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ACDC1800W Core Board

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Table of Contents

Introduction
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  The ACDC1800W Core Board is a high-performance embedded solution based on the STM32F105RxT6 microcontroller, integrated with a Bluetooth wireless communication module. Designed specifically for IoT applications, the system features AC/DC power conversion control, intelligent fan thermal management, LED status indication, CAN communication interfaces, and comprehensive power/load protection monitoring. The software architecture implements precise GPIO control, ADC sampling, and PWM output logic tailored to the hardware schematic.

Hardware Showcase
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STM32 Core Board
💡 Features high-density component placement, integrating multi-phase power management and high-speed signal processing units to demonstrate extreme PCB space utilization.
STM32 Core Board Back
💡 Onboard high-performance Bluetooth module supports low-power wireless debugging and data transparent transmission, empowering the ACDC1800W system with flexible IoT connectivity.

Software Showcase
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STM32 Core Board Software Project
💡 Overview of the software project engineering structure.

Functional Specifications
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🔋 Digital Power Flow Control
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  • Dynamic Voltage/Current Regulation: Supports real-time command execution from the host. The internal PID algorithm adjusts PWM output to achieve stepless voltage regulation and precise constant current limiting.
  • Relay Timing Logic (Built-in Strict Power-On/Off State Machine):
    • Pre-charge: Pre-charging detection.
    • Main-Connect: Main circuit relay engagement.
    • Aux-Control: Auxiliary buck board linkage control.
  • Battery Handshake Protocol: Automatically executes battery presence detection and voltage verification before enabling output to prevent damage from no-load or reverse connection.

❄️ Intelligent Thermal Management System
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  • Adaptive Fan Curve: Abandoning traditional gear-based control, the system uses continuous PWM speed regulation. The software dynamically fits the optimal speed curve based on NTC temperature sampling, balancing silence and cooling efficiency.
  • Fan Fault Diagnosis: Real-time monitoring of the fan FG signal (speed feedback). Upon detecting a fan stall or disconnection, the system immediately triggers derating or shutdown protection and reports fault codes.

👁️ Immersive Status Feedback
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  • RGB/LED Optical Language System (Intuitively conveying device “emotions” through combinations of frequency and color):
    • 🟢 Green (Solid): Energy Full (Charged).
    • 🔴 Red (2Hz Flash): Energy Injecting (Charging).
    • 🟡 Yellow (Alert): System Anomaly or Fault Warning.

🛡️ Multi-Dimensional Security Defense Matrix
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  • Hardware-Level Fast Protection: Monitors short-circuit protection pin levels with microsecond-level response to cut off output.
  • Software Over-Temperature/Over-Voltage Protection: Dual ADC sampling verification to prevent single-point failures.
  • Communication Watchdog: CAN communication timeout detection to prevent loss of control.

📡 Data Acquisition & Safety Protection
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  • Multi-channel ADC Sampling: Real-time acquisition of critical analog quantities, including:
  • Input/Output Voltage: Monitoring grid input and converted DC output.
  • Output Current: Acquiring precise current values via sampling resistors and amplifier circuits.
  • Temperature Monitoring: Collecting NTC thermistor data for over-temperature protection.
  • Hardware Protection Linkage: Monitoring short-circuit and over-voltage protection signals; the software responds immediately to cut off output once hardware-level anomalies are triggered.