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Common Mode Filter Device

A common-mode filter and source filter technology, applied in output power conversion devices, inductors, broadband transformers, etc., can solve the problems of increasing installation costs and reducing power conversion efficiency of transformers, and achieve the effect of reducing costs.

Active Publication Date: 2017-09-12
KERRYJ INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Transformers reduce power conversion efficiency and increase installed cost, size and mass

Method used

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  • Common Mode Filter Device
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Examples

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Embodiment Construction

[0092] refer to Figure 4 Block and partial circuit diagrams are shown, which illustrate common mode filter devices and systems in exemplary circuits. The device can use active common mode filters or passive common mode filters. The power converter is shown with an AC power port connected to the AC utility grid and a DC power port connected to the input port of the active CM filter. The output port of the active CM filter is connected to an external circuit such as a power supply or a load.

[0093] In this form, a common mode filter device and system has a common mode filter used in series with a power converter to support common mode voltage differences between power converter ports and to control common mode current to acceptable levels. The power converter can be a VSI. The common-mode filter utilizes the real-time measured common-mode current and uses the common-mode current return path and impedance to provide real-time control of the common-mode current.

[0094] Ac...

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Abstract

A common mode filter arrangement for regulating aspects of power conversion by a power converter from an external source, such as a solar panel, to another external circuit, wherein the common mode filter arrangement substantially attenuates The switching frequency of the power converter plus the common-mode voltage at harmonics, and wherein the common-mode filter arrangement has a series connection with the power converter to support the common-mode voltage difference between the power converter ports and divide the common-mode current common-mode filter controlled at acceptable levels. The power converter may be single-phase, but is preferably multi-phase.

Description

technical field [0001] The present invention relates to an arrangement for power converter and inverter systems using an active common mode filter. In particular, but not limited thereto, the present invention relates to a common mode filter arrangement for regulating aspects of power conversion from an external source, such as a solar panel, to a utility grid. Background technique [0002] Power converters are used to transfer power between circuits. Each circuit is connected to a different power port of the power converter. Each power port has at least two power conductors. Power port voltages are characterized by differential mode (DM) voltages and common mode (CM) voltages. DM voltage is the potential difference between a pair of electrical conductors. The CM voltage is the average potential difference between all power conductors and a reference potential such as ground (earth). Similarly, the power port current is characterized by DM current and CM current. DM cu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/12H02M1/14H02J3/01H03H11/00
CPCH01F19/06H01F27/25H01F2017/0093H02M1/12H03H7/427H02M1/123
Inventor 西蒙·罗伯特·沃尔
Owner KERRYJ INVESTMENT
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