A traction electric drive for electric cars

Григорьев, М. А.; Naumovich, N. I.; Belousov, E. V.

doi:10.3103/s1068371215120111

Cited by 65 publications

(4 citation statements)

References 5 publications

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“…The process that requires the supply and rotates the workpiece means a lack of metal in the rolls, so the rolling tool is made so that the bite is formed between the rollers in the initial (I) and ending (II) positions during rolling [8].…”

Section: Statement Of Energy Saving Problemmentioning

confidence: 99%

Energy efficiency improvement of electric drive of cold pilgering mill

Sychev

Savosteenko

Gryzlov

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Different ways to improve the energy efficiency of electric drives of cold pilgering mill are considered. Mathematical modeling methods represent studies according to which it is possible to evaluate quantitatively the energy savings. For example, cold pilgering mill 450 shows the mean square of the armature current of the main drive motor related to critical frequency of the speed loop. The possibility of energy saving by previous field weakening of the motor before the operating cycle of rolling is considered. The optimal energy saving points of supply and termination of the pulse are determined by the field weakening. The correlation of the parameters of the dynamic units and the change of the electric drive work schedule provides the greatest loss reduction in the main drive of the cold pilgering mill stand based on the conditions. Activities aimed at improving energy efficiency of electric drives of mills of this group are reviewed, which reduces the electric energy consumption for the cycle rolling by 20-25 %.

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Section: Statement Of Energy Saving Problemmentioning

confidence: 99%

Energy efficiency improvement of electric drive of cold pilgering mill

Sychev

Savosteenko

Gryzlov

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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“…A separate issue is the approval regulations for non-road and working machinery engines [ 14 , 15 ], where further restrictions are expected in the near future. All legislative actions, except for the reduction of toxic emissions of exhaust components, are aimed at reducing CO 2 emissions [ 16 , 17 ], making it increasingly attractive to use methane or petroleum-based gaseous fuels [ 18 , 19 , 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Model Evaluation of the Influence of the Plunger Stroke on Functional Parameters of the Low-Pressure Pulse Gas Solenoid Injector

Szpica

Kusznier

2021

Sensors

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The article presents a model-based evaluation of the impact of the plunger stroke on functional parameters of the low-pressure pulse gas solenoid injector. A reduced-order physics-based mathematical model was used to achieve this goal. The model was built on the basis of specified simplifications of the process, considering the forces that cause the plunger to move and the forces constituting resistance to its displacement. The implementation of a mathematical description in to the Matlab-Simulink environment allowed one to determine the characteristic values of operation of the Valtek Rail Type-30 injector, including plunger displacement courses. Calculations made with the assumption of the factory plunger stroke confirmed the validity of the model. The differences in opening and closing times were below 3% in comparison to the values given in the objects technical information. By assuming a specific plunger stroke, the functional relationships of opening and closing times were determined. The results showed a distortion of the force–response dependence for different plunger strokes. Results presented in the article can be used to support control-oriented modeling of systems incorporating pulsed gas dosing devices, such as combustion engines or gas turbines. More specifically, the proposed method can be used to pre-calibrate the delay time of the injector operation.

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“…A certain solution to this situation is use of fuels with reduced carbon content [12][13][14][15] or systems supporting combustion engines (hybrid drives) [16; 17]. Electric drives [18], pneumatic drives [19], or H 2 fuel [20; 21] are becoming increasingly popular.…”

Section: Introductionmentioning

confidence: 99%

Determination of low pressure gas injector valve flow factor

Szpica

2020

19th International Scientific Conference Engineering for Rural Development Proceedings

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During the time when exhaust toxicity effects have an important role in the means of transport, engines are very often converted to be supplied by alternative fuel. The most popular alternative fuels used in transport vehicle engines are liquefied petroleum gas and compressed natural gas. In both cases, the fuel dosage component is the low pressure gas injector. There are many design constructions for these injectors, i.e. plunger, plate or membrane. The most popular are plunger injectors. In the course of mathematical modelling of the combustion engine fuel supply system operation, it is necessity, among other things, to determine the flow parameters of components, mainly the values of flow factors. The article presents the results of plunger injector experimental flow tests at various opening levels. For this purpose, the original laboratory stand and flow meter were used. An original method for determining the cross-section flow area for a plunger valve has been proposed. The determined coefficient is universal and it is used in the case of plunger injectors. Tests at varying degrees of opening are static, because the flow is steady and the plunger is stationary. An attempt was made to validate the results of static tests under dynamic conditions. For this purpose, our own research method was used, consisting of emptying the tank with a pressure sensor mounted under dynamic injector operation. The results of measurements are flow pressure graphs. They reflect the cyclical operation of the injector. In the final stage experimental and model waveforms were compared (mean absolute percentage error did not exceed 0.5%). Theoretical values were calculated on the basis of a simplified flow model, taking into account the coefficient and field of free flow from static tests. As a result, the applicability of the parameters obtained from static tests for dynamic applications was assessed.

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A traction electric drive for electric cars

Cited by 65 publications

References 5 publications

Energy efficiency improvement of electric drive of cold pilgering mill

Energy efficiency improvement of electric drive of cold pilgering mill

Model Evaluation of the Influence of the Plunger Stroke on Functional Parameters of the Low-Pressure Pulse Gas Solenoid Injector

Determination of low pressure gas injector valve flow factor

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