Inverter air conditioner gradually enters people's life because of its advantages of environmental protection, energy saving and high comfort. As one of the core components of the air conditioner, the operation noise and performance not only affect the comfort of the air conditioner, but also affect the energy efficiency ratio and reliability of the air conditioner.

Air conditioner fans are developing from square wave drive of DC brushless motors to sine wave drive of low-noise permanent magnet synchronous motors, from Hall sensors to highly reliable sensorless. The air conditioner fan solution developed by Beineng International is based on the Cortex ®-Mx series of 32-bit MCUs to effectively realize the non-inductive sine control of permanent magnet synchronous motors.

The Cortex ®-Mx series MCUs have a variety of interfaces and peripherals specifically designed for motor drives and high-performance coprocessors, which can achieve precise / precise estimation and effective control of the rotor position of the fan. Control and application of advanced motors.

Functional block diagram

Features

•   Input voltage: 220V AC

•   Output power: 30W ~ 100W

•   Control mode: FOC sine control

•   Starting method: no sensor

•   Current sampling method: dual resistance sampling

•   Modulation frequency: 18KHz

•   Modulation method: SVPWM

•   Motor speed: 1500RPM ± 15RPM @ 5 pole pair

•   Analog voltage  / UART communication set operating speed

•   Running speed feedback output

•   Support forward and headwind start

•   Protection function: overcurrent, undervoltage, overvoltage, overtemperature, stall protection, etc.

•   Main features: reliable start, high efficiency, low noise

Application field 

• Air-conditioned indoor and outdoor fans, etc.