The research of the residual voltage of induction motor after dumping and its influence during restoration 感应电动机失电残压的研究及其对重合过程的影响
In the field of measurement, the sensors and circuits may inevitably cause residual voltage and zero drift called zero error. 在测量领域中,传感器与测量电路一般都不可避免地存在残余电压与零点漂移,即零点误差。
Transient Stability Calculation Based on Residual Voltage Transformation Method for Short-circuit Faults 基于短路故障残压变换法的暂态稳定计算
Development and Application of Metallic Oxide Arrester with Lower Residual Voltage 新型低残压金属氧化物避雷器的研制与应用
A residual voltage transformation method for short-circuit current calculation with matrix transformation 利用矩阵变换求解电力系统短路故障的残压变换法
As the main appliance for overvoltage protection in electric system, the characteristic of Metal Oxide Surge Arresters ( MOA) is decided by the unit residual voltage of non linear resistance. 金属氧化物避雷器作为电力系统过电压保护的主要电器,其保护特性非线性电阻片的残压决定。
First, through analyzing the reason of residual voltage, its properties were discussed. 首先,对电机失电后定子残余电压进行分析,讨论了定子失电残余电压的产生、性质;
Producing Reason and Compensation Method of the Differential Transformer Residual Voltage at Zero Point 差动变压器零残电压产生的原因及其补偿方法
This paper focus on diagnosing rotor winding faults in asynchronous motors by residual voltage after AC dump. 对利用失电残余电压诊断异步电机转子绕组故障进行研究。
And the new transfer equipment has such function: high-speed, synch capture switch and residual voltage switch. 提出新型切换装置应具备快速切换、同期捕捉切换、残压切换功能。
The computation of residual voltage offers the theoretical foundation to the design of automatic secondary reclose, and it is also the analysis basis for capacity braking. 残压计算为自动二次重合闸装置的设计人员提供了理论依据,也是分析异步电动机电容制动过程的基础。
A theoretic analysis was made on residual voltage of capacitors and voltage of two ends of silicon control pairs after switching-off of the silicon control in the TSC system. Points for attention were given in selection of the equipment according to the above state. 从理论上分析了TSC系统中晶闸管关断后电容器上残压和晶闸管对两端的电压,并据此提出了设备选型时需注意的问题。
In this paper, the generation of the Residual Voltage of asynchronous motor after AC Dump ( RVACD) was analyzed; 对异步电机失电残余电压的产生进行分析;
Finally, residual voltage can be used in rotor winding faults diagnosis was testified by simulating calculation and experiment. 最后,通过仿真计算与实测研究,验证了理论分析的正确性和基于失电残余电压的电机转子绕组故障诊断方法的可行性。
The structure and output quality of differential transformer sensor were introduced simply. The producing reason of residual voltage at zero point and its affection to the nonlinear quality and sensitivity of measurement system were analyzed extensively. 介绍了差动变压器式传感器的结构和输出特性,详细分析了其零残电压产生的原因,以及对测量系统非线性和灵敏度的影响。
Study on the Characteristics of the Residual Voltage of the ZnO Ceramic Varistor at the Heavy Impulse Current 氧化锌压敏电阻片冲击大电流残压特性的研究
The generation of the residual voltage for asynchronous motor after AC Dump ( RVACD) is analyzed, it establishes the simulation calculation model and carries out simulation calculation. 对异步电动机失电残余电压的产生进行分析,建立了异步电动机失电残余电压仿真计算模型,并进行仿真计算。
The system automatically selects from either the Fast, In Phase or Residual Voltage method for power supply bus transfer. 该装置在电源母线切换过程中自动选择快速切换、同相切换及残余电压切换方式。
The circuit parameters of impulse residual voltage measuring generator for testing non-linear varistors were simulated and calculated by MATLAB programmer, the relations of circuit parameters and loads vs pulse current waveform parameters were derived. 仿真计算非线性压敏电阻限制限压测试回路的参数得出了回路及负载参数与回路输出波形参数间的关系。
The paper simulates the residual voltage of stator winding during the break period on the basis of accurate mathematical model for induction motor. 利用异步电动机的准确数学模型,对异步电动机断电时定子绕组的残压进行了计算机仿真;
The integrated voltage control and reactive power compensation of substation, the prevention of system resonant over-voltage and capacitor residual voltage, the reliability and sensitivity of protection, and the grouping and circulating switching of capacitors are realized. 变电站电压的综合控制与无功补偿、系统的谐振过电压与电容器的剩余电压、保护的可靠性与灵敏度、电容器的分组与循环投切等难题得到彻底解决。
It is understandable after analysis that one phase feeder circuit breaker may trip and another will not due to the different short circuit current and different residual voltage. 经分析可知,在短路电流不同、残压不同的情况下,会发生一相馈线断路器跳闸而另一相不跳闸的现象。
Based on characteristics of discrete variable frequency soft starting, a novel speed measuring method using residual voltage after AC dump was proposed, and its counting formula, analysis of errors were presented. 针对离散变频技术调压调频的特点,提出了基于电动机失电残余电压的测速方法,推导出了转速计算公式,并进行了误差分析。
The voltage balance protection according to connections of capacitor group is used for the inrush current and resonance during its switch-in, the series reactor for the explosion during its operation and the parallel discharge coil for the residual voltage during its switch-out. 针对补偿电容器投入时的涌流与谐振、运行中的爆炸、切除后的剩余电压等问题,分别采用了按电容器组接线的电压平衡保护、串联电抗器、并联平衡放电线圈等技术;
This paper analyses the change process of the voltage applied on the motor groups-the residual voltage in generatrix when the house supply is transfered. 分析厂用电切换时施加在电动机群上的电压,即母线残压的变化过程;
In actual operation, discharge dispersivity of the four-star connection MOA would reduce sensitivity of protection. R-C absorption device as a spare protector of the four-star connection MOA solved the above problem, improved waveform of the overvoltage and reduced residual voltage of a lightning rod. R-C阻容吸收器作为四星型接法MOA的后备保护器,解决了四星型接法MOA实际存在的放电分散性使保护灵敏度下降问题,改善了过电压波形,降低了避雷器的残压。
The reason of causing the spot flaw and higher residual voltage of Se film was discussed. 微量杂质硫在硒膜和原料中均存在不均匀分布,它是造成硒感光鼓斑点缺陷和表面剩余电位高的主要原因。
The residual voltage is the voltage remained between the plug pins immediately after the plug of the device disconnected from the power supply, or the voltage remained in the energy storage components such as capacitors immediately after the electrical equipment disconnected with the power grid. 剩余电压是指用插头连接电源的设备在拔掉插头的瞬时,插头上各插脚之间的残余电压,或者是当断开电气设备电网供电的瞬间内部储能元件(如电容)上的残余电压。
Through a large number of experiments and the Cadence circuit simulation, it verified that the signal SPD had filter discrimination. And under the impulse tests of surge current, it can effectively limit the residual voltage within the tolerance which the device can take. 通过大量的实验以及Cadence电路仿真,验证了该信号SPD具有较好的滤波功能,且在电涌电流冲击测试下能够有效地将残压限制在设备耐受的范围内。