JPS6130465Y2 - - Google Patents

Description

[Detailed description of the invention] This invention uses an electromagnetic damper in the rotor of a superconducting synchronous rotating machine to electromagnetically suppress harmonics or asynchronous magnetic fields to the superconducting field or to provide a braking action to the rotor. The present invention relates to a superconducting rotor having a superconducting rotor.

FIG. 1 is a sectional view showing a rotor of a conventional superconducting synchronous rotating machine. In FIG. 1, 1 is a superconducting field coil, 2 is an electromagnetic damper, 3 is a conductive cylinder made of a good conductive material, and 4 is a centrifugal cylinder for applying centrifugal force. 5 is a conductive cylinder 3 that is mainly used when an excessive current flows through the stator.
It is a compression cylinder that provides non-uniform compression force acting on the cylinder.

In the rotor having such a configuration, the electromagnetic damper 2 has three parts: a conductive cylinder 3, a centrifugal force cylinder 4, and a compression cylinder 5.
It was composed of multiple layers. In the electromagnetic damper 2, both the centrifugal force cylinder 4 and the compression cylinder 5 are made of solid plates, so the plate thickness becomes large, and as a result, the overall thickness of the electromagnetic damper 2 becomes large. There were flaws.

Furthermore, when the thickness of the electromagnetic damper 2 increases, the electromagnetic coupling coefficient between the field coil and the armature coil decreases, and the output capacity of the rotating machine decreases. In addition, eddy currents are induced in the centrifugal force cylinder 4, resulting in a temperature rise.

This invention was made in order to eliminate the above-mentioned conventional drawbacks, and instead of the centrifugal force cylinder 4, by wrapping and supporting the outer periphery of the conductive cylinder 3 with fibers having high tensile strength, the overall It is an object of the present invention to provide a superconducting rotor having an electromagnetic damper that can be made small in thickness and has high mechanical strength.

Hereinafter, embodiments of the superconducting rotor of this invention will be described based on the drawings. FIG. 2 is a cross-sectional view of one embodiment of the present invention, and the same parts as in FIG. 1 are given the same reference numerals and explanation thereof will be omitted, and only the parts different from those in FIG. 1 will be described.

In this FIG. 2, the superconducting coil 1, electromagnetic damper 2, conductive cylinder 3, and compression cylinder 5 are the same as those in FIG. 1, but in this embodiment, the centrifugal force cylinder 4 in FIG. 6 is provided. This bind layer 6 is formed by winding a mechanically strong wire or fiber assembly around the outer periphery of the conductive cylinder 3.

In the electromagnetic damper 2 having such a configuration, the centrifugal force acting on the conductive cylinder 3 is supported by the binding layer 6,
Furthermore, since the bind layer 6 is made of wire or fiber made of a metal or non-metal material having high tensile strength and wound around it, it has the advantage of being lightweight and having a small thickness. Further, since the bind layer 6 thus produced is an electrical insulator or a layer with high electrical resistance, eddy currents are not induced and there is no fear of temperature rise.

FIG. 3 is a cross-sectional perspective view showing the superconducting rotor of this invention. In FIG. 3, parts that are the same as those in FIGS. 1 and 2 are given the same reference numerals, and their explanation will be omitted, and the parts that are different from those in FIGS. 1 and 2 will be mainly described. In the embodiment shown in FIG. 3, a groove 7 is provided on the outer peripheral surface of the conductive cylinder 3, and the above-mentioned bind layer 6 is provided in this groove 7.

In this way, by forming the bind layer 6 in the groove 7, not only can the overall thickness of the electromagnetic damper 2 be reduced, but also by exposing a part of the conductive cylinder 3 to the outer periphery of the electromagnetic damper 2, There is an advantage that the cooling effect can be improved.

As described above, according to the superconducting rotor of this invention, a bind layer made of wires or fibers of metal or non-metallic material having high tensile strength is formed at predetermined locations on the outer peripheral surface of the conductive cylinder of the electromagnetic damper. Therefore, the overall thickness of the electromagnetic damper can be reduced, and the mechanical strength is high, as well as being lightweight and thin.Furthermore, since a part of the conductive cylinder is exposed on the outer periphery of the electromagnetic damper, it is possible to reduce the overall thickness of the electromagnetic damper. It has excellent effects such as improved effectiveness.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a rotor of a conventional superconducting synchronous rotating machine, Fig. 2 is a sectional view showing an embodiment of the rotor of a superconducting synchronous rotating machine of this invention, and Fig. 3 is a superconducting synchronous rotating machine of this invention. FIG. 3 is a cross-sectional perspective view showing another example of a rotor of a rotating machine. 1...Superconducting field coil, 2...Electromagnetic damper,
3... Conductive cylinder, 5... Compression cylinder, 6... Bind layer, 7... Groove. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A compression cylinder provided at a predetermined interval on the outer circumferential side of a superconducting field coil, a compression cylinder provided in close contact with the outer circumference of the compression cylinder, having an exposed portion on the outer circumference, and having a groove at a predetermined portion on the outer circumference. A superconducting rotor comprising a conductive cylinder, an electric insulator made of a wire or fiber of a metal or non-metallic material having high tensile strength, or a bind layer having high electric resistance, which is wound around the groove of the conductive cylinder.