电气专业

d starshaped structurebased hybrid. Both forms have the characteristics of a number of bus more flexibility, easy expansion, control of relative independence, lower costs。 mixed some high reliability

ating frequency conversion velocity modulation technique in our country has big disparity pares with international level. Therefore, the AC frequency variation speed control technique has the

ified by simulations. Key words: Linear induction motor (LIM), Fieldoriented control, End effect INTRODUCTION The linear inductance motor (LIM) is used in such lowspeed Maglev system as HSST system

v e n tim e which is Faraday’s law applied to a finite time interval. It follows that Eavg = N 21/(2 )mf = 4fNφm which N is the number of turns on the winding. Form ac circuit theory, the effective

plies this power to the load. This action is known as transformer action. 3. TRANSFORMER PRINCIPLES When a sinusoidal voltage Vp is applied to the primary with the secondary opencircuited, there will

lve problems. Every neuron applies an input, activation and an output function to its input to calculate its output. The neural work is configured for a specific application, such as data

nce will influence the choice of neutral grounding 3 mode Conversely, neutral grounding mode affects design, operation, debugs and developing. Generally in the system higher in grade in the voltage,

电源消失时，为机组安全停机负荷和保证人员安全的负荷供电。 低压 380/220V 设置动力中心（ PC）和电动机控制中心（ MCC），对低压负荷供电。 (2) 厂用电系统中性点接地方式及其接入设备 6kV 中压厂用电系统中性点接地方式采用低阻接地方式，接地故障动作于跳闸。 接地电阻电流推荐值为 400A。 380/220V 低压厂用电系统中性点接地方式为直接接地。 厂用配电装置布置及设备选型