Digital variable frequency is a key technology of soft radio.
数字下变频技术是软件无线电中的关键技术之一。
The result shows that the mid-voltage variable frequency inverter can run safely and stably.
实验结果表明，该中压变频器能够安全、稳定地运行。
Applying variable frequency technique and automation control technique in intelligent oil pumping system improves the existing pumping unit.
应用变频调速技术、自动控制技术改造现有的游梁式抽油机，实现了抽油系统的智能化。
Combining the variable frequency condensing pumps with the turbine driven feed water pumps can reduce the auxiliary power consumption and improve the unit efficiency.
将变频凝结泵与汽动给水泵联合使用，降低了厂用电，提高了机组效率。
An integrating device of variable frequency and speed-down is an important driving and control unit which combines a variable frequency module, a variable frequency motor and a retarder.
变频减速一体机是将变频模块、变频电机和减速机有机集成一体的重要传动控制单元。
The flux compensation research of variable frequency hydraulic compound control system.
变频驱动液压复合控制系统的流量补偿研究。
An APFC control solution for high power variable frequency air conditioner is introduced.
本文介绍了较大功率变频空调的一种APFC方案。
The effect of economizing energy after application of variable frequency regulating velocity was appraised.
并对采用变频调速后的节能效果进行了评价。
By using the special control algorithm of variable frequency drive system, the above said problem is solved.
设计了基于变频驱动系统的专用控制算法来解决“倒发电”问题。
Secondly, the paper designs and realizes the two level variable frequency heating power supply with line of 380V.
随后，本文给出了380V电源供电的二电平变频加热电源的主电路和控制电路的设计与实现。
This paper discusses the method that is applied in SPWM variable frequency system based on editable DSP controller.
阐述了一种以可编程DSP控制器为核心的应用于变频系统中正弦脉宽调制（SPWM）方法的实现。
The author has developed a dissipation factor measuring system using the variable frequency series resonant voltage.
本文研制了一套在调频串联谐振电压下进行介质损耗因数测量的系统。
The experiments of load manifest that the test sample of variable frequency drive for SPCP has good driving capability.
试验样机的带载试验表明，潜油螺杆泵变频驱动装置试验效果良好，性能达到了设计要求。
The SA4828 used as SPWM signal generator controls the IPM via driver circuits to produce variable frequency power supply.
它以SA 4828作为SPWM信号发生器，经过驱动电路控制IPM模块，产生三相变频电源。
Theoretic basis and application effect of using variable frequency regulation technique in power demand side were analyzed.
对电力需求侧采用变频技术的理论依据及实际应用中取得的效果进行了分析。
In high precision variable frequency speed adjusting system, system's performances are guaranteed by accurate motor parameters.
在高精度变频调速系统中，准确的电动机参数是系统性能的保证。
This paper studied the three-phase PWM(pulse width modulation) rectifier in dual PWM variable frequency speed regulation system.
对双PWM变频调速系统中的三相PWM整流器及其控制方法进行了研究。
Based on the characteristics of adjustable speed with variable frequency systems, the paper presents an optimal design strategy.
本文根据变频调速集成系统的特点，提出具有针对性的变频调速电机优化设计策略。
Using multi variable frequency domain stability criterion, this paper analyzes the stability of the adaptive laser resonator system.
用多变量频域稳定性判据，分析了自适应激光谐振腔系统的稳定性。
It is proposed to adopt variable frequency regulators regulating oilfield water injection pumps so as to reach the target of energy-saving.
针对这一问题，提出采用变频调速装置对油田注水泵用电动机进行变速调节，以达到节能降耗的目的。
The main parts of the aircraft VSCF electrical power system consist of the no-brush AC variable frequency generator, converter and controller.
飞机变速恒频电源系统的主要部件有无刷交流变频发电机、变换器和控制器。
Cascade multilevel inverter has extensive application in the high voltage variable frequency modulated Speed System for its numerous advantages.
级联式多电平逆变器因其具有众多的优点，在高压变频调速领域中得到广泛应用。
For this project ABB Italy and ABB South Korea will supply low voltage switchgear, intelligent motor control units and variable frequency drives.
ABB意大利公司和ABB韩国公司将为这个项目提供低压开关柜，智能电机控制单元，以及变频器。
By adjustment to control signal, systems might realize variable voltage, variable frequency, steady voltage, steady frequency closed loop control.
通过对控制信号的调整，系统可实现变压、变频、稳压、稳频的闭环控制。
Based on the new ANN (artificial neural network) inverse system control method, the AC variable frequency speed control system is analyzed and experimented.
本文运用神经网络逆系统这一新的控制策略，对异步电机变频调速系统进行可逆分析与控制试验。
The AC-DCAC voltage source inverter composes the main circuit of this variable frequency system and CPLD is the logic control device of the power device (IPM).
该变频调速系统主电路采用交-直-交形式，以(CPLD)作为调速系统逆变电路功率开关器件(IPM)的逻辑控制器件。
In this system, the variable frequency motor is applied to meet the requirement of low speed to check the compositive error and high speed to measure the vibration.
针对检测综合误差和振动时对主轴转速的要求，采用变频电机来控制主轴转速，以满足系统对转速的要求。
The principle, the function and the character of variable frequency regulating velocity and application on typical chemical industry production unit was introduced.
介绍了变频调速的基本原理、功能、特点及其在化工生产典型装置中的应用情况。
A two-stage compression variable frequency air source heat pump (TV-ASHP) has been developed combining variable frequency technology with two-stage compression cycle.
将双级压缩和变频技术有机结合，提出一种适用于寒冷地区双级压缩变频空气源热泵系统。
A two-stage compression variable frequency air source heat pump (TV-ASHP) has been developed combining variable frequency technology with two-stage compression cycle.
将双级压缩和变频技术有机结合，提出一种适用于寒冷地区双级压缩变频空气源热泵系统。
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