Electromagnetic Compatibility (EMC)

The EMC lab at Fraunhofer IISB offers precise precompliance measurements during the development process of prototype systems and components of our industrial partners. We offer a wide range of services from consulting in case of EMC problems and different measurements according to harmonized standards to very detailed circuit and layout optimizations.

Our engineers have longtime experience in the fields of electromagnetic compliance (EMC) and interference (EMI) which they contribute to several national standardization committees, for example. We can thus guarantee competent expert advice and up-to-date information on EMC topics to our partners.

The immunity and emission to electromagnetic interferences can be tested in our Fully Anechoic Room (FAR) in accordance to residential, industrial and automotive standards. These tests include all relevant pre compliance measurements in context of a homologation testing in accordance to the automotive standards of UN-ECE R10 Rev. 6 Regulation or the Directive 2014/30/EU of the European Parliament on the harmonization of the laws of the Member States relating to electromagnetic compatibility (EMC).

• Fully Anechoic Room (FAR) - 6.0 m x 3.5 m x 2.0 m
• 150 W RF power amplifier from 10 kHz up to 1 GHz
• BCI coupling devices (CDNs, clamps) in acc. to ISO and IEC
• EMC full compliance TDEMI test receiver in acc. to CISPR 16-1-1 from 10 Hz up to 6 GHz
• E/H/EM-Field measurement antennas from 9 kHz up to 2 GHz for emission and immunity tests
• E-Field probs for test site calibration in acc. to ISO and IEC from 10 kHz up to 6 GHz
• ISO Pulse test generators in acc. to ISO 7637-2 / -3 and ISO 16750-2
• Electrical fast transient / burst immunity test equipment in acc. to IEC 61000-4-4
• Surge immunity test equipment in acc. to IEC 61000-4-5
• Conducted disturbances inducted by RF fields test equipment in acc. to IEC 61000-4-6
• ESD simulator up to 30 kV in acc. to IEC 61000-4-2 and ISO 10605
• Special equipment for monitoring and control the DUT by means of fiber optics
• EUT can be supplied with coolant and electrical energy via high power filters (1000 VDC / 500 A)

• IEC/CISPR 12/25 Vehicles, boats and internal combustion engines
  
  • Radio disturbance characteristics
    
  • Limits and methods of measurement for the protection of
    
    • CISPR12 off-board receivers
      
    • CISPR25 on-board receivers
• ISO7637-2 /-3 Electrical disturbances from conduction and coupling
  
  • Part 2: supply lines
    
  • Part 3: other lines
• ISO 16750-2 Environmental conditions and testing for electrical and electronic equipment
  
  • Part 2: electrical loads
• ISO 11452-x
  
  • Part 2: Anechoic chamber
    
  • Part 4: BCI current injection
    
  • Part 5: Stripline
    
• IEC 61851-21-x Electric vehicle conductive charging system
  
  • Part 1: on-board charger
    
  • Part 2: off-board charger  

IEC / CISPR Radio-frequency disturbance characteristics tests for residential and industry applications

• CISPR 11 Industrial scientific and medical equipment
  
  • Radio-frequency disturbance characteristics
    
• IEC 61800-3 Adjustable speed electrical power drive systems 
  
  • Part 3: EMC requirements and specific test methods
    
• CISPR 14-1 Requirements for household appliances, electric tools, and similar apparatus 
  
  • Part 1: Emission
    
• IEC 61000-6-x
  
  • Part 1: Immunity standard for residential, commercial, and light-industrial environments
    
  • Part 2: Immunity standard for industrial environments
    
  • Part 3: Emission standard for residential, commercial, and light-industrial environments
    
  • Part 4: Emission standard for industrial environments  

IEC Transient Immunity tests of basic standards for residential and industry applications  

• IEC 61000-4-2 Electrostatic Discharge immunity test (ESD)
  
• IEC 61000-4-3 RF and EM field immunity test
  
• IEC 61000-4-4 Electrical fast transient / Burst immunity test
  
• IEC 61000-4-5 Surge immunity test
  
• IEC 61000-4-6 Conducted disturbances inducted by radio frequency fields  

• Section 20 - Radio Frequency Susceptibility (Radiated and Conducted)
• Section 21 - Emission of Radio Frequency Energy
• Section 25 - Electrostatic Discharge (ESD)

Development of novel, structure-flexibly integrable passive electronic components

With the help of new materials, new passive electronic components (capacitances and inductances) can be developed. For example, newly developed EMC filter components could be developed into a complex mechatronic system for driving a hybrid vehicle. These are flexible and remote from standard geometries. It is necessary to examine the newly developed materials with regard to their producibility, thermal and electromagnetic properties. To this end, new component structures are selected and produced by means of field simulation programs. With the help of new techniques, new components are to be developed and built up for special mechatronic systems, e.g., voltage transformers or certain EMC filters, which allow an optimal utilization of complicated structural space geometries.

Goal

Minimization of the material effort required to reduce the electromagnetic interference emission of power electronics in electric vehicles

Challenges

• Material optimization in interplay between processability, mechanical and electro-magnetic properties
• Material characterization
• Development of novel component structures considering feasibility, reliability and electrical targets
• Development of passive measurement methods for the early assessment of EMC behavior
• Ltspice modeling of power modules considering parasitic elements
• Characterization of CM currents using mathematical models (Ltspice)
• Layout design for optimizing the disturbance behavior

Results

• Deeper understanding of the disturbance model as well as the development of a simulation tool for the early electromagnetic evaluation of power electronics.
• Development of a newly developed passive measuring method, which enables the evaluation of partial components in the prototype stage.