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Y capacitance asymmetry configuration circuit, circuit board, device and control method

A technology for configuring circuits, circuit boards, applied in the field of electricity

Active Publication Date: 2021-07-06
SHENZHEN POWER SUPPLY BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a Y capacitor asymmetrical configuration circuit, circuit board, device and control method for the problem of how to improve the safety of the equipment where the double Y capacitor circuit is located.

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  • Y capacitance asymmetry configuration circuit, circuit board, device and control method

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Embodiment Construction

[0036] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0037] The serial numbers assigned to components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "connection" ment...

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Abstract

The present application relates to a Y capacitor asymmetric configuration circuit, a circuit board, a device and a control method. The Y capacitor asymmetric configuration circuit includes a first capacitor, a second capacitor and a circuit breaker. The withstand voltage value of the first capacitor is greater than the voltage value of the power supply, and the withstand voltage value of the second capacitor is smaller than the voltage value of the power supply. When the first capacitor is damaged, all the power supply voltage is applied to both sides of the second capacitor. And because the withstand voltage value of the second capacitor is lower than the power supply voltage value, when the power supply voltage is all applied to both sides of the second capacitor, the second capacitor will be broken down, the positive and negative poles will be short-circuited, and the circuit breaker will be disconnected. Turn on and cut off the power to avoid electric shock accidents. The Y-capacitor asymmetrical configuration circuit avoids the problem of the double Y-capacitor circuit due to the grounding protection of the metal casing, and the potential of the metal casing rises to the power supply voltage. The Y capacitor asymmetrical configuration circuit improves the safety of the equipment where it is installed.

Description

technical field [0001] The present application relates to the field of electric power technology, in particular to a Y capacitor asymmetric configuration circuit, a circuit board, a device and a control method. Background technique [0002] In power electronic conversion equipment such as DC converters, in order to prevent the metal casing from being charged, the metal casing is usually grounded for protection. [0003] There are common-mode signals in the power supply of power electronic devices, and the switching action in power electronic devices will also form common-mode interference. In order to suppress their mutual interference; usually, a capacitor is installed between the positive and negative poles and the metal shell of the equipment, called It is a double Y capacitor circuit. The capacitance withstand voltage value of the double Y capacitor circuit is the same. When there is a problem with the grounding protection of the metal casing, the potential of the meta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32H02H7/12
CPCH02H7/1203H02M1/32H02M1/123
Inventor 陈思琳赵宇明罗欣儿卢旭
Owner SHENZHEN POWER SUPPLY BUREAU