Electrical Energy Conversion and Energy Transformation System of Ship Deck Induction Heating Leveling Machine

Junnan LI; Chenfu FANG; Zhidong YANG; Fanchao QIN; Xinyi CHEN; Hongwei SUN

doi:10.7512/j.issn.1001-2303.2022.05.11

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Electrical Energy Conversion and Energy Transformation System of Ship Deck Induction Heating Leveling Machine
Vol. 52, Issue 5, Pages: 74-83(2022)
DOI： 10.7512/j.issn.1001-2303.2022.05.11

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李俊南，方臣富，杨志东，等.船舶甲板感应加热矫平机电能变换及能量转换系统［J］.电焊机，2022，52（5）：74-83.

LI Junnan, FANG Chenfu, YANG Zhidong, et al.Electrical Energy Conversion and Energy Transformation System of Ship Deck Induction Heating Leveling Machine[J].Electric Welding Machine, 2022, 52(5): 74-83.
李俊南，方臣富，杨志东，等.船舶甲板感应加热矫平机电能变换及能量转换系统［J］.电焊机，2022，52（5）：74-83. DOI： 10.7512/j.issn.1001-2303.2022.05.11.

LI Junnan, FANG Chenfu, YANG Zhidong, et al.Electrical Energy Conversion and Energy Transformation System of Ship Deck Induction Heating Leveling Machine[J].Electric Welding Machine, 2022, 52(5): 74-83. DOI： 10.7512/j.issn.1001-2303.2022.05.11.

摘要

船厂以往均采用火焰加热工艺矫平工艺平整甲板，容易引发火灾且平整效率较低。感应加热矫平工艺采用感应加热矫平机将三相正弦波高压小电流交流电变换成单相高频矩形波低压大电流交流电，并通过电磁、磁电转换在钢板中产生涡流热能和磁滞热能，快速、精准、可控地加热甲板特定区域。感应加热矫平机由固定式调功器、移动式调频器和小车式感应加热器通过电缆串联组成，突破了不能高效长距离输送高频低压大电流交流电的技术瓶颈；研发了变频器频率跟踪、调节及锁相技术，保证了输出回路为准纯电阻性态，高效利用电网电能；设计了小车式感应加热器，可按需移至任意区域施行矫平工艺，参数可就近调节。实验室测试和造船厂应用表明：船舶甲板感应加热矫平机电能变换及能量转换系统工作稳定可靠，可始终保证矫平机工作在准谐振状态，使感应加热器输出功率因数接近为1。

Abstract

Shipyards have previously used flame heating processes to level decks, which are prone to fires and have low leveling efficiency. The induction heating leveling process adopts an induction heating leveling machine to convert three-phase sine wave high-voltage small-current alternating current(AC) into single-phase high-frequency rectangular wave low-voltage high-current AC, and through electromagnetic and magnetoelectric conversion to produce eddy current heat and hysteresis heat in the steel plate to quickly, accurately and controllably heat specific areas of the deck. The induction heating leveling machine is composed of a fixed power regulator, a mobile frequency regulator and a trolley-type induction heater connected in series through cables, which breaks through the technical bottleneck that high-frequency, low-voltage, and high-current AC power cannot be efficiently transmitted over long distances. The frequency tracking, regulation and phase locking technology of the frequency converter was developed, which ensures the quasi-pure resistive state of the output circuit so as to efficiently utilize the grid power. A trolley type induction heater was designed, which can be moved to any area as required to carry out the leveling process and the parameters can be adjusted nearby. Laboratory tests and shipyard applications show that the electrical energy conversion and energy transformation system of ship deck induction heating leveling machine is stable and reliable, and can always ensure that the leveling machine works in a quasi-resonant state and the output power factor of the induction heater is close to one.

关键词

船舶甲板感应加热矫平准纯电阻性态准谐振状态

Keywords

ship deckinduction heatinglevelingquasi-pure resistive statequasi-resonant state

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