Converter Equivalent Resistance Control for TRIAC Stability
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Solution Overview
Problem
The existing architectures for controlling equivalent resistance in converters, particularly in TRIAC and PFC systems, incur increased manufacturing costs and energy losses due to the need for additional components like bleeder and damper circuits to manage conduction angles and short surge vibrations during dimming operations.
Innovation Solution
A method and apparatus that utilize a voltage conversion module with a switch, capable of operating in three modes (damper, bleeder, and converter modes), where the equivalent resistance is adjusted by generating control signals based on the power source input signal's voltage and current levels to prevent vibrations and maintain required holding currents, thereby eliminating the need for passive dampers and bleeders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional bleeder and damper circuits are added to manage conduction angles and short surge vibrations, then the reliability and stability of the TRIAC operation is improved, but the manufacturing cost and device complexity increase
Solution Approach 1:
The patent combines the functions of the voltage conversion module, damper circuit, and bleeder circuit into a single integrated converter system. The controller within this integrated system performs multiple functions including detecting ringing vibrations, adjusting equivalent resistance to dampen vibrations, and regulating output voltage, thereby eliminating the need for separate standalone damper and bleeder circuits while maintaining reliable TRIAC operation.
Solution Approach 2:
The integrated converter system is designed to perform multiple functions simultaneously: it converts voltage, dampens ringing vibrations through active equivalent resistance adjustment, provides holding current for the TRIAC, and regulates output voltage. This multi-functional design replaces multiple specialized components with a single universal system, reducing overall device complexity while improving reliability.
2Stability of the object's composition
If resistance damper is used to limit short surge vibration, then the stability of the power source input signal is improved, but extra energy loss occurs
Solution Approach 1:
The system dynamically adjusts the equivalent resistance of the voltage conversion module based on real-time detection of the power source input signal characteristics. When ringing vibrations are detected, the controller increases the equivalent resistance to dampen the vibrations; when no vibrations are present, the resistance is reduced to minimize energy loss. This dynamic adaptation allows the system to maintain signal stability only when necessary, thereby reducing overall energy consumption compared to a static resistance damper.
Solution Approach 2:
The controller changes the operating parameters of the voltage conversion module by adjusting its equivalent resistance based on the detected signal conditions. By varying the resistance parameter in response to ringing vibrations and adjusting switching frequency and duty ratio to maintain output voltage, the system achieves vibration suppression with minimal energy dissipation, overcoming the limitation of fixed resistance dampers that continuously consume energy.
3Stability of the object's composition
If the voltage conversion module operates in damper mode with adjusted equivalent resistance, then the ringing vibration is reduced, but the conversion efficiency may be affected
Solution Approach 1:
The controller implements periodic detection of the power source input signal to identify ringing vibrations and switches the voltage conversion module between damper mode and converter mode accordingly. This periodic monitoring and mode switching ensures that the equivalent resistance is adjusted only when vibrations are present, allowing the system to maintain high conversion efficiency during normal operation while providing vibration suppression when needed, thus minimizing the impact on overall energy efficiency.
Data Source
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AI summary
The disclosure provides a method for controlling an equivalent resistance of a converter. The method includes receiving a power source input signal, generating a first control signal according to a voltage level and a state of the power source input signal to adjust an equivalent resistance of the voltage conversion module and cause the voltage conversion module to operate in the damper mode or the converter mode, when the voltage conversion module operates in the converter mode converting the power source input signal to an output signal, and when the voltage conversion module operates in the damper mode detecting the voltage level or the current level of the power source input signal, and adjusting the equivalent resistance so that the voltage conversion module could operate in the bleeder mode or the converter mode to convert the power source input signal to the output signal.