An Integrated TMR-Based Current Sensing Solution for WBG Power Modules and Converters

被引:0
作者
Vala, Sama Salehi [1 ]
Mirza, Abdul Basit [1 ]
Luo, Fang [1 ]
机构
[1] SUNY Stony Brook Univ, Dept Elect & Comp Engn, Stony Brook, NY 11790 USA
来源
IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY | 2024年 / 14卷 / 12期
基金
美国国家科学基金会;
关键词
Sensors; Magnetic sensors; Current measurement; Temperature sensors; Temperature measurement; Multichip modules; Magnetic field measurement; Capacitive coupling; current sensing; differential output; power converters; power modules; signal-to-noise ratio; skin effect; slitted design; tunneling magnetoresistance (TMR); wide bandgap (WBG); PROTECTION;
D O I
10.1109/TCPMT.2024.3392483
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This article proposes a contactless and high-precision current measurement solution using tunneling magnetoresistance (TMR) sensors to address the challenges of current measurement in wide bandgap (WBG) power electronics with high dv/dt, di/dt and switching frequencies. The solution, referred to as two TMR sensor (TTS), utilizes TTSs placed on opposite sides of the current-carrying trace, which can be printed circuit board (PCB) or bus bar-based. At first, the derivation and working principle of the TTS technique is presented, followed by its design and validation on an in-house developed SiC-based power module and power converter. A slitted PCB terminal design with minimum parasitic capacitance is proposed for the power module to alleviate skin effects and simplify sensor placement. The slitted terminal design is tested at 50 A and 70 kHz square wave pulse. Similarly, for the power converter, a bus bar-based TTS design is developed and compared with the existing shunt-based current measurement in continuous testing at 500 V and 3.5 kW. The TTS solution outperforms the shunt measurement with high SNR and bandwidth.
引用
收藏
页码:2220 / 2230
页数:11
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