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Electromagnetic field radiation from electric vehicles

1. Introduction to the test

With the development of science and technology, the additional functions of automobile electronics have become one of the main axes of automobile development, but at the same time, many EMC problems have arisen. The radio, communication system, motor, audio, high-speed switching device, and microprocessor on the motherboard in the vehicle may all generate electromagnetic interference (EMI). In addition, many important control system functions such as braking, transmission, steering, and monitoring have been electronically controlled. The performance of safe driving of vehicles is also closely related to the electromagnetic environment in which they work. Then an important factor that needs to be assessed first is that the vehicle will not cause electromagnetic interference (EMI) to the surrounding environment during the start/running process. The EMI limits refer to the standard GB 18387/ SAE J551-5, and the test frequency bands are as follows:

0.15MHz～30MHz 1m long vertical monopole antenna for electric field test

0.15MHz～30MHz 60cm diameter electrostatic shielding loop antenna for magnetic field testing

2. System connection diagram

3. Typical configuration

Radiation Emission【Based on GB 18387/ SAE J551-5】
serial number	product	illustrate	brand
1	ESW8	EMI fully compatible test receiver, frequency range 1Hz~8GHz	Rohde&Schwarz/Germany
2	EMC32	EMI test software, suitable for all civil standards/automotive standards/military standards, the software needs to be used with a key	Rohde&Schwarz/Germany
3	HFH2-Z6E	Active rod antenna, 8.3kHz~30MHz, according to the standard MIL-STD-D/E/F, etc.	Rohde&Schwarz/Germany
4	HFH2-Z2E	Loop antenna, 8.3kHz~30MHz, according to the standard MIL-STD-D/E/F, etc.	Rohde&Schwarz/Germany
5	SAC10	10-meter semi-anechoic chamber	Frankonia/Germany

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