Power conversion apparatus having a boost power factor correction (PFC) function and controlling inrush current and power conversion method thereof

摘要

An apparatus/method is provided. The power conversion apparatus includes: a rectifying unit including a silicon-controlled rectifier thyristor (SCR) for rectifying single-phase power externally inputted; a power factor correcting unit configured to correct a power factor of the power rectified by the rectifying unit; and a control signal generating unit configured to detect a zero-crossing point based on the single-phase power inputted and generate a pulse single of which a width increases as time elapses based on the detected zero-crossing point. The rectifying unit rectifies the single-phase power by using the pulse signal inputted to a gate terminal of the SCR.

主权项

1. A power conversion apparatus comprising:
a rectifying unit comprising a silicon-controlled rectifier thyristor (SCR) for rectifying externally input single-phase power; a power factor correcting unit configured to correct a power factor of the rectified power; a signal detector configured to detect the single-phase power; a single-phase PLL configured to detect first and second zero-crossing points based on the detected single-phase power and to generate a carrier signal that increases as time elapses based on the detected first and second zero-crossing points; and a PWM generator configured to compare a reference signal with the generated carrier signal and to generate a pulse signal having a width that increases as time elapses, wherein the rectifying unit rectifies the single-phase power by using the generated pulse signal input to a gate terminal of the SCR, wherein the single-phase PLL detects the first zero-crossing point where the single-phase power changes from positive to negative and detects the second zero-crossing point where the single-phase power changes from negative to positive, and wherein the single-phase PLL generates the carrier signal by: generating a first carrier signal when the first zero-crossing point is detected and resetting the first carrier signal when the second zero-crossing point is detected; and generating a second carrier signal when the second zero-crossing point is detected and resetting the second carrier signal when the first zero-crossing point is detected.