Simulation and power electronics · Regensburg, Germany
Real-time simulation and inverters for electric drives
OverDrive validates your inverter software up to 32 times faster than conventional simulation tools – physically exact. Our 48 V inverters take the drive onto the road and into the air. Both from a single source.
Persystems vs. PLECS – three-phase half-bridge
Phase currents during run-up, same circuit, same parameters
Persystems iu iv iw PLECS
Curve comparison: Persystems benchmark, August 2026. Computing time: one SiL validation loop in 15 min instead of 8 h (Graz Smart Vehicle Forum 2025).
Customers and partners
Products
Two products. One goal: a working drive, faster.
We simulate the drive we build – and build the drive we simulate. That is why our software and our hardware fit together, from the first model to series production.
Software
OverDrive – real-time simulation of electric drives
OverDrive simulates motor, inverter and control in a physically consistent way – and up to 32 times faster than conventional simulation tools. It is built on structure-preserving integrators: they conserve energy, momentum and charge over the entire simulation and stay stable even with large time steps.
Validate your inverter software before the hardware exists – as an FMU directly in Simulink, CarMaker or your co-simulation environment.
Key facts
| Speed | up to 32× faster than conventional simulation tools |
| Validation | inverter validation 2× faster than real time |
| Integration | FMU according to the FMI standard – Simulink, CarMaker and other co-simulation environments |
| Numerics | structure-preserving integrators; energy, momentum and charge are conserved |
| Use cases | virtual function development, controller design, MiL/SiL/HiL |
Video: OverDrive as an FMU in IPG CarMaker – demo vehicle with one electric motor, drivetrain built from Persystems models. Playing the video transfers data to YouTube; nothing is loaded before that.
Hardware
INV-60V-120A inverter – 48 V power electronics with field-oriented control
Compact inverter for drives from 17 to 60 V with 6 kW continuous power – as a housed variant, an embedded board or an Aero variant from 108 grams. Field-oriented control (FOC), CAN and DroneCAN interface, full telemetry and integrated protection functions – designed for compactness, reliability and flexibility.
For UAVs, traction drives and mobile machinery. Several inverters on the same bus are detected and addressed automatically; parameterization and firmware updates run over CAN. New in the family: the GaN inverter INV-120V-40A with 99.125 % efficiency for long-endurance flight – all models in the inverter overview.
Key facts
| Models | INV-60V-120A · 6 kW continuous power |
| Voltage | up to 60 V, designed for 48 V systems |
| Control | field-oriented (FOC), speed and torque control |
| Interfaces | CAN (PersyCAN), DroneCAN, PWM/PPM |
| Telemetry | phase and DC current, DC voltage, speed, torque, MOSFET and motor temperature, fault status |
| Protection | overcurrent, overtemperature, undervoltage; Safe Torque Off, Active Short Circuit |
Why Persystems
Physics that makes it into series production.
Physics instead of approximation
Our algorithms come from geometric mechanics. They preserve the structure of the physical system – and therefore deliver results that are still correct after millions of time steps.
Software and hardware from a single source
OverDrive and our inverters are developed by the same team. That shortens development cycles and avoids surprises on the test bench.
Tested on our own test bench
We measure inverters and motors on our own test bench in Regensburg – with power analyzer, torque transducer and continuous CAN logging.
Direct line to the engineers
You talk to the engineers who developed the software and the hardware. No detours, clear answers.
Applications
From multicopters to traction drives.
UAV · Drones
ESC with DroneCAN
Status telemetry at 10 Hz, dynamic node allocation and up to 20 ESC indices per bus – for multicopters, VTOL and heavy-lift drones.
Industry · Robotics
48 V drives
For robotics, mobile machinery and industrial drives: compact, rugged, with speed and torque control and CAN connection to the machine network.
Development · Validation
Simulation as an FMU
OverDrive in Simulink or CarMaker: test inverter software, tune controllers and speed up HiL tests – before the first board is built.
Company
About Persystems
Founded in 2022 as a spin-off of the University of Regensburg, Persystems combines fundamental research in physics with series development. Simulation software and power electronics are created by the same team – in Regensburg, Germany.
| Founded | 2022, spin-off of the University of Regensburg |
| Managing director | Dr. Tobias Lautenschlager |
| Core competence | Structure-preserving simulation, field-oriented control, power electronics |
| Location | Regensburg, Germany |
Contact
Let’s talk about your drive.
Planning an electric drive, looking for an inverter for your project, or want to speed up your simulation? Write to us – you will get an answer straight from the engineering team.