Simulation Charging of the Forming Line by the Operator Method

2021 ◽  
Author(s):  
Volodymyr Chumakov
Keyword(s):  
Characteristic Impedance ◽  
Operator Method ◽  
Internal Resistance ◽  
Voltage Source ◽  
Particle Accelerators ◽  
Charge Voltage ◽  
Distributed Parameters ◽  
Microwave Radio ◽  
Charging Mode ◽  
The Relationship

The application of repeated Laplace transform to the analysis of a line with distributed parameters is considered. As an example, pulse forming lines are analyzed, which are widely used in microwave radio devices and high-current charged particle accelerators. The results of the calculation of the charge voltage of the forming line from the voltage source are given. The dependence of the line charging mode on the relationship between the internal resistance of the source and the characteristic impedance of the line is shown.

Effect of voltage source internal resistance on the SQUID bootstrap circuit

2011 ◽  
Vol 25 (1) ◽  
pp. 015012 ◽  
Author(s):  
Hui Dong ◽  
Guofeng Zhang ◽  
Yongliang Wang ◽  
Yi Zhang ◽  
Xiaoming Xie ◽  
...  
Keyword(s):  
Internal Resistance ◽  
Voltage Source

scholarly journals Voltmeter Design Based on ADS1115 and Arduino Uno for DC Resistivity Measurement

2020 ◽  
Vol 5 (1) ◽  
pp. 73
Author(s):  
Risky Martin Antosia
Keyword(s):  
Resistivity Measurement ◽  
Voltage Divider ◽  
Internal Resistance ◽  
Negative Potential ◽  
Potential Difference ◽  
Voltage Source ◽  
Physical Parameters ◽  
Dc Resistivity ◽  
Arduino Uno ◽  
Two Parameters

One part of the geoelectric method is DC (Direct Current) resistivity measurement. Physical parameters measured by the system are the current and potential difference. From these two parameters, the resistance value is obtained based on Ohm’s law. Based on the current-potential electrodes configuration in the DC resistivity measurement, there is the possibility of contact between the potential-current electrodes and also the position of the potential electrodes that can be exchanged. Thus, an auto-range Voltmeter is needed which can measure the potential difference with the order of mV up to hundreds of volts and can measure negative potential difference value (reversed polarity). This research aims to build a Voltmeter prototype using ADS1115 (namely ADC with 16-bit resolution) and Arduino Uno, which can be applied in DC resistivity measurement. In this system, there is internal resistance and switch. The internal resistance is around 2.4 MΩ, arranged into a voltage divider circuit to be able to measure the maximum potential input around 1,600 V. The switch function is to set the measurement mode (as auto-range), which is set by Arduino Uno. Furthermore, ADS1115 uses a differential measurement method to be able to measure a negative potential difference. Based on the results of tests on several resistor components with an adjustable voltage source, the Voltmeter is good at measuring the potential difference in resistor values below 10 KΩ with a confidence level of around 97%.

scholarly journals Development of a brushless HTS exciter for a 10 kW HTS synchronous generator

2021 ◽  
Author(s):  
Christopher Bumby ◽  
Rodney Badcock ◽  
HJ Sung ◽  
KM Kim ◽  
Zhenan Jiang ◽  
...  
Keyword(s):  
Thermal Load ◽  
Synchronous Generator ◽  
Internal Resistance ◽  
Voltage Source ◽  
Synchronous Generators ◽  
Thermal Bridge ◽  
Current Leads ◽  
Experimental Laboratory ◽  
Laboratory Device ◽  
Dc Current

HTS synchronous generators, in which the rotor coils are wound from high-Tc superconducting wire, are exciting attention due to their potential to deliver very high torque and power densities. However, injection of the large DC currents required by the HTS rotor coils presents a technical challenge. In this paper we discuss the development of a brushless HTS exciter which operates across the cryostat wall to inject a superconducting DC current into the rotor coil circuit. This approach fundamentally alters the thermal load upon the cryogenic system by removing the need for thermally inefficient normal-conducting current leads. We report results from an experimental laboratory device and show that it operates as a constant voltage source with an effective internal resistance. We then discuss the design of a prototype HTS-PM exciter based on our experimental device, and describe its integration with a demonstration HTS generator. This 200 RPM, 10 kW synchronous generator comprises eight double pancake HTS rotor coils which are operated at 30 K, and are energised to 1.5 T field through the injection of 85 A per pole. We show how this excitation can be achieved using an HTS-PM exciter consisting of 12 stator poles of 12 mm YBCO coated-conductor wire and an external permanent magnet rotor. We demonstrate that such an exciter can excite the rotor windings of this generator without forming a thermal-bridge across the cryostat wall. Finally, we provide estimates of the thermal load imposed by our prototype HTS-PM exciter on the rotor cryostat. We show that duty cycle operation of the device ensures that this heat load can be minimised, and that it is substantially lower than that of equivalently-rated conventional current leads.

scholarly journals An angle speed and thrust relationship of the rotor system in the quadcopter aircraft

2019 ◽  
Vol 13 (2) ◽  
pp. 469
Author(s):  
Al Al ◽  
Arfita Yuana Dewi ◽  
Antonov Bachtiar ◽  
Dwi Harinita
Keyword(s):  
Control Systems ◽  
Rotation Speed ◽  
Weather Conditions ◽  
Voltage Source ◽  
Rotor Speed ◽  
High Type ◽  
Rotor Angle ◽  
And Control ◽  
Relationship Of ◽  
The Relationship

Utilizing Quadcopter were still many obstacles such as; plane easy to fall; the battery is not durable; vulnerable to weather conditions and others. The research and development has grown to improve aircraft facilities and capabilities. Many parameters related to aircraft lift capability factors; fly long; flying high; type of motor; the type of propeller: including the sensors and control systems used. This study was to find the relationship between changes in the BLDC motor voltage source to the rotor angle velocity <em>(ω)</em>; rotor speed to rotor lift <em>(Ft)</em>;  wind speed to rotor lift; push the following rotor <em>(Ct)</em>. Empirical testing was conducted in the laboratory to find the relationship of these parameters. The results data show that; the lift power generated with rotational speed was not proportional, non linearity occurs when the rotor was released from the self and starts pulling the strain gauge when the rotation speed reaches around 65 <em>rps</em>. Once the rotation speed of the rotor is able to reach up to 1.5 Newton lift then the thrust rising trend sharply<strong> </strong>increasing <strong>to</strong>increasing <strong>of </strong>the rotor speed. A motor hade 1200 <em>KV</em> and blade with a radius of 0.12 <em>m</em>, then obtained thrust <em>(Ct)</em> of 1.732.

scholarly journals Stability in a parallel resonant circuit with active load

2020 ◽  
Vol 216 ◽  
pp. 01160
Author(s):  
E.G Usmanov
Keyword(s):  
Input Voltage ◽  
Internal Resistance ◽  
Voltage Source ◽  
Resonant Circuit ◽  
Active Load ◽  
The Stability

This article examines the stability of excited oscillations in resonant circuits in order to determine the possibility of their application to control thyristors in the function of changing the input voltage value. In resonant circuits connected to a voltage source with a low internal resistance, the occurrence of stable oscillations depends significantly on the value of the parameters of the circuit under consideration.

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