| 1. | Rack for chainless haulage system part 2 : type and size of rack support for chainless haulage system
无链牵引链轨第2部分：无链牵引轨座型式和尺寸 |
| 2. | Considering the system ' s wide speed range and ipm ' s switching frequency ' s top limit , the variable flux linkage locus structure control has been executed in the full speed adjusting range
考虑到系统调速范围宽和逆变器开关频率的限制，在全频域采用分段变磁链轨迹结构的控制方法。 |
| 3. | Based on the analysis of designed cad graphics and the given parameters , computer can convert the cad graphics to a acdbpolyline which can simulate the routine of the conveyor chain . then by using the method of point - by - point strain calculation , computer could figure out each point ’ s strain of the chains under different load states , and get the results such as strain ’ s maximal and the minimal values and their positions , weight of the strain equipment and power of the drive electric - machinery that the conveyor need
通过对设计的cad图形和给定参数的分析,将输送链运行轨迹转化为一条可模拟输送链轨迹的多义线,然后用逐点张力计算法动态地计算出各种加载状态下输送链上各点的受力,得出最大、最小受力点的力的大小和位置,拉紧装置的重量,驱动电机所需的功率等结果。 |
| 4. | Based on the theory creation of space voltage vector ' s polygonal flux linkage locus , freewill partition of the ideal flux circle is realized by the software method . furthermore , different polygonal flux linkage locus ' s fluent switching point is also found , which overcomes the motor " switching failure and improves the speed adjusting dynamic performance
在充分研究磁通轨迹法原理的基础上，采用软件方法实现了任意多边形磁链轨迹的生成；并找出了不同磁链轨迹间的平滑切换点，解决了切换时的电动机失步问题，提高了系统转速调节的动态性能。 |
| 5. | The dissertation deals in details with the basic principle of direct torque control . according to the faults of traditional direct torque control and the requirement of an induction motor ' s control strategy change the method of regulating stator flux to make its path approximate to a circle as possible as could . to get quickly torque control , use a three - value regulator
本论文介绍了电动机直接转矩控制的基本原理，并根据传统直接转矩控制存在的缺点以及对电动机调速性能的要求，改变对定子磁链的调节方式，使定子磁链轨迹近似为一圆形，对转矩采用三值调节器进行调节，以实现转矩的快速调节。 |
| 6. | The accurate calculation of the input voltage and the compensation for the dc - offset error and the variation of the stator resistance are important factors in practical implementation of the integration since they can cause a drift in the stator flux linkage trajectory and furthermore deteriorate the quality of torque control
因此，输入电压的准确计算、直流漂移量的补偿以及定子电阻变化的补偿都是影响积分计算准确性的重要因素，这些误差会导致定子磁链轨迹的偏移，进而降低系统转矩控制的性能。 |
| 7. | In the control software , the object - oriented method is used for doing system analysis and study . furthermore , the message - driven mechanism is used in the control software research and design . the instantaneous zero vector inserting space vector pwm theory is adopted to control the permanent magnet synchronous machine as the driver motor in the control software
软件采用面向对象的程序设计方法对系统进行分析与研究，将消息驱动机制应用于控制软件的设计和开发之中，在控制软件中采用瞬时零矢量插入磁链轨迹法(电压空间矢量法)来控制永磁同步电机。 |
| 8. | According to the faults of traditional direct torque control and the requirement of an induction motor ' s control strategy , the author changes the method of regulating stator flux to make its path approximate to a circle as possible as could and put forward a new way to use a three - value torque regulator
本论文研究了异步电动机的数学模型，介绍了直接转矩控制的基本原理，并根据传统直接转矩控制存在的缺点以及对电动机调速性能的要求，改变对定子磁链的调节方式，使定子磁链轨迹近似为一圆形。 |
| 9. | After the analysis of the state of converter switches , the voltage space vector is received . on the basis of hexagon stator flux trace method of traditional direct torque control , by changing the regulation of stator flux , hexagon and approximate round trace of stator flux can be got when using different voltage space vector . the fast regulation is realized when three - value regulator is used to adjust torque
通过对逆变器开关状态的分析进而得到电压空间矢量，并且论述了电压空间矢量与转矩和磁链之间的关系，使用两点式调节方法对定子磁链进行调节，实现六边形磁链轨迹和圆形轨迹方案，对转矩采用三值调节器进行调节，以实现转矩的快速调节。 |
| 10. | In the synchronous " model , based on the idea of polygonal flux linkage locus , by means of constructing the switch state period table of three phrase voltage inverter is required . in the brushless model , the igbt ( isolated gate bipolar transistor ) switch state period table is gained by gal ( generic array logic ) which analyzes the signal of position feed - back
在同步方式下，基于多边形磁链轨迹法的思想，用作图法求得三相电压型逆变器的pwm波形序列；在无刷直流方式下，用gal对位置反馈信号进行逻辑综合，得到开关管的导通规律。 |
