Integrated AC Switch Circuit for Smart Home Automation
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Solution Overview
Problem
Traditional mechanical relays used in home automation for AC voltage control are bulky and have a short, non-constant operating life, which is inadequate for the evolving smart home automation technology.
Innovation Solution
The development of an electrical circuit with integrated AC switch circuits that charge capacitors via rectified AC voltage, providing pulse signals and enabling efficient control of AC loads, while reducing leakage current for high impedance loads and extending operational life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical relay is used for AC voltage control, then the control function is achieved, but the device size becomes bulky and operating life becomes short and non-constant
Solution Approach 1:
The patent replaces the mechanical relay system with an integrated AC switch circuit that uses solid-state electronic components including MOSFETs, capacitors, and control circuits. This substitution eliminates mechanical moving parts, thereby achieving compact size while simultaneously improving reliability and extending operating life through the use of durable electronic components.
Solution Approach 2:
The patent integrates multiple functions including AC switching, power generation, capacitor charging, and control logic into a single integrated circuit chip. This merging of previously separate components into one compact unit reduces overall device volume while maintaining or improving reliability through integrated design and reduced connection points.
2Volume of moving object
If integrated AC switch circuit is used, then device size is reduced, but power generation capability must be enhanced to maintain reliability
Solution Approach 1:
The integrated AC switch circuit includes an internal power generation circuit that automatically rectifies the AC voltage and charges an integrated capacitor to generate the required DC voltage. This self-service power generation capability eliminates the need for external power supplies or batteries, providing sustained operation and enhanced reliability while maintaining compact size.
Solution Approach 2:
The integrated circuit performs multiple functions within a single device: AC voltage rectification, capacitor charging, DC voltage generation, load switching control, and power management. This multi-functionality ensures adequate power generation capability is built-in to support all operations, maintaining reliability while achieving compact integration.
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
The solution provides efficient, reliable, and long-lasting control of AC loads, addressing the limitations of mechanical relays by integrating AC switch circuits on a single chip with advanced power generation and communication capabilities, enhancing the performance and longevity of smart home automation systems.
Implementation Method 1
a first power generation circuit configured to charge a first capacitor via rectifying the AC voltage
Data Source
AI summary
An electrical circuit has a first integrated AC switch circuit connecting a first load to an AC voltage when the first integrated AC switch circuit is ON and a second integrated AC switch circuit connecting a second load to the AC voltage when the second integrated AC switch circuit is ON. The first integrated AC switch circuit generates a first DC voltage across a first capacitor and provides a pulse signal. When a VCCE pin of the second integrated AC switch circuit is coupled to a reference ground, a second capacitor is charged by the second integrated AC switch circuit to provide a second DC voltage. And when the VCCE pin of the second integrated AC switch circuit is floating or pulls high, the second capacitor is charged by the pulse signal.