Current sharing method of centralized control type interleaved parallel circuit, computer readable storage medium and centralized control type interleaved parallel circuit

A technology of centralized control and formula calculation, applied in control/regulation systems, conversion of AC power input to DC power output, electrical components, etc. Effect

CN114696638APending Publication Date: 2022-07-01VERTIV CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-07-01

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Abstract

The invention relates to a current sharing method of a centralized control type interleaving parallel circuit, which comprises the following steps of: setting the duty ratio of a first parallel circuit in the interleaving parallel circuit as a first duty ratio, and setting the duty ratio of a second parallel circuit in the interleaving parallel circuit as a second duty ratio; based on the first duty ratio; and the ratio of the voltage difference value of the input voltage sampled at the zero crossing point of the triangular carrier wave of the first parallel circuit and the input voltage sampled at the periodic value to the bus voltage value of the interleaved parallel circuit is set as a second duty ratio compensation amount which ensures that the currents of the two parallel circuits are equal when one switching period is ended. The invention further relates to a computer readable storage medium and a centralized control type interleaving parallel circuit. According to the invention, the problem of non-uniform current between circuits can be solved in a low-cost and easy-to-implement manner, and the sine degree of the second parallel circuit is improved.
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Description

technical field

[0001] The present invention relates to the field of interleaved parallel circuits, and more particularly, to a current sharing method of a centrally controlled interleaved parallel circuit, a computer-readable storage medium and a centrally controlled interleaved parallel circuit. Background technique

[0002] Compared with the low-power circuit, the EMI circuit and energy storage filtering parameters of the high-power circuit are correspondingly increased, and the requirements for the current stress of the switching tube are relatively large. In order to realize the miniaturization and light weight of the product, the staggered parallel technology is introduced. The staggered parallel connection can reduce the inductor current ripple and the switch tube current stress, and can reduce the circuit parameters and improve the power density. Interleaved parallel control can be achieved by centralized or decentralized control methods. Distributed can improve th...

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Embodiment Construction

[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0029] The present invention relates to a current sharing method of a centrally controlled staggered parallel circuit, comprising: setting the duty cycle of a first parallel circuit in the staggered parallel circuit to a first duty cycle, and setting a second parallel circuit in the staggered parallel circuit The duty cycle of the circuit is set as the second duty cycle; the compensation amount of the second duty cycle that can ensure that the currents of the two parallel circuits are equal at the end of one switching cycle is derived, and its expression is: The ratio between the voltage d...