The sensors including oil pressure sensor, proximity switch, flow sensor, pullon the rope sensors, current sensors, gas concentration sensor, power transducer, ultrasonic liquid level sensor, temperature sensor, tension sensor.

Therefore, it is necessary to develop a power transducer that can measure dynamic signal of cutting process and provides interfaces for output signals.

因此必须设计一种能正确测量切削过程动态信号并能提供输出接口的功率变送器。

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The influence of three phase quantity symmetry on measuring error of reactive power transducer

三相电量对称性对无功功率变送器测量误差的影响

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The Design of a New Type Three-dimension Power Transducer Based on Piezoelectricity

基于压电式新型三维力传感器的设计

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Design of a Railway Switch Power Transducer Based on RS-485 Communication

基于RS-485通讯的转辙机功率传感器的设计

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Airgap Flux Trace Control Method for PWM Variable Frequency Induction Motor Drive System With Microcomputer

微型机控制的磁通轨迹法PWM交流变频调速系统

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Its technical difficulty, mainly in the variable frequency AC motor drive speed systems.

其技术难度主要在驱动交流电动机的变频调速系统上。

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Analysis of Capacity Calibration of MPM Main Drive Variable Frequency Asynchronous Motor

连轧管机主传动变频异步电动机容量校验分析

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Variable Frequency Asynchronous Motor Electromagnetic Design Program Based on VB and MATLAB

基于VB和MATLAB的变频异步电动机电磁设计程序

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Discussion on Design of Variable-Frequency Motor

浅谈变频电机设计要点

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Discussion on Design Characteristics of Variable-Frequency Motor

浅谈变频电机的设计特点

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Method for Measuring the Efficiency of Variable-Frequency Motor

变频电动机效率的测试方法

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Since the wave impedance of variable frequency motor being significantly greater than the wave impedance of the cable, making variable frequency motor suffer approximately the twice of pulse leading edge voltage, the coil insulation layer of variable frequency motor occurs partial discharge during operation.

由于变频电机的波阻抗明显大于电缆的波阻抗，使得变频电机受到约两倍的脉冲前沿电压，导致变频电机线圈绝缘层在运行过程中发生局部放电。

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By analyzing the operation performance under the initial air gap in finite element before and after the variable frequency motor was optimized and comparing with experimental results, it proves reliable to use the finite element method to analyze sinusoidal transient field.

通过有限元法分析原始气隙下变频电动机优化前后的工作性能，与实验结果进行了对比，证明了有限元法分析电机正弦时变场的可靠性。

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Use the variable frequency motor instead of the original electromagnetic speed-adjustable motor. Redesign of the hydraulic system, add electro-hydraulic proportional valve and one-way throttle valve to ensure the accuracy of automatic control and experimental safety.

使用变频调速电机代替原有的电磁调速电机，对液压系统进行重新设计，添加电液比例阀以及单向节流阀，保证自动控制的精度以及实验安全。

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One of them is to increase the load rate of the electric motor, including the use of Y-△ starter, voltage regulating device, variable frequency motor, two-speed motor or energy-saving coupling.

其中，提高电动机负载率的途径有采用Y&△转换启动器、调压节电器、变频调速电动机、双速电动机和安全节能联轴器等。

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This thesis provides many pictures of experiment to study the performance of the rotor variable frequency motor and established the foundation of the study the rotor variable frequency motor in other aspects.

文章提供大量试验图形来研究转子变频电机的性能，为转子变频电机在其他方面的研究奠定了基础。

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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。

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As the power equipment of high-speed EMUs, the life of variable frequency motor has an important impact to the stable operation of EMUs.

变频电机作为高速动车组的动力设备，其寿命对动车组稳定运行具有重要的意义。

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Adopted the advantages of the same-type motors of industry-advanced countries such as German and Japen, QABP Series Motors are designed with computer assistant technology.

QABP系列变频调速电机吸收了德国、日本等先进国家产品之优点，应用计算机辅助设计技术进行设计。

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There are many types of main circuit for high voltage VFDs, mainly are current source type, 3-level PWM type with clamped neutrals, unit series multi-level type and multi-level together with multi-layer type.

高压变频器主电路拓扑结构形式有多种，主要有电流源型变频器、中性点钳位三电平PWM变频器、单元串联多电平变频器、多电平+多重化变频器等。

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