Y capacitor asymmetric configuration circuit, circuit board, device thereof and control method
A technique for configuring circuits, asymmetry, applied in the field of electricity
Active Publication Date: 2020-04-14
SHENZHEN POWER SUPPLY BUREAU
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- Application Information
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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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[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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The invention relates to a Y capacitor asymmetric configuration circuit, a circuit board, a device thereof and a control method. The Y capacitor asymmetric configuration circuit comprises a first capacitor, a second capacitor and a circuit breaker. The withstand voltage value of the first capacitor is larger than the voltage value of the power supply, and the withstand voltage value of the secondcapacitor is smaller than the voltage value of the power supply. When the first capacitor is damaged, power supply voltage is completely applied to two sides of the second capacitor. Because the withstand voltage value of the second capacitor is smaller than the power supply voltage value, when the power supply voltage is completely applied to the two sides of the second capacitor, the second capacitor is broken down, the anode and the cathode are short-circuited, a circuit breaker is disconnected, the power supply is cut off, and an electric shock accident is avoided. The Y capacitor asymmetric configuration circuit avoids the problem of the double-Y capacitor circuit due to the grounding protection of the metal shell, and the potential of the metal shell rises to the power supply voltage. The Y-capacitor asymmetric configuration circuit improves the safety of equipment where the Y-capacitor asymmetric configuration circuit is located.
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] The power supply of the power electronic device has a common-mode signal, and the switching action in the power electronic device will also form a 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...
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Login to View More 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