EMC testing solutions for electric vehicles under real operating conditions

As you can see, the reality of electric vehicles is increasingly modern, and EMC testing is increasingly complex. Therefore, Rohde & Schwarz, in collaboration with AVL, has developed a comprehensive EMC testing solution for electric vehicles in dynamic conditions, meeting all requirements beyond the action standards. Let's follow the article below!

EMC in electric vehicles: new problems from new powertrains

The shift from internal combustion engine (ICE) vehicles to electric vehicles (EV) is not only a change in powertrain technology, but also entails a series of new electronic systems: such as HV battery packs, inverters, electric motors, ECUs, and all of which are potential sources of electromagnetic interference (EMI).

In particular, inverters are the strongest EMI-causing components due to their high switching frequencies and high voltages. When EVs use new technologies such as GaN inverters, the noise level can be 10 times higher than that of traditional IGBTs. These noises affect safety systems such as radar, cameras, and lidar sensors in ADAS, making EMC testing a mandatory requirement.

EMC testing under dynamic driving conditions

Most current EMC standards, such as CISPR 12 or CISPR 25, only require vehicles to operate at a fixed speed (e.g. 40 km/h). But in reality, electric vehicles operate continuously in many different modes: acceleration, deceleration, recharging, driving on slopes, city streets, highways, etc.

Lab measurements that do not adequately simulate these conditions will have difficulty detecting dangerous noise peaks, making the system susceptible to failure in real-world environments.

For example, the same car running at 40 km/h and 120 km/h will give completely different noise emission results, in many cases exceeding the standard threshold when entering dynamic mode.

The problem is: synchronizing test bench and measurement software

To test EMC under dynamic conditions, it is not possible to use only conventional measuring equipment. Enterprises need a test bench capable of accurately simulating the operating states of the vehicle: changing torque, increasing speed, recharging conditions, ambient temperature, etc.

However, a big challenge is how to synchronize these technical parameters with the EMC measuring software, so that the measurement takes place at the right time, at the right load conditions with the highest risk of generating interference.

Rohde & Schwarz and AVL Combined Solution: Unified EMC Test Platform

To address all of the above issues, Rohde & Schwarz has teamed up with AVL - a expert in simulation and dynamic testing - to develop a unified EMC test platform for real-world electric vehicle operating conditions.

System structure includes:

Rohde & Schwarz EMC system: R&S®ELEKTRA software, EMI receiver, generator, antenna, turntable

AVL PUMA test bench: simulation of motors, torque, batteries, environmental conditions, heat cabinets...

Common control interface: automatic synchronization between two software, no need for separate operation.

Outstanding features:

- Real-time synchronization of parameters: speed, torque, voltage, current, temperature...

- Detailed noise spectrum analysis according to each load condition

- Accurately determine dangerous noise frequencies and arising conditions

- Run automatic tests according to standard profiles: WLTC, NEDC, J10...

- Export full reports, easy to compare and analyze

Practical application: Full-process synchronous EMI/EMS testing

- With this system, engineers can:

- Plan EMC tests according to acceleration/deceleration cycles

- 2-way communication between PUMA and ELEKTRA to trigger measurements at the right time of high risk

- Monitor real-time noise spectrum

- Compare results between EMS modes on/off, with/without load to determine the actual impact

Refer to the document and learn more about the solution at:

関連ニュース

2026年07月22日 14時45分25秒

Which products are tested using a -40°C to +150°C thermal shock chamber?

Automotive circuit boards, sensors, modules, and plastic components can all experience issues after repeated transitions between cold and hot environments. A thermal shock chamber operating from -40°C to +150°C enables the replication of these temperature fluctuations under controlled testing conditions.

2026年07月22日 10時40分49秒

Does thermal shock cause damage to electronic components?

An electronic component may operate stably under constant temperature conditions yet fail after repeated rapid transitions between hot and cold. The issue typically stems not from a specific temperature level, but rather from the rate of temperature change and the number of hot-cold cycles

2026年07月21日 14時54分01秒

The rigorous standards behind a multi-million-dollar MRI suite

An MRI system may be correctly installed and fully connected to the power supply, yet still encounter issues if the surrounding environment fails to meet technical specifications. Electromagnetic interference, RF shielding, power quality, grounding, temperature, humidity, and particulate levels are all factors that may require assessment, depending on the facility's design and the manufacturer's requirements.

2026年07月21日 10時30分38秒

Sinusoidal and Random Vibration: A Test Setup Guide for Industrial Engineers

During the operation of industrial machinery or the transportation of goods, persistent mechanical vibrations inevitably occur; these are a primary cause of material fatigue, loosened connections, and cracking in printed circuit boards (PCBs). To ensure product integrity before delivery to customers, R&D and QA/QC engineers must simulate these dynamic forces using vibration test systems.

2026年07月20日 13時55分40秒

Capacities of laboratory centrifuge tubes

Tubes with capacities of 0.2 ml, 1.5 ml, 15 ml, or 50 ml are commonly found in laboratories, yet each type is associated with specific sample categories and equipment configurations. DNA and RNA samples typically require small-volume microtubes; blood and cell samples often utilize 5 ml or 15 ml tubes; while large-volume processing workflows may require tubes of 50 ml, 100 ml, or greater capacity