Interleaved Power Supply Circuit with Magnetically Coupled Reactors
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Solution Overview
Problem
Conventional power supply circuits fail to adequately reduce noise frequencies that are even multiples of the switching frequency, leading to increased noise propagation and potential circuit malfunctions.
Innovation Solution
The power supply circuit incorporates a bypass circuit with magnetically coupled reactors and capacitors, utilizing interleaving switching control to cancel out noise frequencies, including those equal to odd multiples and specific even multiples of the switching frequency, through a carefully designed configuration that adjusts the frequency of ripple components using electrical element constants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional power supply circuit is used, then circuit size and complexity are kept minimal, but noise reduction capability is insufficient
Solution Approach 1:
The bypass capacitor serves multiple functions: it filters even multiple frequency noise components, stabilizes voltage during switching transitions, and works synergistically with the interleaved switching control. This multi-functionality allows the circuit to achieve enhanced noise reduction without proportionally increasing complexity.
Solution Approach 2:
The invention optimizes the bypass capacitor's parameters (capacitance value, placement location) to achieve maximum noise reduction effectiveness. By carefully selecting and adjusting these parameters, the system achieves superior noise filtering performance while maintaining reasonable circuit complexity levels.
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
This configuration effectively reduces noise components with frequencies equal to odd multiples and specific even multiples of the switching frequency, minimizing normal mode noise propagation and enhancing circuit stability without increasing the circuit size or complexity.
Implementation Method 1
the first reactor (Lr1) and the first inductor (Lc1) are magnetically coupled to each other
Implementation Method 2
the second reactor (Lr2) and the second inductor (Lc2) are magnetically coupled to each other
Implementation Method 3
a bypass capacitor (Cb1)
Data Source
Figure 1
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AI summary
Provided is a power supply circuit in which a first input terminal is connected to a first end of a first reactor, the first input terminal is connected to a first end of a second reactor, a first end of a first inductor is connected the first input terminal, a second end of the first inductor is connected to a first end of a second inductor, a second end of the second inductor is connected to a first end of a bypass capacitor, a second end of the bypass capacitor is connected to a second output terminal, the first reactor and the first inductor are magnetically coupled to each other, the second reactor and the second inductor are magnetically coupled to each other, and a control circuit performs switching control over first and second switching elements, using an interleaving method.