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.
In order to reduce input current harmonics and improve input power factor, a.r.prasad proposed a three-phase boost single switch SPWM PFC rectifier circuit in 1987, as shown in Figure 1-1. S in the figure is a single tube control switch, l is the input boost energy storage inductance, CD is the DC filter capacitor, and…
The three-phase half-bridge SPWM inverter VSV-PWM state space modulation mapping method is also called the six-step PWM mapping method. It is a drawing method that makes the magnetic flux trajectory tend to be circular, or a method of finding the magnetic flux trajectory using the drawing method. The basic idea is to use numerical control…
The voltage space phasor representation is a method that directly combines the SPWM and the circular trajectory of the motor flux linkage, which was proposed by J.Holtz in 1983. According to the principles of electrical engineering, the sine quantity can be represented by a complex number, that is, it can be represented by the projection…