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。
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。
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。
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。
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。
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。
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