电源故障

Based on the analysis, we proposed an efficient deducible fault-finding method which could not only diagnose and repair the failures but also find out the relative branches influenced by the faults.

在增加Petri网标识的冗余度基础上，通过构造监督矩阵和冗余矩阵，提出了具有自校正能力的Petri网模型；给出了Petri网有效的递推寻错法，该方法不仅能够检测和纠正Petri网中出现的故障，而且可以给出实际对象网络中与故障相关的进程；利用不间断电源的Petri网模型验证了递推寻错法的正确性以及在实际应用中的可行性

Repair Methods: The examination revealed that, instead of fixing devices, nor is it the power, small relays, but the power box, a small box next to a heating pipe 102J small contact resistance and circuit board bad, because it is both circuit board, to both sides of welding, electric welding FERROCHROME After troubleshooting.

检修方法：通过检查发现，不是定影器的问题，也不是电源、小型继电器的问题，而是电源盒旁边的一个小盒里管加热的一个102J小电阻和线路板接触不好，因为是两面线路板，要两面焊接，用电铬铁焊好后故障排除。

Firstly,the design principles of hardware circuits are illustrated by taking instances of simulated circuits towards solar battery arrays and ullage apparatuses.

为验证和考核某卫星电源系统故障诊断专家系统的可行性和正确性，作者根据电源系统的工作原理，研制和开发了电源系统仿真试验台。

Using solar cell to absorb solar energy and store into battery by DC-DC charger during daytime. When in the night, battery will be discharged to white LED by optical sensor and control circuit. Since the weather maybe cloudy or rainy, there is a spare AC power supply loop consist of transformer, bridge rectifier, filter and voltage regulator to prevent battery undercharge or circuit maintain. When the output current of battery is less than the preset value, the power source of white LED lamp will be switched over to spare AC power supply loop by the comparative and switching circuit.

用太阳能板，在日间吸收太阳光，将能源用DC-DC充电器储存於蓄电池中，夜间时由光感测控制电将蓄电池放电，提供白光LED灯所需的电源，为预防阴雨天蓄电池充电足或电故障维修，将使得灯无法点，另有市电经变压器与整稳压后之预备供电回，於蓄电池输出电低於预设值时，将白光LED灯电源换至市电预备回。

Recently,the control of power supply of high frequency switch has been developed towards the "high refined and cuspidate" direction.Although the parts of apparatus have small volume and refined precision,the Electro Magnetic Interference and radiation are much stronger than before.

现在的高频开关电源控制已向&高、精、尖&方向发展，这些器件体积小、精度高，但电源内部的电磁干扰、辐射比原来更强了，为了使高频开关电源在预期的电磁环境下能正常工作、无性能降低及故障，并对电磁环境中的任何事物不构成电磁干扰，必需对其进行电磁兼容。

If the fault is out of the line, the calculation value of fault component integrated impedance reflects the line capacitive impedance with a greater amplitude; if the fault is on the line, it reflects the system impedance and line impedance with a relatively smaller amplitude. According to the amplitude of the fault component integrated impedance, the fault location can be distinguished.

在外部故障时，该比值反映输电线路上的容抗，其模值较大，内部故障时，该比值反映系统电源阻抗和线路阻抗，其模值相对较小，据此可以区分线路上的内部和外部故障。

If the fault is out of the line, the calculation value of fault component integrated impedance reflects the line capacitive impedance with a greater amplitude; if the fault is on the lines it reflects the system impedance and line impedance with a relatively smaller amplitude. According to the amplitude of the fault component integrated impedance, the fault location can be distinguished.

在外部故障时，该比值反映输电线路上的容抗，其模值较大，内部故障时，该比值反映系统电源阻抗和线路阻抗，其模值相对较小，据此可以区分线路上的内部和外部故障。

The results show that the frequency and phase position of frequency converter output power are out of phase with that of supply power, which is the main reason leading to metering system breakdown.

分析结果认为：变频器输出电源的频率和相位与供电电源频率和相位不同步是造成计量系统产生故障的主要原因。

In order to verify the author of this conjecture, I quickly Failure to open the computer's chassis cover, and then try to LAN equipment moved from a slot in a slot; after restart the computer system and enter the card attribute setting window, and then "Power Management" tab page "Allow the computer to turn off this device to save power" project selected under these conditions the author once again the state of the system to switch from standby to normal operation, when the author has found that a network connection to normal now.

为了验证笔者的这一猜想，笔者迅速打开故障计算机的机箱外壳，然后尝试将网卡设备从一个插槽挪到另外一个插槽中；之后重新启动计算机系统，并进入到网卡属性设置窗口，再将&电源管理&标签页面中的&允许计算机关闭此设备以节约电源&项目选中，在这样的条件下笔者再次将系统从待机状态切换到正常运行状态，这时笔者发现网络连接现在竟然正常了。

Is not properly set the parameters of CMOS settings for the main parameters of the hard disk, floppy drive, memory types, as well as the password, the machine the boot sequence, the virus warning switch and so on.

硬件本身故障硬件出现故障，除与其自身的质量有关外，也可能是因负荷太重或其它原因引起的，如电源的功率不足或CPU超频使用等，均可能引起计算机的故障。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。