Single Live Line Charging Circuit Buck Control
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Solution Overview
Problem
Traditional single live line power supply systems are complicated by the use of magnetic latching relays, leading to increased costs and component complexity, which restricts the intelligent upgrade of home appliance control systems.
Innovation Solution
A single live line charging circuit with a buck circuit configuration, utilizing switches and inductors to manage charging states based on voltage thresholds, eliminating the need for relays and simplifying the system structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If magnetic latching relay is used to control the charging circuit, then the load capacity and drive loss are improved, but the device complexity and cost increase
Solution Approach 1:
The patent replaces the magnetic latching relay (mechanical/electromagnetic system) with an electronic control circuit comprising switching elements (MOSFETs or similar), control electrodes, and feedback circuits. This substitution eliminates the mechanical moving parts and magnetic latching mechanism while achieving the same power control function through electronic switching, thereby reducing device complexity and cost while maintaining load capacity.
Solution Approach 2:
The patent extracts the control function from the magnetic latching relay and implements it separately through a dedicated control circuit with switching elements. The relay structure is completely removed, and its control function is realized through electronic components that can be integrated into the circuit board, reducing peripheral components and overall system complexity.
2Loss of energy
If magnetic latching relay is used to control the charging circuit, then the drive loss is reduced, but the component count and cost increase
Solution Approach 1:
The patent merges the control function previously performed by the magnetic latching relay into the existing circuit board layout. The switching elements (Q1, Q2, Q3, Q4) and their control circuits are integrated directly into the power supply circuit, eliminating the need for separate relay components and reducing the overall component count while maintaining efficient power control.
Solution Approach 2:
The control circuit with switching elements serves multiple functions: it controls the charging state of the capacitor, manages power distribution to sensor units, and can be extended to control other loads. This multi-functional electronic control system replaces the single-function magnetic latching relay, reducing the need for additional components.
3Reliability
If traditional wall mechanical switch pattress with neutral line loop is used, then the power supply is stable, but the intelligent upgrade capability is restricted
Solution Approach 1:
The patent implements dynamic control of the power supply system through electronic switching elements that can be programmably controlled. The control circuit can dynamically adjust the charging state based on voltage thresholds and control signals, enabling intelligent features such as remote control, scheduling, and sensor integration, while maintaining stable power supply through controlled capacitor charging.
Solution Approach 2:
The patent changes the control parameter from mechanical switch position to electronic voltage control. By monitoring voltage at the control electrode of switching elements and comparing it with reference voltages, the system achieves precise control over power distribution, enabling intelligent upgrades while maintaining power supply stability through regulated capacitor charging.
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 simplifies the application of single live line power, reduces component count, and enables intelligent control, lowering costs and enhancing the upgrade of traditional equipment to intelligent control systems.
Implementation Method 1
The first switch, the first conduction element and the first inductor constitute a buck circuit
Data Source
AI summary
A control method of a single live line charging circuit, a control circuit of a single live line charging circuit, and a single live line charging circuit are provided. The single live line charging circuit includes a first switch, a first conduction element, a first inductor, a second switch, a second conduction element, a third switch, a first input end and a second input end; the first input end is connected to a first end of the first switch through the second conduction element; the first switch, the first conduction element and the first inductor constitute a buck circuit; the first input end is connected to a reference ground through the second switch, the second input end is connected to the reference ground through the third switch, and an alternating current input is connected to the first input end through a load circuit.