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This paper presents a new gate driver concept that consists of an integrated measurement of the junction temperature and the load current of a power module during inverter operation. For junction temperature measurement the gate driver identifies the temperature sensitive on-chip internal gate resistor by means of a small identification signal that is modulated onto the positive gate voltage. To determine...
The paper considers the method for measurement of active and inductive resistances of the power line supplying career excavators based on mathematical processing of current and voltage at the input of the excavator in two modes of operation — power consumption and power recuperation during the excavation cycle. Parameters of measurement errors when using the line transducers of different class index...
Development and research for power converters is focused on high power density, high modularity, low costs as well as high reliability and efficiency. The use of multilevel converters, like Neutral Point Clamped (NPC) Converters, in high power applications in the range of 1.5 MW up to 6MW can be favorable because of the filter size reduction and therefore reduction of weight and total volume of the...
To address lack of reliable power supplies for lightning current measurement systems (LCMSs), this paper proposes a novel type of self-powered LCMS. The required operational power consumption of the LCMS can be harvested using a power coil from the large lightning current which is being measured such that the system can be energized to complete a single-cycle signal measurement and data record. The...
In the field of wireless power transfer technologies, the improvement of transmission efficiency is one of the critical issues. It is important to understand how much power loss is imposed in which areas of a wireless power transfer system in the development phase. Since the transmission characteristics change according to ambient conditions, a measuring instrument capable of observing electric power...
In order to measure the harmonic current emission of equipment in accordance with IEC standards, a measurement setup (voltage source, measurement equipment) with a specified accuracy and reproducibility is required. One possibility to verify its accuracy is the measurement of a set of reference loads with known harmonic emission and a comparison of measured and calculated values. However, laboratory...
In this paper, the authors propose a methodology to guide verification of single phase reactive power meters under non sinusoidal conditions. At first, it is presented a brief review about different definitions of reactive power proposed in literature. Then a test signal for the detection of the implemented approach without a priori knowledge provided by the manufacturer was designed and numerically...
90 kW frequency converter driven synchronous reluctance machine losses are determined simultaneously with the input-output powers and with the calorimetric method. Uncertainty of both measurement methods is analyzed and discussed. Calorimetric measurement system that is capable to determine the losses of the motor frame size up to 315 is introduced.
With the advantage of high bandwidth and small insertion impedance, a current surface probe (CSP) used to measure switching current waveforms is presented in this paper. Its transfer impedance is characterized and validated in the first time by measuring an IGBT switching current with a passive current probe (CP) and a Hall effect current probe (HECP). It is also shown that a return current beneath...
In order to perform traceable measurements of the electrical parameters of solid-state lightning (SSL) products, it is essential to technically adequately define the measurement procedure and to identify the relevant uncertainty sources. This paper fills the related gaps in the present written standard for testing SSL products. New uncertainty sources with respect to conventional lighting sources...
Rapid changes in the development of electronic fabrication have lead us to have chalenges in supporting the researches. When a prototype of devices has to be examined and analyze, it needs to take some measurements that sometimes take time, not recorded, uncontinous measurement, and need a lot of devices to do it. In this paper, a tool to solve the problem in development of electronic fabrication...
This paper discusses energy consumption reduction in Zigbee based networks. We introduce energy consumption benchmarking platform (ECBP) - a versatile data acquisition based energy consumption profiling system for WSNs. The ECBP can be utilized to find power intensive processes in a given system, discover energy consumption anomalies and wasted power, measure active duty and sleep cycles, measure...
Making wireless sensor node platforms energy efficient is one of the major research thrusts in the sensor network community. Energy metering lies at the foundation of this research, either by providing direct measurements for profiling, or by serving as the base for the formulation and fitting of energy usage models. Most of the literature and tools, however, make their measurements on a very small...
The paper deals with the measurement of the influence of new technology household appliances on the power quality. A virtual instrument for power quality monitoring based on NI LabVIEW™ platform and simultaneous measurements of electrical voltages and currents, as well as powers, frequency, voltage variations, magnitude of rapid voltage changes, flicker severity, voltage unbalance and total harmonic...
This paper proposes a two-level hybrid state estimation method for power systems with SCADA and PMU measurements. A power system is decoupled into PMU observed areas and SCADA observed areas based on its system measurement configuration and topology connectivity, and the states of areas are solved by a two-level computational procedure. The first level uses PMU measurements and pseudo measurements...
Base band stations for Long Term Evolution (LTE) communication processing tend to rely on over-provisioned resources to ensure that peak demands can be met. These systems must meet user Quality of Service expectations, but during non-peak workloads, for instance, many of the cores could be placed in low-power modes. One key property of such application-specific systems is that they execute frequent,...
Measurement equipment for process control in the chemical industry has to face severe restrictions due to safety concerns and regulations. In this work, we discuss the challenges raised by safety concerns and explain how they lead to strong power and energy constraints in the design of industrial measurement equipment. We argue that a comprehensive strategy in the design and implementation of hardware...
This paper presents an improved and cost effective methodology for power loss measurement in power electronic switches. The suggested methodology improves the speed and the accuracy of the measurement, using a digital oscilloscope and a specialized current probe for the data acquisition and MATLAB programming for loss calculation.
A development system for testing integrated circuits used for power and energy measurements is presented in the paper. System is based on a DSP board, a data acquisition (DAQ) board and a computer with a real time mathematical model. The aim of the paper is to provide observing of measurement accuracy in the laboratory and to simulate different conditions with the “phantom load” technique: nonlinearity,...
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