矿用宽电压自适应防爆本质安全型电源设计

针对煤矿井下供电电源输入电压等级多、用电设备易受到大型设备启停影响的特点,提出了宽电压自适应防爆本质安全型电源设计方案。该电源采用智能移相调压技术和宽电压开关电源技术,通过单片机实现了85～825V宽输入电压的自动高低压段识别、自动切换、智能移相调压处理;通过脉宽调制方式将波动的电压转换为稳定的直流电压。实验结果表明,该方案很好地解决了矿井电源多电压等级、输入电压波动范围大的问题。

Design of mine-used adaptive wide-voltage power supply with explosion-proof and intrinsic safety

For characteristics that power supplys in coal mine underground has multi input voltage grades and are susceptible to disturbed when big equipments are starting or stopping,the paper put forward a design scheme of adaptive wide-voltage power supply with explosion-proof and intrinsic safety.The power supply uses intelligent phase shift voltage regulating technology and wide-voltage switching power supply technology,and adopts single-chip microcomputer to realize automatic identification of high and low voltage section,automatic switch,intelligent phase shift voltage regulating of 85-825 V wide input voltage,and uses PWM to convert fluctuant voltage to a stable DC voltage.The experiment results show that the scheme solves problems of multi voltage grades and wide-voltage fluctuation of mine-used power supply.