Control method and control device of switching power supply and electronic equipment
A technology of switching power supply and control method, which is applied in the direction of high-efficiency power electronic conversion, output power conversion device, control/regulation system, etc., and can solve problems such as equipment failure and input current waveform distortion of switching power supply
Pending Publication Date: 2022-03-01
HUAWEI TECH CO LTD
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Problems solved by technology
Due to the impedance of the switching power supply and the existence of non-linear loads, the switching power supply will generate harmonic current during the working process, which will cause the input current waveform of the switching power supply to be distorted, and then cause the equipment connected to the switching power supply to malfunction.
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[0074] The technical solution in this application will be described below with reference to the accompanying drawings.
[0075] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the accompanying drawings in this application. Obviously, the described embodiments are part of the embodiments of this application , but not all examples. 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.
[0076] The terms "first" and "second" in the description, embodiments, claims and drawings of the present application are only used for the purpose of distinguishing descriptions, and cannot be interpreted as indicating or implying relative importance, nor can they be interpreted as indicating or imply...
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According to the control method and control device of the switching power supply and the electronic equipment, the current lower limit set value of the inductor in the switching power supply and the average value of the current instantaneous value actual value of the inductor are integrated, accurate control over the switching power supply can be achieved, meanwhile, the efficiency of the switching power supply is improved, and the harmonic current of the switching power supply is reduced. The trigger signal is obtained according to the current lower limit set value of the inductor in the switching power supply, the conduction time of the switching tube in the switching power supply is obtained according to the average value of the current instantaneous value actual value of the inductor, and then the switching tube is driven according to the trigger signal and the conduction time of the switching tube.
Description
technical field [0001] The present application relates to the field of energy technology, and more specifically, to a control method, control device and electronic equipment of a switching power supply in the field of energy technology. Background technique [0002] With the rapid development of science and technology, switching mode power supply (SMPS) has been widely used. Due to the impedance of the switching power supply and the existence of non-linear loads, the switching power supply will generate harmonic currents during the working process, which will cause the input current waveform of the switching power supply to be distorted, and then cause the equipment connected to the switching power supply to malfunction. Therefore, it is necessary to precisely control the harmonic current of the switching power supply. [0003] At the same time, in order to meet the portable requirements of terminal equipment (including switching power supply), it is necessary to make the s...
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IPC IPC(8): H02M1/12H02M1/42H02M1/08H02M1/088H02M3/156H02M7/219
CPCH02M1/12H02M1/4208H02M1/08H02M1/088H02M3/156H02M7/219Y02B70/10
Inventor 方晓厅郝金莉李闯鹏
Owner HUAWEI TECH CO LTD