A step-down chopper circuit
A chopper circuit and inductance technology, which is applied in the direction of electrical components, electric variable adjustment, output power conversion devices, etc., can solve problems such as harmonic pollution, intermittent input current, electromagnetic interference, etc., to reduce harmonic pollution, The effect of improving the step-down efficiency
Active Publication Date: 2019-10-22
GUANGDONG UNIV OF TECH
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Problems solved by technology
The traditional Buck circuit has the advantages of continuous output current and small output ripple, but has the disadvantage of intermittent input current (the current input from the power supply to the device). Intermittent input current often causes many problems such as harmonic pollution and electromagnetic interference.
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[0020] The core of the present invention is to provide a step-down chopper circuit, the step-down chopper circuit realizes the function of step-down, also realizes the continuous input current, reduces the influence of harmonic pollution, electromagnetic interference and other problems, improves step-down efficiency.
[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.
[0022] Please refer to...
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The invention discloses a step-down chopper circuit, comprising a first inductance, a second inductance, a first capacitor, a second capacitor, a switch and a unidirectional conduction module, the first end of the first inductance is connected to the positive end of a power supply, The second end of the first inductance is respectively connected to the first end of the first capacitor, the first end of the second inductance and one end of the load, and the second end of the first capacitor is respectively connected to the first end of the switch and the one-way conduction module. The positive end is connected to the other end of the load, the second end of the second inductance is respectively connected to the first end of the second capacitor and the negative end of the unidirectional conduction module, and the second end of the second capacitor is respectively connected to the second end of the switch and the negative end of the unidirectional conduction module. Negative terminal connection of the power supply. The step-down chopper circuit provided by this application has an output voltage of D*V d , to achieve the function of step-down. The present application also sets the first inductor at the positive end of the power supply, which realizes continuous input current, reduces the influence of problems such as harmonic pollution and electromagnetic interference, and improves the step-down efficiency.
Description
technical field [0001] The invention relates to the technical field of voltage conversion, in particular to a step-down chopper circuit. Background technique [0002] Step-down circuits are used in many occasions. The traditional step-down circuit usually adopts Buck circuit, figure 1 It is a schematic structural diagram of a traditional Buck circuit. The traditional Buck circuit has the advantages of continuous output current and small output ripple, but has the disadvantage of intermittent input current (the current input from the power supply to the device). Intermittent input current often causes many problems such as harmonic pollution and electromagnetic interference. . [0003] Therefore, how to provide a solution to the above technical problems is a problem that those skilled in the art need to solve at present. Contents of the invention [0004] The purpose of the present invention is to provide a step-down chopper circuit, the step-down chopper circuit realiz...
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IPC IPC(8): H02M3/04H02M3/155
CPCH02M3/04H02M3/155H02M1/0083
Inventor 张桂东陈浩东郑培伟陈思哲章云
Owner GUANGDONG UNIV OF TECH