With more and more widely used in the industrial field, Active Magnetic Bearings (AMB) have bigger challenge, such as the size and the load capacity are larger than before. In order to increase the reliability of the whole system, a lot of aspects have to be improved to adapt some special industrial requirements. Just like the 10MW high temperature gas-cooled test module reactor (HTR-10GT) with the core made of spherical fuel elements, which was designed and constructed by the Institute of Nuclear and New Energy Technology of Tsinghua University in China, take the AMB as the support bearings. HTR-10GT is the reactor with 3.5 meter long rotor, 230mm diameter, and 15000rpm Rated speed. Since there are some difficulties in HTR-10GT including the blade stages, small gap and so on, the high precision control on magnetic bearing is required very much. Once any part in the system is out of work, the rotor would happen to vibrate, which will lead to turbine blades scraping. The consequences could be disastrous especially when the system is in full power at the rated speed [1].

As you know, the electronic control system is the weakest point in AMB, both in operating site and the control room. Therefore, before engineering applications, the electronic control system must be tested for Electromagnetic Compatibility (EMC). Based on the experimental results, some design would be optimized, to improve anti-interference capability to meet the requirements of HTR-10GT. This paper describes the testing process and gives some solutions for EMC problems during the Electro Magnetic Susceptibility (EMS) test, such as the grounding, cable, wiring, filtering etc. These methods are the fundamental basis for reducing interference and improving the reliability of AMB in the HTR-10GT.

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