/LQFP48/ QFN60/ LQFP64/ LQFP100
Core Components
- MCU: KV3x (NXP)
- MCU: GD32F1xx (GD)
- MCU: HC32F4xx (HDSC)
- DC/DC: MPS, full part number available on request
- MOSFET: Nexperia, full part number available on request
- Op-Amp: 3Peak, full part number available on request
Functional Block Diagram
