## Technical Analysis of W2AP-D2G-R/UL The **W2AP-D2G-R/UL** is a high-performance industrial AC fan manufactured by **Sanyo Denki** under the **San Ace** brand. It is an AC-powered axial fan designed for high-reliability cooling in server racks, industrial cabinets, and power supplies. ### 1. Key Specifications | Feature | Specification | | :--- | :--- | | **Input Voltage** | 100V - 115V AC (50/60Hz) | | **Dimensions** | 120mm x 120mm x 38mm | | **Bearing Type** | Dual Ball Bearing | | **Rated Speed** | 2,700 ~ 3,100 RPM | | **Airflow** | 88 ~ 102 CFM (Cubic Feet per Minute) | | **Material** | Aluminum Frame / Plastic Impeller (UL94V-0) | | **Safety Certification** | UL / CSA / CE | --- ### 2. Internal Electronic Components & Design The "D2G" series features specific internal architectures that distinguish it from standard consumer fans: #### A. Shaded Pole Motor Structure Unlike DC fans that use complex PCB controllers, this AC fan typically utilizes a **shaded pole** or **capacitor-run induction motor**. * **Stator Windings:** High-quality copper windings with thermal insulation to withstand continuous operation. * **Rotor:** A permanent magnet or induction rotor optimized for high torque to overcome static pressure. #### B. Thermal Protection The "UL" suffix indicates adherence to strict safety standards. The motor contains an internal **Impedance Protection** or **Thermal Cut-off** mechanism. If the fan blades are locked (locked rotor condition), the internal impedance prevents the coils from overheating and catching fire. #### C. Bearings and Longevity * **Dual Ball Bearings:** The "R" in the part number often denotes high-reliability revisions. Dual ball bearings allow the fan to be mounted in any orientation (horizontal or vertical) and provide a service life typically exceeding 40,000 to 70,000 hours at 60°C. #### D. Power Connection The unit usually features: * **Lead Wires:** UL1007 AWG24 or similar, typically two wires (Power and Neutral) as it is a single-phase AC device. * **Grounding:** The aluminum frame often includes a grounding point to prevent ESD (Electrostatic Discharge) buildup. --- ### 3. Application Use Cases 1. **Industrial Control Panels:** Heat dissipation for PLCs and Motor Drives. 2. **Network Enclosures:** Maintaining airflow in 19-inch server racks. 3. **Medical Equipment:** High-reliability cooling where downtime is not an option. ---