منابع مشابه
AC to DC Converter for Low Voltage Small Scale Generator
AC-DC single-stage converters are attractive because of their simplicity. The conventional power electronics converters used for such application have two stages, a diode bridge rectifier at the front end followed by a dc-dc boost converter. However, the extremely low output voltage of electromagnetic microgenerator does not allow diode bridge rectification. Even if possible, the losses in the ...
متن کاملAC-DC Difference Characteristics of High- Voltage Thermal Converters
This paper describes a study of high-voltage thermal converters (HVTC's) at voltages above 100 V at frequencies up to 100 kHz. Techniques for the construction of HVTC's are described, and the effects of aging and dielectric loss on the resistor, changes in the timing sequence of ac-dc difference tests, relay dead-times, warmup times, and voltage level dependence are given.
متن کاملCalibration of Ac-dc Voltage Transfer Standards at Inmetro
The aim of this work is to present the AC-DC transfer calibration system of Voltage and Current Laboratory (Latce) of brazilian's Instituto Nacional de Metrologia, Normalização e Qualidade Industrial (Inmetro). Latce is responsible for the realizations of both the volt and the ampère in accordance to SI, and for it's dissemination through the network of accredited laboratories in Brazil, so as ...
متن کاملAC-DC Transfer Standard Measurements Using An AC Josephson Voltage Standard
NIST is implementing the Josephson arbitrary waveform synthesizer as an ac Josephson Voltage Standard (ACJVS). Over the past few years we have demonstrated precise measurements of synthesized sine waves at rms voltage amplitudes up to 170 mV. The system can generate a variety of precision voltage outputs including dc voltages and ac sinewaves, so it can be used as a quantum-based voltage source...
متن کاملAn AC Josephson Voltage Standard for AC-DC Transfer-Standard Measurements
In order to improve the National Institute of Standards and Technology (NIST) low-voltage calibration service for thermal-voltage converters, we have constructed an ac-Josephsonvoltage-standard (ACJVS) system that can synthesize accurate rms voltages of up to 100 mV. Using this system, we synthesized dc voltages and audio-frequency sine waves in order to measure ac–dc differences on the 22 mV a...
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ژورنال
عنوان ژورنال: IEEJ Transactions on Fundamentals and Materials
سال: 1976
ISSN: 0385-4205,1347-5533
DOI: 10.1541/ieejfms1972.96.503