| 1. | If a sinusoidal current is sent through a moving coil galvanometer, the meter reads zero .
如果将一正弦电流通入动圈式电流计，那么这电流计的读数为零。 |
| 2. | Standard test method for ac magnetic permeability of materials using sinusoidal current
正弦电流用材料的交流磁导率的标准试验方法 |
| 3. | Voltage data come from the dynamic induced current electrical impedance tomography hardware system designed by our group , which has 32 measuring electrodes and the stimulating source is the sinusoidal current
采用本课题组研制的32电极感应电流电阻抗断层成像硬件系统并测量物理模型上的电压数据。 |
| 4. | Three - phase dry - type distribution transformers 50 hz , from 100 to 2500 kva with highest voltage for equipment not exceeding 36 kv - determination of the power rating of a transformer loaded with non - sinusoidal current
小于36kv设备的最高电压值为50hz 100 - 2500kva三相干式配电变压器.负载非正弦电流的变压器额定功率的测定 |
| 5. | Three phase oil - immersed distribution transformers , 50 hz , from 50 to 2500 kva with highest voltage for equipment not exceeding 36 kv - determination of the power rating of a transformer loaded with non - sinusoidal currents
小于36kv设备的带有最高电压值50hz 50 - 2500kva三相油浸式配电变压器.载有非正弦电流的变压器额定功率测定 |
| 6. | Three - phase oil - immersed distribution transformers 50 hz , from 50 to 2500 kva with highest voltage for equipment not exceeding 36 kv . part 4 : determination of the power rating of a transformer loaded with non - sinusoidal currents
最高电压不超过36 kv的设备用50 hz 50至2500 kva三相油浸配电变压器.第4部分:加载非正弦电流的变压器功率额定值的测定 |
| 7. | In order to decrease the cost , simplify the structure of the pmsm servo system and at the same has no effect on the system performance , this paper uses hall element as the position sensor , which has very low solution but very low cost , and in order to realize sinusoidal current drive of pmsm , this paper presents a new rotor position estimator based on flux estimation
为了降低成本，简化系统，本文采用低分辨率的霍尔元件作为pmsm伺服系统的位置传感器，采用基于磁链观测法的低分辨率位置传感器控制技术，来估计电机转子的实时位置和转速，实现电流的正弦换向，减小转矩脉动。 |
| 8. | First , we extended the liberman model of collisionless rf sheath . taking into account elastic collisions and charge - exchange collisions between ions and neutral particles , we established a self - consistent model describing the dynamics of rf sheath driven by a sinusoidal current source . the effects of collisions and rf - biased source power on the instantaneous thickness of the rf sheath and the sheath electric fields were studied
首先将liberman的无碰撞射频鞘层模型进行推广，考虑了离子与中性粒子的电荷交换碰撞效应，建立了描述碰撞射频等离子体鞘层动力学特性的自洽模型，研究了碰撞效应，射频偏压，电源参数等对射频鞘层的瞬时厚度及电场分布的影响。 |
| 9. | For the bldcm which has a general crest width of the back - emf waveform , two kinds of torque ripple conditions when drived by sine - wave current as well as by square - wave current are deduced based on the mathematical models . in addition , a comparison is carried out between these two conditions , which indicates that sinusoidal current driving is more favorable to minimizing the torque ripple when the crest width of the back - emf waveform is less than a certain value
阐述了抑制齿槽转矩措施对反电动势波形的影响，利用无刷直流电机的数学模型推导并比较了任意平顶宽度梯形波反电动势在正弦波和矩形波两种电流驱动下的电磁转矩脉动情况，得出在梯形波平顶宽度减小到一定数值后采用正弦电流驱动更有利于减小电磁转矩脉动。 |
| 10. | Permanent magnet synchronous motor ( pmsm ) drived by triphase sinusoidal current is research object in this paper . its mathematics models in several coordinate are set up , controlling principles of flux linkage and torque are discussed under dtc and the block diagram of pmsm with dtc is presented
本文以三相正弦波驱动的永磁同步电机( pmsm )为研究对象，建立了其在不同坐标系下的数学模型，并深入探讨直接转矩控制中永磁同步电机的磁链和转矩的控制思想，给出控制方案。 |
