scholarly journals Investigation of the Operation Speed of AC Voltage Sensor

2009 ◽  
Vol 25 (25) ◽  
pp. 151-154 ◽  
Author(s):  
Vladimirs Cimanis ◽  
Vladimirs Hramcovs ◽  
Ivars Rankis
Keyword(s):  
High Frequency ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Voltage Sensor ◽  
Voltage Stabilizer ◽  
Operation Speed ◽  
Electronic Pulse ◽  
Ac Voltage Stabilizer ◽  
Industrial Frequency

Investigation of the Operation Speed of AC Voltage SensorIn the article the AC voltage sensor of industrial frequency-the signal former of the analogue controller with pulse-width modulation which, in its turn, controls the high-frequency electronic pulse AC voltage stabilizer, is considered.

A Hydraulic Rotary Switched-Inertance Servo-Transformer

1988 ◽  
Vol 110 (2) ◽  
pp. 144-150 ◽  
Author(s):  
F. T. Brown ◽  
S. C. Tentarelli ◽  
S. Ramachandran
Keyword(s):  
Steady State ◽  
High Frequency ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Complete Solution ◽  
Partial Solution ◽  
State Theory ◽  
Novel Approach ◽  
Flow Through ◽  
Theory And Experiments

Switched-reactance hydraulics represents a radically novel approach to the control of fluid power, since the proportional metering of flow through adjustable orifices is eliminated, and the inertive properties of the fluid substituted. Potential advantages in bandwidth, linearity, and efficiency have been indicated. This paper presents the first steady-state theory and experiments with a rotary fluid switch, which accomplishes the needed pulse-width modulation at a desirably high frequency. Cavitation problems are observed, means of their partial solution are implemented, and means of a more complete solution are indicated.

scholarly journals Analysis of Sinusoidal Pulse Width Modulation Parameter Settings in High Precission Closed Loop Full Bridge Bipolar Inverters for High Voltage High Frequency Generator

Teknik ◽  
2020 ◽  
Vol 41 (1) ◽  
pp. 55-61
Author(s):  
Abdul Syakur ◽  
Arifin Wibisono
Keyword(s):  
High Voltage ◽  
High Frequency ◽  
Pulse Width ◽  
Large Scale ◽  
Closed Loop ◽  
Pulse Width Modulation ◽  
Waste Treatment ◽  
Electrical Energy ◽  
Loop Control ◽  
Sinusoidal Pulse Width Modulation

The application of high voltage becomes more important and wider. High voltage is needed in the process of reducing air contaminants, waste treatment, sanitation, disinfecting microorganisms, testing for insulating high voltage equipment, and transmitting electrical energy. The problem of high voltage AC generation system is still in a large scale, static, not portable, and very expensive. This paper presents an analytical design of a high-voltage AC high-frequency based on power electronic. It is portable, less expensive, and eaasier to control the amplitudo and frequency. The application of the Full Bridge Bipolar Inverter topology with the Sinusoidal Pulse Width Modulation switching method provides variable sinusoidal AC voltage outputs (Vo) on its amplitude and frequency. The Tesla Coil Transformer amplifies the amplitude in accordance with the classification of the high voltage AC in the order of Kilo Volt. The Closed Loop control system in the Bipolar Inverter Full Bridge topology provides high accuracy results between the given setting values and the actual amplitude output and the expected high-frequency AC voltage. Analysis of the SPWM switching pattern parameter settings shows stability for several loading variations

scholarly journals THE STABILIZATION ACCURACY OF THE PHASE POSITION OF THE WORKING BODY OF THE ROBOTICS COMPLEX

2020 ◽  
pp. 20-28
Author(s):  
А. Denisov ◽  
Y. Denisov ◽  
O. Bursala
Keyword(s):  
Control System ◽  
Electric Drive ◽  
Pid Controller ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Optimal Operation ◽  
Voltage Inverter ◽  
Operation Speed ◽  
The Moment ◽  
Autonomous Voltage Inverter

To stabilize the phase position of the working body of the robotics complex a single-circuit precision electric drive system was developed based on the principle of phase-locked loop. The direct-driven electric drive is made on the basis of brushless direct current motor, which is switched to synchronous mode with minimal discrepancy between the phases of the reference signals and the pulse speed sensor. The phase error signal is fed to the input of the PID controller, which controls the pulse width modulation of the impulses controlling the operation of the power transistors of the autonomous voltage inverter. In a static mode, the control system of the autonomous voltage inverter implements a sinusoidal law of the pulse width modulation of the output pulses. The PID controller and the control system of the autonomous voltage inverter are programmatically implemented on the basis of the controller. In the process of analysing of the stabilization accuracy, the synchronous motor is represented by a second-order linear link, which establishes a relation between the phase deviations of the motor rotor and the stator magnetic field. The autonomous voltage inverter is represented by a zero-order hold whose coefficient of amplification on amplitude is found by the results of the approximation of its output voltage using the Walsh-Fourier series. The analysis of the phase stabilization process is performed on the basis of the state variables method taking into account the perturbations at the moment of load using the program which implements the recurrent procedure. The settings of the PID controller are determined by the variation results when the moment of load changes. Their initial values ​​are determined as a result of optimizing the system in terms of operation speed considering the condition of finite duration processes. It is assumed that there is no moment of load perturbation. The procedure for setting the PID controller parameters to the optimal operation speed mode can also be performed on the basis of neural networks. As a result of the calculations, it was found that with an increase of the load moment by 5%, the maximum deviation of the rotor phase was 0.22 us and 0.03 us of minimum deviation respectively.

scholarly journals Common-Mode Reduction SVPWM for Three-Phase Motor Fed by Two-Level Voltage Source Inverter

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3884
Author(s):  
Jian Zheng ◽  
Mingcheng Lyu ◽  
Shengqing Li ◽  
Qiwu Luo ◽  
Keyuan Huang
Keyword(s):  
High Frequency ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Voltage Source ◽  
Switching Frequency ◽  
Voltage Source Inverter ◽  
Large Magnitude ◽  
Common Mode ◽  
Common Mode Voltage ◽  
Three Phase

Aiming at the problem of large magnitude and high frequency of common-mode voltage (CMV) when space vector pulse width modulation (SVPWM) is used in a three-phase motor fed by a two-level voltage source inverter, a common-mode reduction SVPWM (CMRSVPWM) is studied. In this method, six new sectors are obtained by rotating six sectors of conventional SVPWM by 30°. In odd-numbered sectors, only three non-zero vectors with odd subscripts are used for synthesis, while in even-numbered sectors, only three non-zero vectors with even subscripts are used for synthesis. The actuation durations of three non-zero vectors in each switching period in each sector are given. Simulation and experimental results show that, compared with the conventional SVPWM, the CMV magnitude of CMRSVPWM is reduced by 66.67% and the CMV frequency of CMRSVPWM is reduced from the original switching frequency to the triple fundamental frequency. At the same time, the current, torque and speed of the motor are still good.

The Design of 25KV High-Frequency High-Voltage Power Supply

2014 ◽  
Vol 912-914 ◽  
pp. 927-930
Author(s):  
Qiang Jiang
Keyword(s):  
Power Supply ◽  
High Frequency ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Single Chip ◽  
Single Chip Microcomputer ◽  
High Voltage Power Supply ◽  
Switch Power Supply ◽  
Switch Power ◽  
Inverter Topology

In this paper, a HV and HF switch power supply was designed, which was controlled through a single chip microcomputer, also the MOSFET was used as the switch power tube. The PWM (pulse width modulation) technique and half-bridge inverter topology have been used to invert AC into the DC that can be adjust from 0V~25KV and the operating frequency is 35KHz, Through the simulation with the Saber software and practical use, the feasibility of the scheme and the correctness of the design have been verified.

scholarly journals DESAIN DAN IMPLEMENTASI INVERTER 3 FASA DENGAN PENAMBAHAN PUSH-PULL CONVERTER

2020 ◽  
Vol 11 (1) ◽  
pp. 157-164
Author(s):  
Fifi Hesty Sholihah ◽  
Nur Rohmat Hadianto ◽  
Mustaghfiri Mustaghfiri
Keyword(s):  
Renewable Energy ◽  
Duty Cycle ◽  
High Frequency ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
High Frequency Transformer ◽  
Sinusoidal Pulse Width Modulation ◽  
Feed In Tariff

Energi surya merupakan jenis renewable energy yang mempunyai potensi besar di indonesia. Energi surya dapat dikonversi menjadi energi listrik menggunakan PV. Berhubung dengan meningkatnya kebutuhan energi di Indonesia serta diberlakukan feed in tariff oleh pemerintah, maka akan mempermudah untuk jual beli listrik melalui sistem on-grid. Pada penelitian ini membahas desain dan implementasi inverter 3 fasa yang terkoneksi grid. Rangkaian inverter 3 fasa ini menggunakan sinyal sinusoidal pulse width modulation (SPWM) yang dibangkitkan oleh Arduino. Kemudian sinyal SPWM digunakan untuk masukan rangkaian driver IR2113. Pada perancangan ini menambahkan push-pull converter sebagai suplai inverter 3 fasa. Push-pull converter menggunakan sinyal PWM dari IC SG3525. Duty cycle yang dihasilkan dapat diatur sesuai dengan tegangan yang ingin dihasilkan. Rangkaian ini menggunakan high frequency transformer sebagai step up tegangan. Pada variasi tegangan input 36 volt sampai 66 volt menghasilkan tegangan yang stabil pada 440 volt. Pada pengujian sistem menggunakan tegangan grid 175 volt. Sehingga menghasilkan tegangan line-line 311 Vrms dan tegangan line-neutral 179,5 Vrms.

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