本文選題：表面-內(nèi)置式永磁同步電機(jī)　切入點(diǎn)：等效磁路法　出處：《河南理工大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：傳統(tǒng)的永磁同步電機(jī)一般分為表面式永磁同步電機(jī)和內(nèi)置式永磁同步電機(jī)。前者相對(duì)于后者而言,弱磁調(diào)速范圍小、功率密度低,但具有動(dòng)態(tài)響應(yīng)快、轉(zhuǎn)矩脈動(dòng)小的特點(diǎn),比較適合用于伺服驅(qū)動(dòng);而后者在永磁轉(zhuǎn)矩的基礎(chǔ)上疊加了磁阻轉(zhuǎn)矩,磁阻轉(zhuǎn)矩的存在有益于提高電機(jī)的過(guò)載能力和功率密度,易于弱磁調(diào)速,但轉(zhuǎn)矩脈動(dòng)大,漏磁凸出,需要設(shè)計(jì)隔磁橋,機(jī)械強(qiáng)度稍差。結(jié)合以上兩種永磁同步電機(jī)的優(yōu)點(diǎn),將兩者結(jié)合,提出一種新型表面-內(nèi)置式混合轉(zhuǎn)子的永磁同步電機(jī),本文對(duì)這種新型電機(jī)進(jìn)行優(yōu)化設(shè)計(jì)。本文結(jié)合典型永磁轉(zhuǎn)子結(jié)構(gòu)特點(diǎn),提出了新型表面-內(nèi)置式混合轉(zhuǎn)子的結(jié)構(gòu),初步設(shè)計(jì)電機(jī)的定轉(zhuǎn)子及氣隙等結(jié)構(gòu)尺寸,確定電機(jī)的定轉(zhuǎn)子結(jié)構(gòu)參數(shù);計(jì)算表面-內(nèi)置式永磁同步電機(jī)的電磁參數(shù),建立電機(jī)的等效磁路模型,對(duì)內(nèi)置永磁體體積和表面永磁體體積的比值、內(nèi)外兩部分永磁體的尺寸進(jìn)行優(yōu)化設(shè)計(jì),得到隨著不同參數(shù)變化時(shí)電機(jī)的效率、功率因數(shù)的曲線圖,對(duì)比不同參數(shù)下電機(jī)的轉(zhuǎn)矩波動(dòng)和力能指標(biāo),獲取電機(jī)永磁體的比值與尺寸的優(yōu)化結(jié)果;在電機(jī)參數(shù)和永磁體用量相等的情況下,采用有限元法建立表面式永磁同步電機(jī)、內(nèi)置式永磁同步電機(jī)和表面-內(nèi)置式永磁同步電機(jī)的仿真模型,對(duì)電機(jī)的永磁體形狀及尺寸進(jìn)行優(yōu)化設(shè)計(jì),計(jì)算電機(jī)的轉(zhuǎn)矩波動(dòng)和力能指標(biāo)等性能參數(shù);采用有限元法對(duì)表面-內(nèi)置轉(zhuǎn)子式永磁同步電機(jī)的內(nèi)外永磁體體積的比值和永磁體形狀進(jìn)行優(yōu)化,對(duì)比分析磁路法和有限元法的計(jì)算結(jié)果,驗(yàn)證了設(shè)計(jì)及優(yōu)化電機(jī)參數(shù)的合理性和此結(jié)構(gòu)電機(jī)性能的優(yōu)越性。
[Abstract]:The traditional permanent magnet synchronous motor is generally divided into surface permanent magnet synchronous motor and built-in permanent magnet synchronous motor. Compared with the latter, the former has the characteristics of low speed range of weak magnetic field and low power density, but has the characteristics of fast dynamic response and low torque ripple. The latter is suitable for servo drive, and the latter has superimposed magnetoresistive torque on the basis of permanent magnetic torque. The existence of magnetoresistive torque is beneficial to improve the overload ability and power density of the motor, and is easy to adjust speed with weak magnetic field, but the torque ripple is large, and the flux leakage is protruded. It is necessary to design the magnetic isolation bridge, and the mechanical strength is slightly lower. Combining the advantages of the two kinds of permanent magnet synchronous motors, a new type of surface-built-in hybrid rotor permanent magnet synchronous motor (PMSM) is proposed. This paper optimizes the design of this new type of motor. According to the structural characteristics of typical permanent magnet rotor, the structure of a new type of surface-built-in hybrid rotor is proposed, and the structure dimensions of stator, rotor and air gap of the motor are preliminarily designed. Determining the stator and rotor structure parameters of the motor, calculating the electromagnetic parameters of the surface-built-in permanent magnet synchronous motor, establishing the equivalent magnetic circuit model of the motor, the ratio of the volume of the built-in permanent magnet to the volume of the surface permanent magnet, The dimension of the permanent magnet is optimized, and the curves of motor efficiency and power factor are obtained with the change of different parameters, and the torque fluctuation and force energy index of the motor under different parameters are compared. The optimization results of the ratio and size of the permanent magnet are obtained, and the surface permanent magnet synchronous motor is established by the finite element method under the condition of the same parameters and the same amount of the permanent magnet. The simulation models of the built-in permanent magnet synchronous motor and the surface-built-in permanent magnet synchronous motor are used to optimize the shape and size of the permanent magnet and to calculate the torque ripple and the force and energy index of the motor. The ratio of inner and outer permanent magnet volume and the shape of permanent magnet are optimized by finite element method. The results of magnetic circuit method and finite element method are compared and analyzed. The rationality of the design and optimization of motor parameters and the superiority of this structure are verified.
【學(xué)位授予單位】：河南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM341

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本文編號(hào)：1573486