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Improvements in the NIST Calibration Service for Thermal Transfer Standards

Thomas E. Lipe, Joseph R. Kinard, Yi-hua Tang, June E. Sims
2007 NCSLI Measure  
We report on multiple improvements made in the calibration services offered for thermal converters and thermal transfer standards in the ac-dc Difference Standards and Measurement Techniques Project at  ...  converters, and RF-dc difference calibrations -into a single service.  ...  In an effort to increase the efficiency of the ac-dc difference calibration services, all calibrations of thermal converters and thermal transfer standards have been consolidated in the ac-dc Difference  ... 
doi:10.1080/19315775.2007.11721360 fatcat:rfczgzshczba7o5gxhxb26i7oq

Thermal voltage converter calibrations using a quantum ac standard

Thomas E Lipe, Joseph R Kinard, Yi-Hua Tang, Samuel P Benz, Charles J Burroughs, Paul D Dresselhaus
2008 Metrologia  
much as an order of magnitude over traditional ac-dc transfer methods.  ...  We report on the first-ever use of a quantum ac source to calibrate a thermal transfer standard as part of the NIST calibration service for such devices, with reductions in calibration uncertainty of as  ...  Synchronized ac-ac measurements To remove the thermal effects present with dc voltage and to increase the speed of the measurements, we can measure the ac-ac differences at various frequencies relative  ... 
doi:10.1088/0026-1394/45/3/003 fatcat:awvt7s5hczaq7cd5fjdsxpm3se

An AC Josephson Voltage Standard for AC–DC Transfer-Standard Measurements

M. Merimaa, K. Nyholm, M. Vainio, A. Lassila
2007 IEEE Transactions on Instrumentation and Measurement  
Our ACJVS measurements agree with the uncertainty budget of ac-dc difference calibrations made of this transfer standard by use of conventional techniques.  ...  Using this system, we synthesized dc voltages and audio-frequency sine waves in order to measure ac-dc differences on the 22 mV and 220 mV ranges of a commercial thermal transfer standard.  ...  Deaver at the Fluke Primary Standards Laboratory for insights regarding the transfer standard.  ... 
doi:10.1109/tim.2007.891153 fatcat:7xwdsm5xtvbfhaohlyysnp6mmm

Establishing an AC JOsephson Voltage Standard at NRC

P.S. Filipski, M. Boecker, S.P. Benz, C.J. Burroughs
2010 CPEM 2010  
An experimental method of measuring corrections due to the probe leads is described and first results are reported.  ...  NRC recently established an AC Josephson Voltage Standard (ACJVS) system based on a NIST pulsedriven Josephson-junction array.  ...  Using an ac-dc transfer comparator, we compared ac-dc transfer differences of WS1 and WS2 twice, with and without the probe leads.  ... 
doi:10.1109/cpem.2010.5544218 fatcat:fbt4ogg2vzbjzfj2igqqpnesnq

Fast reversed DC measurements on thermal converters using a SINIS Josephson junction array

T. Funck, R. Behr, M. Klonz
2001 IEEE Transactions on Instrumentation and Measurement  
At higher frequencies, a systematic slope in the relative FRDC-DC voltage transfer difference versus the reversing frequency of about 10 7 /kHz has been observed, which could not be measured with the semiconductor  ...  Index Terms-Fast reversed DC (FRDC), Josephson arrays, Josephson voltage standard, superconductor-insulator-normal conductor-insulator-superconductor (SINIS), thermal converter.  ...  INTRODUCTION T HE FAST reversed dc method (FRDC) [1] - [3] is well established for the measurement of transfer differences in thermal converters due to thermoelectric effects.  ... 
doi:10.1109/19.918132 fatcat:6jjm4jqktffdfahtfgd6xzfd3e

Predictive permanent magnet synchronous generator based small-scale wind energy system at dynamic wind speed analysis for residential net-zero energy building

Asif Khan, Saim Memon, Zafar Said
2021 International Journal of Solar Thermal Vacuum Engineering  
In this paper, a predictive 20 kVA permanent magnet synchronous generator (PMSG) based small scale wind turbine is investigated at dynamic wind speed with a sensing control system to manage and monitor  ...  The maximum power generation capacity of the wind turbine is 20 kWh with 415 VAC and 50 Hz frequency. A storage system of 19.2 kWh that supplies the energy to the load side.  ...  Acknowledgment Authors would like to thank the research facilities support provided by the Solar Thermal Vacuum Engineering Research Group at London Centre for Renewable Energy Engineering at London South  ... 
doi:10.37934/stve.3.1.2949 fatcat:64kb62i6s5gr5bvkfwon6inmra

IPEMC - ECCE Asia 2020 Author Index

2020 2020 IEEE 9th International Power Electronics and Motion Control Conference (IPEMC2020-ECCE Asia)  
1162 Shouxiang Li A Family of Hybrid Step-up DC-DC Converters based on Switched-capacitor Converters 497 A Family of Switched-capacitor-based Hybrid DC-DC Converters with Continuously Adjustable  ...  Linqian Cheng An Optimized Start-up Method for Modular Cascaded AC/DC Power Electronic Transformer with Minimized Input-Inrush Current in Dual Active Bridge 2402 Lixin Yang Time-Domain Efficiency  ... 
doi:10.1109/ipemc-ecceasia48364.2020.9368053 fatcat:nkonperim5h47b6dl5iokvmg5y

Power Calibration Standard Based On Digitally Synthesized Sinewaves

N. Oldham
1985 IEEE Transactions on Power Apparatus and Systems  
calibration technique is described in which the ac to dc transfer is made  ...  The unit of electric power at 60 Hz is often derived using impedance bridge techniques iñ hich the alternating voltage is referred to the direct voltage standard through a thermal converter. .lI.nalternative  ...  The wattmeter selected uses a thermal 3119 converter to cOmparethe measured ac power to an internal dc reference with an uncertainty of less than 50 ppm[10J.  ... 
doi:10.1109/tpas.1985.318820 fatcat:p4ozeqvvyzd2fipnv6l5bv2boa

ECCE 2020 Index

2020 2020 IEEE Energy Conversion Congress and Exposition (ECCE)  
Converter based on a Three-Level Boost Converter [#1416] 6238 Robust Control based on Flatness Properties for a DC-DC Switching Power Converter [#1199] Martinello, Daniele Measurement of Rotor Thermal  ...  Charging Area Wireless Power Transfer Systems [#1371] 5474 Usama, Muhammad Precise Rotor Speed Measurement Method with Sinusoidal Coded Gearwheel Encoder for Spindle Motor Drive [#1331] 2712 Utsunomiya  ... 
doi:10.1109/ecce44975.2020.9236355 fatcat:sbl4a4gonrf77kylohb3nbmhqa

HYBRID POWER HARVESTER USING ENGINE SOURCE

A.Ahmed Meeran Mydeen, Kelwin Inasu, M. Venkatesh, C. Suthesh
2017 International Journal on Smart Sensing and Intelligent Systems  
This battery free generator captures energy from its environment transient thermal gradients as a main source, and vibration as a secondary source allowing early biasing of the generator and stores this  ...  ULTRA CAPACITOR DC POWER BANK UNIT RELAY UNIT DC TO AC CONVERTER AC LOAD UNIT MINI HOME APPLIANCES TRANSCIENT THERMAL GRADIENTS THERMAL ELECTRICAL GENERATOR ( TEG ) ANALOG TO  ...  This detecting strategy has the capacity of detecting both element speeding up (i.e. stun or vibration) and static acceleration (i.e. slant or gravity).The differential capacitance is measured utilizing  ... 
doi:10.21307/ijssis-2017-246 fatcat:rkpkrpoo65d5dfuk5kjf4hzbf4

Piezoresistive and self-actuated 128-cantilever arrays for nanotechnology applications

I.W. Rangelow, Tzv. Ivanov, K. Ivanova, B.E. Volland, P. Grabiec, Y. Sarov, A. Persaud, T. Gotszalk, P. Zawierucha, M. Zielony, D. Dontzov, B. Schmidt (+15 others)
2007 Microelectronic Engineering  
A packaged VLSI NEMS-chip (Very Large Scale Integrated Nano Electro Mechanical System) incorporating 128 proximal probes, fully addressable with control and readout interconnects and advanced software  ...  A major limitation for future nanotechnology, particularly for bottom-up manufacturing is the non-availability of 2-dimensional massively parallel probe arrays.  ...  The amplitude of the cantilever vibration has been measured at the DC output of the high sensitivity AC/RMS converter.  ... 
doi:10.1016/j.mee.2007.01.219 fatcat:um7eipvhizhedjbyitctklom4m

An Active Power Coordination Control Strategy for AC/DC Transmission Systems to Mitigate Subsequent Commutation Failures in HVDC Systems

Xia Zhou, Cangbi Ding, Jianfeng Dai, Zhaowei Li, Yang Hu, Zhaohui Qie, Feng Xue
2021 Electronics  
In order to cope with these effects, a power coordination control strategy for the AC/DC transmission system with high-proportion wind power is proposed.  ...  Subsequent commutation failures (CFs) in HVDC systems will cause large-scale power flow transfer in AC/DC transmission systems and lead to overload risk in HVAC systems.  ...  the active power output of sending-end AC system in the AC/DC transmission system with high-proportion wind power, and the thermal power plants may effectively  ... 
doi:10.3390/electronics10233044 fatcat:5eyctit4u5fmvdkj5w7sqe7fpy

2019 Index IEEE Transactions on Transportation Electrification Vol. 5

2019 IEEE Transactions on Transportation Electrification  
., +, TTE March 2019 3-20 AC-AC power converters Investigation on the Selection and Design of Step-Up/Down 18-Pulse ATRUs for More Electric Aircrafts.  ...  ., +, TTE Sept. 2019 795-811 AC-DC power converters A Bidirectional Soft-Switched DAB-Based Single-Stage Three-Phase AC-DC Converter for V2G Application.  ... 
doi:10.1109/tte.2020.2973824 fatcat:bnlf3wpmjjh67mdgavnvzfvjgi

Thermal analysis of induction and synchronous reluctance motors

A. Boglietti, A. Cavagnino, M. Pastorelli, D. Staton, A. Vagati
2006 IEEE transactions on industry applications  
A direct comparison of the thermal behavior of the two motor types has been thus made, for constant load and constant average copper temperature conditions.  ...  Using a lumped parameter simulation program, a thermal analysis has been also carried out and the obtained results have been compared to the experimental ones.  ...  Thermal test with DC supply This test is performed with the motor supplied by a DC voltage and is the base for the thermal model set up.  ... 
doi:10.1109/tia.2006.873668 fatcat:nby7g2nkjfetbpnyhvqn7y5hgm

Modelling and control of hybrid UPS system with backup PEM fuel cell/battery

Yuedong Zhan, Hua Wang, Jianguo Zhu
2012 International Journal of Electrical Power & Energy Systems  
This paper describes the dynamics modelling of a practical and cost-effective DC/DC converter, DC/AC inverter and AC/DC rectifier for an uninterruptible power supply (UPS) system with backup proton exchange  ...  The performances of the proposed power converters and PEMFC generating system are evaluated by experimental results, showing that the developed hybrid UPS system with backup PEMFC and battery power sources  ...  /DC and DC/AC power converters.  ... 
doi:10.1016/j.ijepes.2012.03.046 fatcat:j3cqzclvdfbghnzuraibhzotau
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