"Overview and Principles of Wireless Charging Transmitters and Devices"

Title: Innovations in Wireless Charging Technology: A Comprehensive Overview of a New Charging Solution

Technical Field
The present innovation pertains to advancements in wireless charging transmitters and devices, focusing on enhancing efficiency and usability in the realm of wireless power transmission.

Introduction
Wireless charging technology has gained significant traction in recent years, emerging as a convenient alternative for powering portable electronic devices without the need for physical connections. At the core of this technology lies the principle of electromagnetic induction, which has matured significantly, especially for consumer electronics. However, current solutions, such as those endorsed by various industry alliances, still face limitations that hinder their effectiveness, particularly for high-power applications.

Challenges in Existing Wireless Charging Solutions
Current wireless charging systems predominantly support low-power devices, typically limited to outputs of 5W. This restriction poses a challenge for more power-hungry devices, such as tablets, which often require 10W or more. Additionally, existing technologies suffer from several key drawbacks:

1. Limited Output Power: Most systems are confined to low-power applications, restricting their versatility.

2. Short Transmission Distance: The operational range is typically limited to a vertical distance of about 2 centimeters, which can compromise reliability as the distance increases.

3. High Power Consumption: The methods used for data packet modulation lead to increased power consumption, which can detract from overall efficiency.

4. Complex Communication Requirements: Many systems require additional communication modules (e.g., RFID, Bluetooth) for data feedback, increasing both complexity and production costs.

Proposed Solution
To address these limitations, the present innovation introduces a wireless charging transmitter and receiver system that integrates communication capabilities directly into the power transmission coils. This dual functionality aims to enhance output power, extend transmission distance, and reduce power consumption associated with data feedback.

Technical Framework
The proposed wireless charging transmitter comprises several key components:

• PWM Pulse Generator: This component generates driving pulses that control the operation of the system.

• Driving Circuit: Utilizing a full bridge driving chip, this circuit amplifies the driving pulses, ensuring efficient power delivery.

• Resonant Transmitting Circuit: This circuit includes a transmitting coil and a resonant capacitor, facilitating effective power transmission.

• PPM Decoding Circuit: This circuit processes feedback from the receiving device, enabling real-time adjustments to the transmission power.

• Power Supply Circuit: This includes AC-DC and DC-DC conversion circuits to ensure a stable power supply to the system.

The receiver is designed to include a resonant receiving circuit, a full bridge rectifier circuit, and a PPM encoding circuit, which collectively manage the conversion of received power into usable energy while also allowing for feedback communication.

Operational Advantages
1. Integrated Communication: By utilizing the power transmission coils as communication coils, the system can effectively relay charging information using Pulse Position Modulation (PPM). This method is known for its simplicity and reliability, enabling efficient data transmission even at distances up to 5 cm.

1. Increased Power Output: The system is designed to achieve a maximum output power of 15W, making it suitable for a wider range of applications beyond standard low-power devices.

2. Cost Efficiency: The innovative design reduces the complexity of components and assembly, leading to lower production costs and easier commercialization.

3. Enhanced Safety Features: The system includes mechanisms to detect overcurrent or overvoltage conditions, allowing it to halt power transmission when necessary, thereby protecting both the device and the user.

Conclusion
The development of this new wireless charging transmitter and receiver system represents a significant step forward in the field of wireless power technology. By addressing the limitations of existing solutions, this innovation not only enhances charging efficiency but also broadens the potential applications for wireless charging in consumer electronics. With its dual functionality, increased power output, and cost-effective design, this technology is poised to redefine the landscape of wireless charging, making it a more viable option for a diverse range of electronic devices.