Energy management strategy is one of the main challenges in the development of fuel cell electric vehicles equipped with various energy storage systems. The energy management strategy should be able to provide the power demand of the vehicle in different driving conditions, minimize equivalent fuel consumption of fuel cell, …
The control strategy is an essential element in the improvement of electric motor energy efficiency through flux adaptation, according to the operating conditions. Therefore, the goal of this paper is to present an energy-efficient field-oriented control structure for squirrel-cage induction motors (IM), improving their energy efficiency and …
Input supply voltage. (Mandatory) Motor Efficiency as per nameplate – (if known). Rated power factor (if known). After entering the required data, click on the "Calculate" button to find out the required fuse rating, Circuit Breaker rating, contactor current rating, and overload setting. The appropriate selection of fuses, circuit ...
The full load current of a motor is the current drawn by it while operating at full load and rated voltage. It is a measured value and can also be calculated using formulae. The full load current may vary upon the applied voltage. Also, the rated full load current (FLC) is the one specified by the manufacturer while tested at ideal conditions.
A novel energy model of the battery-flywheel system is established. • The current distribution and torque allocation are realized by energy optimization. • The proposed double NNs-based control method improves the motor speed regulation. • …
The FESS has distinct advantages such as high energy storage, high efficiency, pollution-free, wide in application, absence of noise, long lifetime, easy maintenance and continuous working and so ...
Large-scale variable-speed pumped storage motor-generator adopts rotor winding AC excitation technology, which can adapt to the regulation requirements of wide speed range ...
Acknowledgements Improving Motor and Drive System Performance: A Sourcebook for Industry was developed for the U.S. Department of Energy''s (DOE) Industrial Technologies Program (ITP). This project is one in a series of sourcebooks on industri-al systems.
[10] Kenny BH, Santiago W. Filtering and Con trol of High Speed Motor Current in a Flywheel Energy Storage System. NASA/TM-2004-213343. Cleveland, OH, USA; NASA, 2004.
motor and elastic sha, respectively, 𝑚 and 𝐿 represent the output torque of the motor and main sh a, respective ly, and 𝑚 and 𝐿 s y m b o l i z et h ea n g u l a rv e l o c i t yo ft ...
In this paper, a 50 kW stator yokeless modular axial flux motor with strong overload capacity, wide operating speed range and high operating efficiency is designed …
Sensitivity Analysis Graphs. Rated Power: The rated power of the motor is given by the formula P = V I pf. Impact of Rated Voltage on Rated Power. V = [-934780.560 TO 935216.282] f (V)=V*I*pf. Impact of Power Factor on Rated Power. pf = [-934995.144 TO 934998.385] f (pf)=V*I*pf. Impact of Rated Current on Rated Power.
Square-wave currents are preferred because of the ideal trapezoidal shape of the back-EMF [14, 15].However, due to tolerances in the production of the motor, the real back-EMF waveform deviates from its ideal shape [16-18].Miller [] described the effect of skewing and slotting of the stator on the shape of the back-EMF.. Hanselman [] …
The new electromagnetic coupling energy-storage motor combines the double-rotor clutch structure and the mechanical energy-storage device. It reaches the …
Energy storage is the capture of energy produced at one time for use at a later time [1] to reduce imbalances between energy demand and energy production. A device that stores energy is generally called an accumulator or battery. Energy comes in multiple forms including radiation, chemical, gravitational potential, electrical potential ...
The flywheel is the main energy storage component in the flywheel energy storage system, and it can only achieve high energy storage density when rotating at high speeds. Choosing appropriate flywheel body materials and structural shapes can improve the storage capacity and reliability of the flywheel. At present, there are two …
Currently, the electrification of transport networks is one of the initiatives being performed to reduce greenhouse gas emissions. Despite the rapid advancement of power electronic systems for electrified transportation systems, their integration into the AC power grid generates a variety of quality issues in the electrical distribution system. Among the …
However, simply applying a VFD to a motor doesn''t improve its efficiency. An 89% efficient motor will, at best, be 89% efficient when operated with a VFD. In fact, system efficiency will ...
In this paper, the mathematical model of variable speed pumped storage motor is established by using the magnetic field positioning vector control technology, …
The evolution of energy storage devices for electric vehicles and hydrogen storage technologies in recent years is reported. ... For BEVs, the regenerative braking system unique to BEVs enables the electric motor …
In this section, the control methods are designed for the acceleration and braking process of the BLDCM, respectively, to achieve the control objective of using the SC for energy storage during braking …
It''s all about knowing the motor current rating to pick the correct motor. Choosing a motor is simple in concept: match its full load current to the job to avoid damage. We learn from the history of electric motors, like William Sturgeon''s first motor to Frank Julian Sprague''s advances.
One motor is specially designed as a high-velocity flywheel for reliable, fast-response energy storage—a function that will …
Specific technologies considered include pumped hydro energy storage (PHES), compressed air energy storage (CAES), liquid air energy storage (LAES), …
A parallel operation mode of pneumatic motor is proposed in this study to improve the power performance, energy conversion efficiency, and economy of compressed air energy storage system. First, the test bench …
In recent years, under the background of low carbonization and industrial intelligence, with the rise of new energy sources such as wind energy and solar energy, rare earth permanent magnets have begun to be widely used in generators of these new energy sources. From the perspective of green and sustainable development, permanent …
Highlights. •. A novel hybrid energy management system is intriduced enabling high torque output. •. An energy management strategy is proposed to ensure …
Fig. 17. Costs for energy storage systems. Based on different characteristics for each energy storage technology, and from above figures, it can be seen that for short-term energy storage (seconds to minutes), supercapacitor and flywheel technologies are ''a priori'' the best candidates for marine current systems.
Electrical motors can be brushed or brushless, Electrical motors can be single-phase or three phase. Electrical motors could be air-cooled or liquid-cooled. Electrical motors can be powered by direct …
This article presents the design of a motor/generator for a flywheel energy storage at household level. Three reference machines were compared by means of finite element analysis: a traditional iron-core surface permanent-magnet (SPM) synchronous machine, a synchronous reluctance machine (SynchRel), and an ironless SPM …
Hybrid energy storage systems (HESS) are an exciting emerging technology. Dubal et al. [ 172] emphasize the position of supercapacitors and pseudocapacitors as in a middle ground between batteries and traditional capacitors within Ragone plots. The mechanisms for storage in these systems have been optimized separately.
Round-trip efficiency is the ratio of energy charged to the battery to the energy discharged from the battery and is measured as a percentage. It can represent the battery system''s total AC-AC or DC-DC efficiency, including losses from self-discharge and other electrical losses. In addition to the above battery characteristics, BESS have other ...