查询词典 induction current

The present invention relates to an inrush current limiter device for limiting inrushing current to a connectable load comprising: at least one switchable IGBT (Insulated Gate Bipolar Transistor)-based limiter unit for selectively limiting the inrushing current, having at least one current limiting conductor element for limited leading of current, and at least an IGBT-based switch, whereby the IGBT(Insulated Gate Bipolar Transistor)-based switch (Q2) is used as well as a controlled current limiter and as a by-pass element, and at least one control device for controlling the IGBT-based switch, whereby the control device comprises at least one IGBT-based switch supply and means for realizing a smooth flank of an output signal at the selected conductor element.

本发明涉及一种用于限制针对可连接负载的浪涌电流的浪涌电流限制器设备，包括：至少一个可开关的基于IGBT的限制器单元，用于选择性地限制浪涌电流，其具有至少一个限流导体元件，该限流导体元件用于有限引导电流，和至少一个基于IGBT的开关，其中基于IGBT的开关(Q2)用作受控电流限制器和旁通元件，和至少一个控制设备，用于控制基于IGBT的开关，其中控制设备包括至少一个基于IGBT的开关电源和用于实现选定导体元件处的输出信号的平滑侧面的装置。

The transient air gap magnetic fields under different conditions are also calculated and analyzed. The novel finite element method directly using magnetic induction as unknown variable has many advantage. It is analyzed theoretically in detail. Nonlinear eddy current field equations and finite element equations using magnetic induction as unknown variable are developed.

直线电机的磁场是一非均匀、非线性的涡流场，文中对非均匀磁场及材料的非线性进行了分析，提出了相应的解决办法，采用以向量磁位为求解量的传统有限元法，对不同合闸角下筒式复合次级圆筒型直线感应电机的瞬态特性进行了计算与试验分析，对不同条件下瞬态气隙磁场进行了研究。

Induction watt-hour meter is the principle of electromagnetic induction to voltage, current, phase into a magnetic moment, and promote aluminum rotating disk, the disk axis gear-driven drive device degrees of drum rotation, that is, the process of turning is the cumulative amount of time to process.

感应式电能表是采用电磁感应的原理把电压、电流、相位转变为磁力矩，推动铝制圆盘转动，圆盘的轴带动齿轮驱动计度器的鼓轮转动，转动的过程即是时间量累积的过程。

Based on matrix analysis of motor and general theory of alternating current machines,3-phases induction synchronous motor is substituted for symmetrical 2-phases motor with even gas,then the equation for instantaneous torque of induction synchronous motor step motion is obtained.

文中采用了电机的矩阵分析方法，根据交流电机统一理论，将三相感应式同步电机用等效的具有均匀气隙的两相电机来代替，得出了感应式同步电机步进运动的瞬时转矩表达式。

Week 2 Self-induction, mutual induction, energy of magnetic field,/displacement current, integral form of Maxwell equations.

第2周 自感互感磁场的能量；位移电流；麦克斯韦方程组的积分形式。

As an induction motor, it is inevitably for the levitation control winding of bearingless induction motor to induce current in the squirrel cage.

无轴承异步电机作为一种感应电机，其悬浮控制绕组在鼠笼转子中不可避免地感应电流，也就是存在电流损耗。

When wound-rotor induction motor is operated at over speed driven by induction motor and its rotor winding is excited by altemating current with working frequency higer frequency altemating volage can be produced.

应用异步电机拖动绕线转子异步电机超速运行且其转子绕组如以工频交流励磁产生高频交流电的原理，组成150Hz固定频率M-G交流发电机组，进行YZ、YZR系列电机超速及升高电压试验。

So we designed a adaptive synchronizing controller based on hereinbefore hardware environment: first a small magnitude reference signal r is outputted to system through the signal card (to ensure that the vibrating system works in a linear state), and this signal is sent to the moving coil of vibrator through the power amplifier, so vibration is produced through electromagnetic induction. Secondly the vibration signal can feedback to the data acquiring card in the servo system through the acceleration sensor on the Vibroseis reactor M〓 and the base-plate M〓, then the computer can get the current vibrating state y〓 of the coil of vibrator according to the feedback information from the data acquiring card, and give a real time comparing between the current state y〓 and the reference output y〓 of the set-in reference model with current reference input being r , then regulates the correlative controlling parameters according to the error e〓=y〓-y〓 till y〓→y〓, finally normal signal sweeping begins with a certain phase fixed. Meanwhile a synchronization signal for seismic signal record is sent to seismograph from synchronization signal outputting component in the Vibroseis system to perform the controlling process of synchronization of sweeping phases.

为此，我们基于以上的硬件环境设计了一个自适应同步控制器：首先通过信号发生卡对系统输出小幅度的参考信号r(从而保证振动系统工作处于线性状态)，信号通过前置放大器、功率放大器等送到激震器动圈，并通过电磁感应产生振动，振动信号通过可控震源激震器反应块M〓和基板M〓上的加速度传感器反馈给伺服系统中的数据采集卡，工控计算机根据采集卡的反馈信息，获取当前激震器动圈的振动状态y〓，并实时地将该状态与内置的参考模型在当前参考输入r下的参考输出y〓进行辨识，再将两者输出误差e〓＝y〓-y〓对系统的有关控制参数进行调整，直至y〓→y〓，最后在经过某一固定的相位后，开始信号的正常扫描过程，与此同时，由可控震源系统的同步信号输出部件向地震仪送出一地震信号记录同步信号，进而完成扫描相位同步控制过程。

Three-phase squirrel-cage induction motor in its structure is simple, cost-effective and of good work, and many other advantages, in today's industrial applications in various fields have a wide range of applications, but it is an obvious shortcomings, is the starting current too big ( General starter for the rated current of the current five to seven times or even greater), so regardless of the motor itself, or the power grid and other electrical equipment, will have a negative impact.

留学解答资讯网：三相鼠笼式异步电动机以其结构简单、性价比高和工作特性好等诸多优点，在当今工业应用的各个领域都有广泛的应用，但它有一明显缺点，就是起动电流过大(一般起动电流为额定电流的5～7倍甚至更大)，这样不论是对电动机本身，还是对电网以及其他电气设备，都会产生不利的影响。

The most common ratio using current asset and current-liability data is the current ratio, which is current assets divided by current liabilities.

利用流动资产和流动负债数据计算的最常见的比率是流动比率，即流动资产除以流动负债。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。