空载

After successful starting, the control box will control the switch of the ATS to switch electric circuits of power supply.

从电网发生故障到备用机组向用电设备供电的时间为8-12S ，在市电恢复正常后，控制箱控制转换开关再次切换供电电路，恢复由电网供电，同时控制发动机空载运行发动机温度平衡并降低后，自动停机。

Into a disk, I observed careful about the rotation of the disk and head movements to the piece, under the advance and retreat into the situation, such as motor and found that the rotation of the disk normal, the motor did not act in big problem, but components in the empty head or disk, the sliding pole in the slide is very difficult to switch off the power supply, pushing gently with his hands under the head of several components to slide in the poles, there is clear sense of the hysteresis.

放进一张碟片，笔者仔细的观察了一下碟片的旋转及光头给件的动作，下进等电机的进退情况，发现碟片的旋转基本正常，电机的进退也没太大问题，反而光头组件在空载或加碟片的情况下，在滑动杆上滑动十分吃力，关掉电源，用手轻轻推了几下光头组件使其在杆上滑动，有很明显的迟滞感。

To study the effects of no load voltage step response index on disturbance quality of power system for self excited shunt excitation system, this paper analyzes the types of power system disturbances and disturbing qualities, establishes the different groups of self excited shunt excitation system according to the different overshoot in identical rise time and the different rise time in identical overshoot.

1电力系统扰动项目的选择为研究自并励静止励磁系统的发电机空载电压阶跃响应指标对电力系统扰动品质的影响，首先确定电力系统扰动种类。选择了反映大干扰稳定和小干扰稳定的发电机近端三相短路0.15切线路、远方三相短路0.15切线路、高压母线突加无功负荷、甩负荷、小干扰振荡模式计算等5个项目。

Through the analysis of practical structure of network and character of generators, considering the generator unit's self-exciting and the overvoltage of the no-load circuit in course of power transmission, a counterplan of Black-Start is drafted out under emergency accident.

通过对这个地区的网架结构和机组特性的分析，并考虑了机组的自励磁问题和送电过程中空载线路的过电压问题，编制了巴盟地区电网的黑启动的预案。

Considering the generator unit's self-exciting, overvoltage of the no-load circuit in course of power transmission, the structure of network and load distribution situation in the area of Heilongjiang, the whole network is divided into four small systems: JingPo Lake, LianHua factory, FuEr factory and HarBin.

结合&黑启动&机组所在区域的电网结构和负荷分布情况，并考虑机组的自励磁问题和送电过程中空载线路的过电压问题，将整个黑龙江电网划分为4 个小系统，即镜泊湖、莲花厂、富二厂和哈尔滨小系统。

The reason of low system efficiency of the mechanical lifting is: unavailable match between transformer and asynchronous motor with large capacity of equipment and large self-consumption; large average no load less of Y series electrical machinery (31.4% of the total oilfield electrical machinery) with 2.86kw; limited adjustable extent of stroke of the electrical machinery in low-liquid produced wells with minimum value of 4 times per minute for limitation of minimum rotation of the electrical machinery and minimum arc of contact of pulley. Energy consumption will be waste for 1 to 1.5 times per minute is enough.

分析显示，造成抽油机系统效率低的原因主要是：变压器与异步电动机之间匹配方式不合理，设备容量大，自身损耗大；占油田电机总量31.4%的Y系列电机的平均空载损耗大，为2.86kW；低产液井电机的冲次可调范围有限，受电机最低转度和皮带轮最小包角限制，其最小冲次仅可调到4次／min，但1~1.5次／min的冲次即可满足生产需要，造成能耗浪费。

The walk marked the highpoint of China's third manned space journey, which has received widespread media coverage.

步行标着着中国第三次太空载人旅程的重要性，已经收到了广泛媒体的报道。

Most papers [1] published before were concerned with the problems of design and calculation of fluxgate magnetometers at noload in the measuring coil.

关于两次谐波磁强计的设计和计算问题，过去发表的文献中所讨论的[1]，多在测量线圈处于空载情况下。

The developed motor prototype was tested and its load characteristics were measured. The maximum stall torque of 0.48 N·m is reached which is 1.7 times as high as the conventional onesided TWUSM, and its idle speed is 86 r/min.

最后利用自行研制的电机样机进行了实验，该样机的最大堵转力矩是0.48 N·m，是与其相近尺寸的传统单面齿超声电机的1.7倍，样机的最大空载速度是86 r/min。

The unarmed plane is operated by a 24-person crew, which includes three pilots, onenavigator, three tactical evaluators, one flight engineer, equipment operators,technicians and mechanics.

飞机空载时可容纳24人，其中包括3名飞行员，一名导航员，3名战术情报鉴定员，1名随机工程师，数名系统操作员，技师和机械师。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。