Motor Controller Plastic Press Blocks Chip Protection
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Solution Overview
Problem
Motor controllers face issues with control chip damage and deformation due to pressure from metal press strips, and fail to withstand voltage during short circuit tests.
Innovation Solution
A motor controller design using plastic press blocks that securely and flexibly attach the control chip to the control box, with insulation layers and a silicon case to prevent damage and enhance insulation, along with cooling fins for heat dissipation and a sealant with inclined plane for water drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal press strip is used to attach the control chip to the control box, then the control chip can be securely fixed, but the control chip is easily damaged or deformed due to pressure from the metal press strip
Solution Approach 1:
The patent introduces a plastic press block as an intermediary component between the metal press strip and the control chip. The plastic press block has good electrical insulation performance and appropriate hardness, allowing it to transmit pressing force while protecting the control chip from direct metal contact and excessive pressure, thus resolving the contradiction between secure fixing and chip integrity
Solution Approach 2:
The patent uses a composite structure combining metal press strip (for structural strength) with plastic press block (for protection and insulation). This composite material approach allows the metal component to provide mechanical strength while the plastic component provides protection against damage and deformation, achieving both secure fixing and chip integrity
2Strength
If a metal press strip is used to attach the control chip, then the control chip can be fixed in place, but the contact position fails to pass the withstand voltage test during short circuit experiments
Solution Approach 1:
The plastic press block serves as an electrical insulation intermediary between the conductive metal press strip and the control chip. This plastic intermediary prevents direct electrical contact between the metal and chip, blocking the path for voltage breakdown and electrical discharge during short circuit conditions, thus resolving the contradiction between mechanical fixing and electrical insulation
Solution Approach 2:
The plastic press block creates an electrically inert environment between the metal press strip and control chip by providing high electrical resistance. This inert electrical environment prevents harmful electrical discharge and voltage breakdown, allowing the metal press strip to provide mechanical support without compromising electrical safety
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 provides a reliable, long-lasting motor controller with improved insulation, heat dissipation, and waterproofing, ensuring the control chip is protected from deformation and voltage stress, while maintaining simple installation and accurate positioning.
Implementation Method 1
The contact between the plastic press blocks and the control chip is flexible, so that damage or deformation is prevented during the installation of the control chip
Implementation Method 2
Insulation layers are disposed on outer surfaces of the plastic press strip, the plastic press blocks, and the first press strip, respectively
Implementation Method 3
a plurality of cooling fins is disposed on an outer wall of the control box corresponding to an outer side of the control chip
Implementation Method 4
a plurality of cooling fins is disposed on an outer wall of the control box corresponding to an outer side of the control chip
Implementation Method 5
A top face of the sealant is an inclined plane. A plurality of first drip holes is disposed on the inner wall of the control box at a bottom part of a lower side of the inclined plane
Data Source
AI summary
A motor controller, including: a control box, a control circuit board, a first press strip, a control chip, and a plurality of plastic press blocks. The control box includes: an inner wall, a bottom, and a cavity formed by the inner wall and the bottom. The control circuit board is disposed on the bottom of the control box. The control chip is disposed on an outer edge of a top face of the control circuit board. The plastic press blocks are disposed in a middle of an end face of the first press strip. Two ends of the first press strip and the inner wall of the control box are assembled together. The control chip is pressed on the inner wall of the control box via the plastic press blocks.