Yangyang Zhao

Temperature field and heat load research for main propellant direct drive Permanent Magnet Motor of Unmanned Aerial Vehicle

According to the fluid mechanics and heat transfer theory, taking the main propellant direct drive Permanent Magnet Motor (PMM) of Unmanned Aerial Vehicle (UAV) as the object of study, physical and mathematical models of coupling solution to a 3D fluid flow and heat transfer are established under the strong cooling condition for the structure characteristics and ventilation performance of UAV main drive PMM. Using finite element method for coupling calculation of three-dimensional fluid field and temperature field, the flow performance of internal fluid in motor, the characteristics of heat transfer performance and the distribution of temperature rise of motor and winding are analyzed, and the problem of thermal load is studied in depth, and the results are compared with the test, which provide a theoretical basis for the temperature field research and selection on heat load of main propellant PMM of UAV.

The Anti-control of UAV Main-driven System of PMSM Based on Chaos

The motor control has progressed into more advanced PLC and MCU control system from the original relay control system. Currently, the thought of chaos control and chaos anti-control is budding. New information technology on the control of the motor, based on chaotic neural network, has higher stability, accuracy and reliability. While chaos control and anti-control can be used in pattern classification, information encryption, signal detection, image processing, optimization calculation, the application of chaos control and anti-control in the UAV has great advantages. The research for PMSM system chaos anti-control of UAV main-driven gradually popular, which will be a revolution of the UAV main-driven control.

Vibration Characteristic of Multi-Stage Linear Motor Pumping Unit

The vibration reason of the linear electric motor is analyzed for multi-stage linear pumping unit. A different order number expression of natural frequencies under wave action is given. Respectively, the finite element simulation software is used for linear motor and linear pumping machine of vibration characteristic analysis. Vibration quality participate coefficients of linear permanent magnet motor are provided under different frequency. Through the analysis, it shows that optimized motor structure can restrain vibration, so as to ensure the stability of multi-sections of straight beam pumping unit.

Temperature Field Analysis of High Efficiency Linear Pumping Unit

The generation of heat source of high efficiency linear pumping unit was analyzed. The calculation method of motor loss and heat dissipation coefficient was given. The finite element analysis software was used to simulate and analyze the temperature field of the linear pumping unit in the phase of constant motion and the starting and reversing phase. According to the analysis, it was concluded that the reasonable optimization of linear motor cooling structure can ensure the good temperature characteristics.

Multi-Physics Coupling Analysis of Efficient Pumping Unit Linear Motor

Taking efficient pumping-unit linear motor as the research object in this paper, SOLIDWORK has been used to establish 3D model and analyze multi-physics of the efficient pumping-unit linear motor, including vibration mode, stress analysis and the analysis of temperature field. Through the simulation analysis, getting efficient pumping unit linear motor of the top five order vibration frequency, pressure distribution and temperature distribution, theoretical references are provided for the analysis of the efficient pumping-unit linear motor. The innovation of the article is in coupling analysis of multi-physics.

Strength Analysis of Efficient Linear Pumping Unit

In order to avoid the pumping unit damaging caused by strength failure in actual work, this paper builds reliability calculation formula and reliability point estimation model based on SSI. The finite element simulation software is used in this paper to simulate the internal stress of the pumping unit and the strength of oil-conveying pipe. This paper also analysis the oil pressure distribution of the pumping unit internal and the oil-conveying pipe and the deformation degree of the pipeline in normal work. The research results confirm that the stress is much weaker than the material strength, which indicates that the design of the strength is reasonable.

Structure Design and Analysis of Multi-Stage High Efficiency Linear Pumping Unit

A multi-section high efficient pumping unit was designed. The pumping unit has a multi-stage structure including forcer part of the use of linear motor and four-stage linear motor extract oil one after another. Consumption can be reduced and the operating efficiency of the machine can be improved. Each component of high efficiency linear pumping unit is introduced. Using power inverter to control pumping unit without complicated equipment and contact limit controller, pumping stroke adjustment can be realized. The control system adopts the vector control, high control precision and anti-interference ability.

Research on optimization design of UAV main propulsion motor based on Particle Swarm Optimization algorithm

UAV main propulsion motor is required the small mass and Colliers energy density (torque density and power density), so it needs more optimal motor to achieve the purpose. The constraint condition of the main propulsion motor is a complex nonlinear continuous function, and the general Particle Swarm Optimization (PSO) algorithm is used to solve the problem when the multiple objectives are converted into different weights, and then converted to a single target for processing. And the weight of different targets is given based on experience, but the weight of the new motor is often difficult to determine the weight. In this paper, a new particle swarm optimization algorithm is proposed, which can optimize the two sub populations, and then exchange the optimal solutions of the two subgroups. Experiments show that this algorithm is applicable to main propulsion motor quality and efficiency of optimization, and the optimization results and general algorithm are compared. It is proved that the algorithm has high accuracy and fast convergence speed and is suitable for solving the similar problems.

Research on multi-section effective linear motor pumping unit

Firstly, the research status of Oil Field Mechanical Pumping was introduced, showing the weakness of beam-pumping unit. An original multistage assembled line motor was present in this literature. Secondly, the operating principle of assembled line motor was introduced. The electrical parameter of the line motor was designed, making the rated thrust be 18595Nm, while the control system was finished at that time. By using the finite element method (FEM), oil pressure, electromagnetic field and temperature field were simulated and analyzed. In this paper, the simulation and analysis will provide certain reference for the research of linear pump, especially for multi-section linear motor pumping unit.

Main Insulation Temperature Field for Direct-Drive Permanent Magnet Motor of Electric Vehicle

According to the fluid mechanics and heat transfer theory, taking the main propellant direct-drive permanent magnet motor (PMM) of electric vehicle (EV) as the object of study, physical and mathematical models of coupling solution to a 3D fluid flow and heat transfer are established under the strong cooling condition for the structure characteristics and ventilation performance of EV main drive PMM. Using finite element method for coupling calculation of three-dimensional fluid field and temperature field, the flow performance of internal fluid in motor, the characteristics of heat transfer performance, and the distribution of insulation temperature rise of motor and winding are analyzed, and the results are compared with the test, which provide a theoretical basis for the temperature field research and selection on heat load of main propellant PMM of EV.