CN2100017U

CN2100017U - Constant power transformer with voltage regulation under load

Info

Publication number: CN2100017U
Application number: CN 91224604
Authority: CN
Inventors: 汪明伟
Original assignee: JINZHOU TRANSFORMER FACTORY
Current assignee: JINZHOU TRANSFORMER FACTORY
Priority date: 1991-09-05
Filing date: 1991-09-05
Publication date: 1992-03-25

Abstract

The utility model discloses a loading voltage regulating transformer of constant power. The utility model is characterized in that the iron core of the prior loading voltage regulating transformer is orderly sheathed with a high voltage winding, a voltage regulating winding, and a low voltage winding from inside to outside, wherein, the end of the high voltage winding is connected with the voltage regulating winding through a tapping switch. The utility model has the advantages of small variation range of impedance voltage, wide range of voltage regulation, and easy realization of constant power output.

Description

Constant power transformer with voltage regulation under load

The utility model belongs to change magnetic flux on-load tap-changing transformer, the permanent power transformer of particularly a kind of on-load voltage regulation.

Existing change magnetic flux on-load tap-changing transformer, be to adopt the positive and negative multi-stage pressure regulating that connects of pressure regulation winding, its winding arrangement architecture is to be set with pressure regulation winding, high pressure winding and low pressure winding outward successively by the lining on the stem stem of iron core, said high pressure winding links to each other by shunting switch with the pressure regulation winding, in real work, be connected in series the number of turn and flow direction, realization variable flux voltage regulation by what change pressure regulation winding and high pressure winding.When pressure regulation winding and high pressure winding were just connecing, axially the leakage field group was one; When pressure regulation winding and the reversal connection of high pressure winding, axially the leakage field group is two.The transformer of this structure, under permanent power (the waiting capacity) condition of work of transformer, pressure regulation winding and high pressure winding are by just connecing when becoming reversal connection, axially the leakage field group becomes two by one, impedance voltage is obviously diminished, and then make impedance voltage excursion fluctuation very big, thereby can not satisfy specific (special) requirements such as the wide and permanent power output of low pressure excursion.

The purpose of this utility model is to provide the on-load voltage regulation that a kind of impedance voltage excursion is little, range of regulation is wide, the permanent power of easy realization is exported permanent power transformer.

The utility model is achieved in that it is set with high pressure winding, pressure regulation winding and low pressure winding outward successively by the lining on the iron core of existing on-load tap-changing transformer, and the end of described high pressure winding links to each other by shunting switch with the pressure regulation winding.

Advantage of the present utility model is, no matter high pressure winding and pressure regulation winding are just connecing or reversal connection, all has only an axial leakage field group, thereby the impedance voltage excursion of this transformer is little, pressure regulation changes the permanent power output of wide, easy realization, can be suitable for the transformer of permanent power output on-load voltage regulation electric furnace, rectification and other purposes.

Below in conjunction with drawings and Examples the utility model is elaborated:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is an electrical schematic diagram of the present utility model;

As shown in drawings, the utility model has a fuel tank 5, on fuel tank 5, be separately installed with HV Terminal 1, low-voltage terminal 4, shunting switch 2 and other transformer accessory, in fuel tank 5, three-phase five-limb iron core 3 is installed by securing member, on three stem stems of iron core 3, be set with high pressure winding 6 outward successively by the lining respectively, pressure regulation winding 7 and low pressure winding 8, described winding 6,7 and 8 and iron core 3 separate by insulating part, the end of described high pressure winding 6 links to each other by shunting switch 2 with pressure regulation winding 7, described shunting switch 2 be the n level just, the anti-on-load voltage regulating switch of transferring, head end (the A of described high pressure winding 6, B, C) link to each other with the HV Terminal 1 of this transformer, exit (the a1 of low pressure winding 7, a4, b3, b6, c2, c5) link to each other with the low-voltage terminal 4 of this transformer, it is terminal by linking to each other with low-voltage terminal 4 after the connection of envelope star copper bar, is the neutral line leading-out terminal (0) of this transformer.

In actual applications, the HV Terminal 1 of this transformer connects three phase mains, and low-voltage terminal 4(comprises neutral line leading-out terminal (0)) connect load by rectification circuit.When shunting switch 2 is in high pressure winding 6 and pressure regulation winding 7 and is just connecing, after the energized, the magnetic flux of high pressure winding 6 and pressure regulation winding 7 is equidirectional, the magnetic flux of pressure regulation winding 7 and low pressure winding 8 is in the other direction, therefore when high pressure winding 6 and pressure regulation winding 7 are just connecing, has only an axial leakage field group, when shunting switch 2 is in high pressure winding 6 and 7 reversal connections of pressure regulation winding, the magnetic flux of high pressure winding 6 and pressure regulation winding 7 is in the other direction, and the magnetic flux of pressure regulation winding 7 and low pressure winding 8 is equidirectional, therefore when high pressure winding 6 and 7 reversal connections of pressure regulation winding, also has only an axial leakage field group.As seen, high pressure winding 6 and pressure regulation winding 7 is just connecing or during reversal connection no matter, axially the leakage field group has only one, respective impedance change in voltage approximately linear and excursion are less, make pressure regulation excursion broad, thereby easily realize permanent power output, and high pressure winding 6 radiuses are little, and load loss is reduced.

For furnace transformer, if on the stem stem of its iron core by lining suit high pressure winding, pressure regulation winding and low pressure winding successively outward, the end of high pressure winding is still linked to each other by shunting switch with the pressure regulation winding, and the low pressure winding adopts the corner connection mode, can make the furnace transformer of the permanent power output of easy realization.

Claims

1, the permanent power transformer of a kind of on-load voltage regulation, comprise fuel tank, be installed in HV Terminal, low-voltage terminal and shunting switch on the fuel tank, be installed in the iron core in the fuel tank, it is characterized in that, on the stem stem of iron core 3, be set with high pressure winding 6, pressure regulation winding 7 and low pressure winding 8 outward successively by the lining, the end of described high pressure winding 6 and pressure regulation winding 7 by shunting switch 2 link to each other, head end links to each other with HV Terminal 1, the exit of low platen group 8 links to each other with described low-voltage terminal 4.