These high frequencies correspond to the rotation speeds of centrifuges; America tightly controls the export of frequency converter drives able to operate at frequencies above 600 Hz.
这些高频率与离心机的转速相对应；美国对能够以600赫兹以上频率运行的频率转换器驱动的出口进行了严格管控。
The small signal analysis of laser diode type all optical wavelength converter is presented using carrier depletion, and the frequency response function is given.
理论上基于载流子消耗机制，对激光器型波长转换器进行了小信号分析，给出了频率响应函数。
In this paper, a resistance - to - frequency converter consisting of a Wheatstone bridge followed by an integrator and a comparator is described.
文中给出了一个由惠斯登电桥、积分器、过零检测器等组成的电阻-频率转换器。
Based on the static characteristics of induction motor, this paper analyzes the braking function of general voltage vector controlled frequency converter.
本文从感应电机的静态特性出发，分析了通用电压矢量控制变频调速器的制动功能。
This article talks about the ways and the laws of using a frequency converter to realize energy saving on producing some products.
本文对一些产品使用变频器实现运行节能的方法和意义进行了论述。
All these requirements order operation switch, valves, and corresponding control frequency converter to complete.
所有这些要求顺序操作相应开关、阀门和控制变频器来完成。
Frequency converter drives motor to realize stable velocity change operating.
变频器驱动电机，实现调速运转稳定。
Maintenance department: maintenance industries circuit boards, machine equipment system, main board, controller, power supply, frequency converter, PLC and touch screen.
维修部：维修各行业电路板，机加工设备系统，主板，控制器，电源，变频器，PLC触摸屏等。
Therefore, point and interval prediction for system efficiency can be realized through frequency of frequency converter.
因此可由变频器的频率对其效率进行点预测或区间预测。
Proficient in PLC programming (Siemens), human-machine interface touch screen, frequency converter, servo driver, stepper motor.
精通PLC编程（西门子、三菱），人机接口触摸屏、变频器、伺服驱动器、步进电机。
The frequency converter to provide professional maintenance services.
提供专业的变频器维修服务。
All speed regulators are vector frequency converter.
所有调速器均采用矢量变频器。
When exported to other countries and regions, equipment according to the local power grid electricity standards and to make corresponding changes, just a frequency converter device.
当销往其他国家和地区时，设备因应本地电网用电标准而做相应改动，只需设备一台变频器即可。
The model considers the dynamics of converter switch circuit and can be applied in the analysis for high frequency dynamic characteristics.
该模型考虑了换流器开关电路的动态特性，适用于高频动态特性分析。
Electrical factors can be adjusted by setting up serial mainboard parameters and frequency converter parameters.
电气因素由串行主板参数和变频器参数设置调整。
The adopted control mode of previous common frequency converter is usually of open loop constant voltage ratio, which its control curve is not stable.
早期通用变频器大多为开环恒压比的控制方式，控制曲线不稳定。
Driving is mainly regulated by frequency converter, with high driving accuracy of synchronous belt.
主传动采用变频调速。同步带传动，传动精度高。
Dual PWM converter has introduced the PWM rectification energy evolution installment in common currency frequency changer's foundation.
双pwm变流器是在一般通用变频器的基础上引进了PWM整流的能量变换装置。
In this paper a PLC controlled induction heating system is presented base on the analysis of medium frequency parallel converter.
本论文在对中频感应加热及相关技术作出研究的基础上，探讨了PLC控制感应加热成套系统的控制和相关技术。
Feed roller is driven by an electronic frequency converter which permits stepless variation of its speed and is controled to be synchronized with doffer by the computer.
给棉罗拉采用调频电机传动，实现无级变速，通过计算机控制与道夫传动同步。
At the same time, the automatic energy-saving mode frequency converter LG, can make the motor in the meet load torque requirements to minimum current operation, to reach better energy saving effect.
同时，LG变频器的自动节能模式，可使电机在满足负载转矩要求下以最小电流运行，达到更好的节电效果。
When frequency converter and PLC is at fault, automatic switch to the original soft start work frequency power operation, ark to ensure the normal work of the compressor.
当变频器及PLC发生故障时，自动切换到原软启动柜工频电源运行，以保证压缩机的正常工作。
This paper presents two kinds of braking circuits with PWM frequency converter, this circuit possess good effect in practical application.
本文介绍了用于PWM变频器的两种制动电路。此电路在实际应用中效果很好。
The paner intrdue the application of frequency converter in improving crude oil Stabilization unit and it's operating situation.
本文简述了变频调速器在原油稳定装置技术改造过程中的应用及其运行情况。
Automatic constant pressure control of system has completed by press-sensor, PLC, frequency converter etc.
系统通过压力传感器、PLC、变频器等设备完成供水系统自动恒压控制。
With this technique, the effect of equivalent high switching frequency converter has been obtained with low switching frequency converter.
提出了基于载波组合相移技术的电流型电力有源滤波器，在较低的开关频率下实现了等效的高频载波效果。
The basic operation principle of the series active power filter for harmonic suppression of frequency converter is analyzed in this paper, and its control method and control circuit are studied.
文章分析了适用于变频器谐波抑制的串联型有源电力滤波器的基本工作原理，并对其控制方法和控制电路进行了研究。
Popularizing and applying frequency converter technology is one of the important methods of the prompting the industry advance.
进一步的推广应用变频调速技术，是推动我国工业技术进步的重要举措之一。
Which select and use reasonably frequency converter is the basic condition to realize the functions, its control way is the key to decide the usage property of the frequency converter.
而变频器的合理选用是实现这些功能的基本条件，其控制方式又是决定变频器使用性能的关键所在。
Unfavorable influences of frequency converter on AC motor and methods of solving are described, providing basis for selecting motor for further development of frequency converter motor system.
阐述了现代变频器对交流电机产生的各种不利影响及解决办法，为今后研究设计变频器电机系统时选择电机提供了依据。
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