水电站流量水头计算器，能计算水头流量及输出电流等参数。-head Hydropower flow calculators, head can be calculated output current flow and other parameters.

该文件为ORCAD绘制的通用开关量板电路原理图，可以兼容N多种数字电路，采用24V直流供电，输出电流0-50mA可以驱动大部分弱点开关，接触器，继电器，指示灯，步进电机等，具有隔离抗干扰，常闭或常开可自主选择，多达12路数字量输出的优点。-The document for the general switch ORCAD drawing of the circuit board schematics, can be compatible with N variety of digital cir

三相PWM整流器仿真文件，包括S函数实现，实现了四象限整流器输入电流谐波，功率因数可控，输出母线电压稳定。-Three phase PWM rectifier simulation files, including the S function, to achieve the four quadrant rectifier input current harmonics and power factor control, the output voltage stability.