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Energy-Efficient High-End Electric Fan

Overview

Brushless DC (BLDC) motor fans are becoming increasingly popular as they overcome the challenges of traditional AC induction motor fans, such as overheating, speed fluctuations, lack of remote control features, and inefficiency. BLDC motor fans offer higher energy efficiency, longer service life, lower power consumption, and low noise. In addition to these advantages, BLDC motors provide more than 10 levels of multi-stage speed control or stepless speed regulation, offering users greater control options.

This energy-efficient high-end BLDC electric fan design includes remote control and key control options, an LED display, and current and speed feedback for faster and more precise control.

System Benefits:

  • MCU with three-phase complementary PWM outputs suitable for BLDC motor control
  • High-performance power and analog system that utilizes Renesas AC/DC regulator, op amps, and MOSFETs to ensure quality and stability

Block Diagram

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Template 1LineLine.141LED DriverLED DriverLED DriverConnector ArrowConnector Arrow.19Connector Arrow.20Remote Control IconSheet.22Sheet.23Sheet.24Sheet.25Sheet.26Sheet.27Sheet.28Sheet.29Sheet.30LCD/LED Segment DisplaySheet.32Sheet.33Sheet.34Sheet.35Sheet.36Sheet.37Sheet.38Sheet.39Sheet.40Sheet.41Sheet.42Sheet.43Sheet.44Sheet.45Sheet.46Sheet.47Sheet.48Sheet.49Sheet.50Sheet.51Sheet.52Sheet.53Sheet.54Sheet.55Sheet.56Sheet.57Sheet.58Sheet.59Sheet.60Sheet.61ONONSheet.62OFFOFFSheet.63Sheet.64Sheet.65Sheet.66Sheet.67Sheet.68Sheet.69Sheet.70Remote ControlRemote ControlRemote ControlConnector Arrow.72Touch KeySheet.74Sheet.75Sheet.76Sheet.77Sheet.78Sheet.79Sheet.80Sheet.81Sheet.82Control KeyControl KeyControl KeyConnector Arrow.84Connector Arrow.87AUX PowerAUX PowerAUX PowerConnector Arrow.8815V15V15V5V5V5VConnector Arrow.91Connector 1.160Connector Arrow.94Connector Arrow.98Connector Arrow.10115 V15V15VConnector Arrow.103MotorSheet.105Sheet.106MMBLDCBLDCBLDCConnector Arrow.108Connector Arrow.111Connector Arrow.114Connector 1.160.115CN085CN085CN085MCUMCUMCUMCUGPIO1GPIOGPIOGPIO2GPIOGPIOGPIO3GPIOGPIOPWMPWMPWM10-bit ADC10-bit ADC10-bit ADCGPIO4GPIOGPIOConnector Arrow.122AC Power Source.164Sheet.135Alternating CurrentConnector Line.142Connector Line.143ACACACCurrent/Speed FeedbackCurrent/Speed FeedbackCurrent/Speed FeedbackOp AmpOp AmpOp AmpMOSFET DriverMOSFET DriverMOSFET DriverMOSFET x6MOSFET x6MOSFET x6Connector Arrow.145AC/DCAC/DCAC/DCBuck RegulatorBuck RegulatorBuck RegulatorHall SensorHall SensorHall Sensor

MCU

RA Arm Cortex-M MCUs
RL78 Low-Power 8 & 16-Bit MCUs
RA Arm Cortex-M MCUs
RL78 Low-Power 8 & 16-Bit MCUs

MOSFET

Power MOSFETs

Op Amp

General-purpose Op Amps

Buck Regulator

Buck Regulators (Integrated FETs)

AC/DC

Non-Isolated AC/DC Buck Converters

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