Inverters for Safety-Critical Electric Drive Systems
Inverters as an Integral Part of the System Architecture
In safety-critical electric drive systems, an inverter is far more than a power conversion unit. It directly affects efficiency, dynamic response, control behaviour, thermal stability, electromagnetic compatibility (EMC), and the functional safety of the overall system.
Silver Atena therefore does not develop inverters as isolated components, but as an integral part of the system architecture. We combine system-level understanding with power electronics, control systems, embedded software, thermal design, EMC, and functional safety to create robust and verifiable overall solutions — from the concept phase through verification and validation to series production.
For more than 25 years, Silver Atena has developed power electronics for safety-critical high-voltage systems. This experience feeds directly into the development of customised inverters for automotive, aerospace and defence applications.
What Is a DC/AC Inverter?
A DC/AC inverter is a power electronics system that converts direct current (DC) into alternating current (AC). In electric drive systems, the inverter supplies the motor with precisely the electrical power required for torque, speed, dynamic response, and efficiency.
An inverter therefore does much more than simply convert energy. It forms the central interface between the energy source, power semiconductors, control system, protection functions, thermal design, and electrical load.
What matters is not only the basic function of the inverter, but its ability to integrate reliably, safely and efficiently into the overall system under real load profiles, thermal constraints, EMC requirements, and functional safety requirements.
The inverter is responsible in particular for:
- converting direct current (DC) into alternating current (AC)
- precisely supplying and controlling electrical power
- translating control commands into torque, speed, and power output
- coupling the energy source, power electronics, and electrical load
- acting as the central power control unit within the electric drive system
In many applications, the inverter does not operate in isolation, but interacts with other power electronics systems, such as DC/DC converters, vehicle electrical system architectures, and higher-level high-voltage systems. This interaction is crucial to the performance and stability of the overall system. Silver Atena masters this system integration through in-depth system expertise and many years of development experience in power electronics.
Why Inverters are Safety-Critical in High-Voltage Systems
In safety-critical applications, the inverter is not a downstream individual component, but a core element of the electric drive system.
It influences not only power conversion, but also efficiency, range, dynamic and control behaviour, thermal stability, service life, reliability, and the ability of the overall system to be integrated successfully.
The greatest risks often arise not within the inverter itself, but at its interfaces:
- between the energy source and the drive system
- between power electronics and the control system
- between switching behaviour and EMC characteristics
- between power losses and thermal management
- between monitoring functions, protection functions, and functional safety
If the inverter is not integrated into the overall architecture at an early stage, technical and organisational programme risks increase significantly. Typical consequences include thermal derating, EMC issues, unstable control behaviour, increased integration effort, late redesigns, and delays in the safety case.
Silver Atena addresses these risks early. By developing the inverter as part of the system architecture, critical interfaces are secured from the outset. This reduces iteration loops, minimises integration risks, and creates a reliable basis for verification, validation, and series production.
Customised Inverters for Automotive, Aerospace and Defence
Silver Atena develops inverters for safety-critical applications in the automotive, aerospace and defence sectors. Our expertise ranges from architecture definition and the development of high power-density power electronics to integration into complex overall platforms.
Requirements vary significantly depending on the industry. The decisive factor is not electrical performance alone, but above all the safe, robust and application-specific integration of the inverter into the respective overall system.
Automotive
In automotive applications, the inverter connects the high-voltage battery to the electric powertrain. It controls the electric motor and therefore has a direct impact on range, vehicle dynamics, efficiency, and thermal stability.
Inverters must provide high electrical power while also being robustly integrated into the vehicle architecture. Key focus areas include suitable topologies, advanced power semiconductors, stable current control loops, EMC-compliant integration, and compliance with functional safety requirements.
Aerospace
In aerospace applications, low weight, high efficiency, inherent safety, and deterministic behaviour are key requirements. Inverters supply electrical on-board and drive systems and control motors, actuators, and electromechanical systems under demanding environmental conditions.
High power density, robust and fault-tolerant electronics, safe and reliable communications, and dependable integration into highly critical overall systems are essential.
Defence
In defence applications, inverters must operate reliably even under extreme conditions. Mechanical loads, temperature cycles, high electrical loads, and mission-critical operating profiles place stringent demands on robustness, availability, and controlled behaviour in fault conditions.
Solutions must be designed consistently for real operating environments, ensuring high interference immunity, dependable operation, and long-term availability.
Application Examples for Inverters
High-Voltage Traction Inverter
The high-voltage traction inverter is a strong example of Silver Atena’s expertise in developing high power-density inverters for electric drive systems in the automotive sector. The focus is on high efficiency, robust integration into the vehicle architecture, and safe handling of demanding high-voltage requirements.
Electric Turbocharger
The electric turbocharger is an example of a highly dynamic application where precise control, fast response, and stable operation under demanding operating conditions are essential. It also demonstrates Silver Atena’s expertise in the development of high-performance electric drive systems.
FAN Inverter
The fan inverter demonstrates Silver Atena’s aerospace expertise. The focus is on high power density, low weight, safe and reliable communications, and dependable integration into highly critical aircraft systems.
Technological Expertise in Inverter Development
The development of a customised inverter does not begin with the hardware, but with system understanding.
This is one of Silver Atena’s core strengths: we do not reduce development to individual assemblies, but understand it as the interaction of system architecture, power electronics, control systems, thermal design, EMC, and safety requirements.
Only this integrated approach creates an inverter that performs not only on the test bench, but also reliably and robustly within the real overall system.
Silver Atena covers in particular:
- system architecture and topology selection — design based on power level, voltage class, and system requirements
- power electronics — development of compact, efficient and robust inverters
- silicon (Si) and silicon carbide (SiC) technologies — use of advanced semiconductors for optimised switching behaviour and high efficiency
- control systems and embedded software — precise and stable control of motors and actuators
- thermal design — alignment of power losses and cooling concept for real operating conditions
- EMC integration — ensuring low-emission and interference-resistant system behaviour
- protection and diagnostic functions — monitoring and controlled behaviour in fault conditions
- verification and validation — safeguarding the design through to series production readiness
For customers, this is directly relevant. Only when system architecture, power electronics, control systems, and integration are addressed holistically can an inverter be integrated into the overall architecture reliably, efficiently, and in a release-ready manner.
Your Benefits with Silver Atena in Inverter Development
Silver Atena develops inverters as an integral part of a robust electric drive system. System architecture, power electronics, control systems, thermal design, EMC, and functional safety are brought together early and tailored specifically to the application.
This reduces technical and organisational risks, minimises iteration loops, and creates a reliable basis for integration, verification, validation, and series production.
For customers, this means:
- reduced integration risks
- fewer iteration loops and redesigns
- robust design for real operating conditions
- better control of EMC, thermal behaviour, and functional safety
- greater planning reliability through to industrialisation and series production
- customised development instead of a standard off-the-shelf solution
- a robust overall system instead of isolated individual components
Silver Atena combines experience in power electronics, embedded systems, and safety-critical development with in-depth system expertise in automotive, aerospace, and defence. The result is inverters that operate reliably and robustly in real-world use — not only in block diagrams or on the test bench.
When Silver Atena is the Right Partner for Inverter Development
Silver Atena is the right partner when an inverter must not simply be developed as a standalone component, but designed and validated as an integral part of a safety-critical electric drive system.
This applies in particular if you need to:
- consider system architecture, control systems, thermal design, EMC, and functional safety holistically from an early stage
- reduce integration risks in the early phases of the project
- develop a customised inverter optimally matched to the application and system environment
- take verification, validation, and series production readiness into account from the outset
- work with a development partner capable of assuming system responsibility
Silver Atena develops inverters as architecture-relevant elements of the overall system. We combine experience in power electronics, embedded systems, and safety-critical development with strong expertise in system architecture, topology selection, high power-density power electronics, control systems, embedded software, and thermal and EMC-compliant design.
Develop Your Inverter — Discuss Your Project with Silver Atena
Are you planning an inverter for a safety-critical application, or are you facing key architectural decisions?
Talk to us about your system and the critical technical decisions — from architecture and power dimensioning through to integration.
For an overall system that not only works, but remains stable and reliable in real-world operation.