AC Chopper Wall Controller for Stable Fan Light Signal Control
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Solution Overview
Problem
Existing fan light control systems are prone to interference, leading to instability and complexity in signal control, particularly with high-cost wall controllers connected in series, causing signal distortion and reduced controllability.
Innovation Solution
A control system utilizing an AC chopper wall-controller and a main controller with a rectification step-down filter circuit, connected to a central control circuit, and a load signal detection circuit, which recognizes signals without interference and outputs accurate control signals to improve controllability and simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wire control or wall control is used for ceiling fans, then control functionality is achieved, but the control structure becomes inconvenient and signal distortion occurs
Solution Approach 1:
The patent replaces the mechanical wire control system with an AC-powered control system. The controller is powered directly from AC mains through a rectification circuit, eliminating the need for separate control wires and their associated signal integrity issues. This substitution of the power and control delivery mechanism resolves both the convenience and reliability problems.
Solution Approach 2:
The patent introduces an AC chopper circuit as an intermediary between the AC power source and the control logic. This chopper circuit converts AC power into controlled pulses that drive the fan motor and light bulb, serving as a mediator that eliminates direct wire control while maintaining precise control functionality.
2Adaptability or versatility
If wall controller is connected in series to fan light main controller, then control integration is achieved, but cost increases and interference occurs
Solution Approach 1:
The patent merges the functions of the wall controller and the fan light main controller into a single integrated unit. The AC-powered controller combines motor control, light control, and power management in one device, eliminating the need for separate wall controllers and reducing overall system complexity while maintaining full control integration.
Solution Approach 2:
The controller is designed as a universal AC-powered device that can control both the fan motor and light bulb simultaneously. It incorporates multiple control modes (forward/reverse rotation, speed control, light dimming) in a single unit, replacing multiple specialized controllers with one multi-functional device.
3Adaptability or versatility
If wall controller is connected in series to fan light main controller, then control integration is achieved, but interference to fan light main controller increases
Solution Approach 1:
The patent replaces the series-connected wall controller architecture with an AC-powered control system that draws power directly from mains. This substitution eliminates the signal paths that caused interference in the series connection architecture, while maintaining full control integration through the AC chopper circuit.
Solution Approach 2:
The patent extracts the power supply function from the control signal path. By providing separate AC-powered supply to the controller, it removes the dependency of control signals on power wiring, thereby eliminating the interference that occurred when wall controllers were series-connected to the main controller.
4Ease of operation
If existing fan light control system is used, then basic control is achieved, but susceptibility to interference affects stability
Solution Approach 1:
The patent incorporates a rectification circuit and filtering capacitor that smooth out voltage fluctuations and electrical noise before they reach the control logic. This beforehand cushioning of the power supply protects the control system from interference, ensuring stable operation while maintaining full control functionality.
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 system stabilizes signal transmission, enhances controllability, and simplifies operation by accurately controlling fan speed, direction, and light functions, including dimming and color adjustment, while being resistant to power outages.
Implementation Method 1
a rectification step-down filter circuit electrically connected to the AC chopper wall-controller
Implementation Method 2
a rectification step-down filter circuit electrically connected to the AC chopper wall-controller
Data Source
AI summary
The invention relates to a control system, which is composed of a main controller electrically connected to an AC chopper wall-controller, enabling users to control the AC chopper wall-controller by pressing, and the AC chopper wall-controller fully utilizes the principle of AC electricity and combining it with the characteristics of AC zero-crossing circuit, the main controller that controls an electrical appliance is capable of easily identifying signals, and at the same time, signals of the main controller will not be interfered due to a short power outage, thus capable of working stably.