Power-HIL Interface Control for Impedance-Free Stable Simulation

Solution Overview

Problem

Current power-hardware-in-the-loop simulation systems are inconvenient to use and prone to instability due to impedance mismatches between the device under test and the power system, requiring users to know the impedance of the device under test for stability, which is not a real-world issue.

Innovation Solution

A power-hardware-in-the-loop simulation system comprising an amplifier, sensing module, optimizer, and control module that automatically adjusts the reference current value to minimize voltage differences between the device under test and the real-time simulator, eliminating the need for users to know the impedance of the device under test.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If users manually configure impedance parameters for stability, then system stability can be maintained under specific conditions, but the system becomes inconvenient to use and requires specialized knowledge

Engineering Contradiction:

Improvesystem stabilityVSAvoiduser convenience

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The power interface system automatically detects impedance parameters and configures itself without user intervention. The controller measures the actual impedance of the device under test and autonomously adjusts the equivalent impedance of the power system to ensure stability, eliminating the need for users to manually input impedance values or have specialized knowledge about impedance matching.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system continuously monitors the actual impedance of the device under test through sensing circuits and uses this feedback information to dynamically adjust the equivalent impedance of the power system. This closed-loop control ensures that the system maintains stability by adapting to changes in the device under test's impedance characteristics in real-time.

Inventive Principle:

Principle #23Feedback

2Reliability

If impedance ratio constraints are enforced, then system stability is maintained, but the system becomes complex and requires users to know impedance values which is not a real-world issue

Engineering Contradiction:

Improvesystem stabilityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The power interface system automatically detects impedance parameters and configures itself without user intervention. The controller measures the actual impedance of the device under test and autonomously adjusts the equivalent impedance of the power system to ensure stability, eliminating the need for users to manually input impedance values or have specialized knowledge about impedance matching.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system introduces an intelligent controller as an intermediary between the device under test and the power system. This controller acts as a mediator that automatically handles impedance matching and stability control, shielding users from the complexity of impedance calculations and system configuration while ensuring stable operation.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If automatic impedance detection and adjustment is implemented, then ease of operation improves and system becomes more versatile, but the control system becomes more complex

Engineering Contradiction:

Improveuser convenienceVSAvoidcontrol system complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The power interface system automatically detects impedance parameters and configures itself without user intervention. The controller measures the actual impedance of the device under test and autonomously adjusts the equivalent impedance of the power system to ensure stability, eliminating the need for users to manually input impedance values or have specialized knowledge about impedance matching.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system continuously monitors the actual impedance of the device under test through sensing circuits and uses this feedback information to dynamically adjust the equivalent impedance of the power system. This closed-loop control ensures that the system maintains stability by adapting to changes in the device under test's impedance characteristics in real-time.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20260063713A1Power-hardware-in-the-loop simulation system and method and non-transitory computer readable medium

Publication Date: 2026.03.05 NAT TAIWAN UNIV OF SCI & TECH

AI summary

The present disclosure provides a power-hardware-in-the-loop simulation system, which includes an amplifier, a sensing module, an optimizer and a control module. The amplifier is electrically connected to the device under test, the optimizer is electrically connected to the sensing module, and the control module is electrically connected to the optimizer and the amplifier. The sensing module senses a voltage value of the device under test, and the optimizer obtains a voltage value of the equivalent current source model of a real-time simulator associated with the device under test, and then calculates the reference current value based on a voltage difference between the voltage value of the device under test and the voltage value of the equivalent current source model of the real-time simulator associated with the device under test. The control module controls the amplifier based on the reference current value.