公开(公告)号：US20150009727A1

公开(公告)日：2015-01-08

申请号：US14322417

申请日：2014-07-02

Applicant: Delta Electronics (Shanghai) Co., Ltd.

Inventor： Jinping ZHOU ,  Min ZHOU ,  Yicong XIE

IPC: H02M1/44

CPC classification number: H02M1/44 ,  H02M1/12 ,  H02M7/219 ,  H02M7/487 ,  H02M7/5387 ,  H02M2001/123 ,  Y02B70/1441

Abstract: The present invention relates to a power converter with low common mode noise, at least comprising: a ground terminal, a power converting unit, a capacitor unit of common DC bus, a filtering capacitor unit, a filtering inductor unit, and a compensation unit. In the present invention, a filtering inductor unit including three primary windings and three auxiliary windings is used for making the power converting unit couple to three phase terminals of an external electrical apparatus. Moreover, the three auxiliary windings are further formed a compensation circuit by way of being connected with the compensation unit, such that the engineer is able to easily and effectively suppress the common mode noise occurring near the resonant frequency of the power converting apparatus through selecting a suitable turns ratio of the primary windings and the auxiliary windings.

Abstract translation: 本发明涉及具有低共模噪声的功率转换器，至少包括：接地端子，功率转换单元，公共DC总线的电容器单元，滤波电容器单元，滤波电感器单元和补偿单元。 在本发明中，使用包括三个初级绕组和三个辅助绕组的滤波电感器单元来使功率转换单元耦合到外部电气设备的三相端子。 此外，三个辅助绕组还通过与补偿单元连接而形成补偿电路，使得工程师能够容易且有效地抑制在功率转换装置的谐振频率附近产生的共模噪声，通过选择 初级绕组和辅助绕组的合适匝数比。