JPH03111172U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing the main parts of a multi-pole, multiphase movable magnet type linear DC brushless motor showing an embodiment of the present invention, and Fig. 2 shows the field magnets of the movable magnet type linear DC brushless motor. A developed diagram showing the relationship between the armature coil and the magnetic pole discriminating element, Fig. 3 is an explanatory diagram of the arrangement position of the armature coil and the magnetic pole discriminating element used conventionally, and Fig. 4 is a conventional diagram showing the arrangement position of the armature coil and the magnetic pole discriminating element used conventionally. Fig. 5 is an exploded perspective view of the main parts of the movable magnet type linear DC brushless motor, and Fig. 6 is another conventional brushless motor. A vertical cross-sectional view of a movable magnet type linear DC brushless motor showing an example when viewed from the moving direction of the slider, Fig. 7 is a perspective view of a field magnet, and Fig. 8 is a movable magnet type linear brushless motor showing another conventional example. FIG. 2 is a top perspective view showing the main parts of a linear DC brushless motor. Explanation of codes, LDM, LDM-1, LDM-2
, LDM-3...Multi-pole polyphase movable magnet linear DC brushless motor, 1, 1'...Armature coil, 1a, 1b, 1'a, 1'b...Conductor portion contributing to thrust generation , 1c, 1d, 1'c,
1'd...Conductor part perpendicular to the conductor part that contributes to the generation of thrust, 2...Conductor part part where the conductor part that contributes to the generation of thrust intersects with the conductor part orthogonal to the conductor part, 3, 3 -1, ..., 3-6...Magnetic pole discrimination element, 3'-4, 3'-5, 3'-6...Position of magnetic pole discrimination element by conventional method, 4,4'...Coreless stator electric machine Child, 5...Mover, 6, 6-1,
6', 6'', 6, 6''''... Field magnet, 7, 7'... Stator yoke and linear guide, 8, 8'... Printed wiring board, 9, 9'...
Traveling yoke, 9a... Extension bending portion, 10... Guide roller, 11... Stator, 12... Base, 13
...Magnetic air gap, 14...Stator base, 15...
...Stat, 16...Stator yoke, 17...
Printed wiring board, 18...Linear guide protrusion, 19...Switcher, 20...Space for magnetic pole discrimination element arrangement, 21...2 division center line, 22...Escape prevention protrusion, 23...Buffer member , 24... linear magnetic slider, 25... slider base, 26...
...Magnetic sensor, 27...Linear magnetic encoder magnetic pole, 28...Linear magnetic encoder, 29...Lead wire.

Claims (1)

[Scope of claims for utility model registration] (1) N poles, so that adjacent magnetic poles are different poles;
A field magnet is formed by having S magnetic poles P (P is an integer of 2 or more), and n (n is an integer of 2 or more) along the moving direction of the slider at a position facing the field magnet. A coreless armature is formed by arranging a group of air-core armature coils, a magnetic pole discriminating element is provided on the coreless armature side, and either the field magnet or the coreless armature having the magnetic pole discriminating element is 1. A linear DC brushless motor comprising a relatively movable mover and a stator, the linear DC brushless motor comprising the following components. The length and width of the armature coil in the direction perpendicular to the moving direction of the moving element are approximately equal to the width of the field magnet in the direction perpendicular to the moving direction of the moving element. The armature coil is located at a corner outer circumferential position of the armature coil where the conductor extension position in the direction perpendicular to the moving direction of the mover and the conductor part extension position in the direction parallel to the mover movement intersect with each other. It is formed in an air-core shape that can have a space for arranging the magnetic pole discriminating element so that the magnetic pole discriminating element does not overlap with the armature coil. A conductor portion of the armature coil that contributes to the generation of thrust in a direction perpendicular to the direction of movement of the mover and a conductor portion of the armature coil in a direction parallel to the direction of movement of the mover intersect and do not overlap with the armature coil. The magnetic pole discriminating element is disposed at the space position for disposing the magnetic pole discriminating element on the outer periphery of the corner of the coil so as not to overlap with the armature coil. (2) The armature coil has corner portions that intersect with each other at the conductor extension position perpendicular to the moving direction of the mover and the conductor extension position parallel to the mover movement direction. It is characterized by being formed into an elliptical air-core type in a plane so that it can have a space for arranging the magnetic pole discriminating element at the outer circumferential position so that the magnetic pole discriminating element does not overlap with the armature coil. The linear DC brushless motor according to claim (1).