Combine detailed introducing the single electrical engineering control system that a machine constitute, and pass to expand 8255 design for completing keyboard with realistic electric circuits.
并详细介绍了单片机组成的电机控制系统，以及通过扩展8255芯片完成键盘和现实电路的设计。
The system consists of the AC input stage, single phase PFC, main inverter, output low-pass filter, auxiliary power supply, and load current sharing circuit, etc.
整个电源由输入电路、功率因数校正器、主逆变器、输出滤波电路、辅助电源、均流电路等部分组成。
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