The **W2PV-C3B2-R2/UL** is a high-performance industrial cooling fan manufactured by **Sanyo Denki** as part of their **San Ace** series. This specific model is designed for high-pressure applications and features a sophisticated electronic control system to optimize airflow and efficiency. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Manufacturer** | Sanyo Denki | | **Series** | San Ace 120AD (W2PV Type) | | **Rated Voltage** | 100V to 240V AC (Wide Range) | | **Dimensions** | 120 x 120 x 38 mm | | **Bearing Type** | Dual Ball Bearing | | **Material** | Plastic (Frame & Impeller), UL 94V-0 Rated | | **Safety Standard** | UL/cUL Certified | --- ### 2. Electronic Component Breakdown The "W2PV" series is unique because it integrates a **DC motor system with an AC power input**. This is achieved through internal power conversion electronics. #### A. Internal AC-DC Conversion (Rectification) Unlike traditional AC fans that run directly on line frequency, this fan contains an internal **inverter/rectifier circuit**. * **Purpose:** It converts incoming AC voltage (100V-240V) into DC voltage to drive a brushless DC (BLDC) motor. * **Benefit:** This allows the fan to maintain consistent performance regardless of whether the local power grid is 50Hz or 60Hz. #### B. Brushless DC (BLDC) Motor Electronics The core movement is driven by a 3-phase BLDC motor. * **Permanent Magnets:** Used in the rotor to reduce heat and increase torque. * **Hall Effect Sensors:** These sensors detect the position of the rotor and send data to the internal controller to ensure precise commutation (timing of the electrical pulses). #### C. Control and Protection Features The electronics inside the W2PV-C3B2-R2/UL include several protective measures: * **Locked Rotor Protection:** If the fan blades are obstructed, the electronic controller cuts power to the coils to prevent the motor from overheating or burning out. * **Reverse Polarity Protection:** Protects the internal circuitry from damage if wired incorrectly. * **Soft Start:** Gradually increases the fan speed upon power-up to reduce the initial current surge (inrush current). --- ### 3. Part Number Suffix Breakdown * **W2PV:** San Ace 120AD series (High Static Pressure type). * **C3B2:** Internal manufacturer code for specific performance curves (Airflow vs. Static Pressure). * **R2:** Typically refers to a specific sensor output (e.g., Lock Sensor or Pulse/Tachometer output). * **UL:** Indicates compliance with Underwriters Laboratories safety standards. --- ### 4. Typical Applications Due to its high static pressure and wide voltage range, it is commonly used in: 1. **Server Racks:** Where high density requires forcing air through tight spaces. 2. **Industrial Inverters:** Cooling high-power switching electronics. 3. **Medical Equipment:** Where reliability and safety certifications are mandatory.