The **WPT-55W2-R** is a high-performance wireless power transfer (WPT) receiver/transmitter module often utilized in industrial and consumer electronics for cable-free charging. Below is a detailed breakdown of its electronic components and specifications. --- ### ## Core Technical Specifications The module is designed to handle high-power delivery while maintaining efficiency. | Parameter | Specification | | :--- | :--- | | **Output Power** | 55 Watts (Maximum) | | **Standard Compliance** | Proprietary / High-Power WPT Standard | | **Efficiency** | > 85% at optimal alignment | | **Interface** | UART / I2C for communication & status monitoring | | **Cooling** | Integrated thermal pad / Heatsink compatible | --- ### ## Electronic Component Breakdown The WPT-55W2-R consists of several critical stages to convert magnetic fields into usable DC electrical energy. #### 1. Resonant Coil Assembly * **The Coil:** Usually a multi-strand Litz wire coil to minimize the skin effect at high frequencies. * **Ferrite Shielding:** A high-permeability magnetic sheet placed behind the coil to direct magnetic flux and prevent EMI (Electromagnetic Interference) from affecting the surrounding circuitry. #### 2. Power Conversion Stage (Rectification) * **Active Rectifier Bridge:** Unlike standard diodes, this module typically uses high-efficiency MOSFETs in a bridge configuration to convert the AC signal from the coil into DC with minimal heat loss. * **Resonant Capacitors:** High-voltage, low-ESR (Equivalent Series Resistance) capacitors tuned to the specific frequency of the transmitter to achieve resonance. #### 3. Control & Communication Logic * **MCU (Microcontroller):** Manages the handshake between the transmitter and receiver. It monitors voltage levels and thermal sensors. * **FOD (Foreign Object Detection):** Specialized circuitry that detects metal objects between the coils to prevent fires or damage. #### 4. Output Regulation * **Buck/Boost Converter:** Stabilizes the rectified DC voltage to a constant output (often 12V, 19V, or 24V depending on the specific revision) for the end device. --- ### ## Key Features for Integration * **Thermal Protection:** Built-in NTC (Negative Temperature Coefficient) thermistors to shut down the module if temperatures exceed safe limits. * **Alignment Feedback:** Electronic signaling that informs the user if the transmitter and receiver are correctly aligned for maximum power transfer. * **Low Standby Power:** Advanced power management chips that reduce "vampire" power draw when no device is being charged.