3 phase online ups uninterruptible power supply electrical Circuit knowledge
Provide knowledge of UPS uninterruptible power supply, understand the classification of UPS uninterruptible power supply and UPS electrica Circuit, etc.
This time, we introduce a 12-phase diode rectifier technology that uses transformers to inject harmonics, which can make 12-phase diode rectifiers become 24-phase diode rectifiers to improve the input power factor of mains power. The harmonic injection circuit is composed of an injection transformer and a single-phase rectifier bridge. The circuit utilizes the characteristic that…
The so-called inverter refers to the reverse converter of a rectifier (also known as a smooth converter). The so-called IGBT three-phase SPWM inverter refers to a power electronic converter that uses the semiconductor power switching device IGBT as a switch and adopts the SPWM control method to convert DC power into a three-phase AC power…
PWM pulse width modulation technology (Pulse Width Modulation, PWM) refers to the use of a reference wave (usually a sine wave, sometimes a trapezoidal wave or a sine wave or square wave injected with zero sequence harmonics) as a modulating wave (Modulating Wave) ), and F (F is the carrier ratio) times the frequency of…