Magnetic Device Layout for Power Conversion Module
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Solution Overview
Problem
Conventional electronic devices face inefficiencies in power conversion due to long electric trace paths between the central processing unit and power conversion module, leading to high parasitic resistance and conduction loss, and require numerous output capacitors to stabilize voltage, increasing cost and volume.
Innovation Solution
A magnetic device with M middle legs and 2N lateral legs, along with 2N first windings and a second winding, is integrated into a power conversion module with a circuit board and adapter board design that reduces trace length and uses PWM control signals with varied phase differences to minimize AC current components, allowing fewer capacitors while maintaining voltage stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the power conversion module and central processing unit are disposed on the same side of the system board, then the installation is simpler, but the electric trace path becomes long causing high parasitic resistance and conduction loss
Solution Approach 1:
The patent transitions from a two-dimensional planar layout (same side mounting) to a three-dimensional vertical layout (opposite sides mounting). The power conversion module is mounted on the first surface of the system board while the central processing unit is mounted on the second surface, utilizing the vertical dimension to reduce the horizontal distance between components and thereby reducing parasitic resistance and conduction loss.
2Loss of energy
If the power conversion module is moved to the opposite surface of the system board to reduce volume and conduction loss, then power efficiency improves, but the number of output capacitors must be increased to stabilize voltage
Solution Approach 1:
The patent combines multiple functions into the magnetic device structure. The magnetic device not only provides magnetic shielding and inductance but also serves as a mounting platform for output capacitors. By integrating the capacitor mounting function into the magnetic device, the patent reduces the number of separate capacitor mounting positions needed on the system board while maintaining voltage stability.
Solution Approach 2:
The magnetic device is designed with multi-functionality: it provides magnetic shielding, stores energy through its inductance, and serves as a mounting structure for output capacitors. This universal design allows the magnetic device to fulfill multiple roles, reducing the overall component count and simplifying the power conversion module architecture.
3Device complexity
If multiple switching assemblies generate control signals with identical phase difference, then the control is simpler, but the AC components become too large requiring more output capacitors
Solution Approach 1:
The patent changes the phase difference parameter between control signals generated by different switching assemblies. Instead of using identical phase differences, the patent employs varied phase differences (e.g., 0 degrees, 60 degrees, 120 degrees, or 180 degrees) to reduce AC current components. This parameter optimization allows for fewer output capacitors while maintaining 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 reduces conduction loss and the number of output capacitors needed, enhancing power conversion efficiency and reducing the overall cost and volume of the power conversion module.
Implementation Method 1
The magnetic device includes M middle legs, 2N lateral legs, 2N first windings and a second winding... Each of the 2N first windings is wound around the corresponding lateral leg for at least one turn. The second winding is wound around the M middle legs and formed as a closed loop.
Implementation Method 2
The magnetic device includes M middle legs, 2N lateral legs, 2N first windings and a second winding... The 2N lateral legs are arranged around the M middle legs
Data Source
AI summary
A power conversion module is disclosed. The power conversion module includes a circuit board, an adapter board, a first component and a second component. The second surface of the circuit board includes a concave region. The circuit board has four sidewalls. The first surface of the adapter board is attached to the second surface of the circuit board. The first surface of the adapter board includes a component disposing region, and the component disposing region is corresponding to the concave region. The first component is disposed in the concave region. A height of the first component is less than or equal to a depth of the concave region. The second component is disposed in the component disposing region and accommodated in the corresponding one of the concave region. A height of the second component is less than or equal to the depth of the concave region.