Summary of Wireless Transmitter System
This project is a wireless power transmission system using magnetic induction: a split transformer with the primary (transmitter) coil and secondary (receiver) coil. The receiver aligns with the transmitter for best coupling, rectifies and regulates received power to drive a load, and communicates operational data back to the transmitter for closed-loop control. The WCT1000 transmitter controller manages detection, frequency control based on receiver messages, digital demodulation, protections (OV/OC/thermal), foreign object detection, and indicator outputs for safe, efficient wireless charging.
Parts used in the Wireless Transmitter System:
- Transmitter coil (primary of split transformer)
- Receiver coil (secondary of split transformer)
- WCT1000 wireless power transmitter controller
- Power stage (switching elements for transmitter)
- Rectifier and voltage regulator on receiver
- Communication link between receiver and transmitter
- Foreign Object Detection (FOD) sensing components
- Protection circuitry for over-voltage, over-current, and temperature
- Indicator output components (LEDs or status indicators)
This wireless project is a power transmission system, it works on the principle of magnetic induction. This Wireless Charging system works as the digital switched mode power supply with the transformer, which is separated into two parts: The transformer primary coil is on the transmitter, working as the transmitter coil, and the transformer secondary coil is on the receiver side as the receiver coil. This system works based on magnetic induction, the better coupling between the transmitter coil and receiver coil gain, the better system efficiency. So the receiver coil should be closely and center aligned with the transmitter coil as possible. After the receiver coil receives the power from the transmitter coil by magnetic field, it regulates the received voltage to power the load, and send its operational information to transmitter according to specific protocol by the communication link. Then the system can achieve the closed-loop control, and power the load stably and wirelessly.
The WCT1000 is a wireless power transmitter controller, it is an intelligent device that can work with Freescale touch sensing technology to detect a mobile device for charging while gaining super low standby power. Once the mobile device is detected, the WCT1000 controls the power transfer by adjusting operation frequency of power stage according to message packets sent by mobile device. The WCT1000 includes digital demodulation module to reduce external components, over-voltage/current/ temperature protection and Foreign Object Detection (FOD) method to protect from overheating by misplaced metallic foreign objects. It also handles any abnormal condition and operational status, and provides comprehensive indicator outputs for robust
For more detail:
Wireless Transmitter System
- How does the wireless charging system transfer power?
It transfers power by magnetic induction using a transmitter coil as the transformer primary and a receiver coil as the transformer secondary. - How important is coil alignment for this system?
Coil alignment is important: better coupling from close, center-aligned coils improves system efficiency. - How does the receiver regulate power after receiving it?
The receiver rectifies and regulates the received voltage to power the load. - How does the transmitter adjust power transfer?
The WCT1000 adjusts the operation frequency of the power stage based on message packets sent by the mobile device. - Can the system detect a device for charging with low standby power?
Yes, the WCT1000 can detect a mobile device for charging while maintaining super low standby power using touch sensing technology. - Does the system provide protection against abnormal conditions?
Yes, it includes over-voltage, over-current, temperature protection and handles abnormal conditions. - How does the system prevent overheating from metallic objects?
It uses a Foreign Object Detection (FOD) method to protect from overheating caused by misplaced metallic foreign objects. - Does the WCT1000 reduce external component count?
Yes, it includes a digital demodulation module to reduce the number of external components.
