| 1. | However , the disturbance of the linear motor ' s end effect is the main factor of affecting the machining performance
然而，由直线电机端部效应引起的扰动，也成为影响着机床主轴系统性能的主要因素。 |
| 2. | The electromagnetic finite element software is programmed using the ansys and the thrust is calculated that the linear motor ' s end effect brings
编写基于ansys的电磁场有限元分析程序，计算主要由直线电机端部效应引起的波动推力。 |
| 3. | In the vector control , both the no - load thrust and the thrust with the different current are calculated , and the end effect influenced by the current magnitude is analyzed
在矢量控制运行下，分别计算了电机在空载时和在通以不同电流时的由端部效应引起的波动推力，并且分析了电流大小对端部效应的影响。 |
| 4. | The low - frequency slot harmonic modulation is used to weaken the end effect or decrease the wave of the thrust , and the many projects are designed or the better project is selected
采用齿谐波低频调制的设计方法，来削弱直线电机固有的端部效应，使推力的波动减小，并进行了多方案计算，得出比较好的设计方案。 |
| 5. | In conclusion , when the current of the winding is increased , the tendency of the end effect - thrust is unchangeable , the no - load end effect is the main part of the pm linear motor ' s end effect
从以上的分析和计算得出，随绕组电流幅值的增加，端部效应影响电机推力的波动趋势不变，空载端部效应是永磁直线电机端部效应的主要部分。 |
| 6. | So an reasonable inductance modify coefficient is found . according to the magnetic field distribution , some ameliorations are made , then a reasonable and more accurate analytic formula concerned the effect of end zone is presented
根据磁场计算结果，对非线性磁参数法中的一些公式提出了合理的改进，从而找到一种考虑端部效应、较准确计算最小电感的解析算法。 |
| 7. | The more poles mode , the unequal pole width mode ; the low - frequency slot harmonic modulation mode and the mode of changing end magnetic conductance are presented , and these designing method can efficiently weaken the end effect and decrease the wave of the thrust
提出的采用多极电机方式；初级与次级极距不等的方式；齿谐波低频调制方式和改变电机两端部磁导的方式等电机的设计原则和方法，都可有效地削弱端部效应，减小推力的波动。 |
| 8. | For verify the test theory , we used the numerical method the simulated the instrument heat exchanging . thus we checked the axial heat disturbing how to influence the test results , and checked the test time ’ s influence the test result , finding the time limit to avoid the natural convection influence
运用数值方法模拟了测试仪器的实际传热过程,结果表明热丝端部的轴向热流在短时间内对测试的结果影响较小,采用双热丝可以有效避免端部效应。 |
| 9. | Some problems from the principal stress axis rotation experiment with hollow cylinder apparatus are analyzed in detail herein ; which consists of three aspects , such as the preparation of the hollow cylinder sample and the acquisition of the isotropic one ; the estimation and elimination of the size effect and the end effect in the experiment ; and the membrane penetration effect on both the drained and the undrained tests results , etc
摘要详细分析了采用空心圆柱仪进行主应力轴旋转试验遇到的若干问题，主要包括三个方面：空心圆柱试样制备及各向同性试样的获得；试验中尺寸效应、端部效应的考虑与消除；空心试样膜嵌入效应对排水、不排水试验结果的影响等。 |
| 10. | Besides , the motor control system based on the digital signal processor ( dsp ) is analyzed . the hardware circuit about the dsp system is designed . the dsp control software is programmed on the field magnetic orientated control and the space vector pulse width modulation ( svpwm ) , that establishes the ' basis for implementing the modern control principle
然后，又对基于数字信号处理器( dsp )的电机控制系统进行了分析，设计了dsp系统的硬件电路，并编写和调试了空间磁场定向控制和空间矢量脉宽调制( svpwm )的dsp系统的软件，为直线电机现代控制策略的具体实现奠定了基础，并提出了对端部效应进行补偿的控制方法。 |
