In this paper, a new cell-to-cell charge equalization converter using multiwinding transformer is proposed. The proposed scheme achieves the direct transportation by buck-boost and flyback operation. operation, adjacent two cells share either current path or tap of transformer. Therefore, number windings ia cut in half comparison to batteries, resulting small circuit size. To verify operation converter, an experiment with lithium-ion battery stack performed.

This paper describes nonisolated high step-up DC-DC converters using zero voltage switching (ZVS) boost integration technique (BIT) and their light-load frequency modulation (LLFM) control. The proposed ZVS BIT integrates a bidirectional converter with series output module as parallel-input series-output (PISO) configuration. It provides many advantages such device utilization, capability, power thermal stress distribution, switch clamping, soft capability. As an example of BIT, flyback...

Purpose With the increasing use of microsurgical techniques in clinical work, regular laboratory training these has become essential. Several specialized materials have been used for this purpose. We investigated whether effective could be provided with greater convenience and less expense using fresh chicken thighs. Also, we present histologic characteristics femoral neurovascular structures. Methods The bundles thighs were dissected. Microanastomosis vessels nerves performed aid a...

This paper proposes an on/off control of boost power factor correction (PFC) converters to improve the light-load efficiency in paralleled supply units (PSUs) for servers. The proposed scheme operates PFC stages two PSUs alternately during one cycle a 60-Hz ac input only at light loads. improves without deteriorating heavy-load by reducing load-independent losses such as capacitive turn-on and core losses. In addition, alleviates harmonic distortion discontinuous conduction mode region....

A general boost converter has limited voltage step-up ratio because of its parasitic resistances. Thus, it is not applicable for high applications. As a solution, combining with series output module can be considered to supplement the insufficient ratio. By applying this concept, new integrated boost-sepic (IBS) converter, which provides additional help an isolated sepic proposed in paper. Since and share inductor switch, structure simple. Moreover, IBS needs no current-snubber diodes, since...

This paper proposes a solid-state pulsed power modulator (PPM) with fast rising/falling time and high repetition rates to drive pockels cells. Since the proposed circuit is based on modular structure using silicon carbide (SiC) metal-oxide field-effect transistors (MOSFETs) for bypass devices as well main switches, it can achieve switching speed reliability. In addition, by control scheme employing voltage difference, accomplish rate short pulsewidth. Design implementation of 1.8-kV PPMs 1...

This article describes the compact solid-state Marx modulator (SSMM) with a fast rising time and short pulsewidth based on modular structure. By stacking of TO-263-7 packaged silicon carbide <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">mosfet</small> s having high voltage switching capabilities, designed circuit consists three components, including capacitor, an xmlns:xlink="http://www.w3.org/1999/xlink">on</small> switch for applying pulse to...

In this article, we proposed a bidirectional dual active bridge (DAB) converter adopting boost-up function. The can be implemented by adding only one capacitor to the high voltage side without additional components. By utilizing function, achieve higher output power than conventional DAB under same leakage inductance condition. comparison with resonant in addressing limitation, reduce switching and conduction losses due low turn- <sc xmlns:mml="http://www.w3.org/1998/Math/MathML"...

This paper proposes a new gate driving circuit for the solid-state pulsed power modulator (SSPPM) based on semiconductor devices. The proposed can be easily implemented by applying short signal to bypass insulated bipolar transistor (IGBT), i.e., switches connected in parallel with load instead of pull-down resistor. IGBT_BPs are turned at end-point pulse. It quickly discharge pulse voltage applied load. In addition, it operate as diode, which is used protect when malfunctions, using...

This article describes the development of an 80-kW high-voltage power supply (HVPS) to drive X-ray tube. Since developed HVPS is based on LCC resonant converter with a symmetrical bipolar voltage multiplier (SBVM), it shows many superior features such as soft switching capability and low imbalance among stages. In addition, proposed circuit has high density because series capacitor removed by using method converting SBVM into capacitors full-wave rectifier. Furthermore, suggested transformer...

This paper describes a bipolar pulsed power supply for strategic mineral exploration. Depending on the operating conditions, is capable of delivering required high voltage and low current or when operated, respectively, in either grounded dipole mode loop mode. Based 500-V 12.5-A unit module, series parallel connections four modules are configured to satisfy both (2000 V) (50 A), respectively. A module comprising an LCC resonant converter full-bridge-based pulse-switching designed. In order...

This article proposes a modular pulsed power modulator (PPM) with short pulse width and high repetition rate for lasers. The presented PPM is based on the structure to use semiconductor switches low voltage ratings since these have fast switching speed, which an essential requirement generate pulses. In addition, make gate signal also needed pulses, driver circuit that applies positive negative voltages asymmetrically proposed. Moreover, heatsink minimize parasitic capacitances rate....

In this paper, a new battery equalizer applying two-switch flyback topologies is proposed. Since the proposed circuit based on structure, voltage stress switches can be clamped at stack level. Furthermore, number of active devices minimized by using common switch and clamping diode. The operational principle, theoretical analysis, design consideration, implementation method are presented. addition, to confirm performance equalizer, experimental results from four 3.9 V 2600 mAh lithium-ion batteries

Recently, permanent magnet synchronous motors are applied to various applications such as electric vehicle, aerospace, medical service, and military due several outstanding characteristics. Because of the importance high reliable operation in these areas, many researches which related fault detection diagnosis inverter systems conducted. In this paper, a new simple method voltage source for motor is proposed. The feasibility proposed proved by simulation experiment. By experiments, rapid...

Paralleled power systems require a hot swap which indicates the replacement of converter module without shutting down whole system for easy maintenance, repair, and upgrade. A practical issue is an overcurrent toward newly activating due to inevitable nonuniformity among paralleled modules, causes excessive current thermal stresses even leads device failure. In this paper, by analyzing start-up operation during swap, reason demonstrated. Then, based on analysis, method increasing voltage...

In this paper, the detailed design of an ion pump power supply is presented. The was designed based on LCC resonant topology with high switching frequency to take advantage a smaller transformer for isolation. Because proposed has 7-kV, 50-mA specification, high-voltage insulation required. order secure reliability, eight separate transformers that share primary turns. spacing between turns and secondary allows increases in leakage inductance parasitic capacitance transformer. A compact can...

This letter proposes a high output voltage dc-dc converter topology with series stacked modules. To implement the proposed modular structure, balancing of modules and simplification control circuitry were considered major design objectives. achieve between modules, we split-secondary transformer winding structure distributed connections to rectifier circuit blocks. Each includes two secondary windings, each wire pair connected different circuit. Consequently, one receives ac power...

This article describes the development of a 120 kV and 60 kW cathode power supply (CPS) for an electron beam welding (EBW) system. Since developed CPS is based on three phase LCC resonant converter, it shows many superior features such as parasitic component utilization low output voltage ripple. In addition, by adopting symmetrical bipolar multiplier (SBVM) rectifier, imbalance among SBVM stages can be reduced even at high current. Therefore, effectively achieve with stress components....

A zero-voltage switching (ZVS) flyback-boost (FB) converter with a voltage-doubler rectifier (VDR) has been proposed. By combining the common part between flyback and boost as parallel-input/series-output (PISO) configuration, this proposed circuit can increase step-up ratio clamp surge voltage of switches. The secondary VDR provides further extended well its stress to be clamped. An auxiliary switch instead diode enables all switches turned on under ZVS conditions. zero-current turn-off...

In this paper, a charge equalization converter using multi-winding transformer is proposed. The proposed scheme achieves the cell-to-cell transportation by buck-boost and flyback operation. operation, adjacent two cells share current path or secondary tap of transformer. Therefore, number windings cuts in half comparison to conventional converter, resulting small circuit size. To verify operation experiment for lithium-ion battery stack performed.

In a deep learning model, the effect of model may vary depending on setting hyperparameters. Despite importance such hyperparameter determination, most previous studies related to burst detection models water supply pipe network used hyperparameters applied in other fields as-is or made trial-and-error based experience, which is limitation. this paper, study was conducted determination neural (DNN)-based real-time accidents. The predicted pressure by using operation data units 1 min, and...

This article proposes an optimal design of LCC resonant converter with a phase shift control for fuel cell system that has wide input and output voltage ranges. The proposed focuses on the circulating energy minimization by adjusting transformer turns ratio according to maximum gain tank. makes root mean square value current turn- <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">off</small> stationary even though tank change. Thus, designers can...