Power Conversion Circuit Standby Power Reduction
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Solution Overview
Problem
Conventional power conversion circuits for smart control panels have complicated structures and high power consumption during standby operation, necessitating an improvement.
Innovation Solution
A power conversion circuit with a power harvesting module, switching module, and sampling module that controls the switch component to be turned off during positive half cycles of the AC power source, with extended on-time in one negative half cycle to reduce conduction loss, utilizing a MOSFET switch and diode configuration, and incorporating comparison units for voltage control and zero-crossing detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If conventional power conversion circuits are used, then power conversion function is achieved, but structure becomes complicated and power consumption increases during standby operation
Solution Approach 1:
The patent extracts and eliminates unnecessary components from conventional power conversion circuits. By removing redundant switching elements and simplifying the circuit topology, the design achieves lower standby power consumption and reduced structural complexity while maintaining essential power conversion functionality.
Solution Approach 2:
The patent inverts the conventional switching strategy by turning off the switch during positive half cycles and keeping it on during negative half cycles. This reverse operation mode reduces unnecessary switching losses and standby power consumption, directly addressing the technical contradiction between power efficiency and functional performance.
2Loss of energy
If switch component is turned on continuously, then power conversion function is maintained, but conduction loss increases
Solution Approach 1:
The patent implements periodic switching action where the switch component is turned off during positive half cycles and turned on during negative half cycles of the AC input. This periodic operation reduces continuous conduction loss while maintaining reliable power conversion through controlled intermittent operation, resolving the contradiction between energy loss and system reliability.
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 reduces conduction loss and power consumption by optimizing switch operation, leading to a more efficient and simplified power conversion circuit design.
Implementation Method 1
a power harvesting module, coupled to the first grid interface, the power harvesting module comprising a first diode and a first charging capacitor coupled to the first diode, the power harvesting module receiving the AC power source from the first grid interface to generate an output voltage
Data Source
AI summary
A power conversion circuit and a method thereof, wherein the power conversion circuit includes a first grid interface and a second grid interface coupled to an AC power source, a power harvesting module, a sampling module and a switching module. The power harvesting module is coupled to the first grid interface, and the power harvesting module includes a first diode and a first charging capacitor coupled to the first diode. The power harvesting module receives the AC power source from the first grid interface to generate an output voltage. The switching module includes a switch component controlled by the sampling module. The sampling module is coupled to the power harvesting module and acquires a sampling voltage. The sampling module controls the switch component to be turned off during at least a period of time within positive half cycles of the AC power source.