The **W2AC-A13B-R** is a specific model within the **W2AC series** of high-performance AC Axial Fans manufactured by **Sanyo Denki** (San Ace brand). These fans are primarily used for thermal management in industrial equipment, servers, and power supplies. --- ### 1. Key Technical Specifications The electrical and mechanical components are designed for long-life operation in demanding environments. | Feature | Specification | | :--- | :--- | | **Input Voltage** | 100V / 115V AC (Depending on specific regional winding) | | **Frequency** | 50 / 60 Hz | | **Input Power** | Approx. 14W to 16W | | **Speed** | High Speed (typically ~2700 to 3100 RPM) | | **Bearing Type** | Dual Ball Bearing | | **Frame Size** | 120mm x 120mm x 38mm | | **Material** | Aluminum Frame / Plastic Impeller (UL 94V-0) | --- ### 2. Internal Electronic Components & Design The W2AC-A13B-R consists of several critical sub-assemblies that handle the conversion of AC power into rotational kinetic energy: #### A. The Induction Motor Unlike DC fans that use a PCB with a controller IC, this AC fan uses a **Shaded Pole** or **Capacitor-run Induction Motor**. - **Stator Winding:** High-quality copper coils insulated to withstand heat. - **Rotor:** A permanent magnet or induction rotor balanced precisely to reduce vibration. #### B. Bearings (Mechanical/Electronic Hybrid) - **Dual Ball Bearings:** The "R" suffix often denotes a design revision or specific bearing life rating. Ball bearings are used instead of sleeve bearings to ensure the fan can operate in any orientation without leaking lubricant. #### C. Protection Circuits - **Impedance Protection:** Most fans in this series are "Impedance Protected." This means the motor is designed so that if the fan blade is blocked (locked rotor), the internal resistance of the coils prevents the temperature from rising high enough to start a fire. - **Burnout Protection:** Built-in thermal cut-offs are common in San Ace AC models to prevent electrical shorts. #### D. Termination (Wiring) - **Lead Wires:** Standard UL-rated wires (usually Black/Black or Black/Red depending on the internal wiring scheme). --- ### 3. Application Use Cases Because of its aluminum housing and AC power input, the W2AC-A13B-R is found in: 1. **Control Panels:** Cooling PLCs and industrial relays. 2. **Server Racks:** Providing high-volume airflow for networking gear. 3. **Medical Equipment:** Reliable cooling for imaging or laboratory machines. ---