Variable frequency motor drive, soft start, soft stop, stable and reliable, small impact.
采用变频电机驱动，软启动，软停止，平稳可靠，冲击小。
It is difficult to design especially large variable frequency motor-driven centrifugal compressor unit in long distant pipeline.
特大型变频电机驱动离心式压缩机组的设计难度较大。
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。
In this paper, firstly the mathematic model for variable frequency motor is developed, and harmonic wave is analyzed when variable frequency motor is fed by inversion.
本文首先建立变频电动机的数学模型，对逆变器供电时的谐波进行了分析。
This text is chiefly directed against the selection of variable frequency motor and inverter in the lathe numerical control rebuilding, and the lectotype of converter is analyzed.
本文主要针对车床数控化改造中变频电动机的选择、频器的选型进行分析。
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 control system of multi-connected air-condition unit is the control unit which combines a variable frequency module, a variable frequency motor of compressor and a system of refrigeration.
多联空调机组控制系统是将变频模块、变频压缩机和制冷系统有机集成一体的控制单元，其技术核心是变频控制模块。
Considering this, this paper presents a method by experiment which can measure performance curve of silicon steel sheet at different frequency as reference of designing variable frequency motor.
针对这种情况，本文提出一种实验的方法，测取不同频率下硅钢片的特性曲线，以供变频电机设计时参考。
The variable frequency AC controller mounts directly on the AC motor.
变频空调控制器直接安装在交流电机。
This can offer certain reference to engineering design of low-voltage large-power variable-frequency motor.
这对低压大功率变频电机的工程设计具有一定的参考价值。
This paper introduces how to measure output of the inverter by simulating quantity of it, and the method for calculating the efficiency of variable-frequency motor.
本文介绍了如何通过变频器的模拟量输出来测量变频器的输出功率，进而计算出变频电动机效率的方法。
Now the novel linear motor of bidirectional pulse variable-frequency control is applied to drive the flow control pump successfully.
目前，设计的双向脉冲变频控制的直线电机已成功应用于计量泵的驱动器中。
The speed of main motor can be adjusted in variable frequency so as to adapt different cutting force and drilling speed.
主电机可变频调速，以适应不同的切削力和钻孔速度。
Tension system of gravure printing machine is a nonlinear system with variable parameters, the change of this system is very wide, so the author USES frequency conversion motor as its executive body.
印刷机张力系统是个变参数的非线性系统，它变速范围大，所以采用的是变频器驱动交流电机作为执行机构。
This paper introduces a frequency variable control system for elevator driven by linear induction motor, and this elevator has been tested.
设计了一套圆筒形直线感应电动机驱动的电梯全数字变频控制系统，对其进行了试验。
Control Techniques variable frequency drives provide continuous control, matching motor speed to the specific demands of the work being performed.
控制技术的变频驱动器提供连续控制，配套电机的速度，工作的具体要求正在执行。
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。
Variable frequency and variable speed motor system is of high intelligence, high reliability, fault-tolerant capability.
变频调速电动机系统具有高智能、高可靠性和高容错能力。
For the purpose of meeting high efficiency and premium efficiency motor tests, a set of static variable frequency power supply test system was researched and designed.
从满足高效和超高效电机的效率测试出发，研究和设计了一套基于静止变频电源的电机效率测试系统。
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。
In this paper, a slip-frequency vector control system using a single-chip micro - computer 8031 of MCS-51 family for variable frequency speed control of induction motor is introduced.
本文介绍了一种采用MCS—51系列单片机8031对异步机实行滑差频率矢量控制的调速系统。
This paper presents the methods of transfer function analysis and engineering design for variable frequency adjustable speed system of induction motor supplied by current source inverter.
本文提出了一种异步电动机电流型变频调速系统传递函数的分析及工程设计方法。
The operating status of three-phase three-wire HAPF(Hybrid Active Power Filter) in harmonic suppression and reactive power compensation for variable-frequency motor are introduced.
介绍了三相三线制混合型有源电力滤波器在变频调速电动机谐波治理和无功补偿方面的运行情况。
It has proven by practice that the two solutions both can implement Variable Frequency Control of ac Motor well, and have good applied cost.
实践证明，两种解决方案均能很好地实现交流电机的变频控制，具有良好的应用价值。
It found that the method is able to analyze diagnostic characteristics of the variable frequency speed regulation system with asynchronous motor.
实践证明，该方法可以有效地分析变频调速异步电机故障。
Astoria USES frequency modulation motor, belt drive, to achieve a continuously variable.
道夫采用调频电机，齿形带传动，实现了无级变速。
The main spindle is driven by a variable frequency controlled AC motor.
主轴是由变频控制交流电机驱动。
This of those includes description to the variations of the pump efficiency, motor efficiency and variable frequency drive (VFD) efficiency at the reduced load conditions.
这其中包括了对部分负荷下泵效率、电机效率和变频器效率变化的说明。
In this paper GTR Base-drive circuits on PWM variable frequency and variable speed systems for induction motor drive are studied.
本文介绍了为异步电动机PW M变频调速系统而研制的GTR基极驱动电路。
In this paper GTR Base-drive circuits on PWM variable frequency and variable speed systems for induction motor drive are studied.
本文介绍了为异步电动机PW M变频调速系统而研制的GTR基极驱动电路。
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