A multifunctional transformer
A transformer and multi-functional technology, applied in the direction of transformer/inductor core, transformer/inductor coil/winding/connection, AC power input conversion to AC power output, etc. Advanced problems, to achieve the effect of reducing the occupied area, reducing the weight of the iron core, and reducing the price
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Embodiment 1
[0042] The first single-phase multifunctional transformer is formed on the basis of single-phase DC saturated reactor. The first type of single-phase multi-function transformer includes a single-phase DC saturated reactor core. The single-phase DC saturated reactor core has at least two core columns with equal cross-sectional areas. Each of the two core columns can form at least one A closed loop of magnetic flux that does not pass through the opposite leg. There is a primary AC coil and a DC coil on one of the iron core columns; there is also a primary AC coil and a DC coil on the other iron core column; the number of turns of the primary AC coil on the two iron core columns is equal, and The number of turns of the DC coil is equal. The DC coil flows a DC current, and the DC current generates a DC magnetic flux on the iron core; continuously adjusting the magnitude of the DC current can continuously adjust the saturation degree of the saturable reactor iron core, and realize...
Embodiment 2
[0061] The working principle of the first type of single-phase multi-function transformer can be extended to the first type of three-phase multi-function transformer. The first type of three-phase multifunctional transformer is based on the three-phase parallel DC saturated reactor, and the three phases A, B, and C respectively add two secondary AC coils with the same number of turns to realize the three-phase transformer function. After the function of the three-phase transformer is added, a three-phase relay protection device is added. The three-phase relay protection device is connected with the control circuit of the three-phase parallel DC saturated reactor to realize the function of the three-phase current limiter. The typical circuit of the first three-phase multi-function transformer is as follows: Figure 4 shown.
[0062] The first type of three-phase multifunctional transformer includes a three-phase DC saturated reactor core I11, a three-phase DC saturated reactor...
Embodiment 3
[0076] The structure and connection method of the second single-phase multi-function transformer are as follows: image 3 shown. It includes: single-phase transformer, nested single-phase multi-function transformer. The nested single-phase multi-function transformer is the first single-phase multi-function transformer whose rated voltage is lower than the system rated voltage; the nested single-phase multi-function transformer also removes the relay protection device 7 of the first single-phase multi-function transformer. The single-phase transformer is composed of a primary AC coil L7, a secondary AC coil L8, and a transformer core 10. The turn ratio N between the secondary AC coil L3 of the nested single-phase multifunctional transformer and the primary AC coil L1 is N, and the ratio of the secondary side voltage to the primary side voltage of the nested single-phase multifunctional transformer is 2N. The turns ratio between the transformer secondary coil L8 and the transf...
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