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Electromagnetic interference and electric shock-resistant network earthing method for large-capacity transducer

An anti-electromagnetic interference, grounding network technology, applied in the field of power electronics, can solve problems such as endangering safety, increasing the decoupling loop of noise signals, and accumulating charges, and achieves the effect of eliminating the phenomenon of electrification.

Inactive Publication Date: 2010-08-11
深圳市伟创电气有限公司
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  • Description
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Problems solved by technology

In actual use, due to point grounding or suspension grounding, the shielding effect of the cabinet is seriously reduced, and the decoupling loop of the noise signal is increased, which seriously affects the reliable operation of the large-capacity inverter. At the same time, the suspension of the cabinet (cabinet door) It will lead to a large amount of charge accumulation, which will cause the harm of static electricity to damage the equipment and the safety hazard of electric shock
The current grounding network can no longer meet the application requirements of large-capacity inverters

Method used

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  • Electromagnetic interference and electric shock-resistant network earthing method for large-capacity transducer
  • Electromagnetic interference and electric shock-resistant network earthing method for large-capacity transducer
  • Electromagnetic interference and electric shock-resistant network earthing method for large-capacity transducer

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the following embodiments:

[0014] A grounding network method for preventing electromagnetic interference and electric shock of a large-capacity frequency converter, which is mainly realized by the following methods:

[0015] First, design a grounding bolt on the lower right foot of each cabinet door of the large-capacity inverter, and design a grounding bolt on the cabinet frame corresponding to the grounding bolt of the cabinet door. The interface can easily remove the cabinet door. Its dedicated interface structure reference image 3 .

[0016] In addition, the sealing tape of the traditional large-capacity inverter is replaced with a conductive rubber belt. The cabinet door is made of electrolytic plate material, and the frame of the cabinet door adopts anti-adhesion means. Connection by way of connection to ensure the safety of the grounding of the cabinet door and the cabinet body and th...

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Abstract

The invention relates to an electromagnetic interference and electric shock-resistant network earthing method for a large-capacity transducer. The method is implemented mainly through the following steps of: designing one earthed bolt on the lower right leg of each cabinet door of the large-capacity transducer; designing one earthed bolt close to a cabinet body frame corresponding to the earthed bolt of the cabinet door; butting two interfaces special for the earthed bolts to realize earthed connection; in addition, using a conductive rubber belt to replace a sealing belt of the traditional large-capacity transducer; manufacturing the cabinet door by adopting an electrolytic board material, and adopting adhesion preventing means on a side frame part of the cabinet door; and connecting the cabinet door and the cabinet body through the conductive rubber belt in a surface earthed mode to ensure the safe earthing of the cabinet door and the cabinet body and the shielding and decoupling of electrical earthing.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to a grounding network method for preventing electromagnetic interference and electric shock for large-capacity frequency converters in the power automation control industry. Background technique [0002] At present, the grounding network of most large-capacity inverters in China usually adopts the method of point grounding in the cabinet and floating grounding of the cabinet body (cabinet door). In actual use, due to point grounding or suspension grounding, the shielding effect of the cabinet is seriously reduced, and the decoupling loop of the noise signal is increased, which seriously affects the reliable operation of the large-capacity inverter. At the same time, the suspension of the cabinet (cabinet door) It will lead to a large amount of charge accumulation, which will cause the harm of static electricity to damage the equipment and the safety hazard of electric shock. The c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/44H02H9/00
Inventor 贾飞
Owner 深圳市伟创电气有限公司
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