SMathematical model for analysis of operating modes of asynchronous motor symmetric and asymmetric supply voltage

2019 ◽  
pp. 21-26
Author(s):  
E. NIEMTSEV ◽  
Keyword(s):  
Supply Voltage ◽  
Asynchronous Motor ◽  
Operating Modes

scholarly journals Operational reliability of low-voltage asynchronous motors at asymmetrical supply voltage

2019 ◽  
Vol 139 ◽  
pp. 01053
Author(s):  
Victoria Romanova ◽  
Sergey Khromov
Keyword(s):  
Low Voltage ◽  
Supply Voltage ◽  
Asynchronous Motor ◽  
Operational Reliability ◽  
Motor Shaft ◽  
Operating Modes ◽  
Squirrel Cage ◽  
Asynchronous Motors ◽  
Technical Solutions ◽  
Supply Systems

Issues of operating modes of 4A series asynchronous squirrel-cage motors and AI serried motors at asymmetrical supply voltage for different values of motor shaft load are considered on the basis of simulation using Matlab software package and Simulink package. In the simulation, currents in asynchronous motor phases were evaluated as a function of K2U, KZ, and based on these results, permissible operation parameters were evaluated for induction motors. The results obtained are the basis for technical solutions aimed at improving operational reliability of asynchronous motors, they will allow taking into account permissible operating parameters of asynchronous motors not only in the design, but also in operation in power supply systems of various facilities.

scholarly journals Formation of energy efficient start-brake modes of the frequency-controlled electric drive in production mechanism

2019 ◽  
Vol 104 ◽  
pp. 01006
Author(s):  
Maxim Filimonov ◽  
Nicolay Karnaukhov ◽  
Eugeny Lukyanov ◽  
Dmitry Smyatsky ◽  
Roman Mironenko
Keyword(s):  
Energy Efficient ◽  
Supply Voltage ◽  
Asynchronous Motor ◽  
Electrical Power ◽  
Production Mechanism ◽  
Mass Model ◽  
Electrical Drive ◽  
Asynchronous Motors ◽  
Production Mechanisms ◽  
Nominal Mode

this article the energy efficient frequency way of starting of production mechanisms electrical drive with low power asynchronous motors (from 90 Wt to 5 kWt) is proposed. To provide this With the goal of electrical losses decreasing during asynchronous motor starting the Pontryagin Maximum Principle have been applied by the authors when analysing of two-mass model of production mechanism frequency controlled electrical drive. In result of calculations for frequency controlled electrical drive of production mechanism with 90 Wt power asynchronous motor of the model 4AA50A2 Dependencies of amplitude and frequency of supply voltage by the time are obtained. These dependencies confirm possibility of decreasing the electrical power losses with different values of motor shaft load torques. In compare with the other ways of asynchronous motor starting (for example U/f=const) they allow to decrease the electrical losses more then two times in nominal mode.

scholarly journals Modernization of a frequency-controlled asynchronous electric drive system

2019 ◽  
pp. 25-33
Author(s):  
I. V. Shestakov ◽  
N. R. Safin
Keyword(s):  
Energy Efficiency ◽  
Electric Drive ◽  
Asynchronous Motor ◽  
Operating Mode ◽  
Voltage Source ◽  
Sinusoidal Voltage ◽  
Pulse Width Modulated ◽  
Operating Modes ◽  
Asynchronous Electric Drive ◽  
Research Show

The paper introduces the results of mathematical simulation of the operating modes of an asynchronous motor when powered by a sinusoidal voltage source and a width-modulated voltage pulse source. The study shows the possibilities of increasing the energy efficiency of an asynchronous electric drive. Findings of research show the feasibility of studying the switching of the motor power source from a pulse width-modulated voltage to a sinusoidal voltage source in the nominal operating mode in order to increase the energy efficiency of the electric drive

A LOW POWER CRYOGENIC CMOS ROIC DESIGN FOR 512 × 512 IRFPA

2013 ◽  
Vol 22 (10) ◽  
pp. 1340033 ◽  
Author(s):  
HONGLIANG ZHAO ◽  
YIQIANG ZHAO ◽  
YIWEI SONG ◽  
JUN LIAO ◽  
JUNFENG GENG
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Integrated Circuit ◽  
High Performance ◽  
Supply Voltage ◽  
Cmos Technology ◽  
High Gain ◽  
Readout Integrated Circuit ◽  
Chip Area ◽  
Operating Modes

A low power readout integrated circuit (ROIC) for 512 × 512 cooled infrared focal plane array (IRFPA) is presented. A capacitive trans-impedance amplifier (CTIA) with high gain cascode amplifier and inherent correlated double sampling (CDS) configuration is employed to achieve a high performance readout interface for the IRFPA with a pixel size of 30 × 30 μm2. By optimizing column readout timing and using two operating modes in column amplifiers, the power consumption is significantly reduced. The readout chip is implemented in a standard 0.35 μm 2P4M CMOS technology. The measurement results show the proposed ROIC achieves a readout rate of 10 MHz with 70 mW power consumption under 3.3 V supply voltage from 77 K to 150 K operating temperature. And it occupies a chip area of 18.4 × 17.5 mm2.

scholarly journals Modeling of thermal process in the energy system “Electrical network - asynchronous motor”

2021 ◽  
Vol 280 ◽  
pp. 05003
Author(s):  
Vitaliy Kuznetsov ◽  
Mykola Tryputen ◽  
Valerii Tytiuk ◽  
Zhanna Rozhnenko ◽  
Serhii Levchenko ◽  
...  
Keyword(s):  
Supply Voltage ◽  
Asynchronous Motor ◽  
Energy System ◽  
Electrical Network ◽  
Transfer Coefficients ◽  
Heat Transfer Coefficients ◽  
Real Process ◽  
Asynchronous Motors ◽  
Electromechanical Converter ◽  
Energy Economic Model

The paper discusses the influence of low-quality electricity on the temperature modes of operation of an asynchronous motor. In the course of experimental and analytical studies, the heat transfer coefficients and heat capacity of a particular electromechanical converter were determined. Experimental and analytical dependences of temperature changes of an asynchronous motor on time are given when it is connected to a supply voltage with different coefficients of sinusoidal distortion and negative sequence. The resulting model is tested for its adequacy to the real process and can be used as an element in the energy-economic model of an asynchronous motor to assess its uptime. This model that can be useful for simulation of thermal processes in asynchronous motors and optimising these devices for increasing the reliability.

scholarly journals THERMAL MODEL OF THE "INDUCTION GENERATOR–INDUCTION MOTOR" SYSTEM WITH NON–SYMMETRY IN THE STATOR WINDINGS

2021 ◽  
Vol 2 (53) ◽  
pp. 47-55
Author(s):  
V. Chenchevoi ◽  
◽  
Iu. Zachepa ◽  
O. Chornyi ◽  
R. Yatsiuk ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Thermal State ◽  
Asynchronous Motor ◽  
Operating Conditions ◽  
Factors Affecting ◽  
Thermal Transients ◽  
Operating Modes ◽  
Stator Windings ◽  
Asynchronous Generator

Purpose. Development of the IG model for estimation of influence of variations of parameters of the generator on quality of process of self–excitation at definition of the basic and boundary operating modes and system of initial excitation at invariable parameters of the generator. Result. The article presents studies of the system "asynchronous generator-asynchronous motor" with parametric asymmetry to determine the quality of generated electricity in load modes of operation on a mathematical model. The assessment of the thermal state in steady-state conditions was carried out using an equivalent thermal equivalent circuit. Thermal transients were investigated when starting an asynchronous electric motor from an autonomous power source based on an asynchronous generator. On a thermal mathematical model, a study of the influence of the asymmetry of the output voltage and its deviation from the nominal value on the heating of the connected asynchronous motor was carried out. A regression model has been developed for studying the operating conditions of electricity consumers when powered by an asynchronous generator with an asymmetry of the stator windings. Practical value. The use of the obtained equations will make it possible to determine the most rational combination of factors affecting the heating of the stator windings of asynchronous machines, at which they will not overheat in excess of the maximum permissible temperature values of the corresponding insulation classes. Figures 9, tables 2, references 23.

scholarly journals A 920-MHz Dual-Mode Receiver with Energy Harvesting for UHF RFID Tag and IoT

Electronics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 1042
Author(s):  
Peiqing Han ◽  
Zhaofeng Zhang ◽  
Yajun Xia ◽  
Niansong Mei
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Radio Frequency Identification ◽  
Supply Voltage ◽  
High Sensitivity ◽  
Cmos Process ◽  
Uhf Rfid ◽  
Dual Mode ◽  
Operating Modes ◽  
On Chip

A low-power dual-mode receiver is presented for ultra-high-frequency (UHF) radio frequency identification (RFID) systems. The reconfigurable architecture of the tag is proposed to be compatible with low-power and high-sensitivity operating modes. The read range of RFID system and the lifetime of the tag are increased by photovoltaic, thermoelectric and RF energy-harvesting topology. The receiver is implemented in a 0.18-μm standard CMOS process and occupies an active area of 0.65 mm × 0.7 mm. For low-power mode, the tag is powered by the rectifier and the sensitivity is −18 dBm. For high-sensitivity mode, the maximum PCE of the fully on-chip energy harvester is 46.5% with over 1-μW output power and the sensitivity is −40 dBm with 880 nW power consumption under the supply voltage of 0.8 V.

scholarly journals Determination of basic parameters and their boundary conditions of modern passive infrared motion detectors

2020 ◽  
Vol 1 (1) ◽  
pp. 31-42
Author(s):  
R. Holovatskyy ◽  
M. Lobur
Keyword(s):  
Boundary Conditions ◽  
Supply Voltage ◽  
Primary Sources ◽  
Operating Modes ◽  
Basic Parameters ◽  
Motion Detectors ◽  
Pattern Of Motion ◽  
Passive Infrared ◽  
Schematic Diagrams

The principle of work of modern passive infrared motion detectors of the known world manufacturers is considered; their peculiarities and fields of use are indicated. Both the typical structural and schematic diagrams are given. The basic parameters of modern passive infrared motion detectors and their boundary conditions have been determined based on the principle of operation of the detector and the synthetic processing of information from primary sources. The boundary conditions for the number of rays of the near middle and far zones of the pattern of motion detectors are given. Limit conditions for supply voltage, operating temperatures, and consumption currents in different operating modes are also given.

scholarly journals A Review on Energy Efficient CMOS Digital Logic

2013 ◽  
Vol 3 (6) ◽  
pp. 552-561 ◽  
Author(s):  
B. L. Dokic
Keyword(s):  
Energy Efficiency ◽  
Power Consumption ◽  
Power Supply ◽  
Digital Circuits ◽  
Supply Voltage ◽  
Digital Logic ◽  
Power Supply Voltage ◽  
Operating Modes ◽  
Optimum Choice ◽  
Adiabatic Logic

Autonomy of power supply used in portable devices directly depends on energy efficiency of digital logic. This means that digital systems, beside high processing power and very complex functionality, must also have very low power consumption. Power consumption depends on many factors: system architecture, technology, basic cells topology-speed, and accuracy of assigned tasks. In this paper, a review and comparison of CMOS topologies techniques and operating modes is given, as CMOS technology is expected to be the optimum choice in the near future. It is shown that there is a full analogy in the behavior of digital circuits in sub-threshold and strong inversion. Therefore, synthesis of digital circuits is the same for both strong and weak operating modes. Analysis of the influence of the technology, MOS transistor threshold voltage (Vt) and power supply voltage (Vdd) on digital circuit power consumption and speed for both operating modes is given. It is shown that optimal power consumption (minimum power consumption for given speed) depends on optimal choice of threshold, and power supply voltage. Multi Vdd /Vt techniques are analyzed as well. A review and analysis of alternative logical circuit's topologies – pass logic (PL), complementary pass logic (CPL), push-pull pass logic (PPL) and adiabatic logic – is also given. As shown, adiabatic logic is the optimum choice regarding energy efficiency.

scholarly journals AMPLITUDE CHARACTERISTICS OF SILICON PHOTO-ELECTRON MULTIPLIER’S PHOTORESPORENSE

2019 ◽  
Author(s):  
Maryna Asayonak ◽  
Andrey Zenevich ◽  
Yauhen Novikau
Keyword(s):  
Optical Radiation ◽  
Supply Voltage ◽  
Block Diagram ◽  
Wave Length ◽  
Photon Counting ◽  
Current Mode ◽  
Average Amplitude ◽  
Avalanche Photodetectors ◽  
Operating Modes ◽  
Wide Range

Currently, in many applications, photodetectors are needed that provide registration of optical radiation in a wide range of intensities and allow combining two operating modes: current mode and photon counting. These devices include silicon photoelectronic multipliers (SiPM), which have a number of advantages compared to electrovacuum photomultipliers and avalanche photodetectors. However, the influence on the photoresponse characteristics of SiPM of such important factors as the supply voltage and temperature has not been studied enough. The influence of these factors on the amplitude parameters of the photoresponse of SiPM is studied. The block diagram of the experimental setup is presented, with the help of which the photoresponse characteristics of SiPM with n+-n-p+ and p+-p-n+ structures manufactured by Integral OJSC (Republic of Belarus) were measured. The dependences of the average amplitude of the photoresponse on the supply voltage and temperature of silicon photomultipliers for various wave-lengths of optical radiation are presented. It was found that when SiPM were exposed to optical pulses with the same duration and energy exposure at the same temperature at the same overvoltage, the photoresponse amplitude was larger for a SiPMr with p+-p-n+ structure regardless of the wave-length of optical radiation. It was found that, when the overvoltage changes, the increase in the photoresponse amplitude is observed only in the overvoltage range ΔU = 0 ¸ 3 V for all the studied SiPM, irrespective of the wave-length of the detected optical radiation and temperature. It was determined that a decrease in temperature led to an increase in the amplitude of the photoresponse pulses. The temperature dependence of the amplitude of the photoresponse was most pronounced for SiPM with the p+-p-n+ structure. It was shown that the dependences of the average amplitude of the photomonitor Si-PM on the energy exposure have a linear section, the length of which depends on the wavelength of the detected optical radiation.

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