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 site uniformly uses SPWM control technology for introduction for two reasons: one is to facilitate the comparison of different schemes; the other is because it is the most basic control technology. Other control technologies are derived from SPWM control technology. With the development of control theory and functional technology, various microcontrollers with excellent performance…
Through the previous article, we know what PWM pulse width modulation technology is, then in this article, we will talk about the advantages of PWM pulse width modulation technology when used in voltage-type inverters. ① The main circuit device for voltage control can be omitted, and the output voltage and output frequency can be adjusted…
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…