JP2020136562A - Transformation device with tap switcher - Google Patents

Abstract

To provide a transformation device which simplifies configurations of a transformer and a tap switcher and comprises the tap switcher for facilitating connection work between a coil-side tap terminal and a switcher-side tap terminal.SOLUTION: A transformation device 1 provided with a tap switching function includes: a transformer comprising coils 20U, 20V and 20W including series windings and branch windings, coil-side tap terminals 21U1-21W9 linearly and regularly arrayed on one face of each of the coils 20U-20W, and lead wiring connected to multiple points in one side part of belt-like wiring constituting the series windings, extends on one face of the coil 20U, etc., and is connected to the coil-side tap terminal 21U1 or the like; and a tap switcher comprising switcher-side tap terminals 32U1-32W9 regularly arrayed linearly with the coil-side tap terminals 21U1-21W9, and a tap lead plate connecting corresponding tap terminals such as the coil-side tap terminal 21U1 and the switcher-side tap terminal 32U1 with each other.SELECTED DRAWING: Figure 1

Description

The present invention relates to a transformer device including a tap switch.

In the field of transformers provided with a tap switch, it is required to simplify the connection structure between the tap of the winding of the transformer and the tap of the tap switch to reduce the burden of the connection work. From this point of view, in Patent Document 1, the coil side tap is pulled out from the upper end or the lower end of the coil of the autotransformer, and is between the tap on the switch side provided on the side surface of the housing of the cylindrical tap switch. The technology for connecting the above with a lead wire is disclosed. In the technique described in Patent Document 1, the lead wire is drawn from the upper end or the lower end of the coil so that the lead wire is shortened.

JP-A-2007-5574

The technique described in Patent Document 1 has a problem that another wiring must be added from the position of drawing out the coil from the winding to the position of the winding tap at the upper end or the lower end of the coil. Further, in this configuration, it is difficult to grasp the correspondence between the coil side tap and the switch side tap, and multiple types of lead wires having different lengths are required to connect them, so that mounting mistakes are likely to occur and manufacturing work is performed. There is a problem that the burden is still heavy.

The present invention has been made in view of such problems, and is a tap changer that simplifies the configuration of the transformer and the tap changer and facilitates the connection work of the coil side tap terminal and the changer side tap terminal. It is an object of the present invention to provide a transformer device provided with.

In order to achieve the above object, the transformer device provided with the tap switch of the present invention is
A coil provided with a winding, a coil-side tap terminal regularly arranged linearly on one surface of the coil, and the coil connected to a plurality of locations of the winding and extending over one surface of the coil. With a transformer, with lead wiring, connected to the side tap terminal,
A tap including a switch-side tap terminal that is regularly arranged linearly with the coil-side tap terminal, and a tap lead plate that connects the corresponding ones of the coil-side tap terminal and the switch-side tap terminal to each other. Includes a switch and.

According to the present invention, the tap terminals on the switch side are regularly arranged linearly with the tap terminals on the coil side, and the tap lead plates are connected by the tap lead plate, so that the tap lead plates are regularly arranged substantially linearly. It becomes possible to wire. Therefore, it is possible to provide a transformer device provided with a tap switch that simplifies the configuration of the transformer and the tap switch and facilitates the connection work between the coil side tap terminal and the switch side tap terminal.

It is a front view of the transformer device provided with the tap changer which concerns on embodiment of this invention. (A) is a front view of the coil shown in FIG. 1, (B) is a plan view of (A), and (C) is a conceptual vertical sectional view. It is a top view of the whole of the U, V, W three-phase coil shown in FIG. It is a side view of the coil side tap terminal and the switch side tap terminal of the transformer shown in FIG. (A) is a schematic plan view of the tap selector showing the positional relationship between the contactor of the transformer device and the tap terminal on the switch side shown in FIG. 1, and (B) to (E) are at different positions from (A). It is a schematic plan view when there is a contact. It is a schematic plan view of the switching switch of the transformer device shown in FIG. (A) is a timing chart showing the opening and closing of each switching switch from the state in which the odd tap is selected to the state in which the even tap is selected in the tap selector of the transformer shown in FIG. ~ (E) is a diagram showing the positional relationship between the linear motion cam and the cam follower in each state. (A) to (C) are diagrams showing the details of the configuration of the linear motion cam and the cam follower shown in FIG. (A) and (B) are diagrams showing a configuration example of a linear cam and a cam follower when the arrangement of the switching switch is changed. (A) is a schematic plan view of the drive mechanism of the transformer device shown in FIG. 1, and (B) to (E) are operation explanatory views thereof. (A) is a plan view of the second cam mechanism of the drive mechanism of the transformer shown in FIG. 1, and (B) is a front view of the cam guide shown in FIG. 11 (A). (A) is a front view in a state where the second tap is selected in the tap selector of the transformer shown in FIG. 1, and (B) is a tap in the process of switching from the state of (A) to the fourth tap. It is a front view of a selector. (A) to (C) are circuit diagrams at the time of tap switching in the transformer shown in FIG. It is a figure which shows the configuration example of the control part which switches a tap.

The transformer device 1 according to the embodiment of the present invention will be described below with reference to the drawings.
The transformer device 1 according to the present embodiment includes a tap switcher 30 for switching between taps of coils 20U, 20V, 20W and coils 20U to 20W, which are transformers.

(Overall configuration of transformer device 1)
As shown in FIG. 1, the transformer device 1 according to the present embodiment taps the U-phase, V-phase, and W-phase coils 20U, 20V, and 20W, and the coils 20U, 20V, and 20W, respectively, in the loaded state. A tap switching device 30 for switching an electrical connection between the devices, a drive mechanism 40 for driving the tap switching device 30, a housing 10 for accommodating these devices, and an input terminal 71 and an output terminal 72 of the transformer device 1 are provided. ..

The housing 10 has a substantially box shape, and U-phase coils 20U, V-phase coils 20V, and W-phase coils 20W are installed side by side in a straight line from left to right in the drawing on the bottom surface inside the housing 10. Further, the tap switch 30 is arranged directly above and in close proximity to these coils 20U, 20V and 20W.
The tap switch 30 includes a switching switch 31 and a tap selector 32, with a switching switch 31 on the upper side and a tap selector 32 on the lower side. Further, a drive mechanism 40 that generates a driving force for tap switching is arranged adjacent to the tap switching device 30.

The tap switch 30 and the drive mechanism 40 are fixed on a plate-shaped frame for fixing the coils 20U to 20W and their iron cores, which are provided in the housing 10.

The input terminal 71 and the output terminal 72 each penetrate the ceiling of the housing 10 and are fixed to the housing 10 via an insulator. The input terminal 71 and the output terminal 72 are connected to a lead wire that draws power from the outside and a lead wire that sends power to the outside, respectively.
The input terminal 71 is connected to the input terminal of the tap switch 30 and the output terminal 72 is connected to the switch side tap terminals 32U5, 32V5 and 32W5, respectively.

The arrangement direction of the U-phase coil 20U, the V-phase coil 20V, and the W-phase coil 20W, that is, the direction from left to right in the drawing is the X direction, the vertical direction upward is the Z direction, and the direction orthogonal to the X direction and the Z direction is the Y direction. The XYZ Cartesian coordinate system is set and referred to as appropriate. Further, the X direction may be expressed as a horizontal direction, the Y direction may be expressed as a front-back direction, and the Z direction may be expressed as a vertical direction. For the Y direction, the expression front or back may be used. Further, a plane parallel to the XY plane may be expressed as a horizontal plane.

Next, the details of each part constituting the transformer device 1 will be described.
(Explanation of U-phase coil 20U, V-phase coil 20V, W-phase coil 20W)
The U-phase coil 20U, V-phase coil 20V, and W-phase coil 20W are single-phase transformers that function as single-phase transformers for U-phase, single-phase transformers for V-phase, and single-phase transformers for W-phase, respectively. It is a vessel and has substantially the same configuration as each other. Therefore, the U-phase coil 20U will be described as a representative.
FIG. 2A shows a front view of the U-phase coil 20U, and FIG. 2B shows a plan view.
As shown in FIGS. 2A and 2B, the U-phase coil 20U has a substantially columnar outer shape, and nine coil-side tap terminals 21U1 to 21U9 are arranged on the upper portion. As shown in FIG. 2B, the odd-numbered coil-side tap terminals 21U1, 21U3, ..., 21U9 are arranged on the front side of the U-phase coil 20U, and the even-numbered coil-side tap terminals 21U2, 21U4, ..., 21U8 are arranged behind the U-phase coil 20U. As shown in FIG. 2A, these coil-side tap terminals 21U1 to 21U9 are connected to the coil-side tap terminals 21U1 to 21U9 by inserting bolts described later into the coil-side tap terminals 21U1 to 21U9 and fastening them with nuts. Two U-phase coil side terminal through holes 21U11 to 21U92 for fixing to 33U9 are formed for one terminal.

FIG. 2C shows a conceptual vertical cross-sectional view of the U-phase coil 20U.
As shown in FIG. 2C, the series winding P and the shunt winding W of the U-phase coil 20 are in the vertical direction so that the series winding P is on the outside and the shunt winding W is on the inside. It is wound almost concentrically around the axis. The series winding P is formed by winding a strip-shaped thin copper plate having a width substantially equal to the height of the U-phase coil 20U. The series winding P is insulated by being wound together with the insulating paper I.

On the other hand, the branch winding W is formed of a copper wire having a diameter smaller than that of the series winding P. Insulating paper is spirally wound around the surface of the shunt winding W, and is insulated by this.

The upper surface and the lower surface of the U-phase coil 20 are coated with insulating layers 24 and 25 formed of an insulating material such as resin, respectively.
The coil-side tap terminals 21U1 to 21U9 described above are respectively arranged and fixed in two rows on the insulating layer 24 on the upper surface side.
Each of the coil-side tap terminals 21U1 to 21U9 is connected to any of the nine tap pull-out positions of the series winding P by a tap lead wiring 26 which is a plate-shaped conductor. The tap lead wiring 26 is fixed and connected to one surface of a strip-shaped copper plate by welding, soldering, or the like. The tap pull-out positions are set at nine locations separated from one end of the series winding P. The coil-side tap terminals 21U1 to 21U9 are numbered 1, 3, 5, 7, and 9 from left to right for those arranged in the front row, and right for those arranged in the back row. Numbers 2, 4, 6, and 8 are assigned from the side to the left, respectively.
All or part of the tap lead wiring 26 may be integrally formed with the series winding P or U-phase coil side tap terminals 21U1 to 21U9.
Since the coil-side tap terminals 21U1 to 21U9 and the tap lead wiring 26 need to maintain insulation, the upper surface or the lower surface of the U-phase coil 20 does not necessarily have to be coated with the insulating layer 24 or 25.

The coil-side tap terminal 21U5 is connected to the tap lead wiring 26 and also to the output terminal 72.

The V-phase coil 20V and the W-phase coil 20W shown in FIG. 1 are V-phase and W-phase coils, have basically the same configuration as the U-phase coil 20U, and have nine coil-side tap terminals 21V1 to 21V9. And 21W1 to 21W9, respectively. The V-phase coil side tap terminals 21V1 to 21V9 and the W-phase coil side tap terminals 21W1 to 21W9 are also separated from one end of the series winding P by the tap lead wiring 26, similarly to the U-phase coil side tap terminals 21U1 to 21U9. It is connected to the drawer position set in the location.
The U-phase coil 20U, the V-phase coil 20V, and the W-phase coil 20W are connected by a star connection.

FIG. 3 is a plan view showing the positional relationship between the U-phase coil 20U, the V-phase coil 20V, the W-phase coil 20W, and their coil-side tap terminals 21U1 to 21W9. As shown in FIG. 3, odd-numbered terminals 21U1 to 21U9, 21V1 to 21V9, 21W1 to 21W9 and even-numbered terminals 21U2 to 21U8, 21V2 to 21V8 and 21W2 of the U-phase coil 20U, the V-phase coil 20V and the W-phase coil 20W. ~ 21W8 are arranged in a straight line, respectively.

(Explanation of tap switch 30)
As shown in FIG. 1, the tap switch 30 includes a tap selector 32 that selects a desired tap, and a switch switch 31 that switches the connection of an electric circuit by a plurality of switches.

(Explanation of tap selector 32)
The tap selector 32 includes U-phase switch side tap terminals 32U1 to 32U9, V-phase switch side tap terminals 32V1 to 32V9, W-phase switch side tap terminals 32W1 to 32W9, and U-phase tap lead plates 33U1 to 33U9, V. The phase tap lead plate 33V1 to 33V9 and the W phase tap lead plate 33W1 to 33W9 are provided.

First, the structure of the U-phase switch side tap terminal 32U1 and the U-phase tap lead plate 33U1 will be described as an example.
As shown in FIG. 4, the lower end of the U-phase tap lead plate 33U1 extending in the vertical direction is fixed to the U-phase coil-side tap terminal 21U1 of the U-phase coil 20U. The U-phase tap lead plate 33U1 is composed of, for example, a rigid plate-shaped member.

The coil side tap terminal 21U1 and the lower end of the tap lead plate 33U1 are fastened to the coil side terminal through holes 21U11, 21U12 and the tap lead plate side through holes 33U11, 33U12 through bolts B1 and B2 with nuts N1 and N2. It is fixed. A switch-side tap terminal 32U1 is formed in the shape of an eave at the upper end of the tap lead plate 33U1. That is, the switch side tap terminal 32U1 and the tap lead plate 33U1 are integrally formed.

The lower ends of the tap lead plates 33U2 to 33W9 are also fixed to the coil-side tap terminals 21U2 to 21W9, respectively. Further, the tap terminals 32U2 to 32W9 on the switch side are formed in an eaves shape at the upper ends of the tap lead plates 33U2 to 33W9.

Due to such a configuration, the switch side tap terminals 32U1 to 22W9 have the same odd-numbered 5 terminals for each of the U, V, and W phases as in the coil side tap terminals 21U1 to 21W9 shown in FIG. The four even-numbered terminals are arranged in a straight line on the front side, and the even-numbered four terminals are arranged in a straight line on the back side.

As described above, if a conventional cylindrical tap switcher is called a vertical type, in the tap switcher 30, the switcher side tap terminals 32U1 to 22W9 are arranged on a straight line in the left-right direction. Therefore, it can be said that it is a horizontal type. By making the tap switch 30 horizontal, the configuration can be simplified as compared with the case where the vertical tap switch is used. Further, since the tap switch 30 and the coil 20U and the like are arranged close to each other, the transformer device 1 can be miniaturized as a whole. Further, as compared with the case where a lead wire is used for connecting the coil side tap terminal 21U1 or the like and the switch side tap terminal 32U1 or the like, the wiring inside the transformer device 1 is less likely to be complicatedly entangled, so that the entire transformer device 1 is not entangled. It is easy to inspect, route wiring, change and replace connections.

The tap selector 32 includes U-phase contacts 32U12 and 32U22, V-phase contacts 32V12 and 32V22, and W-phase contacts 32W12 and 32W22, respectively, for the U-phase, V-phase, and W-phase. Note that FIG. 4 illustrates only the U-phase contactor 32U12.

The U-phase contact 32U12 is short-circuited with the U-phase switch terminal 31U22, the U-phase contact 32U22 is short-circuited with the U-phase switch terminal 31U12, and the U-phase switch terminal 31U32 is short-circuited via the current limiting resistor 31U4. Is connected to. The V-phase contact 32V12 is short-circuited with the V-phase switch terminal 31V22, the V-phase contact 32V22 is short-circuited with the V-phase switch terminal 31V12, and the V-phase switch terminal 31V32 is short-circuited via the current limiting resistor 31V4. Is connected to. The W-phase contact 32W12 is short-circuited with the W-phase switch terminal 31W22, the W-phase contact 32W22 is short-circuited with the W-phase switch terminal 31W12, and the W-phase switch terminal 31W32 is short-circuited via the current limiting resistor 31W4. Is connected to.

5 (A) to 5 (E) are plan views showing the positional relationship between the U-phase contacts 32U12 and 32U22 and the U-phase switch side tap terminals 32U1 to 22U9. In addition, in FIGS. 5A to 5E, in order to show the positional relationship, the part of the U-phase contacts 32U12 and 32U22 that is shaded by the U-phase switch side tap terminals 32U1 to 22U9 is also shown by a solid line. .. As illustrated in FIGS. 5A to 5E, the U-phase contactor 32U12 is the lower surface of any one of the odd-numbered U-phase switch side tap terminals 32U1, 32U3, ..., 32U9 of the U-phase. Moves horizontally and vertically so that it can be contacted with. Similarly, the U-phase contactor 32U22 moves in the left-right direction and the up-down direction so as to be in contact with the lower surface of any one of the U-phase even-numbered U-phase switch side tap terminals 32U2, 32U4, 32U6, and 32U8. Similarly, the V-phase contactor 32V12 moves in the left-right direction and the up-down direction so as to be able to contact the odd-numbered V-phase switch side tap terminals 32V1, 32V3, ..., 32V9 on the front side, and the V-phase contactor 32V22. Moves in the left-right direction and the up-down direction so as to be able to contact the even-numbered V-phase switch side tap terminals 32V2, 32V4, ..., 32V8 on the back side. Further, the W-phase contactor 32W12 moves in the left-right direction and the up-down direction so as to be able to contact the odd-numbered W-phase switch side tap terminals 32W1, 32W3, ..., 32W9 on the front side, and the W-phase contactor 32W22 , The even-numbered W-phase switch side tap terminals 32W2, 32W4, ..., 32W8 move in the left-right direction and the up-down direction so as to be in contact with each other.
The operations of the U-phase contacts 32U12, 32U22, the V-phase contacts 32V12, 32V22, and the W-phase contacts 32W12, 32W22 will be described later.

(Explanation of switching switch 31)
FIG. 6 is a schematic plan view of the switching switch 31. The switching switch 31 is a device that connects and disconnects a high-voltage and large-current circuit at high speed and reliably at the time of tap switching.
As shown in FIG. 6, the switching switch 31 includes three U-phase switches 31U1, 31U2 and 31U3, three V-phase switches 31V1, 31V2 and 31V3, and three W-phase switches 31W1, 31W2 and 31W3. And a first cam mechanism 50 for opening and closing these switches.

The U-phase switch 31U1 is a tubular vacuum valve (high-pressure AC load switch), a rod extending inward from the vacuum valve, a compression coil spring (not shown) wound around the rod, and a compression coil spring. It is equipped with an urged U-phase switch cam follower 52U1.
Further, one end of the U-phase switch 31U1 is electrically connected to the U-phase switch terminal 31U11, and the other end is electrically connected to the U-phase switch terminal 31U12.

When the U-phase switch cam follower 52U1 is moved toward the front by the first cam mechanism 50, the rod of the U-phase switch 31U1 is also pushed toward the front, and the internal contacts shown by the broken lines come into contact with each other to bring the U-phase switch 31U1. The two U-phase switch terminals 31U11 and 31U12 are electrically connected (closed). On the contrary, when the U-phase switch cam follower 52U1 moves to the back, the rod of the U-phase switch 31U1 is also pulled out toward the back, the internal contacts shown by the broken lines are separated, and the two U-phase switch terminals 31U11 and 31U12 are separated. Is an electrically disconnected state (open).

The other U-phase switches 31U2 and 31U3, the V-phase switches 31V1 to 31V3, and the W-phase switches 31W1 to 31W3 are also electrically opened and closed in the same manner.
These switches 31U1 to 31W3 and the like are arranged parallel to each other on one horizontal plane with the vacuum valve tilted sideways so that the axes of the pipe and shaft of the vacuum valve face in the front-rear direction. There is.

Between the U-phase switch terminals 31U32 and 31U12 of the U-phase switch 31U3, between the V-phase switch terminals 31V32 and 31V12 of the V-phase switch 31V3, and with the W-phase switch terminal 31W32 of the W-phase switch 31W3. A U-phase limiting current resistor 31U4, a V-phase limiting current resistor 31V4, and a W-phase limiting current resistor 31W4 are connected to the 31W12, respectively.

The U-phase switch terminals 31U11, 31U21, and 31U31 are electrically connected to each other, correspond to the U-phase input end, and are connected to the input terminal 71 via a copper wire.
On the other hand, the U-phase switch terminal 31U12 is connected to the U-phase contactor 32U22 for even-numbered tap terminals via a copper wire. Further, the U-phase switch terminal 31U22 is connected to the U-phase contactor 32U12 for the odd-numbered tap terminal via a copper wire.

As a result, for example, when the U-phase switch 31U1 is closed, the input terminal 71 and the U-phase contactor 32U22 are electrically connected, and when the U-phase switch 31U1 is opened, the input terminal 71 and the U-phase contactor 32U22 are electrically connected. Is cut off.

Similarly, the V-phase switches 31V1 to 31V3 are connected to the input terminal 71, the V-phase quadrant resistor 31V4, and the V-phase contacts 32V12 and 32V22. Further, the W-phase switches 31W1 to 31W3 are connected to the input terminal 71, the W-phase quadrant resistor 31W4, and the W-phase contacts 32W12 and 32W22.

In order to open and close the switches 31U1 to 31W3, the linear cam 51 reciprocates by one pitch in the left-right direction as illustrated in FIG.
FIG. 7A shows a change in the opening / closing state of the U-phase switches 31U1 to 31U3 corresponding to the U-phase switches cam followers 52U1, 52U2, and 52U3, respectively, when the tap is switched. In FIGS. 7A to 7E, only the U-phase components are illustrated, and the U-phase switch cam followers 52U1 to 52U3 and the U-phase switches 31U1 to 31U3 corresponding to these cam followers are shown in (b), respectively. This will be described as (a) and (r).
The horizontal axis of FIG. 7A is time, and the switches (a), (r), and (b) in the process of changing from the state where the odd-numbered taps are selected to the state where the even-numbered taps are selected. Indicates the open (OFF) and closed (ON) states of.
In the initial state, an odd number of taps are selected, the switch (a) is closed, and the switches (b) and (r) are open, as shown in FIGS. 7A and 7B. Subsequently, as shown in FIGS. 7A and 7C, an intermediate state 1 occurs in which the switch (r) is also closed while the switch (a) is closed, and only the switch (b) is open. After a further period of time, as shown in FIGS. 7 (A) and 7 (D), the switch (b) remains open, the switch (r) remains closed, and the switch (a) is open. 2 occurs. After these intermediate states 1 and 2, finally, as shown in FIGS. 7 (A) and 7 (E), the switches (b) and (r) are closed and (a) is open, even taps. Reach the selected state of. In the process of changing from FIG. 7B to FIG. 7E, the linear motion cam 51 is moving in the −X direction.
In the process from the state where the even number tap is selected to the state where the odd number tap is selected, the linear cam 51 moves in the + X direction, and the open / closed states of the switches (b), (a), and (r) are opened and closed. The change in is the opposite of that described above.

Hereinafter, the first cam mechanism 50 will be described in detail.
As shown in FIG. 6, the first cam mechanism 50 is a linear cam 51 that moves left and right, and a cylinder that is pressed against a side surface having an uneven portion provided on the front side of the linear cam 51. It includes U-phase switch cam followers 52U1, 52U2, 52U3, V-phase switch cam followers 52V1, 52V2, 52V3, and W-phase switch cam followers 52W1, 52W2, 52W3, which are cam followers having a shape.

The linear motion cam 51 includes a side surface having a convex portion protruding toward the front side. Corresponding to the fact that the switches 31U1 to 31W3 are regularly arranged in the order of U phase, V phase, and W phase, the unevenness of the side wall of the linear motion cam 51, that is, the peaks and valleys of the linear motion cam 51 are U phase and V. It is formed in a shape equal to a relatively equal position between the phase and the W phase.

The U-phase switch cam followers 52U1 to 52U3, the V-phase switch cam followers 52V1 to 52V3, and the W-phase switch cam followers 52W1 to 52W3 are U-phase switches 31U1 to 31U3, V-phase switches 31V1 to 31V3, and W-phase, respectively. It is connected to the other rod of the switches 31W1 to 31W3.
The configuration of the cam followers 52U1 to 52W3 will be described in more detail by taking the U-phase switch cam follower 52U1 as an example. As shown in FIGS. 8A to 8C, the U-phase switch cam follower 52U1 can be rotated into a U-phase cam follower bracket 53U1 having an L-shaped cross section when viewed from the left and right, and a U-phase cam follower bracket 53U1. It is provided with a U-phase cam follower 53U2 which is axially supported by the cam and rolls on the cam surface of the linear cam 51. Further, the U-phase cam follower bracket 53U1 includes a horizontal plate 53U11 and a vertical plate 53U12.

As shown in FIG. 8C, the lower surface of the horizontal plate 53U11 has a slight clearance CL with the upper surface of the linear motion cam 51. Further, the U-phase cam follower 53U2 has a cylindrical shape, is rotatably supported by the horizontal plate 53U11, and can roll along the cam surface of the linear cam 51.

The horizontal plate 53U11 of the U-phase cam follower bracket 53U1 is formed so as to project to the back side so as to have a sufficient depth. Therefore, whether the U-phase switch cam follower 52U1 or the like is in the front position as shown in FIG. 8 (A) or in the back position as shown in FIG. 8 (B), FIG. 8 (C) shows. As shown, the horizontal plate 53U11 of the U-phase cam follower bracket 53U1 maintains a sufficient overlap OL with the upper surface of the linear cam 51 in the vertical direction. With such a configuration, the U-phase switch cam follower 52U1 moves smoothly along the cam surface of the linear motion cam 51.

Since the linear motion cam 51 is processed into a common shape in each phase as described above and the switch cam followers 52U1 to 52W3 are regularly arranged, for example, the U-phase switch cam follower 52U1 and the V-phase switch cam follower The 52V1 and the W-phase switch cam follower 52W1 are synchronously pushed out toward the front or pulled back. Similarly, the U-phase switch cam follower 52U2, the V-phase switch cam follower 52V2, the W-phase switch cam follower 52W2, the U-phase switch cam follower 52U3, the V-phase switch cam follower 52V3, and the W-phase switch cam follower 52W3 are also synchronized. It protrudes toward you or pulls it toward you.

The linear cam 51 is a square bar-shaped member extending to the left and right, and a side wall having three portions protruding toward the front corresponds to a driving node as a cam mechanism. Further, the U-phase switch cam follower 52U1, the V-phase switch cam follower 52V1 and the W-phase switch cam follower 52W1 correspond to the driven clause as the cam mechanism.

Note that, unlike those shown in FIGS. 7B to 7E, the switches are arranged in the order of 31U1, 31U3, 31U2, or 31U2, 31U3, 31U1 and connected to the current limiting resistor 31U4. It is conceivable to place the vessel 31U3 between the other two switches 31U1 and 31U2. However, with such an arrangement, as illustrated in FIGS. 9A and 9B, the length of the linear motion cam 51 is longer than that shown in FIGS. 6 and 7B to 7E. Becomes longer. Therefore, the structure shown in FIGS. 6 and 7 (B) to 7 (E) can make the switching switch 31 more compact.

(Explanation of drive mechanism 40)
The reciprocating motion of the linear cam 51 is performed by the drive mechanism 40.
Therefore, next, the drive mechanism 40 will be described with reference to FIGS. 10A to 10E.
The drive mechanism 40 is mechanically connected to a drive shaft 41 that receives a rotational force from the outside by a motor M (not shown), a crank mechanism portion 42 that converts the rotational movement of the drive shaft 41 into a linear motion, and a crank mechanism portion 42. A slider 46 that moves along the slide rack 47 in the horizontal direction, and a first cam mechanism 50 that is mechanically connected to the slider 46 and causes the switching switch 31 to perform a predetermined operation are provided. The linear cam 51 is connected to the slider 46.

The transformer device 1 monitors the output voltage through, for example, a voltage transformer (not shown), and when the difference between the output voltage and the target voltage exceeds a certain value, the output voltage is brought close to the target voltage. Therefore, a current is passed through the motor M to rotate it to operate the drive mechanism 40, and a tap switching operation is performed.

FIG. 10A is a plan view of the crank mechanism portion 42. One end of the crank mechanism 42 is fixed to the drive shaft 41, and one end is connected to the first link 43a that can rotate 360 ° around the drive shaft 41 and the other end of the first link 43a. A second link 43b and a first crank 44a swingably connected to the other end of the second link 43b are provided. In FIG. 10A, the first link 43a faces the + X direction, and the longitudinal direction of the first link 43a and the longitudinal direction of the second link 43b are parallel. The rotation angle of the drive shaft 41 at this time is set to 0 °. Further, in the following description, the rotation angle of the drive shaft 41 (= or the rotation angle of the first link 43a) represents a value when measured clockwise.
The first crank 44a is swingably connected to the other end of the second link 43b at an intermediate portion thereof, and one end of a coil spring 45, which will be described later, is suspended at one end of the first crank 44a.

The crank mechanism portion 42 further includes a fan-shaped gear 42a and a slide rack 47 that meshes with the teeth of the fan-shaped gear 42a and can move in the left-right direction. The fan-shaped gear 42a is connected to one side of the fan so that the other end of the first crank 44a can rotate about the rotation axis of the fan-shaped gear 42a. On the fan-shaped gear 42a, a second crank 44b whose one end is rotatably connected to the central portion of the fan-shaped gear 42a and a second crank 44b are arranged so as to sandwich the second crank 44b, and the movement range of the second crank 44b. Two stoppers 44c and 44d, which regulate the above, are arranged. Spring locking portions are provided at one end of the first crank 44a and the other end of the second crank 44b, respectively, and both ends of the coil spring 45 are fixed to these two spring locking portions. ing. As a result, the coil spring 45 is stretched between one end of the first crank 44a and the other end of the second crank 44b. As a result, one end of the first crank 44a and the other end of the second crank 44b receive forces in the direction of pulling each other on the extension shaft of the coil spring 45.

The fan-shaped gear 42a is formed in a shape obtained by cutting out a constant angle θ1 of the spur gear. For example, in the state of FIG. 10A, the fan-shaped gear 42a is formed with a part of the left end of a plurality of teeth of the fan-shaped gear 42a. A part of the slide rack 47 on the front left side of the plurality of teeth is in mesh with each other. At this time, the linear cam 51 is at the position shown in FIG. 7B, and the odd-numbered taps are selected.

Hereinafter, the operation of the crank mechanism portion 42 will be described with reference to FIGS. 10 (B) to 10 (E) showing important parts for understanding the operation of the crank mechanism portion 42.

FIG. 10B is an explanatory view of the crank mechanism portion 42 in a state where the odd-numbered taps are selected, and the rotation angle of the drive shaft 41 is 0 °. At this time, the slide rack 47 is in the state closest to the right side of the drawing, and the vicinity of the left end of the fan-shaped gear 42a meshes with the teeth of the slide rack 47. Further, the second crank 44b is in contact with the stopper 44d.
When the drive shaft 41 rotates 90 ° clockwise in the state of FIG. 10B, the first link 43a also rotates 90 ° as shown in FIG. 10C. The second link 43b is driven by this, and one end of the first crank 44a moves toward the front. On the other hand, the fan-shaped gear 42a and the second crank 44b do not rotate significantly while the second crank 44b is in contact with the stopper 44d. However, since the distance between one end of the first crank 44a and the other end of the second crank 44b becomes large, elastic energy is stored in the coil spring 45.
When the drive shaft 41 is further rotated to a specific angle θ2, the first crank 44a and the second crank 44b are aligned as shown in FIG. 10 (D), and the coil spring 45 is shown in FIG. 10 (C). It stretches further than the state in which it is in a state where it stores more elastic energy.
When the drive shaft 41 continues to rotate clockwise from the angle θ2, the first crank 44a and the second crank 44b exceed the dead center, and the elastic force of the coil spring 45 causes the second crank 44b to become the stopper 44d. It moves from the abutted state to a state where it is urged in the direction indicated by the arrow in FIG. 10 (D) counterclockwise and instantly abuts on the stopper 44c. At the same time, the fan-shaped gear 42a also rotates counterclockwise to the left by receiving a leftward force from the stopper 44c, the meshing slide rack 47 moves vigorously to the left (-X direction), and the slider 46 moves to the left. The linear motion cam 51 is in the state shown in FIG. 7 (E).
When the drive shaft 41 is further rotated, the rotation angle of the drive shaft 41 becomes 180 °. This position is a steady position with an even number of taps selected.
When the drive shaft 41 is further rotated, the fan-shaped gear 42a rotates clockwise when the dead center is exceeded in the same process as described above, the second crank 44b separates from the stopper 44c, and reaches the stopper 44d. Instantly rotate and touch. As a result, the slide rack 47 moves to the right, the slider 46 moves to the right (+ X direction), and the linear cam 51 is in the state shown in FIG. 7B.
When the drive shaft 41 is further rotated, the crank mechanism portion 42 returns to the state shown in FIG. 10B.
In this way, each time the drive shaft 41 rotates 180 °, the slide rack 47 alternately moves left and right at high speed. Due to the high-speed movement of the slide rack 47, the linear cam 51 moves at high speed, and the open / closed state of the switches 31U1 to 31W3 is switched at high speed. As described above, the second crank 44b is in contact with either the stopper 44c or 44d before and after the dead center is exceeded, and the stoppers 44c and 44d are contacted only at the moment when the dead center is exceeded. Move fast between.

(Explanation of the structure of the second cam mechanism 60)
As shown in FIGS. 5 and 11A, the drive mechanism 40 includes a second cam mechanism 60 for driving the contacts 32U12 and 32U22, 32V12 and 32V22, 32W12 and 32W22.
As shown in FIG. 11A, the second cam mechanism 60 includes a first cam guide 61a and a second cam guide 61b having shapes facing each other on the front side and the back side of the tap selector 32. , A first rack 63a and a second rack 63b.
The first cam guide 61a is configured to move the contacts 32U22, 32V22, 32W22 on the back side in the lateral direction, and the cam grooves 64U, 64V, 64W are formed as shown in FIG. 11B. There is.
The first rack 63a moves along the first cam guide 61a. Cam followers 62U, 62V, 62W attached to the contacts 32U22, 32V22, 32W22 on the back side are attached to the first rack 63a. The cam followers 62U, 62V, and 62W are inserted into the cam grooves 64U, 64V, and 64W, respectively. Therefore, with the lateral movement of the first rack 63a, the cam followers 62U, 62V, and 62W move laterally while moving up and down along the cam grooves 64U, 64V, and 64W, respectively, and this movement occurs. The contacts 32U22, 32V22, and 32W22 on the back side also move accordingly.
The second cam guide 61b is configured to move the contacts 32U12, 32V12, 32W12 on the front side in the lateral direction, and cam grooves 64U, 64V, 64W for each phase are formed. The second rack 63b moves along the second cam guide 61b. A cam follower attached to the contacts 32U12, 32V12, and 32W12 on the front side is attached to the second rack 63b. Each cam follower 62U, 62V, 62W is inserted into a corresponding cam groove, respectively. Therefore, with the lateral movement of the second rack 63b, the cam followers 62U, 62V, 62W move laterally while moving up and down along the cam grooves 64U, 64V, 64W, and in response to this movement. , The contacts 32U12, 32V12, 32W12 on the front side also move.

Further, the tap selector 32 includes, as gears, a first gear 65a, a second gear 65b, and a third gear 65c from the side closer to the power source. These gears are spur gears, and the first gear 65a and the second gear 65b, and the second gear 65b and the third gear 65c mesh with each other. The first gear 65a is driven by the drive shaft 41 described above.

The first gear 65a, the second gear 65b, and the third gear 65c are arranged on a common plane. Further, the rotation axes of these gears are on a plane parallel to the inner wall of the first rack 63a and the inner wall of the second rack 63b.

To the right of the third gear 65c, a fifth gear 65e, a fourth gear 65d, and a first general gear 66a are arranged in this order from the top. These gears have a common axis of rotation, which is on a plane parallel to the central plane CP, which is defined as a plane in which the distance from the first rack 63a and the distance from the second rack 63b are equal. However, the fifth gear 65e is arranged so as to have a rotation axis on a plane located in front of the central plane CP so as to mesh with the second rack 63b.

The fourth gear 65d, the first general gear 66a and the fifth gear 65e have a common axis of rotation, but the fourth gear 65d can rotate independently of the fifth gear 65e and the first general gear 66a. The fifth gear 65e and the first generator gear 66a are formed so as to rotate in conjunction with each other.

To the right of the fourth gear 65d, a sixth gear 65f and a chipped disk 66c are arranged in this order from the top. The sixth gear 65f and the chipped disk 66c have a common rotation axis, and this rotation axis is on the central plane CP.

The sixth gear 65f is formed so as to rotate in conjunction with the chipped disk 66c. Further, the sixth gear 65f is arranged so as to mesh with the fourth gear 65d.

To the right of the sixth gear 65f, a seventh gear 65g and a second generator gear 66b are arranged in this order from the top. The seventh gear 65g and the second generator gear 66b have a common rotation axis, which is on a plane parallel to the central plane CP, but the seventh gear 65g meshes with the first rack 63a. As shown above, it is arranged on a plane located behind the CP.

The seventh gear 65g has a rotation axis common to that of the second Geneva gear 66b, and is formed so as to rotate in conjunction with each other.
The first general gear 66a and the second general gear 66b are machined into the same shape and each has six slots, but these slots are not provided at equal intervals and are divided into seven equal parts in the circumferential direction. It is provided at a radial position.
The chipped disk 66c includes one pin 66d and is formed in a shape that can be smoothly fitted into the slots provided in the first generator gear 66a and the second generator gear 66b.

The first rack 63a and the second rack 63b are both arranged at the same height. Further, the fifth gear 65e and the seventh gear 65g are both provided at the same height.

(Explanation of operation of the second cam mechanism 60)
With the structure of the second cam mechanism 60 described above, the U-phase contacts 32U11 and 32U12 are moved in the left-right and up-down directions according to the positions of the cam follower 62U fitted in the cam groove 64U in the left-right and up-down directions. It is possible to change which of the switch side tap terminals 32U1 to 22U9 is in contact. Hereinafter, taking the case of changing the U-phase tap as an example, the positional relationship between the first cam guide 61a of the tap selector 32, the cam follower 62U, the U-phase contacts 32U12, 32U22, and the U-phase switch side tap terminals 32U1 to 22U9. Will be described with reference to FIGS. 12 (A) and 12 (B).

12 (A) and 12 (B) show partially enlarged views of the tap selector 32 when viewed from the outside to the inside of the tap selector 32. As shown in FIG. 12A, the U-phase contactor 32U22 is in contact with the U-phase switch side tap terminal 32U2. When the U-phase contactor 32U22 moves to the right, as shown in FIG. 12B, the cam follower 62U fitted in the cam groove 64U moves downward, so that the U-phase contactor 32U22 is tapped on the switch side. Move away from terminal 32U2. Further, when the U-phase contactor 32U22 moves to the right, the U-phase contactor 32U22 moves upward and comes into contact with the U-phase switch side tap terminal 32U4. In this way, the U-phase switch side tap terminal 32U2 moves up and down according to the shape of the groove of the cam groove 64U when moving in the left-right direction, and therefore comes into contact with the adjacent switch side tap terminals 32U2 and 32U4 at the same time. Never. Therefore, the distance between the adjacent tap terminals on the switch side can be made shorter than the width of the U-phase contactor 32U22, and the overall size of the tap selector 32 is reduced as compared with the case where no vertical movement is involved. be able to.

The U-phase contactor 32U12, the contactor 32V22 of another phase, and the like arranged on the front side also perform the same operation as the U-phase contactor 32U22 described above.

Due to such a contact structure, the U-phase contactor 32U12 is in U-phase contact with any of the U-phase switch side tap terminals 32U1, 32U3, ..., 32U9 having an odd number at the end, which are arranged in front. The child 32U22 can be connected only to any one of the U-phase switch side tap terminals 32U2, 32U4, ..., 32U8 having an even number at the end, which are arranged at the back. Further, there are similar restrictions on the V phase and the W phase.

Next, the positional relationship of the contacts 32U12 to 32W22 in the tap selector 32 will be described with reference to FIGS. 5A to 5E. 5 (A) to 5 (E) are schematic plan views showing the positional relationship between the U-phase contacts 32U12 and 32U22 and the U-phase switch side tap terminals 32U1 to 22U9. For the purpose of explaining the positional relationship, the size and shape of the contacts are shown in a simplified manner. It is a figure. Further, 1 to 9 in the figure represent U-phase switch side tap terminals 32U1 to 22U9, respectively.

First, a case of switching from a tap with a small number to a tap with a large number will be described.
FIG. 5A shows a state in which the first tap is selected. The U-phase contactor 32U12 is located directly below the U-phase switch side tap terminal 32U1 and is in contact with the U-phase switch side tap terminal 32U1. The U-phase contactor 32U22 is located directly below the U-phase switch side tap terminal 32U2 and is in contact with the U-phase switch side tap terminal 32U2. In this state, when the tap is switched from No. 1 to No. 2, the U-phase contacts 32U12 and 32U22 are not moved in either the left-right direction or the up-down direction.

FIG. 5B shows a state in which the tap is being switched from No. 2 to No. 3. In this case, the U-phase contactor 32U12 is moved to the right from the U-phase switch side tap terminal 32U1 to 32U3. At this time, the U-phase contactor 32U12 is moved downward by the second cam mechanism 60 so as not to come into contact with any U-phase switch side tap terminal. The U-phase contactor 32U22 is located directly below the U-phase switch side tap terminal 32U2 and maintains a state of being in contact with the U-phase switch side tap terminal 32U2.

FIG. 5C shows a state in which the third tap is selected. The U-phase contactor 32U12 is located directly below the U-phase switch side tap terminal 32U3 and is in contact with the U-phase switch side tap terminal 32U3. The U-phase contactor 32U22 is located directly below the U-phase switch side tap terminal 32U2 and is in contact with the U-phase switch side tap terminal 32U2.

FIG. 5D shows a state in which the tap is being switched from No. 3 to No. 4. In this case, the U-phase contactor 32U22 is moved to the left from the U-phase switch side tap terminal 32U2 toward 32U4. At this time, the U-phase contactor 32U22 is moved downward by the second cam mechanism 60 so as not to come into contact with any U-phase switch side tap terminal. The U-phase contactor 32U12 is located directly below the U-phase switch side tap terminal 32U3 and maintains a state of being in contact with the U-phase switch side tap terminal 32U3.

FIG. 5 (E) shows a state in which the fourth tap is selected. In this case, the U-phase contactor 32U12 is located directly below the U-phase switch side tap terminal 32U3 and maintains a state of being in contact with the U-phase switch side tap terminal 32U3. The U-phase contactor 32U22 is located directly below the U-phase switch side tap terminal 32U4 and is in contact with the U-phase switch side tap terminal 32U4.

Next, a case of switching from a tap with a large number to a tap with a small number will be described.
As shown in FIG. 5 (E), the U-phase contactor 32U12 is in contact with the U-phase switch side tap terminal 32U3, and the U-phase contactor 32U22 is in contact with the U-phase switch side tap terminal 32U4. In this case, when the tap is switched from No. 4 to No. 3, the U-phase contacts 32U12 and 32U22 do not move in either the left-right direction or the up-down direction.

FIG. 5D shows a state in which the tap is being switched from No. 3 to No. 2. In this case, the U-phase contactor 32U22 is moved to the right from the U-phase switch side tap terminal 32U4 toward 32U2, and is not brought into contact with either the U-phase switch side tap terminals 32U4 and 32U2. When this switching is completed, the state shown in FIG. 5C is obtained.

FIG. 5B shows a state in which the tap is being switched from No. 2 to No. 1. The U-phase contactor 32U12 is moved to the left from the switch side tap terminal 32U3 toward 32U1 and is not brought into contact with either the switch side tap terminal 32U3 or 32U1. When this switching is completed, the state shown in FIG. 5 (A) is obtained.

In a similar manner, the odd-numbered taps are switched to the even-numbered taps, and the even-numbered taps are switched to the odd-numbered taps.

The horizontal movement of the movable contact assembly 64 is controlled by the engagement between the chipped disk 66c and the first generator gear 66a and the engagement between the chipped disk 66c and the second generator gear 66b. Further, as described above, the vertical movement of the movable contact assembly 64 is controlled by the fitting position of the cam followers 62U, 62V, 62W in the cam grooves 64U, 64V, 64W. Therefore, since the movable contact assembly 64 is moved in the left-right direction and the vertical direction at the same time, the size of the tap selector 32 can be reduced as compared with the case where the second cam mechanism 60 is not used. ..

(Explanation of cooperation operation between the switching switch 31 and the tap selector 32)
The switching switch 31 and the tap selector 32 operate in the drive mechanism 40 in mechanically interlocking with each other via the drive shaft 41.
When the drive shaft 41 rotates, the switching switch 31 performs the above-mentioned switching operation according to the rotation direction of the drive shaft 41 and the state of the switching switch 31 at that time.
At the same time, when the drive shaft 41 rotates, the tap selector 32 performs the above-mentioned tap selection operation according to the rotation direction of the drive shaft 41 and the state of the tap selector 32 at that time.
In this way, by rotating the drive shaft 41, the switching switch 31 and the tap selector 32 are constructed so as to operate in cooperation with each other in order to operate the tap switching device 30.
For example, when changing the tap from 1 to 2, the first gear 65a does not receive the driving force from the drive shaft 41, and on the side of the tap selector 32, the movable contact assembly 64 changes the electrical connection. On the side of the switching switch 31, the circuit is opened and closed, and the tap is switched to a desired tap.
Next, when the tap is changed from 2 to 3, the first gear 65a receives a driving force from the drive shaft 41 and rotates clockwise, and on the side of the switching switch 31, the contact in the tap selector 32. Since there is a change in the electrical connection between the switch and the contactor, the switching switch 31 opens and closes and replaces the circuit so that the connection can be changed smoothly.

The realization of smooth tap selection will be described from the viewpoint of the electric circuit with reference to FIGS. 13A to 13C.
As shown in FIG. 14, the drive shaft 41 is appropriately driven by the motor driver 102 that drives the motor 103 according to the controller 101 that detects the load state and outputs the control signal of the motor and the control signal from the controller 101. To.
The circuit diagram when the tap 3 is selected is shown in FIG. 13 (A). At this time, the linear motion cam 51 is in the state shown in FIG. 7B, the U-phase switch 31U2 (a) is closed, and the U-phase switches 31U1 (b) and 31U3 (r) are open. Further, the slide rack 47 connected to the linear motion cam 51 is in a state of being slid to the right end shown in FIG. 7B. At this time, the contactor is in the state shown in FIG. 5 (C).

The controller 101 controls the motor via the motor driver in order to switch the tap 3 to the tap 4, and rotates the drive shaft 41 by 180 °. As a result, the first rack 63a moves one pitch in the −X direction via the gear train. Due to this movement, the contactor 32U22 on the back side moves away from the tap terminal 32U2 as shown in FIGS. 5 (D) and 12 (B) according to the shape of the cam groove 64U. Further, the changer side contactor 32U22 changes to the state shown in FIG. 5 (E) in contact with the tap terminal 32U4.
Further, the rotation of the drive shaft 41 causes the crank mechanism portion 42 to operate, and the slide rack 47 and the linear cam 51 connected to the slide rack 47 move from the position shown in FIG. 7 (B) to the position shown in FIG. 7 (E). In the process of doing so, the intermediate state 1 shown in FIG. 7C is generated. Therefore, as shown in FIG. 13B, a state of being connected to both the tap 3 and the tap 4 occurs for a moment. However, since it is only connected to the tap 4 via the current limiting resistor 31U4 connected in series, the change in the input current due to the connection of the tap 4 is mitigated, and the output voltage and the output current are significantly changed. Does not occur.

Subsequently, the linear motion cam 51 changes to the intermediate state 2 shown in FIG. 7 (D), the U-phase switch 31U2 corresponding to the U-phase switch cam follower 52U2 opens, and the contactor 32U12 on the front side is electrically insulated. Will be done. As a result, only the U-phase switch 31U3 corresponding to the U-phase switch cam follower 52U3 is closed, and the state of being connected to the tap 4 via the current limiting resistor 31U4 occurs for a short time. The resistance value and capacitance of the current limiting resistor 31U4 are set so as to withstand the current in the intermediate state 2 of FIG. 7 (D).

Further, when the state is changed to the state shown in FIG. 7 (E), as shown in FIG. 13 (C), the input voltage is directly applied to the tap 4, and the tap change is completed.

In this way, the tap selector 32 selects the desired taps for each of the U, V, and W phases, and the switching switch 31 is newly selected from the taps that have been connected so far even in the load state. Switch the connection to the tap.

In the transformer device 1, the switching switch 31 and the tap selector 32 are separately provided, and by combining the respective operations, it is not necessary to prepare the switching switch 31 for the number of taps. Further, since the switching operation by the switching switch 31 is performed immediately and smoothly by the drive mechanism 40, the fluctuation of the voltage and the current at the time of tap switching is also short and smooth.

As described above, the transformer device 1 according to the present embodiment includes a shunt winding W wound inside and a series winding P composed of a strip-shaped conductor wound outside the shunt winding W. Coil 20U to 20W, coil side tap terminals 21U1 to 21W9 regularly arranged linearly on one surface of the coil 20U to 20W, and connected to a plurality of upper portions of the strip-shaped conductor constituting the series winding P. A transformer including a tap lead wiring 26 extending over one surface of the coil 20U to 20W and connected to the coil side tap terminals 21U1 to 21W9.
Connect the corresponding ones of the coil side tap terminals 21U1 to 21W9 and the switch side tap terminals 32U1 to 22W9 arranged linearly and regularly, and the coil side tap terminals 21U1 to 21W9 and the switch side tap terminals 32U1 to 22W9. Tap switch 30 including tap lead plates 33U1 to 33W1
including.
According to this configuration, the coil-side tap terminals 21U1 to 21W9 and the switch-side tap terminals 32U1 to 22W9 are arranged at substantially opposite positions. Therefore, the lengths of the tap lead plates 33U1 to 33W1 for connecting the corresponding ones of the coil side tap terminals 21U1 to 21W9 and the switch side tap terminals 32U1 to 32W9 can be connected at almost the shortest distance, and the coils 20U to The configuration of 20W and the tap switch 30 can be simplified. Further, since the correspondence between the terminals 21U1 to 21W9 and 32U1 to 22W9 is clear, the connection work becomes easy.

Further, the upper portion of the series winding P and the coil side tap terminals 21U1 to 21W9 are connected by the tap lead wiring 26. Therefore, it is not necessary to extend the tap lead wiring 26 in the vertical direction, and it is possible to suppress variations in resistance due to the tap lead wiring 26.

In the above embodiment, the coil side tap terminals 21U1 to 21W9 and the switch side tap terminals 32U1 to 22W9 are arranged horizontally to face each other, but the positions of the coil side tap terminals 21U1 to 21W9 are switched. The orientation is arbitrary as long as the positions of the device-side tap terminals 32U1 to 22W9 are substantially opposite to each other and the contacts 32U12 to 32W22 can slide between the switcher-side tap terminals 32U1 to 22W9. For example, the switch side tap terminals 32U1 to 22W9 may be arranged horizontally aligned with the vertical plane.

In the above embodiment, the band-shaped wiring is used as the series winding P of the coil, but a normal wire-shaped winding may be used. Further, a band-shaped wiring may be used as the branch winding W of the coil.

In the above embodiment, the unevenness of the side wall of the linear motion cam 51 is formed in a shape equal to a relatively equal position among the U phase, the V phase, and the W phase. However, from the viewpoint of reducing the load on the drive mechanism 40, the unevenness of the side wall of the linear motion cam 51 may be formed at a relatively different position between the phases, or may be formed in a different shape.

The above description has been made on the premise of a three-phase AC transformer that transforms an AC voltage composed of U-phase, V-phase, and W-phase, but the embodiment of the present invention is not limited to this. The present invention may be applied to a single-phase transformer.
The transformer device or transformer of the present invention includes a configuration called a current transformer, a current transformer, or the like.
Further, the embodiments of the present invention may be applied to all electrical devices including a combination of a coil and a load tap switch.
An example of connecting the output terminal 72 to the switch side tap terminals 32U5, 32V5 and 32W5 corresponding to the 5th tap of the series winding is shown, but the switch side tap terminals 32U1 to 22U4 corresponding to the taps other than the 5th tap, It may be connected to 32U6 to 32U9, 32V1 to 32V4, 32V6 to 32V9, 32W1 to 32W4, 32W6 to 32W9.

In the above description, as a preferred embodiment, a drive mechanism for switching taps and the like have also been described in detail, but these configurations are arbitrary as long as the taps can be switched appropriately. For example, in the crank mechanism portion 42, the rotation axis of the fan of the fan-shaped gear 42a and the rotation axis of the first crank 44a are common, but the fan-shaped gear 42a and the first crank are not common so that these rotation axes are not common. 44a may be arranged.

The present invention allows for various embodiments and modifications without departing from the broad spirit and scope of the present invention. Moreover, the above-described embodiment is for explaining the present invention, and does not limit the scope of the present invention. That is, the scope of the present invention is indicated not by the embodiment but by the claims. Then, various modifications made within the scope of the claims and the equivalent meaning of the invention are considered to be within the scope of the present invention.

1 Transformer 10 Housing 20U U-Phase Coil 20V V-Phase Coil 20W W-Phase Coil 21U1, 21U2, 21U3, 21U4, 21U5, 21U6, 21U7, 21U8, 21U9 U-Phase Coil Side Tap Terminals 21U11, 21U12, 21U21, 21U22, 21U31, 21U32, 21U41, 21U42, 21U51, 21U52, 21U61, 21U62, 21U71, 21U72, 21U81, 21U82, 21U91, 21U92 U-phase coil side terminal through holes 21V11, 21V12, 21V21, 21V22, 21V31, 21V32, 21V41, 21V42, 21V51 21V52, 21V61, 21V62, 21V71, 21V72, 21V81, 21V82, 21V91, 21V92 V-phase coil side terminal through holes 21W11, 21W12, 21W21, 21W22, 21W31, 21W32, 21W41, 21W42, 21W51, 21W52, 21W61, 21W62, 21W71 21W72, 21W81, 21W82, 21W91, 21W92 W-phase coil side terminal through hole 21V1, 21V2, 21V3, 21V4, 21V5, 21V6, 21V7, 21V8, 21V9 V-phase coil side tap terminal 21W1, 21W2, 21W3, 21W4, 21W5, 21W6 , 21W7, 21W8, 21W9 W-phase coil side tap terminal 24 Insulation layer 25 Insulation layer 26 Tap lead wiring 30 Tap switch 31 Switching switch 31U1, 31U2, 31U3 U-phase switch 31V1, 31V2, 31V3 V-phase switch 31W1, 31W2, 31W3 W-phase switch 31U4 U-phase switch 31V4 V-phase switch 31W4 W-phase switch 31U11, 31U12, 31U21, 31U22, 31U31, 31U32 U-phase switch terminal 31V11, 31V12, 31V21, 31V22, 31V31, 31V32 V-phase switch terminal 31W11, 31W12, 31W21, 31W22, 31W31, 31W32 W-phase switch terminal 32 tap selector 32U1, 32U2, 32U3, 32U4, 32U5, 32U6, 32U7, 32U8, 32U9 U phase switching Instrument side tap terminal 32V1, 32V2, 32V3, 32V4, 32V5, 32V6, 32V7, 32V8, 32V9 V phase switch side tap terminal 32W1, 32W2, 32W3, 32W4, 32W5, 32W6, 32W7, 32W8, 32W9 W phase switcher side tap terminal 32U12, 32U22 U phase contacter 32V12, 32V22 V phase contacter 32W12, 32W22 W phase contacter 33U1, 33U2, 33U3, 33U4, 33U5, 33U6, 33U7 , 33U8, 33U9 U phase tap lead plate 33V1, 33V2, 33V3, 33V4, 33V5, 33V6, 33V7, 33V8, 33V9 V phase tap lead plate 33W1, 33W2, 33W3, 33W4, 33W5, 33W6, 33W7, 33W8, 33W9 Tap lead plate 33U11, 33U12, 33U21, 33U22, 33U31, 33U32, 33U41, 33U42, 33U51, 33U52, 33U61, 33U62, 33U71, 33U72, 33U81, 33U82, 33U91, 33U92 U-phase tap lead plate side through hole 33V11, 33V12, 33V21, 33V22, 33V31, 33V32, 33V41, 33V42, 33V51, 33V52, 33V61, 33V62, 33V71, 33V72, 33V81, 33V82, 33V91, 33V92 V-phase tap lead plate side through holes 33W11, 33W12, 33W21, 33W22, 33W31, 33W , 33W41, 33W42, 33W51, 33W52, 33W61, 33W62, 33W71, 33W72, 33W81, 33W82, 33W91, 33W92 W-phase tap lead plate side through hole 40 Drive mechanism 41 Drive shaft 42 Crank mechanism 42a Fan-shaped gear 43a First link 43b Second link 44a First crank 44b Second crank 44c Stopper 45 Coil spring 46 Slider 47 Slide rack 50 First cam mechanism 51 Linear cam 52U1, 52U2, 52U3 U-phase switch Cam follower 52V1, 52V2, 52V3 V-Phase Switch Cam Follower 52W1, 52W2, 52W3 W-Phase Switch Cam Follower 53U1 U-Phase Cam Follower Bracket 53U2 U-Phase Cam Follower 53V1 V-Phase Cam Follower Bracket 53V2 V-Phase Cam Follower 53W1 W-Phase Cam Follower 53W1 W-Phase Cam Follower 53W 2 Cam Mechanism 61a 1st Cam Guide 61b 2nd Cam Guide 62U, 62V, 62W Cam Follower 63a First Rack 63b Second Rack 64 Movable Contact Assembly 64U, 64V, 64W Cam Groove 65a First Gear 65b Second Gear 65c Third Gear 65d Fourth Gear 65e Second Gear 5 65f 6th gear 65g 7th gear 66a 1st Geneva Gear 66b 2nd Geneva Gear 66c Missing Disk 66d Pin 71 Input Terminal 72 Output Terminal 101 Controller 102 Motor Driver 103 Motor

Claims (7)

A coil provided with a winding, a coil-side tap terminal regularly arranged linearly on one surface of the coil, and the coil connected to a plurality of locations of the winding and extending over one surface of the coil. With a transformer, with lead wiring, connected to the side tap terminal,
A tap including a switch-side tap terminal that is regularly arranged linearly with the coil-side tap terminal, and a tap lead plate that connects the corresponding ones of the coil-side tap terminal and the switch-side tap terminal to each other. With a switch
Including transformers. One surface of the coil is composed of a surface facing the tap switch.
The transformer device according to claim 1. The coil-side tap terminals are composed of a plurality of groups including coil-side tap terminals arranged in a straight line.
The transformer device according to claim 1 or 2. The coil-side tap terminal and the switch-side tap terminal are arranged so as to face each other.
The transformer device according to any one of claims 1 to 3. At least a portion of the windings comprises a wound strip of wiring.
The lead wiring is connected to a side portion of the strip-shaped wiring on the switch side.
The transformer according to any one of claims 1 to 4. The coil is an autotransformer with series windings and shunt windings.
The lead wiring is connected to the series winding,
The transformer device according to any one of claims 1 to 5. The series winding and the branch winding are wound around a vertical axis.
The transformer device according to claim 6.

Images