Power Converter Thyristor Control Triangle Wave Feedback
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Solution Overview
Problem
Conventional power converters struggle to precisely control output voltage to a target voltage without reducing power conversion efficiency, leading to fluctuating voltage amplitudes and inefficiencies when charging batteries or powering electronic devices.
Innovation Solution
A power converter system that includes a switch unit and a control unit generating a triangle wave voltage with a constant peak, creating a differential voltage between the output voltage and the target voltage to control the switch unit's conductive state, ensuring precise voltage control without compromising efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional power converters control output voltage using simple rectifier circuits with thyristors and Zener diodes, then the device complexity is reduced, but the manufacturing precision of output voltage control deteriorates
Solution Approach 1:
The patent implements a feedback control mechanism where the control unit continuously monitors the output voltage and compares it with the target voltage, then adjusts the thyristor conduction angle accordingly. This closed-loop feedback system enables precise output voltage control without significantly increasing device complexity, as the control unit integrates sensing and processing functions into a unified control architecture.
Solution Approach 2:
The patent dynamically adjusts the thyristor conduction angle based on the differential voltage between output and target voltages. The control unit modifies the firing angle in real-time according to load conditions and voltage requirements, transforming the static rectifier circuit into a dynamic voltage control system that maintains precision across varying operating conditions.
2Power
If the thyristor conduction angle is increased to raise output voltage, then the output voltage increases, but the power conversion efficiency deteriorates
Solution Approach 1:
The control unit dynamically optimizes the thyristor conduction angle to achieve the minimum required output voltage rather than using fixed or excessive conduction angles. This dynamic adjustment minimizes reactive power consumption and reduces energy losses in the rectifier circuit, maintaining high power conversion efficiency while delivering the required output voltage.
Solution Approach 2:
The patent changes the conduction angle parameter of the thyristor based on the differential voltage between output and target voltages. By precisely controlling this parameter, the system achieves the desired output voltage with minimal energy loss, avoiding the inefficiencies associated with overly conservative or fixed conduction angle settings.
3Device complexity
If simple voltage control methods are used, then the device complexity is reduced, but the stability of output voltage deteriorates
Solution Approach 1:
The control unit employs feedback control by continuously monitoring output voltage and adjusting the thyristor conduction angle in response to voltage deviations. This feedback mechanism automatically compensates for voltage fluctuations caused by load changes or generator speed variations, ensuring stable output voltage without requiring complex external stabilization circuits.
4Ease of operation
If the power converter operates without precise voltage control, then the ease of operation is improved, but the reliability of connected devices deteriorates
Solution Approach 1:
The control unit operates autonomously, automatically detecting voltage conditions and adjusting the thyristor conduction angle without user intervention. The system self-regulates to maintain precise output voltage, protecting connected devices from voltage instability while requiring no manual adjustment or complex user interaction, thus maintaining ease of operation alongside high reliability.
Data Source
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AI summary
A power converter that converts an AC power outputted from a generator into a DC power and supplies it to a battery (load). The power converter includes a thyristor (switch unit) connected between an output unit of the generator and the battery (load); and a gate control unit (control unit) for generating a triangle wave voltage having a constant peak voltage corresponding to each cycle of the AC power outputted from the generator, generating a differential voltage between the voltage supplied to the load via the switch unit and a predetermined target voltage, and controlling the conductive state of the switch unit based on the triangle wave voltage and the differential voltage.