JP2528636Y2 - Permanent current switch coil fixing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a permanent current switch used for a superconducting power storage system or the like.

2. Description of the Related Art In a superconducting power storage system, a permanent current switch having a special coil structure is interposed between superconducting coils.

FIG. 4 shows the basic configuration of this superconducting power storage system. In the figure, a superconducting coil 12 has a permanent current switch.
13 are connected in parallel to form a permanent current loop 14, whereby power is stored as magnetic field energy. The supply of energy to the superconducting power storage system and the extraction of energy from the system are performed with the permanent current switch 13 turned off.

In the superconducting power storage system as described above,
A switch using superconductivity is used as a permanent current switch.

The structure of the permanent current switch using this superconductivity is
This is illustrated in the figure. In FIG. 5, 15 is a coil bobbin, 16
Is a superconducting wire (coil) wound around a coil bobbin 15, 17
Is an insulation sheet that insulates between the laminated coils, 18 is an insulation sheet
A heater for switch on / off control provided on the coil via 17 is provided, and 19 is a mold (or a coil presser) for fixing the coil.

As shown in FIG. 6, the superconducting wire 16 wound around the coil bobbin 15 has a superconducting filament 16 inside a Cu-Ni alloy 16a.
The Cu-Ni alloy 16a
Has a higher electrical resistance than Cu used for a normal superconducting wire, and the resistance as a wire in a state of normal conduction is high and low. Therefore, the permanent current switch is connected to the heater 18.
The superconducting wire 16 is switched to the normal conducting state by heating, and the switch is turned off by bringing the wire into the high resistance state, and is switched off by canceling the heating of the heater 18 and bringing the superconducting wire 16 into the superconducting state. State.

Here, when the coil constituted by the superconducting wire 16 of the permanent current switch is excited, an electromagnetic force proportional to the product of the coil and the magnetic field generated in the coil acts on the superconducting winding of the coil. Therefore, as the size of the coil increases and its diameter and length increase, the generated magnetic field also increases, and the accumulated electromagnetic force also increases. Although this electromagnetic force increases with the coil length, the coil is fixed to the fixed position of the coil bobbin 15 in order to suppress the electromagnetic force that expands in the radial direction at this time and to prevent the winding from separating from the coil bobbin 15. Need to be implemented.

However, as shown in FIG. 3, the conventional coil fixing structure has a structure in which the coil is simply wound around the cylindrical coil bobbin and the coil end is fixed, so that the winding of the coil is slack and cheap. Therefore, the wire rod is easily displaced in the radial direction of the bobbin.

[Problems to be Solved by the Invention] In the conventional coil winding means in the permanent current switch as described above, the backlash of the winding machine and the loosening of the wire winding frame which is being tensioned are caused. The coil cannot be wound with a uniform tension, thus creating a gap between the coils. When an electric current is passed through a coil having a gap between the coils, there is a problem that the coil moves in the radial direction of the bobbin due to the action of the electromagnetic force due to the above-described reason, causing a quench.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a permanent current switch coil fixing device that can securely fix a coil to a fixed position of a bobbin with a simple structure in a permanent current switch coil structure. And

[Means for Solving the Problems] The present invention is to solve the above-mentioned conventional problems,
As shown in FIG. 1, a concave portion 4 is provided in the coil winding surface portion of the coil bobbin 1 along the axial direction, and a convex portion 5 is provided on an inner surface portion of the coil presser 2 corresponding to the concave portion 4.
After the coil 3 is wound by applying tension to the coil winding surface of the coil bobbin 1 and the coil 3 is tightened by the coil presser 2, the convex portion 5 of the coil presser 2 fixes the coil 3 to the recess of the coil bobbin 1 as shown in FIG. 4, the coil 3 is configured to have a coil fixing structure in which the tension is further applied to the coil 3 to firmly fix the coil 3 at a fixed position of the coil bobbin 1.

[Operation] As described above, the permanent current switch of the present invention applies tension to the coil 3 by the concave portion 4 of the coil bobbin 1 and the convex portion 5 of the coil presser 2, and fixes the coil 3 at a fixed position of the coil bobbin 1. Due to the fixed structure, even if there is a gap between the coils wound around the coil bobbin 1, the coil 3 can be firmly fixed at a fixed position of the coil bobbin 1, whereby the coil wire moves and quench due to the action of the electromagnetic force. Inconveniences can be reliably avoided, and highly reliable persistent current switch operation can be maintained.

[Embodiment] An embodiment of the present invention will be described below with reference to FIG. 1 and FIG.

In the drawing, reference numeral 1 denotes a coil bobbin on which the coil 3 is wound, and concave portions 4, 4,... Extending along the axial direction are provided at a plurality of positions (four here) on the coil winding surface. The chamfers (R) of the recesses 4, 4,... Are chamfered so that the coil 3 is not damaged when the coil 3 is pressed by the coil presser. Reference numeral 2 denotes a coil presser that fixes and protects the coil 3 on the coil bobbin 1. The inner surface is provided with protrusions 5, 5,... Corresponding to the recesses 4, 4,. Here, the coil presser 2 has a four-divided structure, but is not limited to this, and may have another divided structure.

The coil 3 is wound around the coil winding surface of the coil bobbin 1 while applying tension. After winding the coil 3 on the coil winding surface of the coil bobbin 1, the coil 3 is tightened by the coil presser 2, as shown in FIG. By the tightening of the coil 3 by the coil presser 2, the protrusions 5, 5,...
, And further apply tension to the coil 3 to eliminate a gap between the coils and firmly fix the coil 3 at a fixed position of the coil bobbin 1.

With such a coil fixing structure, even if the coil 3 initially wound on the coil bobbin 1 has a gap, slack, or the like, the coil 3 is fixed to the concave portion 4 of the coil bobbin 1 by the convex portions 5, 5,. , 4,..., Tension can be applied to the coil 3 so that the coil 3 can be firmly fixed at the bobbin fixed position. There is no quench.

[Effects of the Invention] As described above in detail, according to the present invention, a permanent current switch having a structure in which a coil wound around a coil bobbin is pressed from a periphery by a coil presser to fix the coil at a fixed position on the coil bobbin. A concave groove along the axial direction is provided on the coil winding surface of the coil bobbin, and a convex portion is provided on the inner peripheral surface of the coil presser corresponding to the concave, so that the coil wound on the coil bobbin can be used as the coil. By pressing against the concave portion of the coil bobbin by the convex portion of the presser, and applying a tension to the coil wound on the coil bobbin to fix the coil at the bobbin fixed position, the coil wire is operated by the electromagnetic force. The inconvenience of causing motion quenching can be reliably avoided, and highly reliable permanent current switch operation can be maintained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an external configuration of a coil bobbin and a coil retainer of a permanent current switch according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing an assembly structure of the permanent current switch in the above embodiment. FIG. 1 is a perspective view showing an outer appearance of a coil fixing structure in a conventional permanent current switch, FIG. 4 is a block diagram showing a basic configuration of a superconducting power storage system, and FIG. FIG. 6 is a cross-sectional view showing an example of the structure of a switch, and FIG. 6 is a cross-sectional view showing the configuration of a superconducting wire used for a permanent current switch. 1 ... Coil bobbin, 2 ... Coil presser, 3 ... Coil, 4,4, ... Recess, 5,5, ... Protrusion.

Claims (1)

(57) [Scope of request for utility model registration] 1. A permanent current switch comprising: a coil bobbin; and a coil presser for pressing a coil wound around the coil bobbin from the surroundings to fix the coil at a fixed position on the coil bobbin. A concave portion along the axial direction is provided in the winding surface portion, a convex portion is provided on the inner peripheral surface portion of the coil presser corresponding to the concave portion, and the coil wound on the coil bobbin is formed by the convex portion of the coil presser. A coil fixing device for a permanent current switch, wherein the coil is fixed to a bobbin fixed position by pressing the coil wound on the coil bobbin by pressing against a concave portion of the coil bobbin.