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Circuit, system, method and controller for suppressing common-mode interference

A common-mode interference and common-mode suppression technology, applied in the fields of methods and controllers, circuits for suppressing common-mode interference, and systems, can solve the problem of reducing the reliability of the conversion circuit, polluting the surrounding electromagnetic environment, power supply systems, power grids, and the operation quality of adjacent equipment. Influence and other issues, to achieve the effect of improving electromagnetic performance and reducing common mode interference

Pending Publication Date: 2022-03-22
GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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  • Description
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Problems solved by technology

However, its high-frequency on and off working characteristics will generate a large amount of EMI (Electromagnetic interference, electromagnetic interference), which will seriously pollute the surrounding electromagnetic environment and power system, which will not only reduce the reliability of the conversion circuit itself, but also make the power grid and adjacent equipment run quality suffers

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  • Circuit, system, method and controller for suppressing common-mode interference
  • Circuit, system, method and controller for suppressing common-mode interference
  • Circuit, system, method and controller for suppressing common-mode interference

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Embodiment Construction

[0029] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.

[0030] At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0031] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way intended as any limitation of the disclosure, its application or uses.

[0032] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of t...

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Abstract

The invention discloses a circuit, a system, a method and a controller for suppressing common-mode interference, and relates to the technical field of power electronics. The circuit comprises a sampling circuit which is configured to collect a common-mode interference signal of a parasitic capacitor between a casing and a grounding end of a controller; the controller is configured to output a control signal to the injection circuit according to the common-mode interference signal acquired by the sampling circuit; and an injection circuit configured to inject an adjustment signal to the chassis according to the control signal output by the controller to suppress the common-mode interference signal. Through mutual cooperation of the sampling circuit, the controller and the injection circuit, the adjusting signal is injected into the casing, common-mode interference can be reduced, and the electromagnetic performance of equipment is improved.

Description

technical field [0001] The present disclosure relates to the technical field of power electronics, in particular to a circuit, system, method and controller for suppressing common-mode interference. Background technique [0002] With the development of power electronics technology and electronic information industry, more and more various power electronic devices have entered people's life and production. For example, they have been widely used in household appliances such as refrigerators, washing machines and air conditioners. [0003] Due to the advantages of small weight, light volume, high efficiency, and stable performance, switching power converters have been rapidly developed and widely used in power supplies. However, its high-frequency on and off working characteristics will generate a large amount of EMI (Electromagnetic interference, electromagnetic interference), which will seriously pollute the surrounding electromagnetic environment and power system, which wil...

Claims

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Application Information

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IPC IPC(8): H02M1/44H02M1/12
CPCH02M1/44H02M1/126
Inventor 贺小林杨帆赵浩郑嘉良
Owner GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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