Compact Excessive-Present BLDC Motor Management Reference Design

It’s a ready-to-use, versatile resolution for purposes corresponding to electrical automobiles, drones, and industrial automation, the place excessive present output and compact design are important. 

The appearance of round and intensely compact motor management reference designs for high-current brushless motors marks a major development in fashionable engineering. These designs are essential for numerous purposes, from electrical automobiles and drones to industrial automation and robotics, the place effectivity, precision, and house optimization are paramount. By integrating high-current capabilities right into a compact type issue, these modern designs not solely improve efficiency but in addition scale back the general footprint, enabling extra versatile and environment friendly use of house. The round structure facilitates higher thermal administration and electromagnetic compatibility, making certain dependable and sturdy operation even below demanding circumstances. As industries more and more pivot in the direction of extra sustainable and environment friendly applied sciences, the significance of such cutting-edge motor management options can’t be overstated.

The EVLDRIVE101-HPD by ST Mircroelectronics is a extremely compact three-phase inverter designed for brushless motors. It integrates the STDRIVE101 gate driver and the STM32G071KB microcontroller. This mixture affords versatile management strategies, together with Discipline-Oriented Management (FOC) and trapezoidal management, with sensors and sensor-less choices. It’s notably suited to battery-powered three-phase purposes demanding excessive output currents. Working inside a voltage vary of 18 V to 52 V, the inverter is adaptable to varied battery configurations. The STDRIVE101, a triple half-bridge gate driver, ensures environment friendly and dependable motor management. Central to the system is the STM32G071KB microcontroller, primarily based on the Arm Cortex-M0+ structure, that includes 36 Kbytes of SRAM and 128 Kbytes of Flash reminiscence. This gives ample sources for complicated motor management algorithms and application-specific firmware.

The ability stage utilises STL220N6F7 MOSFETs, recognized for his or her low Rds(on) of 1.2 mΩ and excessive present dealing with capability. This configuration permits the inverter to help output currents as much as 15 Arms, translating to an influence output of as much as 750 W, preferrred for high-demand purposes. The compact design has a round footprint of simply 50 mm in diameter, facilitating straightforward integration into numerous mechanical setups. A quick power-on circuit that connects and disconnects the battery considerably extends battery life by minimising idle energy consumption. An exterior turn-on/off set off gives a low-power standby mode, which is essential for battery-operated methods. The board has an enter connector for Corridor-effect sensors and encoders, enhancing its flexibility in several motor purposes. Again-EMF (BEMF) sensing circuitry and a present limiter with an adjustable reference guarantee secure and environment friendly motor operation below various hundreds. 

Safety options embody thermal shutdown to forestall overheating, Undervoltage lockout (UVLO) to forestall operation below unsafe voltage circumstances, and overcurrent and reverse bias safety on the facility stage outputs. Dependable and redundant overcurrent safety is achieved by means of VDS monitoring. The board options an STDC14 debug connector and helps direct firmware updates by way of UART, simplifying improvement and upkeep processes.Its sturdy options guarantee dependable efficiency and longevity, making it a super alternative for demanding brushless motor purposes.

ST Microelectronics has examined this reference design. It comes with a invoice of supplies (BOM), schematics, meeting drawing, printed circuit board (PCB) structure, and extra. The corporate’s web site has extra knowledge concerning the reference design. To learn extra about this reference design, click on right here.