US 10,447,225 B2Granted

Filter apparatus and power supply system

AssigneeHuawei Technologies Co., Ltd.

InventorsChangsheng Pei, Yongbing Gao, Heling Zhang

Life of this patent

Estimating the term…

Loading patent…

Abstract

A filter apparatus, which includes a feedback active common-mode filter and a feed-forward active common-mode filter, the feedback active common-mode filter includes a common-mode noise detection component and a first filter circuit, and the feed-forward active common-mode filter includes the common-mode noise detection component and a second filter circuit, where the first filter circuit is connected between the common-mode noise detection component and the device, and performs feedback filtering on a first common-mode noise signal, to obtain a second common-mode noise signal; the common-mode noise detection component is connected between the first filter circuit and the second filter circuit, detects the second common-mode noise signal, and provides the second filter circuit with the second common-mode noise signal; and the second filter circuit is connected between an external power source and the common-mode noise detection component, and performs feed-forward filtering on the second common-mode noise signal.

Claims10

Dependent claims

A filter apparatus, wherein the filter apparatus is connected between an external power source and a device, the filter apparatus is configured to perform filtering processing on a noise signal from the device, the filter apparatus comprises a feedback active common-mode filter and a feed-forward active common-mode filter, the feedback active common-mode filter comprises a common-mode noise detection component and a first filter circuit, and the feed-forward active common-mode filter comprises the common-mode noise detection component and a second filter circuit, wherein

the first filter circuit is connected between the common-mode noise detection component and the device, and the first filter circuit is configured to perform feedback filtering processing on a first common-mode noise signal from the device, to obtain a second common-mode noise signal;
the common-mode noise detection component is connected between the first filter circuit and the second filter circuit, and the common-mode noise detection component is configured to detect the second common-mode noise signal, and provide the second filter circuit with the second common-mode noise signal;
and
the second filter circuit is connected between the external power source and the common-mode noise detection component, and the second filter circuit is configured to perform feed-forward filtering processing on the second common-mode noise signal.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 15/794,817Filed 26 Oct 2017 · continuation
Priority: CN 2015 1 020480627 Apr 2015
Published: US 2018/0048223 A115 Feb 2018
Granted: 15 Oct 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

H02J 3/00142
For preventing or reducing power oscillations in networks: oscillations concerning frequency
H02J 3/01
Circuit arrangements for AC mains or AC distribution networks: arrangements for reducing harmonics or ripples
H02J 3/1835
Using shunt compensators: with stepless control
H02M 1/12
Details of apparatus for conversion: arrangements for reducing harmonics from AC input or output