Reducing power

The main contribution of this paper is to show a new AC/DC converter based on the rearrangement of the flyback converter. The proposed circuit only manages part of the energy and the rest is delivered directly from the source to the load. Therefore, with the new topology, the efficiency is increased, and the stress of the components is reduced. The rearrangement consist of the secondary of the flyback is placed in parallel with the load, and this arrangement is connected in series with the primary side and the rectified voltage source.

16p 63696369 20-06-2024 2 1   Download

This article deals with ballooncopters that have a special solution to assemble a multicopter with the balloon and payload as a scheme of two seriesly hung pendulums. The assembly scheme many times reduces the necessary power of the rotors when needed to tilt the thrust vector. This new assembly scheme requires balance and stability considerations when flying in windy conditions.

11p dathienlang1012 03-05-2024 3 0   Download

Flame retardants (FRs) play an important role as additives which is applied in a wide range of products because they can inhibit ignition to delay the spread of fire. By adding fly ash (a waste of thermal power plants), we have developed an epoxy resin material with good flame retardant properties. Besides, using the fly ash can reduce the consumption of current flame retardants (organic halogen compounds) and thus meet the environmental safety of flame retardant epoxy resin.

12p dianmotminh02 03-05-2024 3 1   Download

Excessive unbalance of the DC capacitor voltages of the inverter can cause overvoltages on power components and capacitors, causing unintended low-order harmonics on the load side such as second harmonics, 3rd, 4th, 5th,..., causing direct harm to the motor load, reducing the controllability of the reverse voltage and filter compensating current for the active filter circuit, affect to the performance of electric vehicles (EVs).

12p viohoyo 25-04-2024 2 2   Download

Supply chain management played a critical role in the electric power industrial chain optimization. The paper notes that in order to increase transparency and efficiency of settlements for electric energy, the introduction of intelligent metering systems is necessary. In order to achieve efficiency, transparency, data security and reduce transaction costs abroad, blockchain technologies that have both positive and negative characteristics have begun to be actively introduced.

6p longtimenosee04 06-03-2024 8 0   Download

Ebook "Photosystem I - The light-driven plastocyanin: Ferredoxin oxidoreductase" is a book integrating biochemistry, biophysics and molecular biology of this photosystem that provides the necessary reducing power for carbon fixation in plants, algae and cyanobacteria.

743p tachieuhoa 28-01-2024 2 2   Download

The integration of Electric Power Steering (EPS) in automobiles is crucial to reduce the steering effort for drivers while ensuring optimal steering performance to aid in vehicle control. The EPS system mandates a minimum 2Nm torque input from the driver to initiate steering wheel movement in all conditions.

5p viplato 02-01-2024 5 3   Download

This paper proposes an automatic voltage regulator (AVR) based on series voltage compensation mechanism by AC chopper. The proposed AVR consists of a pulse-width-modulated (PWM) AC chopper and a transformer for series voltage compensation. The AC chopper circuit provides direct AC power without the need for an energy storage element, thus reducing the size and cost of the AVR.

4p vimarillynhewson 02-01-2024 6 3   Download

Nowadays, Totem-pole PFC power factor correction converters are widely used in many fields, notably in electric vehicle charging stations because of their ability to transmit power in bidirectional. The principle of this converter is similar to the traditional Boost PFC topology, which does not include a bridge rectifier, so the performance is significantly improved.

10p vimichaelfaraday 28-12-2023 7 5   Download

To investigate the influence of the banana ripening stage on the change in the content of bioactive components and their bioactivities, ripening stages of porcelain banana peels were screened for the total phenolic content (TPC) and antioxidant activities using three methods, including DPPH scavenging assay, ferric reducing/antioxidant power (FRAP) assay, and inhibition of polyphenol oxidase activity (PPO assay).

9p vimichaelfaraday 28-12-2023 11 3   Download

The application of autonomous mobile robots (AMRs) has gradually become crucial in smart factories due to the advantages of improving production efficiency and reducing labour costs. Motion planning has been a key part of AMR control development. This paper presents motion planning and position tracking control systems of an omnidirectional wheel AMR powered by a hybrid fuel cell and battery power source.

8p vimichaelfaraday 28-12-2023 7 6   Download

In this paper, a topology incorporating the DC-link type quasi-switched boost network with the traditional three-level neutral point clamped inverter is presented. The third harmonic injection method is proposed to provide some benefits such as: enhancing the modulation index or improving the voltage gain.

8p vijeff 01-12-2023 6 3   Download

In this paper, the control design for the grid-connected converter used as a part of the wind turbine generator is discussed. First, the three-phase T-type multilevel converter, which exhibits several advantages such as low total harmonic distortion, reduced voltage stress, and switching loss, is employed for the power stage. Second, finite control set model predictive control (FCS-MPC) is adopted to achieve a multi-objective optimization solution for the inner grid-connected current control loop.

8p vibranson 30-11-2023 5 5   Download

In this study, the algorithm was applied to a model of an unstable electrical system with a degree of 66 and reduced to degrees 8 and 15. Simulation results using Matlab showed that the HBT method was successful in reducing the order of the system and improved simulation time. The reduced-order system of degrees 8 or 15 can be used in place of the original system in applications in the time or frequency domain during analysis, design, simulation or implementation of electrical networks.

6p giangnhanly 02-10-2023 4 3   Download

Continued part 1, part 2 of ebook "Lean manufacturing that works: Powerful tools for dramatically reducing waste and maximizing profits" provides readers with contents including: doing a baseline; lean-engineering analysis; seeking balance; the 5S system; setup reduction; total productive maintenance (TPM); the why - the psychology of lean;...

223p hanlinhchi 29-08-2023 6 5   Download

Part 1 of ebook "Lean manufacturing that works: Powerful tools for dramatically reducing waste and maximizing profits" provides readers with contents including: customer satisfaction; cost and profit; metrics; cash flow; inventory and carrying cost; velocity, throughput, and lead time; batch and queue vs. lean flow; waste; value added, non-value-added, required non-value-added;...

81p hanlinhchi 29-08-2023 6 4   Download

Part 1 of ebook "Basic engineering mathematics (Fifth edition)" has presents the following content: basic arithmetic; using a calculator; ratio and proportion; powers, roots and laws of indices; units, prefixes and engineering notation; basic algebra; further algebra; solving simple equations; transposing formulae; solving simultaneous equations; solving quadratic equations; exponential functions; straight line graphs; graphs reducing non-linear laws to linear form; graphical solution of equations; angles and triangles;...

207p dieptieuung 20-07-2023 6 3   Download

Continued part 1, part 2 of ebook "Global logistics management" presents the following content: arc selection and routing for restoration of network connectivity after a disaster; feasibility study of shuttle services to reduce bus congestion in downtown izmir; relocation of the power transmission and distribution division of a multinational electronics and electrical engineering company; location problems with demand regions; a new approach for synchronizing production and distribution scheduling - case study;...

128p dieptieuung 14-07-2023 6 3   Download

This paper demonstrates a simple sidelobe control or interference suppression approach that is appropriate for CB in wireless sensor networks. This approach aims to reduce interferences at unwanted BSs/APs while maintaining the main lobe steering the desired BSs/APs.

5p vifalcon 16-05-2023 11 4   Download

Biogas energy is considered a renewable energy source. The efficient usage of biogas resources can help reduce greenhouse gas emission, especially methane, generate electricity to power farms’ loads, and decrease load demand on grids.

6p vifalcon 16-05-2023 8 4   Download