Multi-mode Control Device Power Mode Switching
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Solution Overview
Problem
Existing control devices in lighting and electrical systems face challenges in performing monitoring functions when the load device is powered off, as they are electrically coupled to the power source, preventing operation in low-power modes.
Innovation Solution
A multi-mode control device with a high-power interface and a low-power interface allows the control device to switch between high-power and low-power modes, using current from the load device or alternate sources like leakage current, enabling monitoring and operation even when the load device is off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the control device is electrically coupled to the power source to control the load device, then the control device can transmit control signals to change the load device state, but the control device cannot perform monitoring functions or operations when the load device is powered off
Solution Approach 1:
The control device dynamically switches between high-power mode and low-power mode based on the operational state of the load device. When the load is powered on, the control device operates in high-power mode to provide full functionality. When the load is powered off, the control device transitions to low-power mode while maintaining essential monitoring capabilities through the trigger detection device, thus adapting its power consumption and functional capabilities to match system requirements.
Solution Approach 2:
The control device is segmented into multiple functional components with different power requirements: the occupancy sensor requiring high-power operation and the trigger detection device capable of low-power operation. This segmentation allows the control device to maintain essential monitoring functions through the trigger detection device even when the load is powered off, while reducing overall power consumption by disabling or reducing power to the occupancy sensor.
2Reliability
If the control device operates in high-power mode to power the occupancy sensor, then the occupancy sensor can function properly, but the control device cannot operate efficiently when the load device is off
Solution Approach 1:
The control device implements periodic switching between operational modes based on system state. The processing device monitors the power state of the load device and periodically transitions the control device between high-power mode (when load is on) and low-power mode (when load is off). This periodic action ensures the occupancy sensor receives adequate power when needed while minimizing overall energy consumption during periods when the load is inactive.
Solution Approach 2:
The control device changes the power parameter supplied to different components based on system state. The processing device adjusts the power level provided to the occupancy sensor and trigger detection device according to whether the load device is powered on or off. This parameter change allows the system to maintain sensor functionality when required while significantly reducing power consumption during low-activity periods.
3Use of energy by moving object
If the control device switches to low-power mode to enable monitoring when load is off, then power consumption is reduced, but the occupancy sensor cannot receive sufficient current
Solution Approach 1:
The trigger detection device serves as an intermediary component that can operate in low-power mode to detect trigger events even when the main occupancy sensor is powered down or operating at reduced power. This intermediary device maintains essential monitoring capability by detecting triggers through alternative means (such as leakage current detection) and can signal the processing device to reactivate the full occupancy sensor system when necessary.
Data Source
AI summary
A multi-mode control device is provided for controlling a load device. A high-power interface of the control device can be electrically coupled to a high-power module. An occupancy sensor can receive a first current from the high-power module via the high-power interface, and a trigger detection device can receive a second current that is less than the first current from a low-power module via a low-power interface. The processor can switch the control device from a high-power mode for powering the occupancy sensor to a low-power mode by causing a reduction in the current provided to the occupancy sensor and causing current to be provided to the trigger detection device. The trigger detection device can detect a trigger in the low-power mode. The processor can cause the control device to operate in the high-power mode based on the trigger's detection.