JPH0223073Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Technical field of invention] The present invention relates to an improvement of a salient pole rotor.

[Technical background of the invention and its problems]

The structure of a conventional salient pole rotor is as shown in Fig. 1, in which a magnetic pole body 2 is protruded from a yoke 1, a field winding 3 is wound around this magnetic pole body 2, and a lumpy salient pole head 4 is attached to a bolt. 5 is firmly fastened to the magnetic pole body 2.

The coil bracket 6 is provided between adjacent magnetic poles with the field winding 3 and an insulating plate 7 interposed therebetween. The wire 3 is supported by a massive magnetic pole head 4 to prevent deformation.

In the synchronous motor having the above structure, the rotating magnetic field generated by the stator winding is transmitted to the rotor's lumpy magnetic pole head 4 at the time of starting.
As a result, an eddy current is induced on the surface of the lumpy magnetic pole head 4, and this current flows through the coil bracket 6 between the adjacent lumpy magnetic pole heads 4.

Since it is difficult to achieve complete contact between the contact surface between the lumpy magnetic pole head 4 and the coil bracket 6, electrolytic corrosion occurs, and the contact surface between the lumpy magnetic pole head 4 and the coil bracket 6 is damaged. Since the coil bracket 6 is generally made of a light metal material such as an aluminum alloy, the contact surface is seriously damaged by electrolytic corrosion, and it is necessary to prevent this electrolytic corrosion. To prevent this, an insulating plate 8 is inserted.
Similar to the field winding 3, the insulating plate 8 generates forces P and Q of the centrifugal force F. Therefore, the force of component force Q,
The difference in thermal expansion between the lumpy magnetic pole head 4 and the coil bracket 6 affects the contact state of the insulating plate 8, causing movement of the insulating plate 8, which has the disadvantage that the insulating plate 8 protrudes to the outside of the rotor's circumference. Ta.

[Purpose of invention]

The object of the present invention is to obtain a salient pole type rotor in which an insulating plate is securely held by a coil bracket and is fitted between a lumpy salient pole head and the coil bracket.

[Summary of the idea]

The present invention provides an insulating plate between the lumpy salient magnetic pole head and the coil bracket, supports this insulating plate in contact with the lumpy salient magnetic pole head, and fixes the insulating plate to the coil bracket to prevent the insulating plate from slipping out. This is what I did.

[Embodiment of the invention] An embodiment of the invention will be described below based on FIG. 2. The same parts as those of the prior art shown in FIG. 1 are given the same reference numerals, and the explanation will be omitted.

FIG. 3 is a detailed perspective view of the coil bracket 6 and insulating plate 8 of FIG. 2.

A recess is provided in the surface of the coil bracket 6 that contacts the lumpy magnetic pole head 4, and an insulating plate 8 is inserted and held in this recess.

The salient pole rotor configured as described above has an insulating plate 8.
By inserting and holding the coil bracket into the recess of the coil bracket 6, it is fixed at the edge of the recess of the coil bracket 6 even with a force of a component Q of the centrifugal force F of the insulating plate 8. Furthermore, a difference in thermal expansion occurs between the lumpy salient magnetic pole head 4 and the coil bracket 6, so that the insulating plate 8 will not be able to maintain the coil bracket 6 against any external force such as the contact state of the insulating plate 8.
It is held in the concave part to prevent it from popping out.

[Effect of idea]

The present invention is effective in obtaining a mechanically reliable salient pole rotor.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main part showing the structure of the rotor of a conventional salient pole synchronous machine, Fig. 2 is a sectional view of the main part showing an embodiment of the present invention, and Fig. 3 is a detailed perspective view of Fig. 2. It is a diagram. 1... Yoke, 2... Magnetic pole body, 3... Field winding,
4... Massive magnetic pole head, 5... Bolt, 6... Coil bracket, 8... Insulating plate.

Claims (1)

[Scope of utility model registration request] A yoke having a protruding magnetic pole body is arranged with field windings wound around the magnetic pole body so as to be adjacent to each other, and the head of the field winding is pressed by a lumpy protruding pole head. , in a salient pole rotor in which the side portions of the field windings are brought into contact with coil brackets via insulating plates,
A salient pole type rotor, characterized in that a recess is provided in the coil bracket, a second insulating plate is inserted into the recess, and the second insulating plate is pressed by the lumpy salient magnetic poles.