Slide 1: Typical Cores and Shields Geometries
Typical Cores and Shields Geometries Melexis Current Sensing Applications The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Slide 2: Two Different Solutions
Two Different Solutions Ferromagnetic Shields and Cores Ferromagnetic Core + Conventional Current Sensor Ferromagnetic shield + IMC Current Sensor All simulated Cores and Shields shown in this presentations are developed in collaboration with our ferromagnetic material supplier, Maglab/PML India. Fo
Slide 3: Typical Shields and Cores Geometries
Typical Shields and Cores Geometries I. Standard Un-laminated U-Shields • U12 • U20 • U25 • U30 II. Standard Laminated LU-shields • LU15 • LU20 • LU25 • LU30 III. Standard C-cores • C2.5 • C5 • C8 The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Slide 4: I. Standard Un-Laminated U-shields Design
I. Standard Un-Laminated U- shields Design The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Slide 5: Dimensions
Dimensions Ordering Code 2.5mm U-Shield –12 – 13 – 12.5 – 1.5 U-Shield –20 – 13 – 15 – 1.5 U-Shield –25 – 15 – 15 – 1.5 U-Shield –30 – 15 – 15 – 1.5 For more details about unlaminated shields Material U-shields : NiFe The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserve
Slide 6: Detailed Dimensions (Ux-z-y-th)
y Detailed Dimensions (Ux-z-y-th) z x U12 – 13 – 12.5 – 1.5 U20 – 13 – 15 – 1.5 U25 – 15 – 15 – 1.5 U30 – 15 – 15 – 1.5 The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Slide 7: Simulation models
Simulation models U12 U20 10mm 18mm 2mm 3mm U25 U30 23mm 28mm The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Slide 8: DC Simulations – Linearity and Saturation
DC Simulations – Linearity and Saturation 10 100 XHF 0 90 0 200 400 600 800 1000 1200 -10 80 -20 70 Non-Linearity [A] VHF NL_U12 -30 60 NL_U20 Bx Bx [mT] NL_U25 -40 50 NL_U30 B_U12 -50 40 B_U20 B_U25 -60 30 B_U30 HF -70 20 LF Magnetic field generated -80 10 @ sensor position -90 0 Current [A] The co
Slide 9: Stray Field Immunity
Stray Field Immunity 30 Bext Bs 2mm Shielding Factor = Bext / Bs 20 • Narrower shields show a better shielding factor. 10 • A high shielding factor ensures a good protection against external fields and cross-talk and therefore a high S/N ratio. 0 U12 U20 U25 U30 The content of this presentation is C
Slide 10: II. Standard Laminated LU-shields Design
II. Standard Laminated LU- shields Design The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Slide 11: Why Laminated Shields ?
Why Laminated Shields ? • The purpose of this presentation is to demonstrate the performances of standard laminated U shields. These shields are made of a stack of laminated ferromagnetic material (NiFe or SiFe). • The laminations allow reducing Eddy currents that appear in the shield when subjected
Slide 12: Dimensions
Dimensions 15mm Order code examples W L H T Type LU20-8-15-3-NiFe 20 8 15 3 NiFe LU20-8-15-3-SiFe 20 8 15 3 SiFe LU20-13-15-3-NiFe 20 13 15 3 NiFe Mechanical drawing: LU20-13-15-3-SiFe 20 13 15 3 SiFe L T LU25-8-18-3-NiFe 25 8 18 3 NiFe LU25-8-18-3-SiFe 25 8 18 3 SiFe W LU25-13-18-3-NiFe 25 13 18 3
Slide 13: Laminated Shields Models
Laminated Shields Models LU15 (Busbar 12x2mm) LU20 (Busbar 16x2mm) W15 W20 H15 H15 LU25 (Busbar 20x2mm) LU30 (Busbar 26x2mm) W25 W30 3mm H18 H18 The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Slide 14: DC Simulations – Linearity and Saturation
DC Simulations – Linearity and Saturation Shield Length = 13mm, material = NiFe 5 150 0 130 -5 110 -10 XHF 90 B_LU15 Non-Linearity [A] -15 B_LU20 70 VHF Bx [mT] B_LU25 -20 B_LU30 50 NL_LU15 2mm -25 NL_LU20 NL_LU25 HF 30 NL_LU30 -30 LF 10 -35 -40 0 200 400 600 800 1000 1200 1400 1600 -10 Magnetic fie
Slide 15: DC Simulations – Linearity and Saturation
DC Simulations – Linearity and Saturation Shield Length = 8mm, material = NiFe 50 130 110 0 XHF 90 -50 B_LU15 70 B_LU20 VHF Non-Linearity [A] B_LU25 Bx [mT] -100 50 B_LU30 NL_LU15 2mm NL_LU20 HF 30 NL_LU25 -150 NL_LU30 LF 10 -200 0 200 400 600 800 1000 1200 1400 1600 -10 Magnetic field generated @ s
Slide 16: Stray Field Immunity
Stray Field Immunity Bext Bs 2mm 25 20 Narrower shields shows a better Shield Factor [ = Bext/Bs] 15 shielding factor. A high shielding factor ensures a 10 good protection against external fields and cross-talk and therefore a high S/N ratio. 5 0 LU15 U15 LU20 U20 LU25U25 LU30 U30 The content of thi
Slide 17: III. Standard C-Cores Design
III. Standard C-Cores Design The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Slide 18: Typical Geometries
Typical Geometries Dimensions (Cgap – thickness – length) C2.5-4-3.8 C5-4.5-4.5 C8-6.3-8 The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Slide 19: C-Cores Simulation Models
C-Cores Simulation Models C2.5-4-4 C5-4.5-4.5 C8-6.3-8 Bus-bar : 4 x 2 mm Bus-bar : 10 x 3 mm Bus-bar : 25 x 3 mm The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Slide 20: DC Performances – Linearity and Saturation
DC Performances – Linearity and Saturation 20 400 10 360 0 320 0 250 500 750 1000 1250 1500 -10 280 -20 240 NL_C2.5-4-4 NL_C5-4.5-4.5 Bx [mT] Non-Linearity [A] -30 200 NL_C8-6.3-8 B_C2.5-4-4 -40 160 B_C5-4.5-4.5 B_C8-6.3-8 -50 120 Magnetic field generated -60 80 @ sensor position -70 40 (middle of t
Slide 21: Stray Field Immunity
Stray Field Immunity Bs Bext 70 60 50 Narrower air-gaps show a better Shielding Factor = Bext/Bs 40 shielding factor. 30 A high shielding factor ensures a good protection against external 20 fields and cross-talk and therefore 10 a high S/N ratio. 0 2.5mm 5mm 8mm Air-Gap dimension The content of thi
Slide 22: For additional questions, please fill and submit the technical inquiry form
For additional questions, please fill and submit the following technical inquiry form: https://www.melexis.com/en/contact/technical- inquiry The content of this presentation is CONFIDENTIAL & PROPRIETARY. ALL Rights Reserved.
Slide 23: Disclaimer
Disclaimer The content of this document is believed to be correct and accurate. However, the content of this document is furnished "as is" for informational use only and no representation, nor warranty is provided by Melexis about its accuracy, nor about the results of its implementation. Melexis as