Filter apparatus and power supply system
First Claim
1. 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, whereinthe 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.
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Accused Products
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.
26 Citations
10 Claims
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1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A power supply system, comprising:
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a filter apparatus, an external power source, and a device, wherein the filter apparatus is connected between the external power source and the device, and the filter apparatus, the external power source, and the device form a loop by using a line, when the device runs, a first common-mode noise signal is generated on the line; wherein 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 the 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.
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Specification