The Experts below are selected from a list of 273 Experts worldwide ranked by ideXlab platform

S.v. Gulakov - One of the best experts on this subject based on the ideXlab platform.

  • Development of Power Supply for Resistance Welding Machine
    2019 IEEE International Conference on Modern Electrical and Energy Systems (MEES), 2019
    Co-Authors: Svetlana Podnebennaya, V.v. Burlaka, S.v. Gulakov
    Abstract:

    A method for controlling a single-phase high-frequency power supply for Resistance weding machine has been developed. It allows operation with improved power factor and low harmonic distortion of the mains current waveshape. A prototype of the power supply of Resistance Welding machine has been developed. Experimental verification of the developed power supply of Resistance Welding machine confirmed the correctness of the results obtained as a result of mathematical modeling and the high efficiency of the developed power supply.

  • Power Supply of Resistance Welding Machine as Shunt Active Power Filter
    2019 IEEE 2nd Ukraine Conference on Electrical and Computer Engineering (UKRCON), 2019
    Co-Authors: Svetlana Podnebennaya, V.v. Burlaka, S.v. Gulakov
    Abstract:

    An original approach to application of power supplies for Resistance Welding machines is offered. It is based on the use of the power supply, based on direct three-to-one phase matrix converters as shunt active power filter. During technological pauses in the operation of Resistance Welding machines it’s power supply can be use as CSI-based active power filter. The DC-link of this filter is the primary winding of Welding transformer. Proposed power circuit topology and control system is simulated using MATLAB. The simulation results confirmed high effectiveness of proposed aproach. It became possible to achieve active filter functions from the Resistance Welding power supply.

  • Development of Three Phase Power Supplies for Resistance Welding Machines
    2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO), 2018
    Co-Authors: Svetlana Podnebennaya, V.v. Burlaka, S.v. Gulakov
    Abstract:

    An original approach to creating power supplies for Resistance Welding machines is offered. It is based on the use of the direct three-to-one phase matrix converters as power supplies for Resistance Welding machines. The matrix converter control method which allows to provide high power factor of the developed power supply is proposed. Proposed power circuit topology and control system is simulated using MATLAB. The simulation results confirmed high effectiveness of using proposed power supply with developed control method. It became possible to achieve almost unity power factor and provide high quality of output parameters (primarily output power) regulation.

Lin Ye - One of the best experts on this subject based on the ideXlab platform.

  • an experimental study of Resistance Welding of carbon fibre fabric reinforced polyetherimide cf fabric pei composite material
    Applied Composite Materials, 1999
    Co-Authors: Lin Ye
    Abstract:

    This paper presents an experimental investigation of Resistance Welding of carbon fibre fabric reinforced polyetherimide composites (CF fabric/PEI). The heating elements were made from a single CF fabric/PEI prepreg sheet with neat PEI films co-moulded to both surfaces. Welding was conducted on a Welding area of 25 mm × 12 mm. The quality of the welded specimens was studied using a non-destructive evaluation technique (C-scan) as well as a mechanical test (lap shear strength). The relationships between input power, input energy, Welding time and consolidation pressure were studied. Experimental results indicated that sufficient joining was obtained at a power level from 80 to 160 kW/m2, under an initial Welding pressure of 0.15 to 0.40 MPa. The maximum lap shear strength achieved through Resistance Welding was equivalent to that of the compression moulded benchmark. The fracture surfaces of welded specimens showed mostly cohesive-failure or intralaminar failure. An optimum processing window is proposed for the Resistance Welding of CF fabric/PEI composite system.

  • An Experimental Study of Resistance Welding of Carbon Fibre Fabric Reinforced Polyetherimide (CF Fabric/PEI) Composite Material
    Applied Composite Materials, 1999
    Co-Authors: Lin Ye
    Abstract:

    This paper presents an experimental investigation of Resistance Welding of carbon fibre fabric reinforced polyetherimide composites (CF fabric/PEI). The heating elements were made from a single CF fabric/PEI prepreg sheet with neat PEI films co-moulded to both surfaces. Welding was conducted on a Welding area of 25 mm × 12 mm. The quality of the welded specimens was studied using a non-destructive evaluation technique (C-scan) as well as a mechanical test (lap shear strength). The relationships between input power, input energy, Welding time and consolidation pressure were studied. Experimental results indicated that sufficient joining was obtained at a power level from 80 to 160 kW/m2, under an initial Welding pressure of 0.15 to 0.40 MPa. The maximum lap shear strength achieved through Resistance Welding was equivalent to that of the compression moulded benchmark. The fracture surfaces of welded specimens showed mostly cohesive-failure or intralaminar failure. An optimum processing window is proposed for the Resistance Welding of CF fabric/PEI composite system.

Oleksandr Bondarenko - One of the best experts on this subject based on the ideXlab platform.

  • Improved method of evaluating power losses in pulse converters of micro Resistance Welding machines
    Технология и конструирование в электронной аппаратуре, 2018
    Co-Authors: Oleksandr Bondarenko, T. O. Ryzhakova, Yu. V. Kozhushko
    Abstract:

    The paper represents Resistance Welding characteristics and construction features of power supplies for Resistance Welding. The authors give an overview of circuit topologies of converters for Resistance Welding and distinguish the most promising one — the transistor buck converter with a synchronous transistor. It is shown that in order to ensure acceptable energy efficiency of power supply for Resistance Welding machines, while maintaining sufficient accuracy of current regulation in a Welding contact, special modes of pulse transistor converters are used. The analysis of Resistance Welding features — high currents, low voltages — makes it possible to presume that the evaluation of the power losses in semiconductor elements only is insufficient and needs to be complemented by taking into account the losses on the inductive element of the converter circuit. In this work, the authors propose the method of estimating the power losses in the pulse buck converter of the power supply of Resistance Welding machine, which allows for more accurate calculations at the design stage due to consideration of the power losses on the inductive element of the circuit. The methodology is to calculate the total power losses as the sum of power losses on all individual elements of the circuit. Power losses on inductance is calculated using the Steinmetz equation. The calculations carried out with this technique proved the advisability of taking into account the power losses on the inductive element, especially in the region of high frequencies. The obtained diagrams demonstrated the dependency of the power losses in the converter on the frequency at different values of current and voltage.

  • Control features of multicell-type current regulator for Resistance Welding
    2017 IEEE 58th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON), 2017
    Co-Authors: Ievgen Verbytskyi, Oleksandr Bondarenko, Elizaveta Liivik
    Abstract:

    The features of Resistance Welding process are considered. A multiceli buck converter as a simplest, efficient and stable topology for Resistance Welding power supply is proposed. The efficiency of a buck converter cell is analyzed. The particularities of Welding pulse generation are described. Relay control as an appropriate method for minimizing the Welding pulse curve error is analyzed. The restrictions of relay method use for multiceli converter topology are shown. A modified strategy to reduce the error of Welding pulse generation by multiceli converter is proposed. The theoretical aspects of the converter design are verified with MATLAB Simulink.

  • Modular Power Supply for Micro Resistance Welding
    Electrical Control and Communication Engineering, 2017
    Co-Authors: Oleksandr Bondarenko, Ievgen Verbytskyi, Vadym M. Prokopets, Oleksandr Kaloshyn, Denys Spitsyn, Tetiana Ryzhakova, Yuliia Kozhushko
    Abstract:

    The paper is devoted to the important issue of enhancing the circuitry and characteristics of power supplies for micro Resistance Welding machines. The aim of the work is to provide high quality of input current and to increase the energy efficiency of the output pulse generator by means of improving the circuit topologies of the power supply main blocks. In the paper, the principle of constructing the power supply for micro Resistance Welding, which provides high values of output Welding current and high accuracy of Welding pulse formation, makes it possible to reduce energy losses, and provides high quality of consumed input current, is represented. The multiphase topology of the charger with power factor correction based on SEPIC converters is suggested as the most efficient for charging the supercapacitor storage module. The multicell topology of the supercapacitor energy storage with voltage equalizing is represented. The parameters of the converter cells are evaluated. The calculations of energy efficiency of the power supply’s input and output converters based on suggested topologies are carried out and verified in MATLAB Simulink. The power factor value greater than 99 % is derived.

  • Estimation of supercapacitor efficiency in use for Resistance Welding
    2015 16th International Conference on Computational Problems of Electrical Engineering (CPEE), 2015
    Co-Authors: Igor Pentegov, Volodymyr Sydorets, Iuliia Bondarenko, Oleksandr Bondarenko, Pavlo Safronov
    Abstract:

    The appearing of supercapacitor internal Resistance influence on efficiency of energy delivery in Resistance Welding circuit was studied in the paper. The dependencies of supercapacitor energy storage efficiency on load Resistance were obtained. The limits of supercapacitor use for Resistance Welding area were determined.

  • Multicell-type transistor converter with combined control for micro Resistance Welding
    2011 7th International Conference-Workshop Compatibility and Power Electronics (CPE), 2011
    Co-Authors: Yuriy E. Paerand, Oleksandr Bondarenko, Iuliia V. Bondarenko
    Abstract:

    Micro Resistance Welding is effective way to reliably join small-scale parts in electronics industry and instrument-making. High quality welded joints are obtained by accurate regulation of Welding current with transistor converter module which is one of the most important sub-systems in micro Resistance Welding machine. Multicell-type transistor converter with combined control, represented in the paper, provides high accuracy of current regulation and high energy efficiency therefore is proposed for use in micro Resistance Welding.

Svetlana Podnebennaya - One of the best experts on this subject based on the ideXlab platform.

  • Development of Power Supply for Resistance Welding Machine
    2019 IEEE International Conference on Modern Electrical and Energy Systems (MEES), 2019
    Co-Authors: Svetlana Podnebennaya, V.v. Burlaka, S.v. Gulakov
    Abstract:

    A method for controlling a single-phase high-frequency power supply for Resistance weding machine has been developed. It allows operation with improved power factor and low harmonic distortion of the mains current waveshape. A prototype of the power supply of Resistance Welding machine has been developed. Experimental verification of the developed power supply of Resistance Welding machine confirmed the correctness of the results obtained as a result of mathematical modeling and the high efficiency of the developed power supply.

  • Power Supply of Resistance Welding Machine as Shunt Active Power Filter
    2019 IEEE 2nd Ukraine Conference on Electrical and Computer Engineering (UKRCON), 2019
    Co-Authors: Svetlana Podnebennaya, V.v. Burlaka, S.v. Gulakov
    Abstract:

    An original approach to application of power supplies for Resistance Welding machines is offered. It is based on the use of the power supply, based on direct three-to-one phase matrix converters as shunt active power filter. During technological pauses in the operation of Resistance Welding machines it’s power supply can be use as CSI-based active power filter. The DC-link of this filter is the primary winding of Welding transformer. Proposed power circuit topology and control system is simulated using MATLAB. The simulation results confirmed high effectiveness of proposed aproach. It became possible to achieve active filter functions from the Resistance Welding power supply.

  • Development of Three Phase Power Supplies for Resistance Welding Machines
    2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO), 2018
    Co-Authors: Svetlana Podnebennaya, V.v. Burlaka, S.v. Gulakov
    Abstract:

    An original approach to creating power supplies for Resistance Welding machines is offered. It is based on the use of the direct three-to-one phase matrix converters as power supplies for Resistance Welding machines. The matrix converter control method which allows to provide high power factor of the developed power supply is proposed. Proposed power circuit topology and control system is simulated using MATLAB. The simulation results confirmed high effectiveness of using proposed power supply with developed control method. It became possible to achieve almost unity power factor and provide high quality of output parameters (primarily output power) regulation.

Wen-syang Hsu - One of the best experts on this subject based on the ideXlab platform.

  • Experimental investigation and characterization of micro Resistance Welding with an electro-thermal actuator
    Journal of Micromechanics and Microengineering, 2009
    Co-Authors: Chun Wei Chang, Cheng-chi Yeh, Wen-syang Hsu
    Abstract:

    Resistance Welding is a common scheme of assembly on the macro scale by pressing together two workpieces with current passing through them to generate joule heating at the contact region due to high contact Resistance. However, micro assembly by Resistance Welding is seldom reported. Here, Resistance Welding with an electro-thermal microactuator to assemble micro Ni structures is experimentally investigated and characterized. The bent-beam electro-thermal microactuator is designed to provide the necessary displacements and pressing forces. The two-mask metal-based surface micromachining process is adopted to fabricate the micro Ni structures. The calibrated initial contact Resistance is shown to decrease with increasing contact pressure. Furthermore, stronger Welding strength is achieved at a smaller initial contact Resistance, which indicates that a larger clamping force would enhance the Welding strength as large as 3.09 MPa (74.4 ?N) at a contact Resistance of 2.7 ? here. The input Welding energy is also found to be a critical factor. In our tests, when Welding energy is below the threshold limit of 0.05 J, the Welding trials all fail. For the energy between 0.05 J and 1 J, there is a transition from a lower yield of 33.3% to a higher yield of 58.3%. At high Welding energy, between 1 and 10 J, 100% yield is achieved. With the demonstration and characterization of micro Resistance Welding by the electro-thermal microactuator, the scheme proposed here would be helpful in the automation of micro assembly.

  • Characterization of Micro Resistance Welding with Electro-thermal Actuator for Micro Assembly
    2008
    Co-Authors: Chun Wei Chang, Wen-syang Hsu
    Abstract:

    Optical MEMS devices rely on the micro assembly to achieve re-positioning, such as lifted up micro mirrors and lens and micro Resistance Welding benefits assembly of optical components. However, the characteristics of micro Resistance Welding are still unknown. The purpose of this study is to characterize micro Resistance Welding with electro-thermal actuator for micro assembly. In order to characterize influence of operation parameters on micro Resistance Welding, important parameters including contact pressure, contact Resistance and electrical energy are calibrated. Further, Welding strength provide robust join are also measured. The idea of Resistance Welding is based on generated heat by ohm’s law to melt material. From measured results, contact Resistance decreases with increasing contact pressure due to increasing contact area. The stronger Welding strength can be achieved at a smaller initial contact Resistance which means that a larger clamping force could enhance the Welding strength. The maximum Welding strength is 74.4 µN at 2.7 Ω. Further, Welding energy affects yield significantly. At high Welding energy, between 1 to 10 J, the yield can reach 100 %. The energy below 0.05 J would not generate adequate heat to weld structure.

  • Characterization of micro Resistance Welding with electro-thermal actuator for micro assembly - art. no. 68840G
    Reliability Packaging Testing and Characterization of MEMS MOEMS VII, 2008
    Co-Authors: Chun Wei Chang, Wen-syang Hsu
    Abstract:

    Optical MEMS devices rely on the micro assembly to achieve re-positioning, such as lifted up micro mirrors and lens and micro Resistance Welding benefits assembly of optical components. However, the characteristics of micro Resistance Welding are still unknown. The purpose of this study is to characterize micro Resistance Welding with electro-thermal actuator for micro assembly. In order to characterize influence of operation parameters on micro Resistance Welding, important parameters including contact pressure, contact Resistance and electrical energy are calibrated. Further, Welding strength provide robust join are also measured. The idea of Resistance Welding is based on generated heat by Ohm's law to melt material. From measured results, contact Resistance decreases with increasing contact pressure due to increasing contact area. The stronger Welding strength can be achieved at a smaller initial contact Resistance which means that a larger clamping force could enhance the Welding strength. The maximum Welding strength is 74.4 μN at 2.7 ΩFurther, Welding energy affects yield significantly. At high Welding energy, between 1 to 10 J, the yield can reach 100%. The energy below 0.05 J would not generate adequate heat to weld structure.

  • Micro Assembly by Micro Resistance Welding with Electro-Thermal Actuators
    2007 2nd IEEE International Conference on Nano Micro Engineered and Molecular Systems, 2007
    Co-Authors: Cheng-chi Yeh, Chun Wei Chang, Junwei Chung, Wen-syang Hsu
    Abstract:

    Here micro Resistance Welding to assemble micro Ni structures with electro-thermal micro actuators is proposed and demonstrated. Since the contact point of two structures will have large contact Resistance, high local temperature can be generated with current passing through due to Joule heating. In order to move the micro structure and provide Welding pressure to generate proper contact Resistance between two micro structures, bent-beam electro-thermal actuators are used here. By proper design on the size and the number of actuators, the feasible operation parameters on contact Resistance and pressure are identified. It is shown that micro Resistance Welding can be achieved with the contact Resistance from 4.6 Omega to 12 Omega at the contact pressure from 7.2 to 39.3 MPa.