CN2427029Y - Single three-phase conversion transformer - Google Patents

Abstract

The utility model relates to power equipment, particularly the improvement of transformers. The utility model is characterized in that a primary coil and a coil L1 of an A phase branch are connected in series with a capacitor C0 and a resistor R1 which are parallel connected with each other; a coil L 3 of a C phase branch is connected in series with an inductor L0 and a resistor R2 which are connected in parallel with each other; a coil L2 of a B phase branch is connected in parallel with the coil L1 of the A phase branch and the coil L3 of the C phase branch by inphase opposition, and both ends M, N are input by single phase; the sealed star points of the secondary coil a, b, c are zero; a0, b0, and c0 are three-phase lead terminals. The utility model can realize the conversion of the single-phase electricity and the three-phase electricity.

Description

Single three-phase conversion transformer

The utility model relates to power equipment, specifically a kind of improvement of transformer.

At present, people common household electricity and office's electricity consumption be single-phase ac power supply, just must use single-phase motor as working power, the shortcoming of single-phase motor is that starting torque is little, efficient is low, and using three-phase alternating-current motor as need is to be difficult to accomplish, and can only be to set up a three-phase wire in addition, the occasion institute requirement big to meet starting torque, that efficient is high; Its shortcoming is that three-phase electricity needs stringing again, and infusion of financial resources is big, expense height, indoor complex circuit.

The purpose of this utility model is the shortcoming at above-mentioned existence, and a kind of multiple electricity consumption occasion requirement that adapts to is provided, transformer that can single three phase supply.

Technical essential of the present utility model is: it realizes single three phase supply by the change to primary and secondary coil connected mode, it is characterized in that primary coil and A branch road coil L mutually ₁With capacitor C in parallel ₀And resistance R ₁Serial connection, the coil L of C phase branch road ₃With inductance L in parallel ₀And resistance R ₂Serial connection, the coil L of B phase branch road ₂With the A coil L of branch road mutually ₁With the C coil L of branch road mutually ₃Parallel connected in reverse phase, the single-phase input of two ends M, N; Secondary coil a, b, c envelope asterism are 0, a ₀, b ₀, c ₀Be the three-phase exit.

Appearance of the present utility model can realize that the conversion of single-phase electricity and three-phase electricity is used, and when using three phase electric machine, need not prepare three-phase power line, and is as the driving of the motor of civilian well, electric water pump water lift, wood craft machines, all comparatively convenient.It is simple in structure, and is easy to use, easy to utilize.10KV send electricity with single line, and the earth send single-phase electricity as the loop, and secondary the change to be mutually the hexagonal angle three-phase electricity and use for power.

Description of drawings:

Fig. 1 is a wiring schematic diagram of the present utility model.

Fig. 2 is the vector relations schematic diagram of Fig. 1.

From accompanying drawing as seen, primary coil A addition capacitor C of the present utility model ₀But 60 ° of phase shifts, C addition inductance L ₀Phase shift-60 °, 180 ° of the opposite phase phase shifts of B, secondary coil L _{1 ＇}, L _{2 ＇}, L _{3 ＇}Be connected into Y shape, U _a, U _b, U _cBe mutually 120 °, three phase mains.A, B, C are elementary first head, and X, Y, Z are elementary tail head.

This single three phase mains conversion can be passed, and when single-phase bigger load can cause three-phase imbalance, such as exchanging the single-phase electricity welding machine, utilizes the utility model to power load balancing simultaneously with regard to available three phase mains synthetic single phase alternating current power supply A, B, C.

Claims (1)

1. a single three-phase conversion transformer has primary coil and secondary coil, it is characterized in that primary coil and A branch road coil L mutually ₁With capacitor C in parallel ₀And resistance R ₂Serial connection, the coil L of C phase branch road ₃With inductance L in parallel ₀And resistance R ₂Serial connection, the coil L of B phase branch road ₂With the A coil L of branch road mutually ₁With the C coil L of branch road mutually ₃Parallel connected in reverse phase, the single-phase input of two ends M, N; Secondary coil a, b, c envelope asterism are 0, a ₀, b ₀, c ₀Be the three-phase exit.

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