ST MCU控制450W UPS参考设计方案
ST公司的UPS参考设计12ST05v031采用离线拓扑实现,具有AVR升压和火线降压稳压.逆变器模块包括推挽DC/DC转换器和DC/AC全桥输出,可产生准正弦波形.采用微控制器来控制UPS的所有功能,包括监视火线参数如输入/输出火线电压和相位,输出逆变器电压,电池电压,输出电流和输出功率等. 参考设计12ST05v031的输出功率为700 VA / 450 W,输入电压从160 Vac ± 3%到294 Vac ± 3%,输入频率50Hz,输出电压184 - 265 Vac ± 3 Vac,输出频率50 Hz ± 0.1 Hz.所采用的电池电压为12V,电池容量7.2Ah.本文介绍了450W UPS参考设计的主要特性和详细的电路图以及所采用的元器件清单(BOM).
This UPS reference design 12ST05v031was built employing off-line topology with AVR boost and buck regulation of the mains. The inverter module contains the push-pull DC-DC converter and the DC-AC output full bridge generating a quasi-sine waveform.
A microcontroller controls all UPS functions. It monitors the mains parameters (input/output mains voltage and phase, output inverter voltage, battery voltage, output current and output power) in order to ensure the proper level of the output voltage.
The UPS was designed with RS-232 joint signal and USB interfaces (USB for RS-232 converter). It is possible to connect the UPS to a PC using an RS-232 or USB cable and control the UPS status through the UPS Monitor 3.0x software that must be installed on the same PC.
参考设计12ST05v031主要特性:
■Output rating power: 700 VA / 450 W..
