《永磁同步电动机英文翻译》由会员分享，可在线阅读，更多相关《永磁同步电动机英文翻译（12页珍藏版）》请在金锄头文库上搜索。
1、 . 英文原文Research on Voltage Space-vector Control System of Synchronous Motor Vector control of field oriented control, the basic idea is: through coordinate transformation control method for simulation of DC motor to control thepermanent magnet synchronous motor. Three-phase symmetrical windings inth
2、ree-phase AC can produce a rotating magnetic motive force, two phasesymmetrical windings into two symmetric alternating current can produce the same rotating magnet ometive force; therefore the three-phase symmetric winding can be replaced with two phase symmetrical windings equivalentindependent of
3、 each other, equivalent principle is the constant magnetomotive force produced before and after transformation, transformation and totalpower constant.Inoil field, the power factor was reduced and thereactive power consumption was increased because of the usage of the large number of asynchronous mo
4、tor, and resulting in a huge waste of energy, which reduced the integrated cost-effective of field. The permanent magnet synchronous motor possess all the advantagesofsynchronous motor and it has high efficiency and higher power factor. For the advantages of permanent magnet synchronous,it willbring
5、 good energy saving results if it is used in pumping unit. As a result,the study on permanent magnet synchronous motor control system is important.In this paper the theory of vector control system on PMSM is first deeply studied,and the idea of coordinate transformation is used to build the mathemat
6、ical model of PMSM. An in-depth theoretical analysis of voltage space vector control algorithm is done. Secondly,based on the mathematical model of permanent magnet synchronous motor and SVPWM theory,the model of PMSM vector control system isestablished by of Matlab/Simulink. The simulation result s
7、hows the possibility of using the control system.In the paper, the software and hardware of PMSM vector control system is designed core-basedTICompanys motor control DSP chip TMS320LF2407A. Hardware ncludes the main circuit,control circuit and its peripheral circuits;softwarecontains the main progra
8、m and SVPWM interrupt subroutine,itachieves the implementation of the dual closed-loop current. At last,the motor experiments are carried on under the laboratory,the experimental results verify the correctness of the hardware and control program.Permanent magnet synchronousmotorwith the advantages o
9、fsimple structure,high efficiency,wide speed range,widely used in machining,aerospace andelectric tractionfields,this paperintroduces the structure,control strategy of permanent magnet synchronousmotorand itsvector torque controlresearch present situationand direction.Based on space vector principle
10、,the three kind of coordinate systems as well as the transformation of them which usually used in motors speed control system are introduced,then,the mathematic models on different coordinate systems are derived,be based on that,the principle of traditional direct torque control system as well as th
11、e direct torque control system based on SVPWM are analyzed detailed,meanwhile,the realization process of SVPWM algorithm is derived.Finally,the simulation model of convientional DTC Control system are established in MATLAB/Simulink.Control of permanent magnet synchronous motormainly in the following
12、1.1 vector controlThe core idea ofvector control of three-phase current,voltage,the flux of the motor by coordinate transformation into the rotor flux oriented phase reference coordinate system, control idea according to DC motor, control motor torque.The advantages of the field oriented vector cont
13、rol is good torque response,precise speed control,zero speed can achieve full load.However,the vector control system needs to determine the rotor flux,to coordinate transformation,a large amount of calculation,but also consider the effect of changes in the rotor of the motor parameters,which makes t
14、he system more complex,this is the vector control deficiencies.1.2 direct torque controlIt is based on stator flux orientation,implementation of direct control of stator flux and torque.The control is based on the idea of amplitude real-time detection of motor torque and flux are given,and the torqu
15、e and flux linkage value comparison,the torque and flux adjusting the appropriate stator voltage space vector selection table switch calculated directly from an offline,power switch and control of inverter state.Direct torque control does not need the vector coordinate transformation complex,the mot
16、or model is simplified,no pulse width modulation signal generator,control has the advantages of simple structure,motor parameter changes,can obtain good dynamic performance.But there are also some shortcomings,such as the inverter switching frequency is not fixed,large torque ripple current to realize digital control requires high sampling frequency.1.3 direct torque control based on space vectormodulation(SVM-DTC)The SVM-DTC
