Multi-Channel AC Conversion Circuit for Leakage-Protected Outputs
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Solution Overview
Problem
Current alternating current conversion circuits are limited by their ability to provide only single outputs of AC or DC, and thyristor-based AC conversion circuits cannot be used with devices that have leakage protection, leading to poor user experiences.
Innovation Solution
A multi-channel alternating current conversion circuit is proposed, incorporating a thyristor voltage reduction circuit, a no-load freewheeling voltage stabilizing circuit, and AC-AC and AC-DC voltage reduction units, which enable multiple power outputs and safe operation with leakage protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a thyristor voltage reduction circuit is used to achieve AC output, then AC voltage reduction functionality is improved, but compatibility with devices having leakage protection deteriorates
Solution Approach 1:
The patent divides the AC conversion function into two separate modules: an AC-AC conversion unit with thyristor voltage reduction circuit for voltage reduction, and an AC-AC voltage reduction unit for direct AC output. This segmentation allows each module to serve specific functions, enabling compatibility with leakage protection devices while maintaining voltage reduction capability.
Solution Approach 2:
The patent introduces an AC-AC voltage reduction unit as an intermediary solution that provides AC output without using thyristor circuits. This intermediary module enables devices with leakage protection to function normally by providing a compatible AC output path that doesn't trigger leakage protection mechanisms.
2Device complexity
If a single-output AC or DC conversion circuit is used, then circuit simplicity is improved, but functionality and adaptability to different devices deteriorate
Solution Approach 1:
The patent designs a power supply apparatus that integrates multiple conversion units (AC-AC conversion unit, AC-AC voltage reduction unit, and AC-DC voltage reduction unit) to provide universal support for different device types. The system can simultaneously provide AC and DC outputs with different voltage levels, making it adaptable to various electronic devices with different power requirements.
Solution Approach 2:
The patent implements dynamic output selection capability where the system can adaptively switch between different output modes (AC or DC) and voltage levels based on the connected device's requirements. This dynamic adaptability allows a single circuit to serve multiple functions without requiring complex manual configuration.
3Power
If thyristor voltage reduction circuit is used under no-load conditions, then voltage reduction is achieved, but voltage stability deteriorates
Solution Approach 1:
The patent incorporates a no-load freewheeling voltage stabilizing circuit that is pre-configured to activate under no-load conditions. This circuit includes a freewheeling diode and RC voltage reduction circuitry that stabilizes the output voltage before any load is connected, preventing voltage fluctuations that would otherwise occur during transitions.
Solution Approach 2:
The patent uses a freewheeling diode and RC circuit to provide beforehand cushioning for voltage stabilization. When the thyristor circuit operates under no-load conditions, these components absorb and smooth out voltage variations, cushioning against potential instability and ensuring continuous stable voltage output.
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 solution provides multiple power outputs, enhancing functionality and meeting diverse electronic device requirements, while ensuring stable voltage waveforms under no-load conditions, allowing devices with leakage protection to function normally without triggering protection mechanisms.
Implementation Method 1
the no-load freewheeling voltage stabilizing circuit being configured to keep a voltage of the first AC output terminal stable through resistor-capacitor voltage reduction and voltage division under no-load conditions
Implementation Method 2
the no-load freewheeling voltage stabilizing circuit being configured to keep a voltage of the first AC output terminal stable through resistor-capacitor voltage reduction and voltage division under no-load conditions
Implementation Method 3
an AC-AC conversion unit including a thyristor voltage reduction circuit
Implementation Method 4
an AC-DC voltage reduction unit, the AC input terminal being connected to an input terminal of the AC-DC voltage reduction unit, and the AC-DC voltage reduction unit being configured to convert the AC voltage from the input terminal into a DC voltage and output the DC voltage
Data Source
AI summary
A multi-channel alternating current conversion circuit, a power supply apparatus and an electronic device are disclosed. The multi-channel alternating current conversion circuit includes an AC input terminal, an AC-AC conversion unit, an AC-AC voltage reduction unit and an AC-DC voltage reduction unit. The AC-AC conversion unit includes a thyristor voltage reduction circuit, a no-load freewheeling voltage stabilizing circuit and a first AC output terminal. The AC input terminal is connected to an input terminal of the thyristor voltage reduction circuit and an input terminal of the no-load freewheeling voltage stabilizing circuit. An output terminal of the thyristor voltage reduction circuit and an output terminal of the no-load freewheeling voltage stabilizing circuit are connected to an output terminal of the first AC output terminal. The no-load freewheeling voltage stabilizing circuit keeps a voltage of the first AC output terminal stable through resistor-capacitor voltage reduction and voltage division under no-load conditions.