Switching Circuit Charge Storage Rectifier Ringing Reduction
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Solution Overview
Problem
High-frequency power converters experience significant ringing and energy loss due to switching operations, which existing technologies have not adequately addressed, leading to inefficiencies and potential damage to switching devices.
Innovation Solution
A circuit design incorporating a switching element, a charge storage element, and rectifying elements, where the charge storage element captures and releases charge during switching operations, and rectifying elements help reduce ringing by managing voltage fluctuations, thereby improving efficiency and reducing energy dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-frequency switching is used in power converters, then power conversion efficiency is improved, but ringing and energy loss increase
Solution Approach 1:
The patent captures the harmful ringing energy generated during high-frequency switching and converts it into useful energy storage. The circuit recovers the oscillating energy that would normally be dissipated as heat or electromagnetic interference, storing it in capacitors for later use, thereby transforming a detrimental effect into a beneficial resource.
Solution Approach 2:
The patent implements energy recovery by capturing and storing the ringing energy that occurs during switching operations. Instead of allowing this energy to be wasted, the circuit recovers it through rectifying elements and stores it in charge storage elements, making it available for subsequent switching cycles and reducing overall energy loss.
2Speed
If high-frequency switching is used in power converters, then power conversion speed is improved, but ringing at switching nodes increases
Solution Approach 1:
The patent transforms the harmful ringing phenomenon into a useful energy source. By capturing the oscillating voltage and current during ringing events, the circuit converts this electromagnetic interference into storable electrical energy, eliminating the harmful effects while preserving the high-speed switching performance.
Solution Approach 2:
The patent introduces intermediate energy storage elements (capacitors) and rectifying elements as mediators between the switching node and the load. These intermediaries capture and manage the ringing energy, preventing it from causing harmful effects while allowing the high-frequency switching to continue uninterrupted.
3Device complexity
If conventional switching circuits are used, then device simplicity is maintained, but energy recovery during switching is insufficient
Solution Approach 1:
The patent merges the switching function with energy recovery and storage functions into a single integrated circuit. By combining the switching element, rectifying elements, and charge storage elements into one cohesive structure, the design achieves energy recovery without requiring separate complex subsystems, thus maintaining relative simplicity while improving energy efficiency.
Solution Approach 2:
The patent creates a multi-functional circuit that simultaneously performs switching, energy capture, energy rectification, and energy storage. This universal circuit design eliminates the need for separate energy recovery circuits, reducing overall system complexity while achieving comprehensive energy management during switching operations.
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 proposed circuit design enhances efficiency by up to 2% and reduces ringing, allowing for quicker stabilization of the switching node voltage and enabling the use of switching devices with lower breakdown voltages, while capturing and releasing energy to improve overall performance.
Implementation Method 1
a first charge storage element having a first terminal and a second terminal
Implementation Method 2
a first rectifying element having an anode and a cathode... a second rectifying element having an anode and a cathode
Data Source
AI summary
A circuit can include a switching element, a charge storage element, a first rectifying element, and a second rectifying element. A current-carrying electrode of the switching element and a terminal of the charge storage element are coupled to each other. The other terminal of the charge storage element, an anode of the first rectifying element, and a cathode of the second rectifying element are coupled to a floating node. A cathode of the first rectifying element is coupled to an input terminal, and an anode of the second rectifying element is coupled to a reference node. In a particular embodiment, the circuit can be part of a power converter. The charge storage element can help to capture charge during a switching operation and release the captured charge during a subsequent switching operation. The charge storage element can help the circuit to operate more efficiently.