電力牽引傳動(dòng)課程設(shè)計(jì)-三相異步電動(dòng)機(jī)調(diào)速系統(tǒng)設(shè)計(jì)(編輯修改稿)
2025-02-09 17:22 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 200。 % Example, set the next hit to be one second later. sys = t + sampleTime。 % end mdlGetTimeOfNextVarHit 四、Sfunction程序function [A,B,C,D,K,X0] = motor(par,ts,aux)%MOTOR ODE file representing the dynamics of a motor.%% [A,B,C,D,K,X0] = MOTOR(Tau,Ts,G)% returns the State Space matrices of the DCmotor with% timeconstant Tau (Tau = par) and known static gain G. The sample% time is Ts.%% This file returns continuoustime representation if input argument Ts% is zero. If Ts0, a discretetime representation is returned. To make% the IDGREY model that uses this file aware of this flexibility, set the% value of property to 39。cd39。. This flexibility is useful% for conversion between continuous and discrete domains required for% estimation and simulation.%% See also IDGREY, IDDEMO7. % L. Ljung% Copyright 19862011 The MathWorks, Inc.% $Revision: $ $Date: 2011/12/27 15:42:57 $ t = par(1)。G = aux(1)。 A = [0 1。0 1/t]。B = [0。G/t]。C = eye(2)。D = [0。0]。K = zeros(2)。X0 = [0。0]。if ts0 % Sample the model with sample time Ts s = expm([[A B]*ts。 zeros(1,3)])。 A = s(1:2,1:2)。 B = s(1:2,3)。end五、電機(jī)系統(tǒng)模型六、仿真過(guò)程及其結(jié)果（1）20HZ電流20HZ電流整體20HZ電壓設(shè)置20HZ轉(zhuǎn)速（2）50HZ電流50HZ電流整體50HZ轉(zhuǎn)速50HZ電壓設(shè)置六、總結(jié)本文討論了基于兩相靜止坐標(biāo)系下的三相異步交流電機(jī)在MATLAB/SIMULINK環(huán)境下的仿真，介紹了S一Function建模的方法，其特點(diǎn)是編程容易，模型直觀，沒(méi)有煩瑣的框圖。然后以轉(zhuǎn)動(dòng)慣量的大小變化對(duì)電機(jī)啟動(dòng)時(shí)的影響為例，進(jìn)行電機(jī)模型的仿真，從仿真結(jié)果可以看出所建模型符含實(shí)際異步電機(jī)的運(yùn)行特性，驗(yàn)證了設(shè)計(jì)模型的正確性，為進(jìn)一步基于DSP的矢量控制變頻調(diào)速系統(tǒng)的研究奠定基礎(chǔ)。參考文獻(xiàn)[1]陳建業(yè)，電力電子電路的計(jì)算機(jī)仿真，北京：清華大學(xué)出版社，2005[2]陳剛，軟開(kāi)關(guān)雙向DC/DC變換器的研究，浙江大學(xué)博士學(xué)位論文，2001[3]張國(guó)安，朱忠尼，新型推挽式移相式軟開(kāi)關(guān)拓?fù)溲芯浚姽ぜ夹g(shù)雜志，1998（1）[4]伊林林，軟開(kāi)關(guān)PWM 雙向D C / D C 變換器的研[5]百度g an employment tribunal claimEmployment tribunals sort out disagreements between employers and employees.You may need to make a claim to an employment tribunal if: you don39。t agree with the disciplinary action your employer has taken against you your employer dismisses you and you think that you have been dismissed unfairly.For more information about dismissal and unfair dismissal, seeDismissal.You can make a claim to an employment tribunal, even if you haven39。tappealedagainst the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal.Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept it.If you are worried about how the time limits apply to you, take advice from one of the organisations listed underFurther help.Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation.Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the organisations listed underFurther help.If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee
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