Dimmer Actuator Integrating Air-Gap Switch and Power Control
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Solution Overview
Problem
There is a need for further development in dimmer switches, specifically those incorporating an air-gap switch to enhance safety and control mechanisms, as existing solutions do not fully address the requirements for mechanical disconnection of power and adjustable power delivery.
Innovation Solution
A dimmer switch design that includes an air-gap switch coupled with a power semiconductor switch and a dimmer module, where a dimmer actuator functions as a single control mechanism to either adjust power delivery or engage the air-gap switch for disconnection, utilizing a pivotable mechanism with distinct pivot axes for operational and disconnected positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a separate main actuator and dimmer actuator are used, then power switching and dimming control functions are clearly separated, but the device complexity increases and space is wasted
Solution Approach 1:
The patent combines the main actuator and dimmer actuator into a single integrated actuator structure. The actuator body includes both a main actuator portion for power switching and a dimmer actuator portion for dimming control, eliminating the need for separate actuators and reducing overall device complexity while maintaining distinct control functions
Solution Approach 2:
The integrated actuator serves multiple functions: it can switch power on/off through the main actuator portion and simultaneously provide dimming control through the dimmer actuator portion. This multi-functional design reduces the number of components needed while providing comprehensive control capabilities
2Reliability
If an air-gap switch is added for mechanical disconnection, then safety is improved, but the device complexity and size increase
Solution Approach 1:
The air-gap switch is integrated with the existing actuator mechanism rather than being a separate component. The actuator body directly engages the air-gap switch lever through a connection structure, combining the switching function with the mechanical disconnection function in a unified mechanism that reduces overall complexity
Solution Approach 2:
The air-gap switch mechanism is nested within the actuator assembly. The actuator body contains both the dimming control mechanism and the air-gap switch engagement mechanism, with the switch lever positioned to be engaged by the actuator body during rotation, creating a compact nested structure
3Adaptability or versatility
If the actuator is pivotally coupled with a single pivot, then the structure is simple, but it cannot achieve both dimming adjustment and air-gap switch engagement
Solution Approach 1:
The actuator body has an asymmetric geometry with a first portion for dimming engagement and a second portion for air-gap switch engagement. The asymmetric shape allows the actuator to engage different mechanisms at different rotational positions, enabling multiple functions from a single pivot structure without requiring symmetric components
Solution Approach 2:
The actuator transitions between different functional states through rotation about the pivot. At first positions, the actuator engages the dimming mechanism for power adjustment; at second positions, it engages the air-gap switch for mechanical disconnection. This dynamic reconfiguration allows a single pivot structure to support multiple functions
Data Source
AI summary
A dimmer switch includes an air-gap switch for coupling to a power source, a power semiconductor switch electronically controlling power to a load connected in series with the air-gap switch, a dimmer module connected to the power semiconductor switch for coupling to the load to deliver an adjustable level of power to the load, and a dimmer actuator. The dimmer actuator is movable between an operational position and a disconnected position wherein the dimmer actuator is configured to act as a single control mechanism for selectively engaging either the dimmer module to adjust the level of power delivered to the load when in the operational position or the air-gap switch when in the disconnected position.