Controller Electrical Assembly With Stacked Terminals for Low Stray Inductance
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Solution Overview
Problem
High stray inductance in electrical circuits due to the connection of support capacitors and power devices leads to loss and signal attenuation.
Innovation Solution
An electrical device assembly is designed with first and second electrical devices, where their positive and negative electrode connection terminals are stacked and mated in intersecting directions, forming an inductive loop that cancels magnetic fields, thereby reducing stray inductance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If support capacitor and power device are electrically connected using conventional layout, then electrical connection is achieved, but stray inductance becomes high
Solution Approach 1:
The patent transitions from a planar connection layout to a three-dimensional stacked configuration. The first and second electrical devices are arranged in layers with their connection terminals vertically aligned and mated, creating a compact 3D structure that reduces the horizontal area enclosed by current loops, thereby minimizing stray inductance while maintaining reliable electrical connection.
Solution Approach 2:
The patent merges the connection terminals of the first and second electrical devices by making them mate with each other in the stacked configuration. The positive electrode connection terminal of the first device connects to the positive electrode connection terminal of the second device, and similarly for negative terminals, creating integrated current paths that reduce inductance.
2Reliability
If high stray inductance is present in circuit, then electrical connection is maintained, but loss and signal attenuation occur
Solution Approach 1:
By stacking electrical devices vertically and mating their connection terminals, the patent creates compact current loops with minimal enclosed area. This dimensional change from planar to vertical arrangement reduces the inductance of connection paths, thereby reducing energy loss and signal attenuation while preserving electrical connectivity.
Solution Approach 2:
The patent changes the geometric parameters of the connection layout by reducing the loop area through vertical stacking. This parameter change directly affects the inductance value (L = μ₀μᵣN²A/l), where reducing the enclosed area A reduces stray inductance, thereby minimizing energy loss and signal attenuation.
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
Reduces stray inductance, minimizing loss and signal attenuation in circuits by mutual cancellation of magnetic fields.
Implementation Method 1
both the first positive electrode connection terminal and the first negative electrode connection terminal are stacked along a second direction; and the first positive electrode connection terminal is mated with the second positive electrode connection terminal along the first direction, the first negative electrode connection terminal is mated with the second negative electrode connection terminal along the first direction
Data Source
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AI summary
A vehicle has a controller. The controller has an electrical device assembly. The electrical device assembly includes a first electrical device and a second electrical device. The first electrical device includes a first electrical device body, a first positive electrode connection terminal, and a first negative electrode connection terminal. The second electrical device includes a second electrical device body, a second positive electrode connection terminal, and a second negative electrode connection terminal. The first positive electrode connection terminal and the first negative electrode connection terminal are stacked along a second direction. The second positive electrode connection terminal and the second negative electrode connection terminal are stacked along the second direction. The first positive electrode connection terminal is mated with the second positive electrode connection terminal along a first direction. The first negative electrode connection terminal is mated with the second negative electrode connection terminal along the first direction.