本文選題：永磁電機(jī)　切入點(diǎn)：電磁場(chǎng)分布　出處：《浙江大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：本文對(duì)永磁電機(jī)振動(dòng)的主要來源一一電磁振動(dòng)進(jìn)行了研究,分別對(duì)永磁電機(jī)的電磁場(chǎng)、振動(dòng)特性和它們之間的耦合關(guān)系進(jìn)行了分析。 首先,本文推導(dǎo)了一個(gè)表貼式永磁電機(jī)在考慮轉(zhuǎn)子偏心和齒槽效應(yīng)情況下的電樞反應(yīng)磁場(chǎng)的解析模型。這個(gè)解析子域模型將永磁電機(jī)的磁場(chǎng)區(qū)域劃分為氣隙子域(包含剩磁為零的永磁體區(qū)域)、定子槽子域以及定子槽開口子域。先建立表貼式永磁電機(jī)的各個(gè)子域中的基本方程,解出含待定系數(shù)的方程通解。然后列寫各個(gè)子域的邊界條件和子域間的分界面條件,通過添加邊界條件確定通解中的待定系數(shù)。其中,為了考慮轉(zhuǎn)子偏心,使用一階攝動(dòng)法對(duì)各邊界條件進(jìn)行了修正。 其次,采用本文推導(dǎo)的表貼式永磁電機(jī)電樞反應(yīng)磁場(chǎng)的解析計(jì)算模型,結(jié)合前人推導(dǎo)的表貼式永磁電機(jī)空載磁場(chǎng)的解析計(jì)算模型,分別對(duì)4極24槽和8極12槽這兩種不同極槽配合的永磁電機(jī)在空載和負(fù)載情況下的電磁力波進(jìn)行了分析,得到了電磁力波的時(shí)間諧波分量和空間諧波分量。 最后,提出了永磁電機(jī)磁固耦合分析的兩種分析方法。 先介紹了磁固弱耦合分析方法：首先,使用Simulink軟件來仿真電機(jī)的驅(qū)動(dòng)電路,得到電機(jī)電磁場(chǎng)的激勵(lì),再使用JMAG軟件計(jì)算電機(jī)的電磁場(chǎng),將Simulink軟件和JMAG軟件結(jié)合起來,進(jìn)行場(chǎng)路耦合仿真,計(jì)算了由控制電路激勵(lì)的永磁電機(jī)的電磁場(chǎng)和電磁力,然后在JMAG中將電磁力加載到電機(jī)的三維結(jié)構(gòu)模型上,進(jìn)行永磁電機(jī)的振動(dòng)分析。本文以一個(gè)8極48槽的內(nèi)置式永磁電機(jī)為例對(duì)永磁電機(jī)的磁固弱耦合方法進(jìn)行了說明。 然后,介紹了磁固強(qiáng)耦合分析。這種方法可以考慮電機(jī)的電磁場(chǎng)與電機(jī)振動(dòng)之間的相互作用,是一種雙向耦合,可以得到更加準(zhǔn)確的結(jié)果。在本文的方案中,電磁場(chǎng)采用上文提到的完整的表貼式永磁電機(jī)電磁場(chǎng)解析子域模型,通過MATLAB軟件編程進(jìn)行計(jì)算；永磁電機(jī)的振動(dòng)計(jì)算,是將MATLAB計(jì)算得到的電磁力加載到ANSYS軟件中建立的三維結(jié)構(gòu)模型上,用有限元方法進(jìn)行；通過ANSYS的APDL語(yǔ)言編程來實(shí)現(xiàn)電磁場(chǎng)模型和振動(dòng)模型的調(diào)用計(jì)算以及MATLAB軟件和ANSYS軟件數(shù)據(jù)接口的建立,最終實(shí)現(xiàn)永磁電機(jī)的磁固強(qiáng)耦合振動(dòng)分析。本文以4極48槽和8極12槽這兩個(gè)永磁電機(jī)為例,對(duì)永磁電機(jī)的磁固強(qiáng)耦合分析方法進(jìn)行了說明,耦合仿真得到的結(jié)果與理論結(jié)果是符合的。
[Abstract]:In this paper, the electromagnetic vibration, the main source of the permanent magnet motor vibration, is studied. The electromagnetic field, the vibration characteristics and the coupling relationship between the electromagnetic field and the vibration characteristic of the permanent magnet motor are analyzed respectively. First, In this paper, an analytical model of armature reaction magnetic field of permanent magnet motor with rotor eccentricity and tooth slot effect is derived. This analytical subdomain model divides the magnetic field of permanent magnet motor into air gap subdomain (including air gap subdomain). The permanent magnet region with zero remanence, the stator slot subdomain and the stator slot open subdomain. First, the basic equations of each subdomain of the surface permanent magnet motor are established. The general solution of the equation with undetermined coefficients is obtained. Then the boundary conditions of each subdomain and the interface conditions between the subdomains are listed. The undetermined coefficients in the general solution are determined by adding boundary conditions. In order to consider the rotor eccentricity, The first order perturbation method is used to modify the boundary conditions. Secondly, using the analytical calculation model of the armature reaction magnetic field of the surface permanent magnet motor derived in this paper, and combining with the analytical calculation model of the no-load magnetic field of the surface permanent magnet motor derived by the predecessors, The electromagnetic force wave of permanent magnet motor with 4 pole 24 slot and 8 pole 12 slot are analyzed under the condition of no load and load respectively. The time harmonic and space harmonic components of the electromagnetic force wave are obtained. Finally, two analysis methods for magnetic-solid coupling analysis of permanent magnet motor are proposed. The analysis method of magneto-solid weak coupling is introduced. Firstly, the driving circuit of motor is simulated with Simulink software, and the excitation of electromagnetic field of motor is obtained, then the electromagnetic field of motor is calculated by using JMAG software, and the Simulink software and JMAG software are combined together. The electromagnetic field and the electromagnetic force of the permanent magnet motor excited by the control circuit are calculated by the field-circuit coupling simulation. Then the electromagnetic force is loaded into the three-dimensional structure model of the motor in JMAG. In this paper, a built-in permanent magnet motor with 8 poles and 48 slots is taken as an example to explain the magnetic-solid weak coupling method of the permanent magnet motor. Then, the magnetic-solid coupling analysis is introduced. This method can consider the interaction between the electromagnetic field of the motor and the vibration of the motor. It is a two-way coupling and can obtain more accurate results. The electromagnetic field is calculated by using the complete electromagnetic field analysis subdomain model of the surface permanent magnet motor mentioned above, and the calculation of the vibration of the permanent magnet motor is carried out by MATLAB software. The electromagnetic force calculated by MATLAB is loaded into the three-dimensional structural model established by ANSYS software, and the finite element method is used. Through APDL language programming of ANSYS, the transfer calculation of electromagnetic field model and vibration model and the establishment of data interface between MATLAB software and ANSYS software are realized. Finally, the magnetic-solid coupling vibration analysis of permanent magnet motor is realized. Taking the four pole 48 slot and eight pole 12 slot permanent magnet motor as examples, the magnetic-solid intensity coupling analysis method of the permanent magnet motor is explained in this paper. The results obtained by coupling simulation are in agreement with the theoretical results.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM351

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