Intelligent Gate Drive Unit with Analog Measuring Circuit

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Solution Overview

Problem

Power modules controlled close to design limits have shorter lifetimes due to limited overload capabilities, and existing technologies rely on unnecessary safety margins, which can reduce efficiency and increase costs.

Innovation Solution

An intelligent gate drive unit with a gate driver and analog measuring circuit that measures switch voltage and current in real-time, allowing for precise control and diagnostics of semiconductor switches, enabling reduced safety margins and improved operational efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If safety margins are increased to protect power modules operated close to design limits, then reliability is improved, but productivity decreases due to reduced operational efficiency

Engineering Contradiction:

Improvepower module reliabilityVSAvoidoperational efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent implements real-time feedback through analog measuring circuits that continuously monitor switch voltage and current. This feedback enables the control system to adjust operation dynamically, allowing power modules to operate closer to design limits while maintaining reliability through active monitoring and protection.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces traditional mechanical protection methods (physical safety margins) with electronic monitoring and control systems. The analog measuring circuits and intelligent gate drive units provide electronic protection, enabling more precise control and allowing operation closer to design limits without compromising reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If analog measuring circuits are added to gate drive units for real-time monitoring, then measurement precision is improved, but device complexity increases

Engineering Contradiction:

Improveswitch voltage measurement precisionVSAvoidgate drive unit complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent merges the measuring circuits with the gate drive unit, integrating voltage and current measurement functions directly into the existing gate drive architecture. This integration reduces overall system complexity compared to separate monitoring systems while providing precise real-time measurements of switch voltage and current.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The gate drive unit is designed with multi-functionality, serving both as a control device and a measurement device. The analog measuring circuits within the gate drive unit perform multiple functions including voltage measurement, current measurement, and fault detection, reducing the need for separate dedicated monitoring components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS9899999B2Gate drive unit with analog measuring circuit

Publication Date: 2018.02.20 K B ELECTRONICS INC

AI summary

An intelligent gate drive unit and related method for controlling one or more semiconductor switches of one or more power modules, the intelligent gate drive unit comprises at least a gate driver and an analog measuring circuit, wherein the gate driver facilitates control of the one or more semiconductor switches and wherein the analog measuring circuit facilitates measuring the switch voltage when the one or more semiconductor switches are in a conducting mode.