eHS

eHS (electric hardware solver) is our FPGA-based power system and power electronics toolbox, designed to deliver unparalleled performance and high fidelity for real-time simulation. Its generic and reprogrammable electrical solver allows users to simulate circuits without the need for coding or advanced mathematical modeling. With its user-friendly interface, eHS streamlines hardware-in-the-loop (HIL) testing and supports advanced applications such as onboard chargers, solar inverters, power electronics, electric propulsion systems, and traveling wave relay testing.

Initially designed for MATLAB/Simulink™ users in 2012, eHS has since evolved to support several other industry-standard circuit editors, enabling flexible and accessible simulation workflows across diverse engineering environments.

Specification overview

Features	Capabilities
Simulation type	Fast EMT on FPGA
Targeted applications	High flexibility workflow for most power electronics applications
Supported component types	Switches, converters, machines, RLC, transformers, lines, sources, among others
Component capacity per FPGA	128 electrical sources 128 measurements 128 switching devices 344 states* Up to 4x 6-phase electrical machines Overall capability: Up to 21 converter models Up to 21 DER models 250-node grid @ 500 ns
Minimum time step	90ns
Maximum switching frequency	500kHz**
Maximum sampling rate	625ps with oversampling
Maximum number of parameters sets	Unlimited***
Compatible circuit editors	Simscape Specialized Power Systems (SPS), PLECS, PSIM and OPAL-RT Schematic Editor

*Estimated value. The maximum number of states depends on the number of inputs and outputs that need to be computed as well. There is no hardcoded limit.

**250kHz for resonant converter models and up to 500kHz for VSC applications. For higher requirements, slower than real-time modelling with parameter scaling is available, or a RT-XSG custom FPGA model implementation could be coupled with the eHS core.

*** Unlimited when using CPU buffered parameter sets. 512 when using FPGA buffered parameter sets.

They trust us

Demo

Bringing on-board charger (OBC) models to real-time

Watch a demo showcasing real-time simulation of an on-board charger (OBC) on an OP4610XG simulator. The OBC is composed of an AC-DC PFC converter and a DC-DC LLC resonant converter, with the power electronics devices being controlled using fast switching signals of up to 180 kHz.

Features

Redefining speed and accuracy of EMT real-time simulations

Our latest generation of eHS is faster and more efficient than ever before, allowing PWM switching frequencies as high as 500 kHz, supporting the most demanding of applications. Explore the highlights that will take your innovation to the next level.

High fidelity

Avoid instabilities and the manual struggles of artificially decoupling networks. Run up to 21 3-phase converter models (128 switches) or 250 grid nodes @ 500 ns on the same target.

Extra-high resolution

625 picosecond oversampling with interpolating converter models ensures the highest sampling resolution and accuracy available on the market, with switching frequencies as high as 500 kHz, a must for HIL simulation.

Ultra-low latency

eHS ensures ultra-low latency from PWM inputs to analog outputs—critical for accurate, high-speed HIL control and precise system response.

Scalable and co-simulation ready

Connect multiple FPGA-based simulators and offload larger system modeling to the CPU. Efficient parallelization lets the FPGA handle high-frequency switching while the CPU manages broader system dynamics.

Get started quickly

Our built-in schematic editor is an intuitive graphical interface designed to simplify the development of power electronics models. Fully integrated with OPAL-RT and NI real-time simulation platforms, it provides a seamless workflow from circuit design to real-time deployment.

Customize tests on the fly

Apply parameter sets to simulate different scenarios and fault conditions in a safe, controlled environment. Make on-the-fly changes without reloading or recompiling—saving valuable time and effort.

Advanced electric machines

Leverage optimized models of Permanent Magnet Synchronous Machine (PMSM – IPM – BLDC- SPM), Induction Machines (DFIG – DFIM – Squirrel Cage Induction Machine), and Switched Reluctance Machines.

Traveling wave relay testing

Test traveling wave relays with the only solution on the market that simulates grid models at sub-microsecond time steps, using constant parameter and frequency-dependent line models, and 10 MSPS analog outputs on cutting-edge FPGA hardware.

Testimonials

Trusted by industry leaders

Explore how leading institutions and organizations leverage eHS to achieve remarkable results.

See all success stories

We saw a strengthening of the development cycle through introducing all possible system variations such as grid impedances, harmonics, voltage variations in the control law design and tests before the final product—doing a thorough troubleshooting ahead of all this.

Moctar Coulibaly

R&D Platform Director at Valeo Powertrain Electrified Mobility

Learn how eHS helped Valeo succeed

We decided to use OPAL-RT amongst other choices of HIL systems because of their widespread research and industry use, fast and accurate emulation of the complex power electronics hardware and great customer support.

Akshat Yadav

Power Electronics Engineer at magniX

Learn more about electrifying flight with MagniX

Applications

Advancing your testing with eHS

eHS brings high-speed, FPGA-based simulation to a wide range of industries, including energy, power electronics, automotive, and aerospace. It supports applications such as onboard chargers, solar inverters, electric propulsion, motor drives, and protection relay testing. With its real-time capabilities, intuitive workflow, and unparalleled sampling resolution, eHS enables engineers and researchers to model complex power electronic systems, iterate rapidly, and validate designs with confidence.

Energy

Design, test, and optimize HVDC systems, renewables, and microgrids for grid modernization, stability, and protection—while supporting cybersecurity and resilience in increasingly digitalized power grids.

Power Electronics

Design, test, and optimize advanced power converters, motor drives, and control strategies with high-fidelity real-time simulation—ideal for applications in industrial automation and energy-efficient systems.

Automotive

Design, test, and optimize electric vehicle systems—including motor drives, battery management systems (BMS), electronic control units (ECUs), vehicle control units (VCU), and onboard chargers (OBC)

Aerospace

Design, test, and validate flight control systems, onboard power electronics, and more electric aircraft architectures—including eVTOL platforms—using real-time simulation for performance, safety, and system integration.

FAQ

Find the answers to your questions

What communication protocols do you support?

Consult our comprehensive list of supported protocols here: Communication Protocols

Resources

How can we help you?

eHS