4 Phase-Shifting Transformers Shipped To The Philippines
10-18 2024 | By:
Project time: October 2024
Country: Philippines
Manufacturer: ZTelec Group
Product: Phase-shifting rectifier transformer
Quantity: 4 units
phase-shifting transformers
phase-shifting transformers
Classification of phase-shifting transformers
There are many types of phase-shifting transformers. From the perspective of the application, there are three-phase three-wire, three-phase four-wire or single-phase lines. If divided by the phase shift angle, there are continuous or stepping within a certain range of 0~360°. If divided by the value of the power index m of the regular 6×2 polygon in the circle, when m=0, it is a regular hexagon; m=1, dodecagon; m=2, twenty-tetragon… Regular hexagonal phase shifters can be divided into external triangle hexagons, internal triangle hexagons, triangle star hexagons and double star hexagons. External triangle hexagonal phase shifters can be evolved into multiple lines depending on the requirements of input and output. In addition, there are triangle extended edge phase shifters and single-phase phase shifters.
Where are phase-shifting transformers mostly used?
Phase-shifting transformers are mostly used on the input side of high-power inverters and high-power DC power supplies. The purpose of using a phase-shifting transformer is to increase the number of pulses of the rectifier. Three-phase rectification is called 6-pulse rectification. The three-phase transformer generates another group of three phases after phase shifting. The rectifier input is 6 phases, which is called 12-pulse rectification. The three-phase transformer generates another three groups of three phases after phase shifting. The rectifier input is 12 phases, which is called 24-pulse rectification. The more pulses of the rectifier, the smaller the input current harmonics and the smaller the harmonic pollution to the power grid.
1. Limited to the withstand voltage problem of IGBT, in order to obtain high voltage output, multiple power units must be superimposed.
2. Avoid the influence of harmonics on the power grid.
The purpose of using a phase-shifting transformer is to increase the number of pulses of the rectifier. Three-phase rectification is called 6-pulse rectification. The three-phase transformer generates another group of three phases after phase shifting. The rectifier input is 6 phases, which is called 12-pulse rectification. The three-phase transformer generates another three groups of three phases after phase shifting. The rectifier input is 12 phases, which is called 24-pulse rectification. The more pulses of the rectifier, the smaller the input current harmonics and the smaller the harmonic pollution to the power grid.
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