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 the power frequency UPS, the commonly used SCR polyphase phase-controlled rectifier is a 12-phase two-phase superimposed rectifier, and the 18-phase three-phase superimposed rectifier and the 24-phase four-phase superimposed rectifier may be used. Their characteristic values are compared in Table 1. It can be seen from this table that when the UPS is working at…
Since the advent of static UPS in the 1970s, from the initial SCR discrete UPS development to today’s use of fully-controlled power devices, the intelligent UPS has gone through a total of 40 years. During these 40 years, UPS has been It is developing in the direction of reducing volume and quality and improving performance…