The Pump Hydraulic Load Effect Determination on the Parameters of an Frequency-Controlled Asynchronous Electric Drive

Lysenko, O. A.; Simakov, A. V.

doi:10.1109/dynamics47113.2019.8944719

Cited by 7 publications

(5 citation statements)

References 8 publications

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“…In this research, the non-road mobile machine used as an example is a log loader, and its required power cycles are measured to analyse energy saving potential. The benefits of hybridisation, in general, are system efficiency increase, lower fuel consumption, lower pollution, and energysaving by regeneration [2][3][4]. Earlier studies have proven that in some log-loader cycles energy savings can be as high as 50% [5].…”

Section: Introductionmentioning

confidence: 99%

Two Cooling Approaches of an Electrohydraulic Energy Converter For Non-Road Mobile Machinery

Lindh

Tiainen

Grönman

et al. 2023

IEEE Trans. on Ind. Applicat.

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The energy efficiency of non-road mobile machinery can be improved by using e.g. an electric drive system as a servo controller of a hydraulic machine to get an efficient electrohydraulic (EH) converter. However, the cooling of EH devices require more understanding and new innovations. This work presents a design of a 7-kW integrated EH machine and studies its electric motor heat transfer phenomena both experimentally and numerically. Further, to better match the torque and speed performances of the permanent magnet synchronous motor (PMSM) and the hydraulic machine a planetary step-down gear is utilized to triple the output torque of the PMSM. The integrated motor and gear system is then connected to a bent axis piston hydraulic machine, which is capable of operating both as a motor and a pump. Two different electric motor cooling approaches are investigated. The first cooling approach is to use some hydraulic oil inside the motor-gear chamber to let it flow freely as a result of the rotor rotation and move the losses to the surface of the converter cover, which is equipped with some air cooling fins. In the second approach, the oil flows through the converter and removes the losses more effectively. Motor losses and thermal behaviour are studied within these two cooling approaches. Computational fluid dynamic (CFD) simulations are performed to find how the coolant is distributed inside the machine and how heat is distributed in the device.

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Section: Introductionmentioning

confidence: 99%

Two Cooling Approaches of an Electrohydraulic Energy Converter For Non-Road Mobile Machinery

Lindh

Tiainen

Grönman

et al. 2023

IEEE Trans. on Ind. Applicat.

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“…Itoh [19] compared between V/f control and position-sensorless vector control method, showed that V/f control is the best choice for simple variable-speed applications such as fan or pumps and is especially effective in the high-speed range. Lysenko [20] took constant voltage to frequency ratio control into account and simulated a real three-phase inverter-induction motor-centrifugal pump. Han [21] established an electromechanical coupling model in openloop voltage to frequency control mode and calculated and analyzed the effect of factors such as multi-stage inverters on fatigue life.…”

Section: Introductionmentioning

confidence: 99%

“…In the dynamic characteristics analysis method, most scholars [12][13][14][15][16][17][18][19][20][21][22] mainly focus on the dynamics of electromechanical inter-coupling of systems in the steady state, and some scholars also study the dynamic characteristics of electromechanics under transient conditions for some electrical systems with transients [11] or sudden changes in mechanical loads [10,23]. However, for differential speed regulation systems, it is very basic and common for the variable frequency drive to produce smooth changes in the mechanical load.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is necessary to carry out transient analysis of the start-up and speed regulation stages in addition to the study of the steady state characteristics of the differential speed regulation system. Some of the above-mentioned scholars [10][11][12][13][14][15][16] have studied the dynamic characteristics of motor-gear system coupling, while others [17][18][19][20][21][22] have analyzed the dynamic characteristics of inverter-motor coupling or invertermotor-pump coupling. These studies only consider part of the electromechanical drive system and do not provide a complete reflection of the overall coupling dynamic characteristics of the electromechanical coupling system.…”

Section: Introductionmentioning

confidence: 99%

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Electromechanical Coupling Dynamic Characteristics of Differential Speed Regulation System Considering Inverter Harmonics Under Variable Operating Conditions

et al. 2022

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The differential speed regulation system driven by inverters, motors and differential gear trains is a complex electromechanical system that achieves speed regulation and energy savings efficiently and economically. In this paper, the complete drive trains dynamic model of the differential speed regulation system with the inverter power supply-motor-differential gearbox-load is established. The inverter power supply considers constant voltage to frequency ratio control, sinusoidal pulse width modulation and inverter, the motors are modeled based on the equivalent circuit method, and the differential gear trains consider a lateral-torsional model with time-varying meshing stiffness and damping. The dynamic properties of the system are analyzed and compared with the variable frequency drive model considering inverter power supply and the direct drive model using ideal power supply under variable operation conditions. The results show that the variable frequency drive model varies more smoothly in the time domain and contains additional harmonic components in the frequency domain resulting from the coupling of the inverter triangle carrier frequency to the fundamental frequency of the power supply than the direct drive model. It also shows that the variable frequency drive model is a more realistic and rational model than the direct drive model. The complex coupling relationship can be seen in the inverter power supply-motor-differential gearbox-load system, where both inverter harmonics and mechanical meshing force harmonics are found in the dynamic response of the motor's electromagnetic torque, rotor speed; the inverter harmonics are also reflected in the mechanical meshing force harmonics.

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“…A review of existing works in the field of the simulation of the first rise sections and similar objects [16,[34][35][36][37][38][39] showed the absence of models that provide a complete analysis of the interconnections of elements of different physical nature in the complex "Electric network-Electric drive-Pump-Pipeline-Reservoir-Control system". Additionally, insufficient attention is paid to assessing the dynamic effect of the hydraulic and geometric parameters of the pipeline on the thermal properties of water in the process of automatic control.…”

Section: Introductionmentioning

confidence: 99%

Simulation Modeling of First Rise Section of Water Supply System with Installed Complex of Automatic Pump Performance Control

Palkin

Suvorov

2021

Machines

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The article considers the important problem of technical and economic optimization of the operating modes of the first rise section of water supply systems. At the same time, the task is to minimize the costs associated with the excessive operation of pumps, while providing the protection of the pipeline from freezing in harsh natural operating conditions. To solve this problem, a computer simulation model was developed for the first rise section, equipped with a pump performance control system. The main differences of the developed model are: integrated approach to the analysis of parameters of various physical nature, assessment of the object economic indicators, possibility of simulating non-standard control algorithms. Preliminary studies of the model have shown the possibility and feasibility of its application for calculating the optimal parameters and operating modes of the object under consideration. Based on the simulation results, it was revealed that to calculate the control action by level, it is advisable to use the PID law, for temperature—PD law, for flow rate—PI law. To calculate the main control action, it is proposed to simultaneously calculate the actions in terms of level and temperature, followed by bringing the larger of them to the value of the setpoint for the flow rate maintained by the flow controller. The studies of the proposed management concept for the first rise section have shown its high technical and economic efficiency. In particular, the savings in electricity consumption are estimated at about 55.2% while providing pipeline frost protection.

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The Pump Hydraulic Load Effect Determination on the Parameters of an Frequency-Controlled Asynchronous Electric Drive

Cited by 7 publications

References 8 publications

Two Cooling Approaches of an Electrohydraulic Energy Converter For Non-Road Mobile Machinery

Two Cooling Approaches of an Electrohydraulic Energy Converter For Non-Road Mobile Machinery

Electromechanical Coupling Dynamic Characteristics of Differential Speed Regulation System Considering Inverter Harmonics Under Variable Operating Conditions

Simulation Modeling of First Rise Section of Water Supply System with Installed Complex of Automatic Pump Performance Control

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