How to Reduce Fan Noise by 60% and Achieve Level 1 Energy Efficiency with a Custom BLDC Fan PCB

Client Background & Challenges

Our client is a leading consumer electronics brand focused on high-end smart home appliances. When developing their new generation of premium fans, they encountered significant technical bottlenecks regarding noise, energy efficiency, and motor stability.

• High Noise Levels: Traditional square-wave drives created excessive commutation noise.
• High Energy Consumption: Outdated systems failed to meet Level 1 efficiency standards.
• Poor Low-Speed Stability: Noticeable jerking at low speeds prevented a "natural wind" experience.

The Ruichun Solution

Ruichun engineered an optimized sensorless FOC BLDC fan control board:

• Sensorless FOC: Precision current control for superior efficiency.
• Sine Wave Drive: Eliminated mechanical and electromagnetic noise.
• Stepless Adjustment: Guaranteed smooth speed transitions.

Results & Market Impact

The new series achieved a 60% noise reduction and perfected the "natural wind" sensation, significantly boosting product market competitiveness.

"Ruichun Technology not only provided technological solutions, but also brought a profound transformation in our product philosophy."

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