JPH02122582U - - Google Patents

Description

[Brief explanation of drawings]

1 to 4 are views showing a first embodiment of the present invention, in which FIG. 1 is an exploded perspective view of a main part of a stator of a PM stepping motor, and FIG. 2 is an assembly of a main part of the stator. 3 is a sectional view of the PM stepping motor, FIG. 4 is a perspective view showing the cover yoke, and FIG. 5 is an assembled perspective view of the main parts of the stator showing another example of the first embodiment. Figures 6 to 7
The figures show a second embodiment, in which Fig. 6 is an exploded perspective view of the main part of the stator of the PM stepping motor, Fig. 7 is a sectional view of the PM stepping motor, and Fig. 8 is a diagram showing the coil space. FIG. 3 is a diagram comparing the ratio of coil volumes between a PM stepping motor having a bobbin-less coil and a PM stepping motor having a bobbin-wound coil. DESCRIPTION OF SYMBOLS 1... Yoke, 1a... Magnetic pole tooth, 2... Rotor, 3, 21... Insulator, 3a, 21a... Annular flat plate part, 3b... Cylindrical part, 3c, 21b... Band-shaped part, 3d... Tongue piece, 4... Conductor foil, 4a, 6a...
Terminal section, 5... Bobbinless coil, 22...
Second insulator, 22a...cylindrical part, 22b... hollow disk part.

Claims (1)

[Claims for Utility Model Registration] (1) A hollow disc-shaped yoke having a plurality of magnetic pole teeth extending from an inner peripheral edge in the axial direction of the rotor, and a hollow disc-shaped yoke having a plurality of magnetic pole teeth extending from an inner peripheral edge of the yoke so as to surround the magnetic pole teeth. In the stator for an electric motor, the stator is provided with a bobbinless coil, and between the yoke and the bobbinless coil, there is provided at least a plate surface of the yoke radially outward from the magnetic pole teeth, and a bobbinless coil opposite to this plate surface. A plate-shaped insulator is inserted between the insulator and one end surface of the bobbinless coil, and this insulator is formed with a tongue piece that protrudes radially outward from the outer peripheral edge of the bobbinless coil. A stator for an electric motor, characterized in that a terminal is provided for relaying each end of a winding of a bobbinless coil to the outside. (2) A hollow disk-shaped yoke having a plurality of magnetic pole teeth extending from an inner peripheral edge in the axial direction of the rotor, and a bobbinless coil provided around the inner peripheral edge of the yoke so as to surround the magnetic pole teeth. In the stator for an electric motor, there is a space between the yoke and the bobbinless coil, at least between a plate surface of the yoke radially outward from the magnetic pole teeth and one end surface of the bobbinless coil opposite to this plate surface. A plate-shaped insulator is inserted, and this insulator has a band-shaped portion extending radially outward from the outer peripheral edge of the bobbinless coil, and this band-shaped portion includes the winding of the bobbinless coil. A stator for an electric motor, characterized in that a conductive wire foil to which each end can be connected is formed along the longitudinal direction of the strip. (3) In the stator for an electric motor according to claim 1 or 2, a cylindrical portion interposed between the magnetic pole teeth and the inner circumferential surface of the bobbinless coil, and a hollow portion covering the other end surface of the bobbinless coil. 1. A stator for an electric motor, characterized in that a second insulator comprising a disk portion is provided. (4) A hollow disk-shaped yoke having a plurality of magnetic pole teeth extending from an inner peripheral edge in the axial direction of the rotor, and a bobbinless coil provided around the inner peripheral edge of the yoke so as to surround the magnetic pole teeth. In the stator for an electric motor, an insulator is inserted between the yoke and the bobbinless coil, and this insulator faces a plate surface of the yoke radially outward from the magnetic pole teeth and the plate surface. An annular flat plate part inserted between one end surface of the bobbinless coil and a cylindrical part extending from the inner circumferential edge of the annular flat plate part between the magnetic pole teeth and the inner circumferential surface of the bobbinless coil. The annular flat plate portion is formed with tongue pieces that protrude radially outward from the outer peripheral edge of the bobbinless coil, and each end of the winding of the bobbinless coil is attached to the tongue piece to the outside. A stator for an electric motor, characterized in that a relay terminal is provided. (5) A hollow disc-shaped yoke having a plurality of magnetic pole teeth extending from an inner peripheral edge in the axial direction of the rotor, and a bobbinless coil provided around the inner peripheral edge of the yoke so as to surround the magnetic pole teeth. In the stator for an electric motor, an insulator is inserted between the yoke and the bobbinless coil, and the insulator is opposed to a plate surface of the yoke radially outward from the magnetic pole teeth. An annular flat plate part inserted between one end surface of the bobbinless coil and a cylindrical part extending from the inner circumferential edge of the annular flat plate part between the magnetic pole teeth and the inner circumferential surface of the bobbinless coil. The annular flat plate portion has a band-shaped portion extending radially outward from the same outer edge of the bobbinless coil, and each end of the winding of the bobbinless coil is attached to the band-shaped portion. A stator for an electric motor, characterized in that a connectable conducting wire foil is formed along the longitudinal direction of the strip. (6) An electric motor comprising the electric motor stator according to any one of claims 1 to 5.