| 1. | External voltage controlled frequency function
外部电压频率控制功能vcf |
| 2. | Application of stationary compress control frequency converted regulating speed system for air compressor station
恒压缩控制变频调速系统在空气压缩机站的应用 |
| 3. | Change to departure control frequency 118 . 1 after airborne . caution for possible turbulence from the dc8 just departed 3 minutes ago
离地后换至118 . 1起飞管制频率。注意， dc8刚起飞3分钟，可能有颠簸。 |
| 4. | This paper has introduced briefly a kind of simple practical method that uses the export interface of spindle of the sinumerik 802c numerical control system to control frequency converter
摘要简要介绍了利用西门子802c数控系统的主轴输出口控制变频器的一种简单实用的方法。 |
| 5. | The interface utilizes the high - speed pu lse function of plc basic unit to realize the control frequency of pulse , pwm regulate voltage and to make use of drivers of step motor control step motor
利用plc主机模块的高速脉冲输出功能，控制脉冲频率的发生、 pwm脉宽电压的调节，并通过步进电机驱动器实现对步进电机高效控制。 |
| 6. | Some problems are solved in applying to produce . 1 ) to test piezoelectric wafer ' s saw transmission speed . use sorts of wafers having different speed during produce , controlling frequency consistency
在生产运用中,主要解决以下几个问题: 1 )对压电基片的saw传播速度无损测量,在生产中对不同速度的晶片进行分类使用,应用于生产以便对频率一致性进行控制。 |
| 7. | Following this conclusion , various kind of ac speed control rules have been analyzed with the favor given to the self - controlled frequency regulation drive . machine model for doubly fed power generation has been given and control equations are discussed
其次，借鉴各种交流调速方法，研究电机双馈发电运行的模型和控制手段，采用自控式调频，提出了绕线转子双馈发电机的矢量控制策略。 |
| 8. | Constant stator magnetic linkage control frequency converter includes power devices utilizing igbt , drive circuit using three - phase drive ic with multiple protection functions . pwm signal formation circuit in the way of voltage space vector control and realized with pld ( programmable logic device ) devices and compensation for the influence of supply voltage variation and stator resistance voltage drop
其中，恒定子磁链控制变频器的设计中主电路采用功率器件igbt ；驱动电路采用三相多功能集成驱动芯片； pwm脉宽调制信号产生电路采用电压空间矢量控制方式，由pld器件实现；对电源电压变化及电阻压降造成的影响进行了补偿。 |
| 9. | With the conduction property of the triggered thyristor and the intellective numerical controlled frequency reduction of the triggering pulse by mpu , we can divide alternating current into several complete sinusoidal waves to supply some loads . it can be made as a controller or a pcb ware , which is suitable for the air conditioning , machine tool and various instruments that require electric power or rotate speed adjustment
利用晶闸管的触发导通特性，用单片机对触发信号进行智能数字降频，可在交流电中切分出部分完整的正弦波形供负载使用，可以单独做成一台控制仪器或者作为一个控制电路板用于需要电功率和转速调节的空调、机床以及各类仪器设备中。 |
