CLK Self-Locking
Utilizes CLK self-locking phase speed control to achieve speed fluctuation below 0.01%, meeting the requirements of high-speed fans.

Parameter Identification
An improved low-speed observer enables startup with only a single parameter adjustment, ensuring reliable startup across different motors, loads, and application scenarios.

No-Tuning Algorithm

• Offline parameter identification: ≤10% error, compatible with all motors in the same series via a single firmware.

• Online parameter identification: Real-time motor parameter monitoring enables accurate temperature estimation and protection.
  Solves factory testing limitations where LCR meters are unavailable for motor parameter measurement.

Reverse Wind Braking (Negative Current Handling)
Cooling fans demand high reverse wind resistance. Traditional braking methods fail at full-speed reversal.
Fengzhao's solution: Safe full-speed braking under controlled current conditions.

Efficiency Self-Adaptation
Optimizes efficiency via:

• Zero-cross detection of back-EMF through windowing

• Electrical angle alignment
  Eliminates complex debugging processes while enhancing tuning efficiency.

Dual Control Mode

• Non-full-speed FOC + Full-speed FOC/Square Wave Hybrid
  Reduces switching losses at full speed, lowering temperature rise and extending lifespan.

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