送丝调速系统由功率MOSFET开关控制电路、脉宽调制电路及控制电路构成。
The wire feeder timing system consists of MOSFET switch control circuit, PWM circuit and control circuit.
分析了脉宽调制信号动态调节LED亮度的原理，设计了单片机控制电路；
The principle of PWM signals adjusting LED bright was analyzed, and the controlling circuit of MCU was designed.
采用脉宽调制（PWM ）技术发生脉冲信号，设计了控制电路和IGBT驱动保护电路，研制了专用脉冲电源。
The special pulse power supply is researched and manufactured. The PWM is adopted to produce pulse signal.
采用脉宽调制（PWM ）技术发生脉冲信号，设计了控制电路和IGBT驱动保护电路，研制了专用脉冲电源。
The special pulse power supply is researched and manufactured. The PWM is adopted to produce pulse signal.
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