论文部分内容阅读
南昆线部分车站道岔转辙机采用三相电源后,信号电源只剩下一路贯通线电源,可靠性大大降低。研发的网变逆变电源装置,交流电经整流滤波后,供给逆变桥。IPM在由单片机产生的驱动信号控制下,将直流电根据SPWM原理逆变成50Hz交流电,同时使3个单相逆变器的输出电压差保持在120°,形成三相四线制交流电源,经滤波后供给负载。因此,可继续利用接触网电源给信号设备供电。
After the three-phase power supply is adopted for the switch machine at some stations of the Nankun line, the signal power supply has only one continuous power supply, which greatly reduces the reliability. Research and development of network inverter power supply device, the AC filtered by the rectifier, the inverter bridge supply. IPM under the control of the drive signal generated by the microcontroller, the DC inverter according to SPWM principle into 50Hz AC, while the three single-phase inverter output voltage difference maintained at 120 °, the formation of three-phase four-wire AC power supply, After filtering the load. Therefore, you can continue to use the catenary power supply to signal equipment.