SHIELDING STRUCTURE FOR POWER CONVERSION SYSTEM

摘要

An electromagnetic shielding structure includes a first shielding material disposed at a first location with respect to at least one radiation source and a second shielding material attached with the first shielding material by fastening means. The second shielding material is disposed at a second location with respect to the at least one electromagnetic radiation source so as to define a predetermined gap between the first shielding material and the second shielding material. The first shielding material shields at least part of first frequency electromagnetic radiations generated from the at least one electromagnetic radiation source and penetrating through the second shielding material and the predetermined gap. The second shielding material shields at least part of second frequency electromagnetic radiations generated from the at least one electromagnetic radiation source.

主权项

1. A system for driving an AC electric motor, the system comprising:
a converter configured to perform power conversion and provide at least a first phase AC current output to a first winding of the AC electric motor via a first conduction path, a second phase AC current output to a second winding of the AC electric motor via a second conduction path, and a third phase AC current output to a third winding of the AC electric motor via a third conduction path; and a cabinet for accommodating the converter therein, the cabinet comprising:
a first shielding member disposed on at least one side of the cabinet, the first shielding member capable of absorbing at least a part of first frequency range electromagnetic radiations generated from at least one of the first phase AC current flowing through the first conduction path, the second phase AC current flowing through the second conduction path, and the third phase AC current flowing through the third conduction path; anda second shielding member disposed adjacent to the first shielding member, the second shielding member capable of absorbing at least a part of second frequency range electromagnetic radiations generated from at least one of the first phase AC current flowing through the first conduction path, the second phase AC current flowing through the second conduction path, and the third phase AC current flowing through the third conduction path.