scholarly journals Analysis of the Usefulness Range of the Averaged Electrothermal Model of a Diode–Transistor Switch to Compute the Characteristics of the Boost Converter

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 154
Author(s):  
Paweł Górecki ◽  
Krzysztof Górecki
Keyword(s):  
Integrated Circuit ◽  
Input Voltage ◽  
Boost Converter ◽  
Junction Temperature ◽  
Switching Frequency ◽  
Transistor Switch ◽  
Insulated Gate Bipolar Transistor ◽  
Power Electronics Converters ◽  
Rapid Switching ◽  
Averaged Model

In the design of modern power electronics converters, especially DC-DC converters, circuit-level computer simulations play an important role. This article analyses the accuracy of computations of the boost converter characteristics in the steady state using an electrothermal averaged model of a diode–transistor switch containing an Insulated Gate Bipolar Transistor (IGBT) and a rapid switching diode. This model has a form of a subcircuit for SPICE (Simulation Program with Integrated Circuit Emphasis). The influence of such factors as the switching frequency of the transistor, the duty cycle of the signal controlling the transistor, the input voltage, and the output current of the boost converter on the accuracy of computing the converter output voltage and junction temperature of the IGBT and the diode were analysed. The correctness of the computation results was verified experimentally. Based on the performed computations and measurements, the usefulness range of the model under consideration was determined, and a method of solving selected problems limiting the accuracy of computations of the characteristics of this converter was proposed.

scholarly journals Electrothermal Averaged Model of a Diode-Transistor Switch Including IGBT and a Rapid Switching Diode

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3033 ◽  
Author(s):  
Paweł Górecki ◽  
Krzysztof Górecki
Keyword(s):  
Steady State ◽  
Integrated Circuit ◽  
Good Accuracy ◽  
Bipolar Transistor ◽  
Transistor Switch ◽  
Insulated Gate Bipolar Transistor ◽  
Self Heating ◽  
Proposed Model ◽  
Rapid Switching ◽  
Averaged Model

This study proposes an electrothermal averaged model of the diode–transistor switch including insulated gate bipolar transistor (IGBT) and a rapid switching diode. The presented model has the form of subcircuits dedicated for simulation program with integrated circuit emphasis (SPICE) and it makes it possible to compute characteristics of DC–DC converters at the steady state considering self-heating phenomena, both in the diode and in IGBT. This kind of model allows computations of voltages, currents and internal temperatures of all used semiconductor devices at the steady state. The formulas used in this model are adequate for both: continuous conducting mode (CCM) and discontinuous conducting mode (DCM). Correctness of the proposed model is verified experimentally for a boost converter including IGBT. Good accuracy in modeling these converter characteristics is obtained.

scholarly journals Modeling and simulation of DC to DC boost converter using single phase matrix converter topology

2020 ◽  
Vol 11 (2) ◽  
pp. 774
Author(s):  
Fajariah Kadir ◽  
S.Z. Mohammad Noor ◽  
Faranadia A.H. ◽  
K.S. Muhammad
Keyword(s):  
Single Phase ◽  
Pulse Width Modulation ◽  
Input Voltage ◽  
Boost Converter ◽  
Matrix Converter ◽  
Switching Frequency ◽  
Resistive Load ◽  
Insulated Gate Bipolar Transistor ◽  
Voltage Spike ◽  
Four Quadrant

The main objective of this work is to model and simulate DC to DC Boost Converter using Single Phase Matrix Converter (SPMC) topology using MATLAB/Simulink (MLS). The output voltage is controlled by using Pulse Width Modulation (PWM) technique. Four pairs of Insulated Gate Bipolar Transistor (IGBT) is used as the switching device where for each pair, it is located in parallel and opposite direction. Safe commutation technique is performed in preventing voltage spike at the output. Through the simulation, at switching frequency of 25kHz, the model is able to step up its input voltage about two times larger and all of the results achieved a good agreement with the principle of four quadrant operation. It is also realized that without the implementation of safe commutation technique, spikes were generated and the model is unable to boost its input voltage. All of the selected results from the analysis which includes variation of quadrant, switching frequency, duty cycle and resistive load are presented in this paper.

Comparison of Dc-Dc SEPIC, CUK and Flyback Converters Based LED Drivers

2020 ◽  
pp. 99-107
Author(s):  
Erdal Sehirli
Keyword(s):  
Integrated Circuit ◽  
Closed Loop ◽  
Input Voltage ◽  
Open Loop ◽  
Current Sensor ◽  
Switching Frequency ◽  
Led Driver ◽  
Advantages And Disadvantages ◽  
Led Drivers ◽  
Conduction Mode

This paper presents the comparison of LED driver topologies that include SEPIC, CUK and FLYBACK DC-DC converters. Both topologies are designed for 8W power and operated in discontinuous conduction mode (DCM) with 88 kHz switching frequency. Furthermore, inductors of SEPIC and CUK converters are wounded as coupled. Applications are realized by using SG3524 integrated circuit for open loop and PIC16F877 microcontroller for closed loop. Besides, ACS712 current sensor used to limit maximum LED current for closed loop applications. Finally, SEPIC, CUK and FLYBACK DC-DC LED drivers are compared with respect to LED current, LED voltage, input voltage and current. Also, advantages and disadvantages of all topologies are concluded.

Simulation and Experimentation of Fourth Order DC-DC Boost Converter for Renewable Energy Source Applications

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
S.B Mohanty ◽  
K.M Ravi Eswar ◽  
D. Elangovan ◽  
G. Arun Kumar
Keyword(s):  
Energy Source ◽  
Renewable Energy Source ◽  
Renewable Energy ◽  
Energy Storage ◽  
Fourth Order ◽  
Input Voltage ◽  
Boost Converter ◽  
Switching Frequency ◽  
Bacterial Foraging Optimization ◽  
Loop Control

In this paper, analysis and experimentation of a fourth order boost converter has been proposed for renewable energy source applications such as solar power. The output of proposed converter is fed to motor load of 220W. The main advantages of this converter are negligible current ripples at both source and load side and higher efficiency as compared to the conventional boost converter. The energy storage elements in circuit are designed and optimized using Bacterial Foraging Optimization Algorithm (BFOA) to solve the contradictory problems of steady state and dynamic performance of the system. The up-down glitch in control to output transfer function of system is reduced with the optimized values of energy storage elements in the proposed converter. Therefore dynamic response of system is analyzed with the designed values of inductor and capacitor. Closed loop control is introduced in the proposed system using proportional integral controller to maintain the output voltage constant when there is any load disturbance in the output side and wide variations in the input voltage. Simulation and hardware results of the proposed converter with input voltage of 60V and switching frequency of 100 kHz are presented.

scholarly journals Miniature DC-DC Boost Converter for Driving Display Panel of Notebook Computer

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2924
Author(s):  
Seok-Hyeong Ham ◽  
Hyung-Jin Choe
Keyword(s):  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Input Voltage ◽  
Boost Converter ◽  
Switching Frequency ◽  
Notebook Computer ◽  
Switching Losses ◽  
Voltage Stress ◽  
Switch Temperature

This paper proposes a miniature DC-DC boost converter to drive the display panel of a notebook computer. To reduce the size of the circuit, the converter was designed to operate at a switching frequency of 1 MHz. The power conversion efficiency improved using a passive snubber circuit that consisted of one inductor, two capacitors, and two diodes; it reduced the switching losses by lowering the voltage stress of the switch and increased the voltage gain using charge pumping operations. An experimental converter was fabricated at 2.5 cm × 1 cm size using small components, and tested at input voltage 5 V ≤ VIN ≤ 17.5 V and output current 30 mA ≤ IO ≤ 150 mA. Compared to existing boost converters, the proposed converter had ~7.8% higher power conversion efficiency over the entire range of VIN and IO, only ~50% as much voltage stress of the switch and diodes, and a much lower switch temperature TSW = 49.5 °C. These results indicate that the proposed converter is a strong candidate for driving the display panel of a notebook computer.

A Near-Threshold Voltage Startup Monolithic Boost Converter with Adaptive Sleeping Time Control

2016 ◽  
Vol 26 (04) ◽  
pp. 1750063 ◽  
Author(s):  
Lianxi Liu ◽  
Yiyang Zhou ◽  
Junchao Mu ◽  
Xufeng Liao ◽  
Zhangming Zhu ◽  
...  
Keyword(s):  
Threshold Voltage ◽  
Input Voltage ◽  
Boost Converter ◽  
Switching Frequency ◽  
Cmos Process ◽  
Sleeping Time ◽  
Time Control ◽  
Soft Start ◽  
Light Load ◽  
Near Threshold

A novel near-threshold voltage startup monolithic boost converter is presented in this paper using an adaptive sleeping time control (ASTC) scheme for low-power applications. The proposed ASTC scheme can promote the power efficiency of the current-mode boost converter under light load by automatically adjusting the sleep time of the converter, and the converter's quiescent current drops down to 4[Formula: see text][Formula: see text]A during the sleeping period. In addition, a new soft-start method is introduced to make the boost converter start up with a near-threshold input voltage. The proposed boost converter was fabricated in a standard 0.18[Formula: see text][Formula: see text]m CMOS process and occupies a small chip area of 0.50[Formula: see text][Formula: see text][Formula: see text]mm. Experimental results show that the boost converter achieves the minimum 0.5-V startup voltage when the output voltage is set to 1.8[Formula: see text]V. After startup, the input voltage range can be expanded from 0.3[Formula: see text]V to 1.5[Formula: see text]V with a switching frequency of 1[Formula: see text]MHz. In addition, a peak efficiency of 94% and a minimum efficiency of 81% are measured at the 1.5-V input voltage as the load current ranges from 0.1[Formula: see text]mA to 100[Formula: see text]mA.

scholarly journals Research on the Influence of Switching Frequency on Low-Frequency Oscillation in the Voltage-Controlled Buck-Boost Converter

2011 ◽  
Vol 2011 ◽  
pp. 1-15 ◽  
Author(s):  
Faqiang Wang ◽  
Xikui Ma
Keyword(s):  
Mathematical Model ◽  
Theoretical Analysis ◽  
Low Frequency ◽  
Boost Converter ◽  
Switching Frequency ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Matlab Simulink ◽  
Averaged Model ◽  
The Mathematical Model

The influence of switching frequency on the low-frequency oscillation in the voltage-controlled buck-boost converter is studied in this paper. Firstly, the mathematical model of this system is derived. And then, a glimpse at the influence of switching frequency on the low-frequency oscillation in this system by MATLAB/Simulink is given. The improved averaged model of the system is established, and the corresponding theoretical analysis is presented. It is found that the switching frequency has an important influence on the low-frequency oscillation in the system, that is, the low-frequency oscillation is easy to occur when the switching frequency is low. Finally, the effectiveness of the improved averaged model and the theoretical analysis are confirmed by circuit experiment.

Simulation and Analysis of Multiphase Boost Converter with Soft-Switching for Renewable Energy Application

2017 ◽  
Vol 8 (4) ◽  
pp. 1894
Author(s):  
A. A. Bakar ◽  
A. Ponniran ◽  
T. Taufik
Keyword(s):  
Input Voltage ◽  
Boost Converter ◽  
Circuit Model ◽  
Input Current ◽  
Switching Frequency ◽  
Switching Loss ◽  
Simulation Design ◽  
Voltage Range ◽  
Conduction Loss ◽  
Switching Devices

<span>This paper presents the simulation design of dc/dc interleaved boost converter with zero-voltage switching (ZVS). By employin the interleaved structure, the input current stresses to switching devices were reduced and this signified to a switching conduction loss reduction. All the parameters had been calculated theoretically. The proposed converter circuit was simulated by using MATLAB/Simulink and PSpice software programmes. The converter circuit model, with specifications of output power of 200 W, input voltage range from 10~60 V, and operates at 100 kHz switching frequency was simulated to validate the designed parameters. The results showed that the main switches of the model converter circuit achieved ZVS conditions during the interleaving operation. Consequently, the switching losses in the main switching devices were reduced. Thus, the proposed converter circuit model offers advantages of input current stress and switching loss reductions. Hence, based on the designed parameters and results, the converter model can be extended for hardware implementation.</span>

dual inductor-fed boost converter with an auxiliary transformer and voltage doubler

2013 ◽  
Vol 61 (4) ◽  
pp. 787-791
Author(s):  
J. Dawidziuk
Keyword(s):  
Input Voltage ◽  
Boost Converter ◽  
Switching Frequency ◽  
Time Duration ◽  
Two Phase ◽  
Load Range ◽  
Boost Converters ◽  
Conduction Loss ◽  
Voltage Doubler ◽  
Voltage Conversion

Abstract This paper presents a dual inductor-fed boost converter with an auxiliary transformer and voltage doubler for sustainable energy power converters. The new topology integrates a two-phase boost converter and a dual inductor-fed boost converter. The energy stored and transferred by both inductors can attain a wide input-voltage and load range which uses a constant switching frequency, by controlling the time duration of the simultaneous conduction of the two switches. Among other current-fed type boost converters the presented topology is attractive due to the high voltage conversion ratio, less stress on the components and less switch conduction loss. To verify the feasibility of this topology, the principles of operation, theoretical analysis, and experimental waveforms are presented for a 1 kW prototype.

scholarly journals Reliability evaluation of buck converter based on thermal analysis

2019 ◽  
pp. 217-227
Keyword(s):  
Thermal Analysis ◽  
Duty Cycle ◽  
Reliability Evaluation ◽  
Buck Converter ◽  
Junction Temperature ◽  
Switching Frequency ◽  
Time To Failure ◽  
Reliability Design ◽  
Insulated Gate Bipolar Transistor ◽  
Power Electronic Circuits

The design, which is based on the concept of reliability, is impressive. In power electronic circuits, the reliability design has been shown to be useful over time. Moreover, power loss in switches and diodes plays a permanent role in reliability assessment. This paper presents a reliability evaluation for a buck converter based on thermal analysis of an insulated-gate bipolar transistor (IGBT) and a diode. The provided thermal analysis is used to determine the switch and diode junction temperature. In this study, the effects of switching frequency and duty cycle are considered as criteria for reliability. A limit of 150°C has been set for over-temperature issues. The simulation of a 12 kW buck converter (duty cycle = 42% and switching frequency = 10 kHz) illustrates that the switch and diode junction temperature are 117.29°C and 122.27°C, respectively. The results show that mean time to failure for the buck converter is 32,973 hours.

Sign in / Sign up

Export Citation Format

Share Document