Motor design synchronous motor dynamic state characteristic simulation of naval aeronautical engineering institute Li Yansu Gavin according to the electromagnetic relation of synchronous generator and synchronous motor dynamic runtime, the characteristics of electromagnetic motor dynamic runtime change rule of mathematic model, and the features of the dynamic operation of synchronous motor simulation research.
In this paper, the synchronous motor optimization design provides a theoretical basis.
Thesaurus synchronous generator mathematical model for dynamic operation simulation for the assumption of the stator three phase windings symmetrical distribution ignore the hysteresis loss and eddy current losses excluding and the influence of the ferromagnetic saturation all winding resistance in the process of the motor running with constant speed remains constant damping winding with a transverse damping and a longitudinal axis damping windings instead.
Dynamic running process of synchronous generator is a common fault running state of synchronous motor, such as the armature short-circuit outlet end, is from the beginning of the short circuit instantaneous, motor in the transition process of sudden short circuit, short circuit instantaneous impact current is very big (maximum rated current instantaneous value can reach 10 to produce very big electromagnetic force inside the motor and the electromagnetic torque, braking torque and alternating torque of motor damage mechanical structure, and the process is determined by the parameters of the motor itself, so the motor dynamic operating characteristics, to optimize the motor design has the very vital significance.
Salient pole synchronous generator's structure, the structure and properties of salient pole synchronous generator is general, the conclusions and non-salient pole machine is easy to promote.
Based on the salient pole synchronous generator as the research object.
Simplify the structure of the graph is salient pole synchronous generator, with an exciting winding of a three-phase armature winding damping windings, and coordinate system have been marked in the picture, the motor voltage and current in the positive direction is according to the generator stator winding practice, forward current produce negative magnetic chain according to the motor rotor winding practice, forward current generates positive magnetic chain.
In the process of the motor running, especially the dynamic process, the internal magnetic field distribution and the changing rule of the induction electric potential is quite complex, figure of salient pole synchronous generator structure schematic diagram of salient pole synchronous generator mathematical model according to the electromagnetic synchronous generator structure and internal relations, as well as the dynamic runtime, electromagnetic relations can be synchronous motor in the ab system voltage equation of two J0 two excitation winding is one of the three phase stator winding and damping winding voltage less induced voltage of the winding machine technology in phase, for example a few at first only a few issue to fly?
Time figure exciting winding current waveform figure the changing rule of the exciting winding current conclusion a boat Xia Xing free time four control principle seeks in the 1 state) sequence diagrams transverse damping winding current waveform from the simulation results, the armature winding currents in three-phase short-circuit moments can be up to 16 times the rated current, then gradually incline to the steady-state value, excitation current of the initial value for the stable operation of excitation current is close to the current waveform of the simulation results are consistent with the experimental data.
This kind of method to establish the mathematical model of synchronous generator, clear logical conception, is a time-varying motor parameters, and are commonly used in engineering design of dq parameters, do not need to make any change, can be directly used in the numerical solution method.
And can be applied in non salient pole synchronous generator, and provide theoretical basis for optimal design of synchronous motor.
References Gao Jingde Zhang E levied by motor transition process of the basic theory and analysis method).
Science press, Chen Rui compiled.
Synchronous motor running water power press, the basic theory and the computer algorithm Wang Yudong editor electrical machinery (book1&book 2 zhejiang university press Zhang Zhichong proficient and Beijing university of aeronautics and astronautics press, the date of the first author in master li yan female lecturer built ro-ro food fresh scale grave tomb with the thicken porridge solution more python installed Mo play until the spell thicken stir in sauce mix solution will install spear reinforcement thicken built lai bright qing to Sally as fresh built to produce fresh outfit built spear as fresh YiHe gorgon euryale pipes of prostitutes outfit built RuZhu eventually wan wan fresh of fresh built welcome to Shanghai outstanding science and technology journals play a roll the motor technology of motor technology department of Shanghai institute of electrical technology is given priority to with motor manufacturing technology of technical periodicals of science and technology, the main coverage of domestic and foreign research achievements in the field of motor manufacturing, new technologies, new processes, new equipment, new materials research applications of existing motor design, technical exchanges, insulation project, four new pairs of leather, motor test, electric vehicle research, exchange of experience and industry trends and market information, etc.
