Wireless Power Switch Control Without Neutral Wire
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional wireless automation control systems face increased complexity and cost due to the absence of a NEUTRAL wire in switch boxes, requiring additional wiring or battery replacement, which is inconvenient.
Innovation Solution
A control system for a wireless power switch that uses only a LINE wire and a switch wire, employing a power acquiring device with parallel connections to these wires to generate DC voltage for charging a battery when the switch is open, and utilizing the battery power when the switch is closed, allowing the system to function without a NEUTRAL wire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional wireless automation control system is used without a NEUTRAL wire, then the system can be installed in existing switch boxes, but the system complexity and cost increase due to requiring additional wiring or battery replacement mechanisms
Solution Approach 1:
The patent introduces a capacitor as an intermediary energy storage component between the power acquiring device and the wireless automation control device. The capacitor stores electrical energy during the switch-off period and releases it during the switch-on period, enabling the control system to operate without a NEUTRAL wire while maintaining simple system architecture
Solution Approach 2:
The system operates in periodic cycles: during the switch-off period, the power acquiring device charges the capacitor; during the switch-on period, the capacitor discharges to power the control device. This periodic charge-discharge mechanism enables continuous operation without requiring constant power connection or complex battery replacement systems
2Reliability
If additional NEUTRAL wire is pulled for power supply, then the wireless automation control system can function properly, but the installation complexity and cost increase
Solution Approach 1:
The patent extracts the NEUTRAL wire requirement from the traditional power supply system by using the switch wire's voltage fluctuations (present when switch is off) to charge the capacitor. This eliminates the need to pull additional NEUTRAL wire through walls while maintaining reliable power supply for the control device
Solution Approach 2:
The system uses the existing switch wire and LINE wire to generate and store its own power through the capacitor during switch-off periods. The power acquiring device automatically charges the capacitor from the available voltage, making the system self-powered without requiring external NEUTRAL wire installation
3Adaptability or versatility
If a battery is used as power supply, then the control system can operate without NEUTRAL wire, but battery replacement becomes inconvenient
Solution Approach 1:
The patent replaces the expensive and inconvenient permanent battery with a cheap capacitor that can be rapidly recharged from the existing wiring. The capacitor serves as a short-term energy storage device that is continuously replenished during switch-off periods, eliminating battery replacement inconvenience while enabling operation without NEUTRAL wire
Solution Approach 2:
Instead of using disposable batteries that need replacement, the system recovers and stores electrical energy repeatedly in the capacitor during each switch-off period. This continuous energy recovery and storage mechanism eliminates the need for battery replacement while maintaining operational capability
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
Enables the wireless control of a power switch by providing power to the control system when the switch is open and using stored battery power when the switch is closed, reducing system complexity and cost by eliminating the need for a NEUTRAL wire.
Implementation Method 1
a rectifier circuitry 2432 coupled to the transformer circuitry 2431 and configured to convert the transformed voltage to a rectified voltage
Implementation Method 2
a filter circuitry 2433 coupled to the rectifier circuitry 2432 and configured to filter the rectified voltage to generate a filtered voltage
Implementation Method 3
a capacitor 2424 configured to store the converted voltage
Data Source
AI summary
A control system for a wireless power switch without a NEUTRAL wire comprises a wireless controlled power switch with both terminals connected between a LINE wire and a switch wire of a switch box without the NEUTRAL wire; a power acquiring device having two power input terminals respectively connected to the LINE wire and the switch wire of the switch box; and a wireless automation control device receiving an output voltage of the power acquiring device as the required power, the wireless automation control device controlling open or close of the wireless controlled power switch according to wireless control signal wirelessly. Specifically, a load device is connected between the switch wire and the NEUTRAL wire, and impedance between the two power input terminals of the power acquiring device is substantially larger than impedance of the load device.