PET Transmitter Capacitance for Receiver-Free Fault Sampling
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Solution Overview
Problem
Existing packet energy transfer (PET) systems require a receiver, load, or cable to be present for safe operation, limiting their operational flexibility and safety features.
Innovation Solution
A PET transmitter is designed with input conditioning and protection circuitry, including a front end circuit and a source controller, which provides a minimum effective cross-line capacitance even without a receiver connected, allowing the system to differentiate between fault and no-fault conditions during sample periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a receiver or load is required to be present for safe operation in existing PET systems, then fault detection capability is maintained, but operational flexibility and start-up time are limited
Solution Approach 1:
The patent applies preliminary action by pre-charging the transmission line capacitance through the front end circuit before actual power transfer begins. This allows the system to perform safety checks and establish operational parameters in advance, enabling the transmitter to operate safely without a receiver or load connected during start-up, thereby reducing start-up time and improving operational flexibility.
2Adaptability or versatility
If a receiver or load is required to be present for safe operation in existing PET systems, then proper voltage sampling is ensured, but the system cannot operate without connected devices
Solution Approach 1:
The patent introduces an intermediary capacitance element in the front end circuit that mediates between the transmitter and the transmission line. This intermediary capacitance allows the system to perform voltage sampling and fault detection during the sample period even when no receiver or load is connected, by providing the necessary electrical characteristics for accurate measurement without requiring an external device.
3Adaptability or versatility
If existing PET systems require a receiver or load connected, then safety during power transfer is maintained, but hot-pluggable receiver capability is limited
Solution Approach 1:
The system performs preliminary safety checks and voltage sampling during the sample period before power transfer begins. This preliminary action ensures that the transmission line is properly charged and any faults are detected before a hot-pluggable receiver is connected, maintaining safety while enabling hot-plug capability.
Solution Approach 2:
The patent implements periodic switching between sample period and transfer period. During each sample period, the system periodically checks voltage characteristics and line integrity. This periodic action continues even after a receiver is connected, ensuring ongoing safety monitoring and enabling reliable hot-pluggable operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables the PET transmitter to operate safely and effectively without a receiver or load connected, reducing start-up time and allowing for hot-pluggable receivers, while maintaining the ability to detect faults in the transmission line.
Implementation Method 1
a minimum effective cross-line capacitance without a PET receiver being in electrical communication with the output of the front end circuit. The minimum effective cross-line capacitance enables the source controller, during the sample period to differentiate a measured voltage at the output of the front end circuit indicative of a fault
Data Source
AI summary
A PET transmitter including an input conditioning and protection circuitry electrically connected to an electrical source, having an output and a switch connected at the output. There is a front end circuit having an input connected to the switch and an output connected to a PET transmission line. There is a source controller configured to close the switch to connect the source to the output of the front end circuit during a transfer period and open the switch to disconnect the source during a sample period. Across the output of the front end circuit, there is a minimum effective cross-line capacitance that enables the source controller to differentiate a measured voltage at the output of the front end circuit indicative of a fault and a measured voltage indicative of no fault without a PET receiver being in electrical communication with the output of the front end circuit.