数字电源浪涌抑制方法研究*

doi:10.11985/2024.01.024

摘要/Abstract

摘要：

对于通过前端浪涌防护模块对数字电源浪涌冲击进行抑制的方法，当浪涌能量过高时，存在浪涌防护模块通常无法有效抑制全部浪涌能量的问题。针对该问题，分析了浪涌的产生原因及特性，研究了浪涌在数字电源中的传递路径及在不同观测点的浪涌波形，进而提出了印刷电路板(Printed circuit board，PCB)布局优化、电路优化及磁屏蔽等数字电源浪涌抑制新方法。所提新方法原理简单、可靠性高，能使数字电源获得良好的浪涌抑制能力。研制了1.2 kW试验样机并进行浪涌测试试验，试验结果表明所提出的浪涌抑制新方法可抗4级浪涌试验，能够保障数字电源正常工作。

关键词: 数字电源, 浪涌抑制, PCB布局优化, 电路优化

Abstract:

For the method of suppressing surge impact in digital power through the front-end surge protection module, when the surge energy is too high, there is the problem that the surge protection module usually unable effectively suppress all surge energy. Aim at this problem, the causes and characteristics of surge are analyzed, the transmission path and waveform at different observation points of surge in digital power are studied, and then some new methods of digital power surge suppression such as printed circuit board(PCB) layout optimization, circuit optimization and magnetic shielding are proposed. The new method is simple in principle and high in reliability, it can make the digital power obtain good surge suppression ability. A 1.2 kW experimental prototype is developed and surge tested, the experimental results show that the proposed new surge suppression method can resist level 4 surge test, and it can guarantee the digital power regular work.

Key words: Digital power, surge suppression, PCB layout optimization, circuit optimization

中图分类号:

TM46

胡经纬, 王久和, 曲秋莳. 数字电源浪涌抑制方法研究^*[J]. 电气工程学报, 2024, 19(1): 226-234.

HU Jingwei, WANG Jiuhe, QU Qiushi. Research on Surge Suppression Method of Digital Power[J]. Journal of Electrical Engineering, 2024, 19(1): 226-234.

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参数	定义
T_w	波形上升至50%峰值后下降其峰值50%的时间间隔
T	电压波形由30%峰值上升至90%峰值所对应的时间间隔
T_r	电流波形由10%峰值上升至90%峰值所对应的时间间隔
T_f	“波前时间”，对于电压波形来说，T_f=1.67T，对于电流波形来说，T_f=1.25T_r
T_d	“半峰值时间”，对于电压波形来说，T_d=T_w，对于电流波形来说，T_d=1.18T_w

参数	数值/型号	备注
输入电压/V	AC220
主路输出电压/V	DC54
辅路输出电压/V	DkC12
开关频率/kHz	240
负载功率/kW	1.2
PFC电路开关管	IPW60R080P7	INFINEON公司
DC/DC部分原边开关管	IPW60R037P7	INFINEON公司
DC/DC部分副边整流管及续流管	FDMS86 350	Fairchild公司
AC/DC部分控制芯片	UCD3 138	TI公司
DC/DC部分控制芯片	UCD3 138	TI公司

测试电压/kV	L与N相位差/(°)
测试电压/kV	0	90	180	270
1	工作正常	工作正常	工作正常	工作正常
1.5	工作正常	工作正常	工作正常	工作正常
2	工作正常	工作正常	工作正常	工作正常

测试电压/ kV	L与N相位差/(°)				备注
测试电压/ kV	0	90	180	270	备注
1	工作正常	工作正常	工作正常	工作正常
2	工作正常	工作正常	工作正常	工作正常
3	工作正常	工作正常	工作正常	工作正常
3.5	工作正常	PFC电路MOSFET管损坏，主路电压无输出	工作正常	工作正常	优化PFC电路的PCB布局后通过该电压等级测试
4	工作正常	主路电压输出重启，数字控制芯片重启	工作正常	工作正常	对DC/DC部分数字芯片进行磁屏蔽后通过该电压等级测试