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Power electronics

Your development and manufacturing partner for custom power electronics

Our modular system allows you to select from a wide range of available technologies and solutions to build an optimal system tailored to your power electronics requirements. We have expertise in driving various semiconductor technologies, such as SiC, GaN, IGBT, and Si-MOSFET, across power ranges from a few hundred watts to several hundred kilowatts. Our modular system includes various power conversion topologies, such as AC/DC converters, step-up converters, step-down converters, bidirectional resonant converters, and power controllers, as well as power converters and drive controls for a wide range of motor technologies. This modular system enables rapid development and thus the quick implementation of your project—100% tailored to your application. The ability to integrate additional functionalities onto a single module creates decisive market advantages for our customers. Our expertise enables us to implement concepts that are both highly innovative and unbeatable in terms of price. Please feel free to contact us, and we’ll discuss the details of your project:

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Bidirectional resonance inverter, Power electronics

Power electronics
Information

Custom DC/DC resonant converters with galvanic isolation

DC/DC resonant converters for galvanic isolation use a resonant circuit, typically consisting of inductors and capacitors, to efficiently transfer energy between the input and output. The circuit operates at a resonant frequency at which losses are minimized. The reduction of switching losses and EMI contributes to a higher overall efficiency of the converter. Compared to conventional PWM-based DC/DC converters, the design of a resonant converter is more complex as the resonance conditions must be precisely tuned. Resonant operation allows higher switching frequencies to be achieved, which leads to a reduction in the size and weight of passive components (such as transformers and filters). The resonant technology also ensures that the voltage and current peaks that occur in conventional switching processes are reduced, resulting in less stress on the components.

Custom DC/DC converters, boost converters, and buck converters

The DC/DC converter topologies are fundamental components in the conversion of electrical power.

Similarities and differences between boost/decompression adjusters

Similarities:

  • Both types of converter use switches, diodes, inductors and capacitors to convert voltage.
  • They work by periodically switching and storing energy in inductors.

Differences:

  • Boost converter: Increases the voltage, suitable for applications where a higher voltage is required than the available input voltage.
  • Buck Converter: Reduces the voltage, suitable for applications where a lower voltage is required than the available input voltage.

Combination:

  • Step-up and step-down converters can be combined with each other, enabling bidirectional operation. The energy can then flow in both directions.

KNESTEL
KNOW-HOW

  • Power & voltage range:
IGBT Version
SiC Version
Input voltage Ue
2x 650 VDC
650 VDC – 750 VDC
2x 720 VDC
650 VDC – 750 VDC
Output voltage Ua
100 VDC- 1000 VDC
25 VDC- 100 VDC (optional)
100 VDC- 1400 VDC
25 VDC- 100 VDC (optional)
Output current Ia
Connection in series 160 A
or parallel 320 A
Connection in series 350 A
or parallel 700 A
Power
100 kW
250 kW
  • Voltage range: up to 1200 VDC
  • Control tasks: separate or integrable in power electronics
  • Communication: CAN, EtherCAT, ModBus TCP/IP, Ethernet; proprietary bus systems such as Profibus, Profinet, etc. available on request
  • Measurement technology: high-performance current/voltage measurement, temperature measurement, etc. optional

Possible applications

for customer-specific power electronics

Possible applications

  • E-Mobility / Battery management
  • Test stands / test environments
  • SmartGrids
  • DC grids with a shared DC bus
  • Uninterruptible Power Supply (UPS)
  • Electrical systems for electric vehicles (EV)
  • Power management and energy storage systems
  • Mega Watt Charging (MCS)
  • Illumination technology
  • Marine electronics: power electronics for marine propulsion systems and on-board power supply systems.
  • Highly efficient and precise drive tasks of all kinds
  • Active rectifiers with energy recovery
  • Electrical component simulation

Request your customized solution now:

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Not every solution
starts from scratch

Today, many requirements can be met using our modular knestronX platform. Instead of developing each power electronics system from scratch, we rely on proven topologies and scalable modules. This reduces development effort, shortens project timelines, and minimizes technical risks.

Discover knestronX products →

Completed projects

DC/DC Converter

Motor Control

Measuring technology

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now

  • Power electronics
    Configurator
Übersetzer

Sie kennen schon alle technischen Details Ihres Projekts? Dann nutzen Sie unseren Konfigurator, um Ihre Leistungselektronik Lösung zusammen zu stellen.

Jetzt direkt ihr individuelles Projekt anfragen:

Do you already know all the technical details of your project? Then use our configurator to put together your power electronics solution.

Request a quote for your custom project now:

Go to the Configurator

Frequently asked questions about power electronics

Power electronics refers to the conversion, regulation, control, and distribution of electrical energy using semiconductor technology. KNESTEL develops customized power electronic systems, e.g., for DC/DC converters and frequency converters.

KNESTEL offers customized solutions in the field of DC/DC conversion, intelligent power supplies, inverters, and frequency converters for electric motors and actuators.

Unsere Systeme werden in Energiespeichern (BESS), Ladesäulen, Antriebstechnik, Industrieautomation, Medizintechnik, Prüfständen sowie in Smart-Grid-Umgebungen eingesetzt.

Maßgeschneiderte Leistungselektronik passt sich exakt an Systemanforderungen an. Dadurch sind bessere Wirkungsgrade, kompaktere Bauformen und optimierte Schnittstellen möglich. In gezielten Anwendungen sind die Lösungen oftmals sehr kosten-effektiv. Die Entwicklung dieser spezifischen Lösungen erfolgt in relativ kurzen Zeiträumen.

Ja. KNESTEL verfügt über langjährige Erfahrung in der Entwicklung galvanisch isolierter DC/DC-Wandler – mit unterschiedlichen Topologien (Hochsetzsteller und Tiefsetzsteller) für Spannungen bis 1500V. Die DC/DC-Wandler können auch ohne galvanische Isolation aufgebaut werden.

KNESTEL relies on modern power semiconductors such as silicon carbide (SiC) and develops systems based on FPGA, digital signal processors, and microcontrollers for precise control and monitoring.

Yes. KNESTEL implements solutions with outputs of 50 kW, 100 kW, 125 kW, and 250 kW per module. The modules can be set up in parallel for more power and electricity in order to also implement systems in the megawatt range. For example, four 250 kW modules result in 1 megawatt of power.

Yes. In addition to development, KNESTEL also handles series production in-house—including assembly, installation, testing, and test reporting. This means that everything comes from a single source and is made in Germany.

Use the power electronics configurator on our website or call our sales team directly at 08372-7080. We will analyze your requirements and develop a customized solution for your project.

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