国产精品久久久久久久久,四季AV一区二区夜夜嗨,日韩精品无码中文字幕电影,www.五月婷婷.com

$$$$$$$$$$$$$$$$$$$$$$

3HNA017678-001

3HNA017678-001

3HNA017678-001

$$$$$$$$$$$$$$$$$$$$$$廈門興銳嘉進(jìn)出口有限公司

感謝您的關(guān)注，真誠的期待與您的合作。

Thanks for paying attention to us and we sincerely hope to have good business with you. 

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

????????????

聯(lián)系人：鄭阿清                                          
手 機(jī)：
18106937709（微信同號）
QQ: 3007272972               

????????????????????????????????????????????????????????????

Reflect the relationship between the capacity of inverter and the total output power of motor. If the output power of the motor is constant, the capacity of the inverter connected to the control windings will be greatly reduced, and the influence of the inverter on the power grid will be reduced. As a special motor, the design of brushless doubly-fed machine (BDFM) is quite different from the traditional wen-liu motor. The number of pole pairs determines the speed of the motor, so the number of pole pairs of power windings and control windings can be selected reasonably according to the speed requirement. When the double-fed operation, the relationship between the motor speed and the pole logarithm is called the synchronous speed of the motor. According to the working principle of the motor, the winding with more pairs of Poles is usually chosen as the main winding to bear most of the power of the motor, and the winding with less pairs of Poles is used to bear the excitation power. In order to avoid the asymmetrical magnetic pull and electromagnetic noise caused by the magnetic fields with two different pole pairs coexisting in the same motor. The rotor of brushless doubly-fed machine (BDFM) is designed with different pairs of stator primary and secondary windings. The effect of the "pole-to-log converter" directly affects the performance of BDFM. Compared with the high-voltage inverter system, the brushless doubly-fed machine can be used as a common asynchronous motor when the inverter fails, which is very important for those occasions where no shutdown is allowed. But the brushless doubly-fed machine also has the limitation, when the design needs according to the concrete request synthesis consideration. If the speed is increased, the volume of the motor will be greatly increased and the manufacture will be more difficult. 

????????????????????????????????????????????????????????????

初一一條線， 初二看得見， 初三初四像娥眉， 十五十六圓又圓。  

 
????????????????????????????????????????????????????????????

3HNA013121-001

????????????????????????????????????????????????????????????