scholarly journals A New Design Technique for Sub-Nanosecond Delay and 200 V/ns Power Supply Slew-Tolerant Floating Voltage Level Shifters for GaN SMPS

2019 ◽  
Vol 66 (3) ◽  
pp. 1280-1290 ◽  
Author(s):  
Dawei Liu ◽  
Simon J. Hollis ◽  
Bernard H. Stark
Keyword(s):  
Power Supply ◽  
Design Technique ◽  
Voltage Level ◽  
Level Shifters

scholarly journals Design of 370-ps Delay Floating-Voltage Level Shifters With 30-V/ns Power Supply Slew Tolerance

2016 ◽  
Vol 63 (7) ◽  
pp. 688-692 ◽  
Author(s):  
Dawei Liu ◽  
Simon J. Hollis ◽  
Harry C. P. Dymond ◽  
Neville McNeill ◽  
Bernard H. Stark
Keyword(s):  
Power Supply ◽  
Voltage Level ◽  
Level Shifters

Energy-Efficient Wide-Range Voltage Level Shifters Reaching 4.2 fJ/Transition

2018 ◽  
Vol 1 (2) ◽  
pp. 34-37 ◽  
Author(s):  
Reza Lotfi ◽  
Mehdi Saberi ◽  
S. Rasool Hosseini ◽  
Amir Reza Ahmadi-Mehr ◽  
Robert Bogdan Staszewski
Keyword(s):  
Energy Efficient ◽  
Voltage Level ◽  
Wide Range ◽  
Level Shifters

Rekonstrukcija transformatorske stanice 35/10kV u spoljašnje razvodno postrojenje 20kV 20211, XXIII

2021 ◽  
Vol 23 (1) ◽  
pp. 61-64
Author(s):  
Srbislav Sarić ◽  
Biljana Sarić
Keyword(s):  
Power Supply ◽  
Preventive Maintenance ◽  
Financial Resources ◽  
Distribution Area ◽  
Power Equipment ◽  
Voltage Level ◽  
The World ◽  
Operational Readiness ◽  
Successful Business ◽  
Novi Sad

In the distribution area of Novi Sad, owned by ODS EPS Distribucija, there are 35 substations 35/10kV that are on average over 50 years old. Considering the tendency to gradually eliminate the voltage levels of 35kV and 10kV in this distribution area and the transition to the voltage level of 20kV, some of these substations are planned for reconstruction into 20kV distribution plants. Reconstruction of these substations requires large financial resources, because their construction part is in a very bad condition, electric power equipment is unreliable and difficult to maintain, and operational readiness is an increasingly important factor in presenting successful business. During the reconstruction of these transformer stations, the possibility of a backup power supply route for electricity customers, the speed of intervention and the smooth performance of preventive maintenance must be taken into account. The appearance of reclosers opened a new chapter in the world of electricity. Namely, now the above problems and requirements can be solved in a simpler and cheaper way with the use of reclosers. The paper will present a proposal for the reconstruction of the substaion 35/10 kV "Kuzmin" in the area of the Branch Distribution Sremska Mitrovica, which has been operating for more than 60 years, in an external 20 kV distribution plant formed with the help of reclosers built on steel lattice poles. The proposed solution can be used to solve the same or similar problems, primarily in the distribution area of Novi Sad.

Conventional DC Voltage Operating System for High Speeed Traction Power Supplies Using LLC-HPQC Control

2015 ◽  
Vol 4 (4) ◽  
pp. 118
Author(s):  
Ch. Lenin Babu ◽  
P. Harinath Reddy ◽  
T. Reddi Sekhar
Keyword(s):  
Power Supply ◽  
High Speed ◽  
Reactive Power ◽  
Design Procedure ◽  
Power Supplies ◽  
Parameter Design ◽  
Voltage Level ◽  
Harmonic Compensation ◽  
Traction Power Supply ◽  
Traction Power

<p>In this paper a hybrid power quality compensator (HPQC) is proposed for compensation in cophase traction power supply and minimum dc operation voltage is achievable for high-speed traction power supply. The parameter design procedure for minimum dc operation voltage in HPQC as well as minimum voltage rating with load PF is discussed. The detailed discussions of proposed circuit configurations of HPQC are provided in section II, together with comparison with conventional RPC. In comparison with conventional railway power compensator proposed HPQC can achieve reduced dc link voltage level. It is also verified through simulations results that the LLC-HPQC would operate at the minimum voltage with the proposed parameter design. HPQC is able to provide system unbalances, reactive power, and harmonic compensation in cophase traction power with reduced operation voltage. The cophase traction power supply with proposed HPQC is suitable for high-speed traction applications.</p>

scholarly journals Development of Interrelated Voltage Regulation System for Coal Mines Energy Efficiency Improving

2018 ◽  
Vol 41 ◽  
pp. 03013 ◽  
Author(s):  
Fedor Nepsha ◽  
Roman Belyaevsky
Keyword(s):  
Energy Efficiency ◽  
Power Consumption ◽  
Power Supply ◽  
Coal Mines ◽  
Voltage Regulation ◽  
Active Power ◽  
Regulation System ◽  
State Matrix ◽  
Voltage Level ◽  
Supply Systems

In this paper, the authors propose an algorithm for interrelated voltage regulation in the power supply system of coal mine which allows to provide a normative voltage level and to minimize the level of active power consumption. A feature of the proposed algorithm is a separate consideration of discrete and nondiscrete variables. Nondiscrete variables are represented as a state matrix. The optimization of nondiscrete variables is performed for each state. The algorithm chooses a state with the minimal active power consumption. The obtained values of discrete and nondiscrete variables are transferred in the form of control signals to voltage regulation devices. In this case, the periodicity of the switching is determined by the resource of the on-load tap-changing device. The use of this algorithm will theoretically allow increasing the energy efficiency of power supply systems of coal mines.

scholarly journals Design techniques for passive wireless microsystems

2021 ◽  
Author(s):  
Xiongliang Lai
Keyword(s):  
Power Consumption ◽  
Transmission Rate ◽  
Data Communication ◽  
Modulation Scheme ◽  
Voltage Level ◽  
Passive Wireless Microsystems ◽  
Level Shifters ◽  
Wireless Microsystems ◽  
On Chip ◽  
Design Techniques

The unique advantage of harvesting power wirelessly has evolved passive wireless microsystems to a fast-growing high-impact technology. In this dissertation, several new design techniques are proposed for the increasingly stringent requirements of passive wireless microsystems. The absence of on-board batteries imposes ultralow power consumption of passive wireless microsystems. Recent research reveals that multi-voltage systems-on-a-chip dramatically reduce power consumption such that power-efficient on-chip voltage level shifters are critically needed. This dissertation proposes a novel set of voltage level shifters built upon diode-based clamper-rectifier configurations. The voltage level shifters are passively powered by incoming signals with no static current consumption and are able to shift the incoming signals bidirectionally to suit the different voltage domains. The shifting steps could be continuous and are not bounded by the discrete transistor thresholds and power rails. A second bottleneck of passive wireless microsystems is the wireless power-harvesting efficiency that limits the wireless communication distance and the on-chip circuitry complexity and functionality. This dissertation proposes a transformer-based impedance matching network that greatly improves the power transfer efficiency from the receiving antenna to the on-chip circuit loads. The transformer is also capable of automatically calibrating its input impedance to match to the antenna impedance by a novel low-power varactor current tuning technique. In passive wireless microsystems, data modulation scheme largely determines the power transmission efficiency and data communication speed. Exploiting the constant carrier envelop of FSK modulation, this dissertation proposes a dual-tank architecture for FSK receivers in passive wireless microsystems. The dual receiving tanks significantly improves the power conversion efficiency of on-chip AC-to-DC voltage multipliers by providing high-quality-factor resonating tank voltages at each of the alternating FSK carriers. High data transmission rate is also achieved by exploring the dual tanks in an all-digital and a voltage-level shifting FSK demodulators.

The eff ect of time reducing of train-to-train margin on the technical and energy indicators of the system of traction unregulated and regulated power supply

Innotrans ◽  
2020 ◽  
pp. 51-55
Author(s):  
Irina A. Baeva ◽  
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Electric Energy ◽  
Voltage Control ◽  
Supply System ◽  
Electric Locomotive ◽  
Voltage Level ◽  
Traction Power Supply System ◽  
Traction Power Supply ◽  
Traction Power

The article considers the effect of reducing the time of train-to-train margin on the specific consumption of electric energy and the voltage level on the currentcollecting gear of an electric locomotive. Simulation of the operation of the DC 3.0 kV traction power supply system is carried out in the KORTES software package. The section of the Sverdlovsk railway with an operating system of contactless automatic voltage control was taken for the study. The article defines the rational time of the train-to-train margin for an unregulated and regulated system of traction power supply. The energy efficiency of the system of contactless automatic voltage control was evaluated.

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