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Sampling circuit, sampling control method and power supply equipment

A technology for sampling circuits and power supply equipment, applied in control/regulation systems, measuring current/voltage, electrical components, etc., can solve problems such as power failures and power accidents of power supply equipment, and achieve the effect of avoiding power failures or power accidents

Active Publication Date: 2020-09-18
SUNGROW POWER SUPPLY CO LTD
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Problems solved by technology

[0003] When the main circuit is in the normal working state, the leakage current can be ignored; however, when the main circuit is in the standby state, that is, when a certain power receiving port on the power supply device is suspended and other special circumstances, the leakage current will be in the power receiving port. Or a floating voltage is formed on the internal key circuit, which will cause power failure or power accident on the power supply equipment

Method used

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  • Sampling circuit, sampling control method and power supply equipment
  • Sampling circuit, sampling control method and power supply equipment
  • Sampling circuit, sampling control method and power supply equipment

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Embodiment Construction

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0047] In this application, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. an actual relationship or order. Moreover, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements inc...

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Abstract

The invention provides a sampling circuit, a sampling control method and power supply equipment. The sampling circuit is used for sampling the voltage of any sampling target in the power supply equipment; at least one first switch is arranged in a leakage current path of the sampling circuit; for the first switch, only when the sampling circuit carries out voltage sampling on the sampling target,the sampling circuit is in an on state, and when the sampling circuit does not carry out voltage sampling on the sampling target, the first switch is in an off state; because the sampling time of thesampling circuit is not long enough to enable the leakage current in the leakage current path to form suspension voltage on the sampling target, the sampling circuit can avoid the problem of power failure or power accident caused by the leakage current brought by sampling judgment.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a sampling circuit, a sampling control method and power supply equipment. Background technique [0002] Usually, in order to achieve its own power control and overvoltage and undervoltage protection, power supply equipment will set up multiple voltage sampling circuits at its own input port, output port, and key internal circuits (such as DC bus capacitors), and these voltages The sampling circuit is usually connected to the same control circuit. Therefore, between the input port, the output port and the key internal circuit, a power path other than its main circuit is formed. When there are at least two voltage sampling circuits sampling the corresponding voltage, A leakage current is formed in this conduction path. [0003] When the main circuit is in the normal working state, the leakage current can be ignored; however, when the main circuit is in the standby state,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156H02M1/32G01R19/165
CPCG01R19/16576H02M1/32H02M3/156
Inventor 俞雁飞张涛李晓迅
Owner SUNGROW POWER SUPPLY CO LTD
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