Dimmer Control System with Time-Limited Dummy Load
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Solution Overview
Problem
Existing circuit systems with phase dimmers experience high power consumption and reduced power factor due to unnecessary dummy loads, which are not effectively controlled after the dimmer is turned on.
Innovation Solution
A control system comprising a detection circuit, a control circuit, and a dummy load system, where the detection circuit detects a level switch in direct-current voltage and outputs an activating signal to the control circuit, which generates a turn-on signal to control the dummy load system, ensuring it is only active for a predetermined time to minimize power consumption and maintain a better power factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dummy load is continuously placed in the circuit to suppress oscillation, then the oscillation suppression is improved, but the power consumption increases and power factor deteriorates
Solution Approach 1:
The dummy load is activated periodically only during the initial oscillation suppression period after the dimmer is turned on, rather than continuously. The control circuit detects the on-state of the dimmer and activates the dummy load for a predetermined time duration to suppress oscillations, then deactivates it to reduce power consumption.
Solution Approach 2:
The dummy load system transitions from a static continuous operation mode to a dynamic controlled operation mode. The resistance value of the dummy load is dynamically adjusted by turning it on and off based on the operational state of the dimmer, optimizing both oscillation suppression and power consumption.
2Reliability
If a dummy load is continuously placed in the circuit to suppress oscillation, then the oscillation suppression is improved, but the power factor deteriorates
Solution Approach 1:
The dummy load is activated periodically only during the initial oscillation suppression period after the dimmer is turned on, rather than continuously. The control circuit detects the on-state of the dimmer and activates the dummy load for a predetermined time duration to suppress oscillations, then deactivates it to reduce power consumption.
Solution Approach 2:
The dummy load system transitions from a static continuous operation mode to a dynamic controlled operation mode. The resistance value of the dummy load is dynamically adjusted by turning it on and off based on the operational state of the dimmer, optimizing both oscillation suppression and power consumption.
3Loss of energy
If the dummy load is activated for a predetermined time only, then the power consumption is reduced, but the oscillation suppression may be insufficient
Solution Approach 1:
The control circuit uses feedback from the dimmer's on-state detection to determine when to activate the dummy load. By monitoring the operational state of the dimmer, the system ensures the dummy load is activated at the appropriate time to suppress oscillations while deactivating it afterward to reduce power consumption.
Solution Approach 2:
The dummy load is activated in advance for a predetermined time duration immediately when the dimmer is turned on, before the oscillation issue would persist. This preliminary action ensures oscillation suppression during the critical initial period without requiring continuous activation.
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 control system reduces unnecessary power consumption and improves the power factor by only activating the dummy load when necessary, thereby optimizing energy usage and performance in lighting applications.
Implementation Method 1
The detection circuit detects a level switch of a direct-current voltage, and the detection circuit outputs an activating signal when the detection circuit detects the level switch of the direct-current voltage
Implementation Method 2
The rectifier rectifies the modulated alternating-current voltage to generate the direct-current voltage
Implementation Method 3
The filter filters the direct-current voltage
Implementation Method 4
The switch circuit is connected with the dummy load in series. The control circuit receives the activating signal to continuously output the turn-on signal for a predetermined time, and the switch circuit receives the turn-on signal to turn on the dummy load
Data Source
AI summary
A control system includes a detection circuit, a control circuit, and a dummy load system. The detection circuit is operable to detect a voltage level change of a direct-current voltage and output an activating signal when detecting the voltage level change of the DC voltage. The control circuit is operable to receive the activating signal. The dummy load system is electrically connected to the control circuit, and the control circuit controls the dummy load system by generating a turn-on signal in response to receiving the activating signal. A dimmer system and a control method thereof are further disclosed herein.