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Selecting System Components for a Power Hardware-in-the-Loop System

Power Hardware-in-the-Loop (PHIL) simulation is an advanced version of Hardware-in-the-Loop (HIL) simulation. It enables real-time simulation environments to exchange not only low-voltage, low-current signals but also high power signals and loads needed by the Devices under Test (DUT). To achieve this, power amplifiers are used to connect high-power DUTs with the low-level simulator inputs and outputs, ensuring proper feedback loop closure. The selection of power amplifiers is based on their performance in closed-loop systems and their ability to generate and absorb power.

PHIL simulation goes a step further by allowing the simulation of higher power flows between DUTs and with the simulated electric circuit running on the simulator. This capability enables engineers to test multiple systems, such as power converters, generators, motors, and PV loads. Additionally, PHIL provides high-fidelity simulation, offering greater flexibility and safety compared to traditional analog benches and dynamometers.

Download the whitepaper below on how to select the key components for a PHIL system.