Pemodelan dan simulasi boost converter menggunakan Python

Pada Paper ini dirancang model boost converter untuk charging kapasitor pada robot sepak bola beroda. Kapasitor pada kondisi ini digunakan untuk menyimpan energi pada sistem penendang robot. Karena sistem penendang membutuhkan energi yang tinggi, tegangan yang digunakan untukmengisi kapasitor harus tegangan tinggi. Oleh karena itu, pada paper ini akan dibahas pemodelan boost converter dengan tegangan output 350V.Pemodelan akan menggunakan metode averaging untuk membuat 2 persamaan dari 2 kondisi boost converter menjadi 1 persamaan state-space yang mewakili seluruh kondisi dari boost converter tersebut.Dengan memasukkan parameter-parameter yang telah dihitung ke dalam persamaan state-space tersebut akan diuji respon dari sistem boost converter dengan menggunakan simulasi python. Pada kondisi awal boost converter akan disimulasikan menggunakan critical value dari setiap komponen dari hasil perhitungan. Selanjutnya, beban kapasitor akan dirubah menjadi 4700µF sesuai dengan kapasitor yang digunakan pada robot. Dari simulasi tersebut didapatkan bahwa boost converter dengan tegangan output 350V dan menggnakan beban kapasitor 4700uF mampu menuju keadaan stabil pada waktu 0.6 s. In this paper, a boost converter model is designed for charging capacitors on wheeled soccer robots. Capacitors in this condition are used to store energy in the robotic kicking system. Because the system requires high energy, the voltage used to charge the capacitor must be high. Therefore, this paper will discuss the boost converter modeling with 350V output voltage. The modeling will use the averaging method to create 2 equations from 2 boost converter conditions to 1 state-space equation that represents all conditions of the boost converter. By entering the calculated parameters into the state-space equation, the response of the boost converter system will be tested using python simulation. In the initial conditions, the boost converter will be simulated using the critical value of each component from the calculation results. Furthermore, the capacitor charge will be changed to 4700µF according to the capacitor used in the robot. From the simulation, it was found that the boost converter with an output voltage of 350V and using a 4700uF capacitor load was able to go to a stable state in 6s.

MONITORING THE CAPACITOR CHARGE VOLTAGE IN THE PULSE VOLTAGE GENERATOR USING THE ACCELERATOR OF RELATIVISTIC ELECTRON BEAMS

Noise-protected high charge voltage meter was manufactured using terminal capacitors of the four-channel pulse voltage generator (PVG). The noise protection is provided by the use of communication lines with fiberoptic cables. This measuring device is successfully used for the relativistic electron beam (REB) accelerator “Temp-B” and it provides the measurement accuracy of ~ 0.5% in the electromagnetic noise environment.

Reducing Measurement Time in Direct Interface Circuits for Resistive Sensor Readout

Direct Interface Circuits (DICs) carry out resistive sensor readings using a resistance-to-time-to-digital conversion without the need for analog-to-digital converters. The main advantage of this approach is the simplicity involved in designing a DIC, which only requires some additional resistors and a capacitor in order to perform the conversion. The main drawback is the time needed for this conversion, which is given by the sum of up to three capacitor charge times and their associated discharge times. This article presents a modification of the most widely used estimation method in a resistive DIC, which is known as the Two-Point Calibration Method (TPCM), in which a single additional programmable digital device pin in the DIC and one extra measurement in each discharge cycle, made without slowing down the cycle, allow charge times to be reduced more than 20-fold to values around 2 µs. The new method designed to achieve this reduction only penalizes relative errors with a small increase of between 0.2% and 0.3% for most values in the tested resistance range.

High power current pulse generator based on reversible thyristor converter

In metal forming using high power current pulses, it becomes necessary to control both reproduction frequency and pulse amplitude. Description of a generator of high power current pulses with controlled thyristor converter is provided as a power source of charging device (charger) for regulating voltage (pulse amplitude) of capacitor charge. Faults of the generators associated with inrush current in capacitor charge modes are revealed, which reduces quality of supply network. To reduce time of transient processes while lowering voltage across capacitors, application of reverse thyristor converter is applied as a power source. Structural diagram of generator is considered, which includes reversible thyristor converter with separate control, power unit, capacitor recharge device, charger parameters automatic control system and capacitor charge process control system. Calculation of parameters of automatic control system regulators is presented. To obtain optimal transients, standard methodology for setting regulators to a modular optimum was used. In order to reduce overshoot at time of disturbances appearance, which can reach 100 % and higher, socalled logical device was introduced into the automatic control system. It blocks control pulses on thyristors of converter and simultaneously reduces signal at the output of current regulator to zero. Simulation model of high power current pulse generator in MatLab – Simulink environment was synthesized. Analysis of the model was carried out, and graphs are given that explain principle of device operation and transition processes under various operating modes. Generator application will allow user to adjust amplitude of current pulses with high speed and to obtain sufficiently high-quality transient processes of capacitors charge (discharge), which will have beneficial effect on supply network. Application of better converters will significantly increase frequency of reproduction of current pulses.