Smart BLDC ceiling fan

Secure, efficient and connected Solution for constant air delivery

This Proof of Concept (PoC) provides for a high efficiency, high torque, low noise, and smooth start solution. Efficiency is key for this application; thus, built-in self-align dead time with chip design technology offers lower thermal losses and reduces power loss.

In this design, a microcontroller (MCU) + pre-driver in a single chip reduces component count* and board size. A proprietary sensorless algorithm reduces dependency on external components.

This smart solution consists of core ceiling fan functions like dual rotation, natural breeze, LED lighting, and temperature and humidity sensor, with IoT features supporting wireless protocol (Wi-Fi) for control using the Android OS for smart devices.

Benefits

• Rotor position sensing technology (MRI – Magnetic Rotor Position Identification) for low-speed rotation, vibration-free during initial start-up
• Uses and RL78 MCU (RL78/G1F) core (16-bit CISC, 44DMIPS at 32MHz)
• Flash ROM: 64KB (Data Flash: 4KB), RAM: 5.5KB
• Device supports field-oriented control (FOC) and 150 deg. commutation
• High power factor (PF), constant voltage isolated flyback AC/DC, offers high efficiency 
• VirtualZero™ technology offers very lower power and secure Wi-Fi modules
• Energy saving using a self-align dead time generator
• Integrated hardware and firmware protection features (Temperature abnormality, motor rotation abnormality, FET overcurrent, and abnormal voltage)

Applications

• IoT/Smart homes