Customer-specific test benches for power electronics, functional and temperature testing, as well as radome test systems with proprietary measurement software LisRT.
Löhnert Elektronik GmbH
Lauf a.d. Pegnitz (DE)New on Amplifa
About Löhnert Elektronik
Löhnert Elektronik GmbH is a provider specializing in measurement, control and test technology based in Lauf an der Pegnitz near Nuremberg. The company develops and manufactures customer-specific test benches, including test benches for testing power electronics (HVPC and Zth test stations for thyristors, IGBTs, FETs and diodes), functional and end-of-line test benches for electronic assemblies, temperature and run-in test benches for automotive control units, and radome test systems based on the R&S QAR50. In addition, automation solutions with PLC programming, electronics development from circuit design to small series, software development with the in-house measurement software LisRT V3, as well as 19-inch technology, modules, devices and a universal laser marking station are offered. The value chain includes project engineering, electrical assembly, programming and commissioning; mechanical design and construction are carried out with partner companies. Customers come primarily from the automotive industry, the power and electronics industries, and the test and measurement technology sector. Around 50 employees work at the Lauf site, which is located directly on the A9 motorway.
- Site
- Lauf a.d. Pegnitz
- Processes
- Test bench construction (customer-specific, testing of power electronics, functional, temperature,, Temperature cycling testing for automotive drive inverters (-40°C to approx. 110°C, circulating-air, Radome measurement / radome testing (reflection and transmission, with Rohde & Schwarz R&S QAR50), Automation / PLC programming (CoDeSys, TwinCat 2/3, TIA Portal, OpCon, VAL3, RobotStudio), Electronics development (analog/digital circuit design, layout, prototypes, small series,, Software development (test programs, device drivers, C#/.NET, LabVIEW, TestStand), Functional testing of electronic assemblies (manual end-of-line test bench), Testing and calibration of actuator coils with displacement measuring system (end-of-line, rotary
- Materials
- Thyristors, IGBTs, FETs (MOSFET), Diodes (power semiconductors), HVPC Test Station, Zth Test Bench, Radome Test Systems (R&S QAR50/QAR50-R), LisRT V3 Measurement and Automation Software
- Certificates
- ISO 9001
- Founded
- 1978
- Employees
- ca. 50
- Industries
- Automotive, Power electronics, Electronic assemblies, Test and measurement technology
- 01
Project engineering
- 02
Electronics development (circuit design, layout)
- 03
Construction (partner)
- 04
Electrical assembly
- 05
Programming (LisRT V3, PLC, LabVIEW/TestStand)
- 06
Commissioning
Processes & Test Technologies
HVPC Test Station
Power-cycle measurement on power semiconductors with high voltage 2500 V/400 mA and high current 15 V/1200 A.
Zth Test Bench
Measurement of transient thermal resistances on power modules via the VPC interface.
Radome Test Systems (R&S QAR50/QAR50-R)
Imaging testing of radomes in reflection and transmission; with an industrial robot, entire bumpers as well.
LisRT V3 Measurement and Automation Software
Proprietary test and measurement automation software, the core of all test benches and test systems.
Universal Test Facility UPE Gen2
Compact all-in-one test facility with over 200 inputs and outputs for complex test items.
Universal Laser Marking Station
Laser marking of individual parts and components including control via LisRT V3, available through partner Hörber + Hetzner.
PLC and Robotics Programming
Programming of production systems with CoDeSys, TwinCat 2/3, TIA Portal, VAL3 and RobotStudio.
Locations
Lauf a.d. Pegnitz
DEHeadquarters with office and production
- Lot size
- Prototypes and small series (electronics development)
- Materials
- Electronic assemblies, power semiconductors, electromechanical assemblies
- HVPC test station (2500 V/400 mA, 15 V/1200 A)
- Zth test bench (VPC G10)
- Radome test bench R&S QAR50 / QAR50-R
- Transducer radome test bench (76–81 GHz)
- UPE Gen2 (over 200 I/O)
- Automotive Run-In-Controller L19708
- Mechmux L19619.53.01
- Laser marking station ULP series
- Industrial robot for QAR50-R
Products & Test Items
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Test bench construction (customer-specific, testing of power electronics, functional, temperature,Testing | – | – | – | – | – |
| Temperature cycling testing for automotive drive inverters (-40°C to approx. 110°C, circulating-airTesting | – | – | – | – | Power inverters |
| Radome measurement / radome testing (reflection and transmission, with Rohde & Schwarz R&S QAR50)Testing | – | – | – | – | – |
| Automation / PLC programming (CoDeSys, TwinCat 2/3, TIA Portal, OpCon, VAL3, RobotStudio)Engineering | – | – | – | – | – |
| Electronics development (analog/digital circuit design, layout, prototypes, small series,Engineering | – | – | – | – | – |
| Software development (test programs, device drivers, C#/.NET, LabVIEW, TestStand)Engineering | – | – | – | – | – |
| Functional testing of electronic assemblies (manual end-of-line test bench)Testing | – | – | – | – | – |
| Testing and calibration of actuator coils with displacement measuring system (end-of-line, rotaryTesting | – | – | – | – | – |
| Automated calibration station for magnetic field sensors (displacement/angle sensors, currentTesting | – | – | – | – | – |
| End-of-line testing of device modules (high-voltage tests up to 5 kV, resistance andTesting | – | – | – | – | – |
| Run-in / temperature testing of control units (cold/hot test, tunnel solution withTesting | – | – | – | – | – |
| Power-cycle measurement on power semiconductors (HVPC test bench): thyristors, IGBTs, FETs, diodes;Testing | – | – | – | – | Thyristors, IGBTs, FETs, Diodes |
| Zth measurement (transient thermal resistances on power modules, VPC interface)Testing | – | – | – | – | – |
| Make/buy production line for assembly and testing of MOSFET inverter systems (SKAI 3 LV) withAssembly | – | – | – | – | – |
| Laser marking (universal laser marking station, ULP series, with partner Hörber + Hetzner)Surface treatment | – | – | – | – | – |
| Testing of initiators (fire/no-fire conditions, triggering of pyrotechnic actuators, 0.1A–10ATesting | – | – | – | – | – |
| Flashing/programming of electronic assemblies (flashing station)Testing | – | – | – | – | – |
9 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| HVPC test bench (power-cycle measurement on power semiconductors) | Löhnert Elektronik HVPC test station | – | 3x 400V/50Hz, 24kVA, high voltage 2500V/400mA, high current 15V/1200A | – | Lauf a.d. Pegnitz |
| Zth test bench (thermal resistance measurement) | Löhnert Elektronik Zth test bench | – | 3x 400V/50Hz, approx. 22kVA, VPC G10 | – | Lauf a.d. Pegnitz |
| Radome test bench (imaging tester) | Rohde & Schwarz QAR50 / QAR50-R | – | Reflection and transmission, cycle times under 10 seconds (QAR50) | – | Lauf a.d. Pegnitz |
| Transducer radome test bench (radar source + power detector) | Löhnert Elektronik L18C05 | – | 76 - 81 GHz | – | Lauf a.d. Pegnitz |
| Industrial robot (for QAR50-R radome testing) | – | – | entire bumpers in various positions and angles | – | – |
| Laser marking station (laser boxes) | Hörber + Hetzner ULP 330-SK / ULP 450-H / ULP 360-HS | – | – | – | Lauf a.d. Pegnitz |
| Universal test facility (UPE Gen2, >200 inputs/outputs) | Löhnert Elektronik UPE Gen2 | – | – | – | Lauf a.d. Pegnitz |
| Run-in controller (stress endurance run for ECUs, up to 3 test items, CAN) | Löhnert Elektronik Automotive Run-In-Controller L19708 | – | – | – | Lauf a.d. Pegnitz |
| 10-fold measurement multiplexer (90 contacts, max. 50A, 4s switching time) | Löhnert Elektronik Mechmux L19619.53.01 | – | – | – | Lauf a.d. Pegnitz |
Additional services
Reference customers
Quality
Löhnert Elektronik has been certified to ISO 9001 since 2004. Test benches are equipped with the in-house measurement software LisRT V3 and documented test processes, including laser marking for traceability.
| Evidence | Lauf a.d. Pegnitz |
|---|---|
| ISO 9001 |
Company History
- 1978
Founding of Löhnert Elektronik KG by Adalbert and Edeltraud Löhnert in Rückersdorf
- 1982
New business premises in Schwaig
- 1995
Conversion into Löhnert Elektronik GmbH; Thomas Baum and Stephan Horváth become co-partners
- 2000
Thomas Baum becomes new managing director; Stephan Horváth holds commercial power of attorney
- 2004
Certification to ISO 9001
- 2011
Relocation to a new building in Lauf
- 2014
More than 40 employees
- 2019
Doubling of office and production space
- 2020
Commercial power of attorney granted to Marco Herbst and Michael Möller
- 2022
Michael Möller becomes second managing director