Front protection circuit for DC power supply

A technology of pre-protection and DC power supply, which is applied in the agricultural field, can solve problems such as overvoltage, harmonics and complex structure, and achieve the effects of stable inductance value, convenient use, and large interference frequency impedance
CN106208652AInactive Publication Date: 2016-12-07CHENGDU ZHIRENSHANYONG INFORMATION TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHENGDU ZHIRENSHANYONG INFORMATION TECH CO LTD
Publication Date
2016-12-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a front protection circuit for a DC power supply. The front protection circuit is characterized by comprising a 220V AC power supply P1, wherein the 220V AC power supply P1 is connected to a signal input end of an overvoltage protection circuit (1); an output end of the overvoltage protection circuit is connected to an interference filter circuit (2); and an output end of the interference filter circuit (2) is connected to a rectifier filter circuit (3). The circuit solves the problems of overvoltage, harmonic and complicated structure in a front end AC power circuit of the DC power supply.
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Description

technical field

[0001] In the field of agriculture, the invention particularly relates to a DC power supply pre-protection circuit. Background technique

[0002] Recently, due to the development of semiconductor and battery manufacturing technologies, etc., various devices such as mobile communication terminals, PDAs, notebook computers, and portable audio devices are used in the field of modern agriculture. Modern agricultural field equipment is in a high heat and high humidity environment, and the DC power supply used by modern agricultural field equipment is easily damaged. The reason is that there are many overvoltages and harmonic components in the AC power supply circuit at the front end of the DC power supply. Contents of the invention

[0003] The purpose of the present invention is to solve the problems of overvoltage, harmonics and complex structure in the AC power supply circuit at the front end of the DC power supply.

[0004] In order to achieve the above obj...

Claims

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