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The proposed xenon lamp drivers are composed of the capacitor charging and main pulse unit, simmer power supply unit, and series trigger unit. The capacitor bank stores the energy to generate pulses of light sintering and the series trigger ionizes the xenon in the lamp. The simmer not only sustains this ionized xenon gas but also improves the better lamp lifetime and efficiency by reducing the number...
The high frequency high voltage (HFHV) transformer is one of the biggest contributors for conducted electromagnetic interference (EMI) emission of switching power supply. The transformer technologies for reducing conducted EMI emission focus on the shielding and changing the winding structures. However, for suppressing conducted EMI, the suppression capability of shielding is limited; current methods...
The efficiency of wireless power transfer (WPT) system is strongly influenced by the lateral misalignment between the transmitting coil and the receiving coil. To solve this problem, this paper proposed a multi-coil switching coupler to increase the coil lateral misalignment tolerance, in which the transmitter consists of thirteen hexagon coils, including three power supply areas and each area consists...
Envelope Tracking (ET) Technique can remarkably improve the efficiency of the power amplifier (PA) in the modern Mobile Communication Base Station. Switch-Linear Hybrid (SLH) ET power supply has become the mainstream structure, which gives consideration to high efficiency and high bandwidth. However, the SLH ET power supply with single switching converter suffers a low efficiency as increasing the...
In this study, design considerations of gate driver for silicon carbide (SiC) power devices is discussed. The work is focused in minimizing the common-mode current injection into the control circuit, thereby adapting the gate circuit to operate at higher dv/dt of fast switching transients. By reducing the common-mode interference with the control circuit, the signal integrity can be increased, spurious...
Recently, resonant inverters have been employed to generate high voltage high frequency AC power for plasma generator of the semiconductor processing equipment. This inverter is beneficial in low switching loss owing to its natural soft-switching capability under inductive load impedance. Generally, the resonant inverter for plasma generator is designed to have inductive load using an impedance matching...
Electrical physics text book theory tells us that charging a capacitor is much less efficient than replenishing the energy in a discharged electro-chemical battery. If a fully discharged capacitor is pumped with a charge of Q coulombs, it stores 1/2QV while dissipating the same amount of energy in the loop resistance. However, if the same charge is pumped into a re-chargeable electrochemical cell...
In this paper, a novel three-phase rectifier based on triple line-voltage cascaded VIENNA converters has been proposed. A comprehensive analysis to the proposed converter is presented. Compared to conventional three-phase cascaded H-bridge converters, in the proposed new multilevel converters, the switch voltage stress is reduced, and fewer switches and dc capacitors are required under the similar...
In this paper, a topology of three-phase buck rectifier which is suitable for the low output voltage application and its control principle are proposed to reduce the cost and simplify the control. The proposed topology uses the phase voltage instead of the line voltage to supply power. Thus, it can decrease the rating voltage of switching devices, and save the cost. Moreover, the proposed control...
Reliable power supplies are indispensable for the control component of high voltage direct current switches. But power cannot be directly acquired from the high voltage side of the grid. Wireless power transmission is a practicable solution of supplying power. The efficiency of wireless power transmission system is directly influenced by the efficiency of the power supply. A power supply used on wireless...
Electric power supply installations must ensure a permanent power feed to the train traffic security installations. Any damage to the power feed components lead to delays in train traffic. This work proposed a modern computer-based diagnosis method based on diagnosis charts, both created by the authors. Running the hereby proposed software package and following its indications, the failure cause can...
The article designed a military grade switchboard with Gigabit POE power capacity through 5 ports by researching switch principle and actual requirement. Firstly, the whole circuit and associated systems were introduced. Secondly, the circuit which used network management chip 88E6161 of Marvel Company and microcontroller chip PD69104B of Micro-semi Company was designed and emulated, the specific...
This paper studies the analysis and implementation of intelligent information processing and fault diagnosis technology for distribution automation system. In the fault diagnosis is mainly considering the influence of uncertain information and coupling information, processing technology and multi-source information fusion of multi-source information mining depth based on data driven, and switch level,...
Low-power becomes a critical issue for modern VLSI designs. Unified Power Format (UPF) was invented for power management and enables the low-power design flow. In the UPF specification, controlling cells (including isolation cells, level shifter and retention cells) need to be placed properly to prevent unpredictable errors. Therefore, many commercial EDA tools support to examine the correctness of...
A helical-type fusion facility uses a large-scale superconducting DC magnet. To maintain the coil current of this magnet during steady-state operation, a large output current supplied by a very-low-voltage power supply is necessary. For this purpose, a DC power supply using a mechanical contact as a switching device was designed, and a small model of the contact was tested.
Focus is on the design and development of an auxiliary power supply converter for HVDC and FACTS applications, utilising integrated gate-commutated thyristors. Due to relatively high requirements for gate drive power and operating voltage of 2.8 kV, special measures have to be considered when designing such systems. The tapped-inductor buck converter topology was chosen as the first non-isolated conversion...
A new approach to solving the problem of interaction between the main suppliers of electricity and private generating stations of different nature in the island renewable energy micro-grids. This approach can be used for small power islands with different natural conditions, which stipulate the use of solar, wind or other energy sources in order to evaluate the dynamic electricity pricing.
This paper presents a new power supply consisting of an inverter and a power factor correcting stage with an integrated active energy storage for servo drives. The energy storage is realized with a capacitor and a DC-DC-converter. This enables the power supply to reuse the braking energy of servo drives instead of losing it in a braking chopper resistor. The main advantage is the simple integration...
The digital control has the attractive capability, for instance, the high-performance function and the energy management capability. On the other hand, there are issues which must be solved for the actual implementation. The proposed method can solve some of them, namely the transient response, the dynamic characteristics and the precision of the controller, with the simple method.
This article is devoted to the research of diagnostics and monitoring of power supply devices of railway automation and remote control. The analysis of failure statistics of power supply devices in recent years has been carried out and the most vulnerable elements of power supply systems have been identified on its basis. Objects are described, the state of which must be diagnosed in the input devices,...
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