| 1. | Mehtods of measurement of temperature coefficient of permanent magnet materials
永磁材料温度系数测量方法 |
| 2. | Verification regulation of standard sample of the magnetic properties of permanent magnet materials
永磁材料标准样品磁特性试行检定规程 |
| 3. | Test method for magnetic properties of high - coercivity permanent magnet materials using hysteresigraphs
使用磁滞曲线绘制仪测试高矫顽磁力永磁材料磁性能的方法 |
| 4. | Standard test method for magnetic properties of high - coercivity permanent magnet materials using hysteresigraphs
利用磁滞图示器对高矫顽永久磁性材料磁性能的标准试验方法 |
| 5. | With the development of high - energy permanent magnet materials , the permanent magnet synchronous generator shows its superiority among all kinds of generators
摘要随着高性能永磁材料的发展，永磁同步发电机在各类发电机中越来越具有竞争力。 |
| 6. | We can foresee the further development about pmbldcm and its control system with the price debased of permanent magnet material and manufacture of rotor . pmbldcm may have a wonderful foreground in many fields
可以预见，随着永磁材料和电力电子器件的价格的进一步降低，以及无刷直流电机驱动的理论研究和实践应用的不断完善和提高，永磁无刷直流电机及其控制系统将在很多场合有广泛的应用前景。 |
| 7. | Permanent magnet synchronous machine ( pmsm ) has been paid more attention in the past two decades by researcher in the motor and control system fields because of its excellent performance for example small cubage , great power density and good efficiency we can foresee the further development about pmsm and its control system with the reduce of the permanent magnet material ' s price and producing the rotor progress in the power electronics apparatus and high - speed processor and control theories .
经过努力，其本体设计和控制方式在近二十年内得到了长足的发展，商用化的产品也已经进入到工业生产应用等各个领域。可以预见，随着永磁材料价格和电动机制造价格的降低，电力电子器件及高速微处理器的进去，驱动系统理论研究和实践应用的不断完善和提高，永磁同步及其驱动系统将会得到进一步的发展和应用，在某些场合将逐渐取代现有的普通电励磁电机及其驱动系统。 |
| 8. | The preparation of sm - f - n alloy is a very complex process and it ' s magnetic properties are affected by many factors , so it is the purpose for this paper to investigate concrete method which optimizes the preparation of sm2fe17nx alloys , makes the cost lower and magnetic properties higher . it has important significance to realize the commercialization of sm2fe17nx permanent magnet materials
Sm - fe合金的制备是一个十分复杂的过程，其磁性能受多种因素的影响，因此本课题的目的在于探讨能够优化sm _ 2fe _ ( 17 ) n _ x合金的制备工序，降低生产成本以及提高磁性能的具体途径，这对其实现商品化有着重要的意义。 |
| 9. | Design engineers now selecting pmbldc motors over conventional dc or induction motor drives for the following reasons : 1 ) the absence of brushes results in an essentially maintenance free operation and eliminates the undesirable effects of commutation such as sparks , brush - loss , radio - frequency interference , etc . 2 ) the low inertia of the rotor enhances the quality of the mechanical response of the motor , shortening the acceleration and deceleration time . 3 ) utilizing rare - earth permanent magnet materials with high coercive force results in substantially higher efficiency than their counterpart with brushes of the same size . 4 ) because of the absence of commutation segments , the stator construction is simple
现在的工程师们更为青睐永磁无刷直流电动机是因为以下几点原因： ( 1 )去除了电刷的永磁无刷直流电动机彻底地免除了维护而且消除了我们不希望的由于换向带来的火花、电刷损耗以及无线电干扰等等； ( 2 )低转动惯量的转子提高了电机机械响应的质量，从而缩短了电机加速和减速的时间； ( 3 )高矫顽力稀土永磁材料的使用使得同样尺寸的永磁无刷直流电动机比传统的直流电动机效率高； ( 4 )由于没有机械换向部分定子的结构简单了。 |
| 10. | With the development of permanent magnet materials , the permanent magnet ( pm ) machine shouldbe applied more and more widely because of its excellent efficiency , such as : high power density , low runcost , good reliabilityand efficient of conserving energy etc . in engineer , the initial scheme would be given by the engineer who has rich experiences when the electrical machine is designed
稀土永磁同步电动机具有效率高，功率密度大，成本低，运行可靠，节能效果好等优点，随着永磁材料的不断发展，稀土永磁同步电动机必将在各个领域得到越来越广泛的应用。在工程中进行电机设计时，一般都是由工程人员根据经验提出一个初步方案，然后进行试制与调整。 |
