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使用MFIA阻抗分析仪测量DC-Link电容器的低串联等效电阻(ESR)和低串联等效电感(ESL)

on 17.07.2019 at 14:59 by Meng on Blog of Meng Li
直流支撑电容器(DC-link 电容器)本身和接口的ESL和ESR对绝缘栅双极晶体管(IGBT)开关模组的性能有着很大的影响。当IGBT模组关闭时,瞬时产生的电压浪涌会储存在寄生电感之中。为了降低或者消除此电压浪涌的影响,设计低ESL的直流支撑电容器至关重要。在本文中,我们将使用MFIA阻抗分析仪和专用的低ESL阻抗测试夹具来验证标称的器件参数。在1 kHz到5 MHz的测试频率范围内,最低的串联等效电感(ESL)仅为9.5 nH (742 kHz),而最低的串联等效电阻(ESR)仅为0.7 mOhm (11 kHz)。

Measuring low ESL and low ESR of a DC-Link Capacitor with the MFIA Impedance Analyzer

on 10.06.2019 at 09:25 by Tim on Blog of Tim Ashworth
Introduction: This blog post describes how the MFIA (and MFLI with MF-IA option), can characterize the equivalent series inductance (ESL) and equivalent series resistance (ESR) of a DC-Link capacitor typically used in power inverters for electric vehicles. The ESR and […]

SPM community brought together in Zurich

on 03.06.2019 at 10:16 by Romain Stomp on Blog of Romain Stomp
Zurich Instruments User Meeting
“Jamais 2 sans 3,” as the French say, where number three worked as a charm. For this 3rd SPM User Meeting, we were able to host the meeting in our home city and brought together more users than ever before […]

使用MFIA阻抗分析仪表征超级电容器的串联等效电阻(ESR)

on 27.05.2019 at 14:48 by Meng on Blog of Meng Li
超级电容器(简称:超电容器)是应用广泛的储能装置,从小到SRAM,大到高铁都有应用。它的能量密度一般是传统电解质电容器的10−100倍以上。而和锂离子电池相比,虽然超级电容器的能量密度较低,但是功率密度却非常优秀。对电容器而言最主要的是以下三个参数:电容,漏电流,和串联等效电阻(ESR)。其中ESR能够反映器件自身发热。同时它还能显示器件的剩余寿命。在本文中,我们将使用MFIA阻抗分析仪,测量超级电容器在mHz到kHz频率范围段的动态ESR。使用阻抗分析对超级电容器造成的损耗较小,同时还能获取更多关于超级电容器内部工作原理的信息。与其他的阻抗分析仪相比,MFIA本身并不需要桥电路反馈,而是通过直接测量电流和电压来推导阻抗。这使得它能够轻易测量到低频率(mHz级别)的信号。ESR的最低值在46 Hz时仅0.33 mOhm。

Frequency-Domain Response of Lock-in Filters

on 19.03.2019 at 18:10 by Mehdi on Blog of Mehdi Alem
Introduction  The response of a lock-in amplifier is characterized by the parameters of its low-pass filter (LPF), i.e. time constant and filter order. The temporal response of the LPF demonstrates the latency of measurement while its spectral response shows the […]

Gated data transfer for increased data sampling rate on the MFIA and MFLI

on 19.12.2018 at 14:42 by Tim on Blog of Tim Ashworth
Introduction For measurements of signals which are rapidly changing, for example, when measuring capacitance transients in Deep Level Transient Spectroscopy (DLTS), high temporal resolution is required. In its standard operating configuration, the MFIA (or MFLI with MF-IA option) can sample […]

2nd Zurich Instruments Quantum User meeting London

on 03.12.2018 at 17:04 by Jelena on Blog of Jelena Trbovic
The 2nd Quantum Technology User Meeting is behind us and we are full of impressions and thankful to all the participants, especially our host Mark Buitelaar! The goal of the meeting was to foster networking among ZI Users & ZI friends […]

Square pulses for DLTS measurements on the MFIA

on 22.08.2018 at 16:00 by Tim on Blog of Tim Ashworth
Producing square voltage pulses and capturing capacitance transients This blog post shows how to produce square voltage pulses and capture the resulting capacitance transients on a short timescale (20 us) for example, for Deep-level Transient Spectroscopy (DLTS) measurements. Using the LabOne Threshold Unit […]

Rapid and Accurate C-V Measurements on the MFIA

on 19.08.2018 at 15:50 by Tim on Blog of Tim Ashworth
Fast C-V measurements up to 3000 V/s This blog post demonstrates the ability of the MFIA (also MFLI with MF-IA option) to measure capacitance on a short timescale (20 us) as a function of DC bias voltage, for example, for […]

How to Demodulate Multi-frequency Signals such as AM, FM and PM

on 20.03.2018 at 13:26 by Mehdi on Blog of Mehdi Alem
Introduction  When analyzing signals with multiple frequency components, it is important to measure the amplitude and phase of each frequency component accurately so that a change in the characteristics of one component does not affect the measurement of another frequency component. There […]

マルチチャネル任意波形ジェネレータ

on 20.12.2017 at 10:55 by Marco Brunner on Blog of Marco Brunner
製品 Zurich Instrumentsは、市場製品の中でも最高レベルのチャネル密度を実現し、トリガのレイテンシを最小限に抑えた任意波形ジェネレータであるHDAWGを発表します。HDAWGは4または8チャネル、いずれかの設定でお手元に届けられます。両方の設定において16ビットの出力およびチャネルあたり500MSamplesの信号キャッシュを実現します。最大サンプリング・レートは750MHzの信号帯域幅で2.4GSa/sで、各信号出力にはTTLマーカー出力とTTLトリガ入力が含まれます。さらに、複雑なビットパターンを作成し、読み取ることができる32ビットのデジタルI/Oが搭載されています。 説明 多くのチャネルが必要となる用途では、複数の機器を同期して集中的に制御することが可能です。HDAWGはブラウザベースのLabOneユーザーインターフェースや、MATLAB、LabView、Python、NET、Cで制御することができます。また、埋め込みのスクリプト言語とコンパイラを使用すれば、シーケンスを容易に書き込み、編集、コンパイルすることができます。取得されるシーケンスはリーンであり、1GbEまたはUSB3.0を介してスムーズに機器に転送することができます。そのため、時間を短縮してワークフローの効率を高めることができ、さらにユーザーは複雑な信号パターンの全体像を保守することが可能になります。 用途 HDAWGは、最小限のノイズでパルス信号のシーケンスを生成する量子計算での用途など、極めて厳しいR&D要件を満たすために開発されました。さらにNMR、電子部品試験、レーダー/ライダーなどの用途にも対応します。

Generation of Single-Sideband Modulation by Arbitrary Waveform Generators

on 15.12.2017 at 17:32 by Mehdi on Blog of Mehdi Alem
Introduction  I/Q modulations are extensively used in a variety of applications including telecommunications, quantum computing (QC), nuclear magnetic resonance (NMR), electron paramagnetic resonance (EPR) spectroscopy and band-excitation atomic force microscopy (AFM). In this post, we demonstrate how to generate such signals using Arbitrary […]

Enhancing the Luminosity Quality of Sulfur Plasma Lamps by the HF2PLL Phase-Locked Loop

on 07.12.2017 at 14:11 by Mehdi on Blog of Mehdi Alem
Introduction The choice of technology in lighting industry requires a trade-off between color rendering and luminous efficacy because the spectral sensitivity of the human eye varies with wavelength. As sustainable development has become a priority, the manufacturing industry of lighting […]

Formation sur les techniques KFM à Grenoble

on 29.11.2017 at 18:17 by Romain Stomp on Blog of Romain Stomp
Pour la seconde année consécutive, le réseau RéMiSoL (voir ci-dessous), avec le soutien du CEA LETI, de l’IEMN et de partenaires industriels (NanoAndMore, Zurich Instruments), a proposé une action nationale de formation (ANF) CNRS le 7 et 8 Novembre sur […]

Protect Setup From High Voltage Peaks

on 24.11.2017 at 11:24 by Marco Brunner on Blog of Marco Brunner
This blog describes how a setup can be protected from overvoltage which occurs switching off a coil. Fast changing currents induce transient voltages in an inductive load which can be expressed by the formula: V = – L (dI/dt) L is […]