IGBT Temperature Deviation Correction via Gate Board Integration
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Solution Overview
Problem
Existing motor drive systems for IGBT modules face challenges in correcting temperature deviations for each switching element, leading to increased circuit complexity and cost, as well as a lack of consideration for product aging, which affects temperature deviation correction.
Innovation Solution
A motor drive system with a correction function for IGBT module temperature deviations, which includes a gate board that detects and corrects temperature deviations using sensing information from integrated circuit units, calculates final temperature information, and optimizes OC detection levels without the need for additional control elements, thereby reducing manufacturing time and circuit complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate control elements (such as micom) are added to correct temperature deviation of IGBT module, then temperature sensing precision is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the temperature deviation correction function into the existing gate board by integrating temperature sensing diodes with IGBT elements and using integrated circuit units to process temperature signals. This eliminates the need for separate control elements like micom while achieving accurate temperature correction, directly resolving the contradiction between measurement precision and device complexity
Solution Approach 2:
The gate board is designed to perform multiple functions: it serves as both the control interface for IGBT elements and the temperature sensing/correction system. The integrated circuit units handle both switching control and temperature deviation correction, making the gate board a multi-functional component that reduces overall system complexity while maintaining precise temperature measurement
2Measurement precision
If separate control elements are added for temperature correction, then temperature deviation correction is improved, but manufacturing time and cost increase
Solution Approach 1:
By combining temperature sensing diodes with IGBT elements in the same module and integrating the correction logic into the gate board's existing integrated circuit units, the patent eliminates separate control elements. This integration simplifies the manufacturing process, reduces assembly steps, and lowers production costs while maintaining accurate temperature deviation correction
Solution Approach 2:
The IGBT module performs its own temperature sensing and deviation correction through integrated sensing diodes and gate board processing. Each IGBT element has its own temperature sensing capability, and the gate board automatically corrects deviations without requiring external control elements, making the system self-sufficient and easier to manufacture
3Device complexity
If traditional temperature sensing is used without correction, then device complexity is reduced, but temperature measurement accuracy deteriorates due to product aging
Solution Approach 1:
The patent implements preliminary calibration by measuring temperature deviations during the manufacturing process and storing correction values in the gate board's memory. This preliminary action compensates for aging effects before the product is put into service, maintaining measurement accuracy without adding complex real-time correction circuits
Solution Approach 2:
The system continuously monitors temperature through sensing diodes and compares actual temperatures with reference temperatures. The gate board calculates deviation values and applies real-time feedback correction to maintain accurate temperature measurements, compensating for aging effects without requiring overly complex circuitry
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 solution effectively corrects temperature deviations for each switching element of the IGBT module, optimizing performance and enhancing product reliability by eliminating the need for separate control elements and accounting for product aging, resulting in economical and efficient controller manufacturing.
Implementation Method 1
a temperature sensing unit detecting the sensing temperature information from a sensing diode located around each of the IGBT elements
Data Source
AI summary
A motor drive system with a correction function of a temperature deviation of an IGBT module is provided. The system may include: a gate board configured to detect a plurality of sensing temperature information by sensing the IGBT module, acquire a difference value between maximum temperature information among the plurality of sensing temperature information and at least one sensing temperature information, and correct and output the at least one sensing temperature information by using the acquired difference value.