A high-voltage capacitor electric quantity warning and automatic discharge circuit
A technology of automatic discharge and high-voltage capacitors, which is applied in the field of three-phase electricity, can solve problems such as long natural discharge time, electric shock injuries to maintenance and debugging personnel, and achieve high safety effects
Pending Publication Date: 2019-01-04
上海华通企业集团有限公司
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Problems solved by technology
It is easy to cause electric shock injury to maintenance and debugging personnel
At the same time, the natural discharge time is relatively long
Method used
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[0037] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0038] The invention provides a high-voltage capacitor electricity warning and automatic discharge circuit, which is characterized in that, as figure 1 As shown, it includes a power module 1, an automatic discharge module 2, a discharge promotion module 3, a reference voltage module 4 and a power failure detection module 5, and the power module 1 includes an A-phase input 6, a B-phase input 7 and a C-phase input 8 ,
[0039] The phase A input 6 is connected to one end of the first resistor R1 and the first ca...
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A high-voltage capacitor electric quantity warning and automatic discharge circuit characterized in that it comprises a power supply module, an automatic discharge module, a discharge pushing module,a reference voltage module and a power-down detection module, wherein the power supply module comprises an A-phase input, a B-phase input and a C-phase input, the automatic discharge module comprisesa rectifier bridge, and the discharge pushing module comprises a photoelectric coupling element and a dual operational amplifier; The invention has the advantages that the rectifier bridge discharge adapts to the uncertainty of the storage polarity of the capacitor, and ensures that the electric quantity warns the LED lamp to be in a positive connection state; and the rectifier bridge discharge adapts to the uncertainty of the storage polarity of the capacitor. Comparing the 'reference' voltage with the 'equipment operating state signal' by operational amplifier, output a high-level or low-level, through the photoelectric coupling switch isolation, in the blackout time, start the automatic discharge circuit, safety is high.
Description
technical field [0001] The invention relates to the field of three-phase electricity, in particular to a high-voltage capacitor electricity warning and automatic discharge circuit. Background technique [0002] High-voltage capacitors (or power capacitors) have residual high voltage after the equipment is powered off, and have a large charge reserve. It is easy to cause electric shock injury to maintenance and debugging personnel. At the same time, the natural discharge time is relatively long. Contents of the invention [0003] The purpose of the present invention is to provide a high-voltage capacitor electricity warning and automatic discharge circuit. [0004] In order to achieve the above object, technical scheme of the present invention is: [0005] A high-voltage capacitor electricity warning and automatic discharge circuit is characterized in that it includes a power module, an automatic discharge module, a discharge push module, a reference voltage module and a...
Claims
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Login to View More IPC IPC(8): H02M1/32G01R29/24
CPCH02M1/32G01R29/24H02M1/322
Inventor 郑元昌张良杨吴昊陈贤卓赵克苏王小等王凯达王丽娟季苹向云松
Owner 上海华通企业集团有限公司