The **W2AC-A44A-R/Q** refers to a high-performance Axial Fan assembly, typically manufactured by brands like **EBM-Papst**. This specific model belongs to a series of AC fans used for industrial cooling and ventilation. ### 1. Technical Specifications Overview The following table summarizes the primary electronic and mechanical characteristics: | Parameter | Specification | | :--- | :--- | | **Input Voltage** | 230 VAC (Single-Phase) | | **Frequency** | 50 / 60 Hz | | **Power Consumption** | ~27 W to 30 W | | **Current Draw** | ~0.18 A to 0.22 A | | **Speed (RPM)** | 2800 - 3250 RPM | | **Airflow Capacity** | ~325 m³/h (190 CFM) | | **Bearing Type** | Ball Bearings | | **Termination** | Leads or Plug-in (depending on "R/Q" variant) | --- ### 2. Key Electronic Components & Design #### A. External Rotor Motor Unlike standard motors where the rotor is inside the stator, this part uses an **external rotor** design. - **Stator:** Located in the center, fixed to the housing. - **Rotor:** Rotates on the outside, with the fan blades integrated directly onto the rotor housing. This provides a very compact design and superior cooling for the motor itself. #### B. Capacitor-Run Induction Motor This fan utilizes a permanent split capacitor (PSC) motor architecture. * **Starting Capacitor:** It requires a specific capacitance (often integrated or required externally depending on the exact sub-model) to create a phase shift in the windings, allowing the motor to start and run efficiently. * **Windings:** High-quality copper windings with Class F or Class B insulation to withstand continuous thermal stress. #### C. Thermal Protection The "A44A" series usually includes **Impedance Protection** or a **Thermal Overload Protector (TOP)**. * If the rotor is locked (e.g., by debris), the electronic design prevents the coils from overheating and catching fire by limiting the current or tripping a thermal switch. --- ### 3. Material and Environmental Ratings * **Housing:** Die-cast aluminum for heat dissipation and structural rigidity. * **Impeller:** Sheet steel, directly welded to the rotor. * **Ingress Protection:** Generally rated at **IP20** or higher, depending on the specific environmental sealing applied to the windings. ### 4. Part Number Suffix Meanings * **"R":** Often denotes the direction of rotation or a specific mounting rib configuration. * **"Q":** Generally refers to the electrical connection type (e.g., Quick-connect terminals vs. lead wires). ---