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Power supply control method, power supply module and storage medium

A technology of power control and power supply, applied in the field of power supply, can solve problems such as large fluctuations in power output power and poor heating effect, and achieve the effects of improving stability, reducing ripple effects, and improving stability

Active Publication Date: 2021-06-11
BYD CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this scheme does not effectively control the periodic ripple of the output voltage and current of the step-down conversion circuit caused by uncontrolled rectification, which leads to large fluctuations in the output power of the entire power supply and poor heating effect

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  • Power supply control method, power supply module and storage medium
  • Power supply control method, power supply module and storage medium
  • Power supply control method, power supply module and storage medium

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Embodiment Construction

[0027] Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary, and embodiments of the present invention are described in detail below.

[0028] In the prior art, since the front-end input of the power supply is uncontrolled rectification, and the rectified voltage contains AC voltage 6 times the frequency ripple, such as the AC grid 50Hz, the rectified voltage contains 300Hz periodic ripple, resulting in the same The periodic ripple of the frequency means that the output power of the inverter circuit fluctuates periodically at the same frequency, which significantly affects the functional effect of the load. Some schemes reduce the voltage ripple by adding a large capacitor filter on the rectifier output side, but this method will cause a significant increase in the harmonics of the AC current and seriously affect the quality of the AC power grid.

[0029] In order to solve the above proble...

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Abstract

The invention discloses a power supply control method, a power supply module and a storage medium. The power supply control method comprises the following steps of acquiring a target current value and an actual current value of a step-down conversion circuit, calculating a current difference value between the target current value and the actual current value, acquiring a first duty ratio according to the current difference value, conducting iterative calculation on the current difference value in the current power supply period and the current difference value in the previous power supply period to obtain a second duty ratio, and using the second duty ratio for generating a current signal opposite to the ripple current, and correcting the first duty ratio according to the second duty ratio to obtain an actual control duty ratio of the step-down conversion circuit, and controlling a switching tube of the step-down conversion circuit according to the actual control duty ratio. The method can reduce the ripple influence and improve the power supply stability of the power supply.

Description

technical field [0001] The present invention relates to the field of power supply technology, in particular to a power supply control method, a power supply module and a storage medium. Background technique [0002] Induction heating power supply has the advantages of high efficiency, fast heating, reliable process quality, easy control, good environmental and working conditions, and easy implementation of mechanization, automation and assembly line production, etc., and has been increasingly widely used in various industries. [0003] In the related technology, an induction heating application is proposed in a constant current and constant power control system of an induction heating leveling machine power regulator, in which, during the crystal growth process of the crystal growth furnace, it is necessary to ensure that the temperature control is accurate and does not fluctuate Otherwise, all materials will be scrapped, and the requirement for small temperature fluctuation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/458
CPCH02M5/458Y02B70/10
Inventor 景剑飞孙嘉品
Owner BYD CO LTD
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