Smart Three-Way Switch Self-Configuration
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Solution Overview
Problem
Conventional smart three-way switches require identifying the Hot terminal of an AC power source for proper installation, which is time-consuming and costly, as users often need to rely on trial and error or hire a technician to connect the switches correctly.
Innovation Solution
A smart three-way switch system with two switches connected in a three-way circuit configuration, each having input and output terminals, a relay to selectively couple these terminals, and a controller to manage the relay, along with AC/DC converters to ensure uninterrupted DC power supply to the controller, allowing for swappable connections without identifying the Hot terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional smart three-way switches are installed using traditional wiring methods, then the switches can control the electrical load, but the installation requires identifying the Hot terminal which is time-consuming and costly
Solution Approach 1:
The smart switch automatically detects and adapts to the wiring configuration without requiring user identification of the Hot terminal. The device performs self-diagnosis and self-configuration, eliminating the need for users to manually identify terminals or perform trial-and-error connections.
Solution Approach 2:
The system changes its operational parameters based on the detected wiring configuration. By detecting which terminal receives continuous power and which receives intermittent power, the switch dynamically adjusts its internal circuitry to function correctly regardless of the specific wiring arrangement.
2Ease of operation
If conventional smart three-way switches are installed using traditional wiring methods, then the switches can control the electrical load, but users need to hire a technician which increases cost
Solution Approach 1:
The smart switch performs automatic detection and configuration, eliminating the need for professional technicians. The device guides itself through the installation process by detecting wiring conditions and automatically configuring its internal circuits, making installation reliable and accessible to ordinary users.
Solution Approach 2:
The system continuously monitors the electrical signals at its terminals and uses this feedback to determine the correct wiring configuration. By detecting the presence and characteristics of power signals, the switch automatically adjusts its operation to ensure reliable functionality without requiring expert intervention.
3Reliability
If the pole of one three-way switch is connected to the Hot terminal all the time, then the internal circuitry receives continuous power supply, but this requires precise identification of the Hot terminal during installation
Solution Approach 1:
The smart switch is designed to function correctly in multiple wiring configurations without requiring specific terminal identification. The device can operate reliably whether connected to continuous or intermittent power, as it automatically detects and adapts to the power supply pattern, making the wiring process simpler and more universal.
Solution Approach 2:
The switch dynamically adapts its internal circuitry based on the detected power supply pattern. Rather than requiring a fixed wiring configuration, the device changes its operational state based on whether it receives continuous or intermittent power, allowing flexible installation without compromising reliability.
4Ease of operation
If users rely on trial and error to identify the Hot terminal, then installation can be completed without a technician, but the process is time-consuming
Solution Approach 1:
The smart switch eliminates the trial-and-error process by performing automatic detection and configuration. The device independently identifies the wiring configuration through electrical signal detection and automatically configures itself, maintaining ease of installation while dramatically improving installation speed.
Solution Approach 2:
The manual trial-and-error process is replaced with an automated electrical detection system. The switch uses electronic sensing and signal analysis to automatically determine the wiring configuration, substituting the mechanical trial-and-error method with a faster, electronics-based detection mechanism.
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 easy and cost-effective installation of three-way smart switches by providing uninterrupted DC power to the internal control circuit, allowing the switches to function regardless of the initial connection, eliminating the need to identify the Hot terminal.
Implementation Method 1
a relay configured to selectively couple the first input terminal to the first output terminal or the second output terminal
Implementation Method 2
a first AC/DC converter coupled between the first output terminal and the controller, and a second AC/DC converter coupled between the second output terminal and the controller. The first AC/DC converter and the second AC/DC converter are configured to selectively receive the AC power from the corresponding first output terminal or the corresponding second output terminal that is selectively coupled with the first input terminal and to provide a DC power to the controller
Data Source
AI summary
A circuit for controlling electric load(s) includes two smart switches connected in a three-way circuit configuration. Each of the two smart switches includes a first and second input terminals configured to receive an AC power. The switch also includes a first and second output terminals configured to provide the AC power to an electric load, and further includes a relay configured to selectively couple the first input terminal to the first output terminal or the second output terminal, and a controller configured to control the coupling of the relay. The switch includes a first AC/DC converter and a second AC/DC converter. The first and second AC/DC converters are configured to selectively receive the AC power from the corresponding first or second output terminal that is selectively coupled with the first input terminal and to provide a DC power to the controller.