Inverter Branch Driver Integration for Frequency and Volume
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Solution Overview
Problem
Existing inverter systems have limited maximum functioning frequency and immunity to magnetic fields due to the separation of command systems and inverter branches, which leads to increased volume and parasitic oscillations.
Innovation Solution
Integration of the command system and inverter branch on a single semi-conductive substrate, using synchronous and phased input signals processed by logic gates to minimize time differences and reduce parasitic inductances, along with optical couplers for electrical insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the command system and inverter branch are separated into different casings, then electrical insulation and electromagnetic compatibility are improved, but the maximum functioning frequency is limited and volume increases
Solution Approach 1:
The patent integrates the command system and inverter branch onto a single semi-conductive substrate, merging previously separate systems into one unified structure. This integration eliminates the need for external casings and galvanic insulation while enabling higher functioning frequencies through reduced parasitic inductances and shorter signal paths.
2Speed
If the command system and inverter branch are integrated on one same chip, then volume is reduced and functioning frequency is improved, but electrical insulation becomes difficult to achieve
Solution Approach 1:
The patent segments the integrated circuit into distinct functional zones: a first area for the inverter branch with high-side and low-side transistors, and a second area for the command system with driving circuits. This spatial segmentation allows both systems to coexist on the same substrate while maintaining electrical insulation through careful layout and isolation techniques.
3Reliability
If external galvanic insulation is used, then electrical insulation is achieved, but volume increases and integration becomes difficult
Solution Approach 1:
The patent merges the electrical insulation function directly into the substrate structure through localized isolation techniques within the integrated circuit, eliminating the need for separate external galvanic insulation components. This approach reduces volume and simplifies integration while maintaining the required electrical insulation between the inverter branch and command system.
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 integration enhances the functioning frequency, reduces volume, and improves high-frequency performance by minimizing propagation delays and parasitic oscillations, while maintaining electrical insulation and reducing production costs.
Implementation Method 1
optical couplers for electrical insulation
Data Source
AI summary
An electronic circuit is provided, including, on one same substrate, an inverter branch formed by high side and low side transistors, and the drivers of the high side and the low side transistors. The drivers include logic gates configured to receive one same PWM input signal and to generate two alternated command signals sent to the high side and the low side transistors. An inverter system is also provided, including the electronic circuit and laser optocouplers configured to electrically insulate the electronic circuit of a controller delivering a pulse width modulation (PWM) input signal and a main supply electrically supplying the drivers.