开关

The oxygen life indictor is an open-loop system made up of the step motor with a photoelectric switch .

仿真氧气生命指示器采用步进电机驱动和光电开关定位开环控制系统，在设计和实现中成功地解决了指示器盘面刻度非均匀的问题，并解决了光电开关确定零位问题和限位问题。

The raise of power electronic device's switching frequency brings on a series of problems such as switching loss, component wastage, inductive turn off and electromagnetic interference etc.

电力电子装置开关频率的提高带来了开关损耗与器件损坏问题、感性关断和电磁干扰等一系列新问题。

The other two folding beams are designed to ensure the inertial mass to move in one direction.

该开关采用倾斜微梁支撑敏感质量块，两折叠梁固定于质量块的上下表面，保证开关动作的方向性。

But the inhesion of that high frequency radialization and conductive electromagnetic interference, that effected efficiency and application of switchingmode power supply, so it became hotspot and focus.

但开关电源固有的高频辐射及传导的电磁干扰发射对开关电源效率及使用的影响已成为人们关注的热点。

E. , large volume of instantaneous flow and fast speed of switch with continuous regulation and lower cost.

针对快压射压射控制的特殊要求，提出一种开关阀和电液比例阀并联的混合式快压射速度控制阀结构，理论证明它可以满足快压射速度控制中瞬时流量大，开关速度快，而且能够连续可调、成本低廉的要求。

Based on the needs of system control strategy and the output of the active inverter, a switch function method was adopted to build the average model of switch cycle for the active inverter in order to accurately analyze operation characteristic of active inverter, a feed forward and double loop control strategy is put forward, its double control includes a inductor current inner loop control and instantaneous voltage outer loop control.

中文摘要：为准确分析有源逆变器的运行特点，根据系统控制策略的需要，在考虑了有源逆变器输出的基础上采用开关函数法建立了有源逆变器的开关周期平均模型。提出一种前馈加双环控制的控制策略，它的双环控制包括一个电感电流内环控制和一个瞬时电压外环控制。

The interrupter switch is part of a disconnect switch arm and is secured to the support housing.

上述断路器的开关是一根隔离开关臂的一部分，并固定在支承壳体上。

On this basis, the prccesses of interrupting small inductive current by the vacuum interruptor were modelled in a computer program, and the effects of the circuit conditions on the vacuums ...

通过试验和模拟计算，获得了ZN—6/600真空开关有关截流、触头间隙击穿和电流高频过零熄弧的随机特性，分析了一些电路条件对真空开关开断感性小电流时的操作过电压的影响。

The crossover operation is performed only on the corresponding genes. The mutation and inverse operation is limited within the gene.

摘 要：提出了相邻开关在染色体中相邻以及构成同一环路的开关在同一基因块内的编码方法。

The invention discloses a DC/DC circuit, comprising a PWM controller, a current amplifier, a peak current comparator, an error amplifier, a main switch, a synchronous switch and also an operational amplifier. The non inverting input end of the operational amplifier is used for coupling with input voltage or voltage reference, or used for coupling with the input voltage and the voltage reference; the inverting input end of the operational amplifier is used for coupling with the voltage reference or ground, and the output end thereof is connected with the non inverting input end of the error amplifier.

本发明公开了一种DC/DC电路，包括PWM控制器、电流放大器、峰值电流比较器、误差放大器、主开关和同步开关；还增设运算放大器，其同相输入端用于与输入电压或基准电压耦合，或用于同时与输入电压和基准电压耦合；其反相输入端用于与基准电压或地耦合，其输出端与所述误差放大器的同相输入端连接。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。