JP2004236498A5

JP2004236498A5 -

Info

Publication number: JP2004236498A5
Application number: JP2004111063A
Authority: JP
Filing date: 2004-04-05
Publication date: 2005-09-02
Anticipated expiration: 2018-05-13

Claims

A cylinder-shaped frame;
A pair of end brackets fixed to both ends of the frame;
A pair of linear bearings attached to both ends of the case having the frame;
A linear motion shaft supported by the pair of linear bearings so as to be capable of linear reciprocation, and a magnetic permeability provided with a magnet mounting portion fixed to the linear motion shaft and disposed in the frame and extending in the axial direction of the linear motion shaft One or more permanent magnets that are supported by the magnet mounting portion of the magnet mounting body and a plurality of permanent magnets arranged in the axial direction so that N poles and S poles alternately appear on the magnetic pole surface. A mover with a permanent magnet array;
A base portion fixed to the inner peripheral side of the frame and a plurality of magnetic poles whose magnetic pole faces are opposed to the one or more permanent magnet rows in the radial direction of the linear motion shaft and are spaced at a predetermined interval in the axial direction. And one or more stator cores having a portion, and a stator having a plurality of excitation windings for exciting the plurality of magnetic pole portions of the one or more stator cores,
A moving magnetic field is generated by changing the direction of the excitation current flowing in the plurality of excitation windings to change the polarity of the magnetic poles appearing on the magnetic pole surfaces of the plurality of magnetic pole portions, and the one or more permanent magnet arrays and the plurality of the plurality of permanent magnet arrays A cylinder-type linear synchronous motor configured to generate a thrust force that displaces the linear motion shaft in the axial direction between the magnetic pole portion,
The plurality of exciting windings of the stator are each configured by winding a winding conductor in an annular shape so as to surround the periphery of the mover in the circumferential direction,
A portion of the one excitation winding corresponding to a slot formed between the two magnetic pole portions adjacent in the axial direction of the one or more stator cores is fitted;
The linear motion shaft projecting from the end bracket is provided on the end bracket on the side where the linear bearing supporting the end portion on the non-output shaft portion side where the load of the linear motion shaft of the pair of end brackets is not connected. A cylinder-type linear synchronous motor, wherein a cover member that covers an end portion of the non-output shaft portion is attached.

A cylindrical frame having a cavity inside;
A pair of end brackets fixed to both ends of the frame;
A pair of linear bearings attached to the pair of end brackets;
A linear motion shaft supported by the pair of linear bearings so as to be capable of linear reciprocation; and a magnet mounting portion fixed to the linear motion shaft and disposed in the cavity of the frame and extending in an axial direction of the linear motion shaft. And a plurality of permanent magnets which are supported by the magnet mounting portion of the magnet mounting body and arranged in the axial direction so that N poles and S poles appear alternately on the magnetic pole surface. A mover provided with m rows (m is a positive integer of 2 or more) of permanent magnets arranged at intervals in the circumferential direction;
The base fixed to the inner peripheral side of the frame and the n magnetic pole surfaces in the radial direction of the linear motion shaft are opposed to the m or more permanent magnet rows and are arranged at predetermined intervals in the axial direction. (Where n is a positive integer of 3 or more) m stator cores having magnetic pole portions, and magnetic poles having a predetermined polarity appear on the magnetic pole surfaces of the n magnetic pole portions of the m stator cores. Comprising a stator having a plurality of excitation windings for exciting each magnetic pole part,
A moving magnetic field is generated by changing the polarity of the magnetic poles appearing on the magnetic pole surfaces of the plurality of magnetic pole portions by passing excitation currents of different phases (p is a positive integer of 2 or more) through the plurality of excitation windings. A cylinder configured to generate a thrust force that displaces the linear motion shaft in the axial direction between the m rows of permanent magnet rows and the n magnetic pole portions of the m stator cores. A linear synchronous motor,
The m stator cores are arranged at substantially equal intervals in the circumferential direction of the mover,
Each of the plurality of exciting windings has p × q (where q is a positive integer of 1 or more) annular windings in which winding conductors are wound in an annular shape so as to surround the mover in the circumferential direction. Consisting of lines,
N has a relationship of n = p × q + 1,
A part of one annular winding corresponding to each of n−1 slots formed between the two magnetic pole portions adjacent to each other in the axial direction of the m stator cores is fitted. ,
The linear motion shaft projecting from the end bracket is provided on the end bracket on the side where the linear bearing supporting the end portion on the non-output shaft portion side where the load of the linear motion shaft of the pair of end brackets is not connected. A cylinder-type linear synchronous motor, wherein a cover member that covers an end portion of the non-output shaft portion is attached.

The cylinder type linear synchronous motor according to claim 1 or 2, wherein the exciting winding is wound around a bobbin made of an insulating material, and a part of the bobbin is fitted in the slot.

The cylinder-type linear synchronous motor according to claim 2, wherein the m stator cores are an even number.

A plurality of fitting grooves into which the base portions of the plurality of stator cores can be inserted from one opening end side of the frame are formed in the inner peripheral portion of the frame,
The plurality of fitting grooves have a stopper surface for positioning the stator core in contact with one end surface of the stator core in the axial direction on the other opening end side of the frame,
The stator core is in contact with the other end surface in the axial direction of the stator core in a state where the base portion of the stator core is fitted in the fitting groove and the one end surface of the stator core is in contact with the stopper surface. A stopper member to be fixed to the frame,
3. The cylinder-type linear synchronous motor according to claim 1, wherein the stator core, the plurality of excitation windings, and the stopper member are molded of an insulating mold material.

A plurality of annular permanent magnets magnetized so that N poles or S poles appear on the outer surface in the radial direction on the outer peripheral portion of the magnet mounting body of the mover have N poles and S poles in the axial direction. Are fitted at predetermined intervals in the axial direction so as to be alternately arranged,
2. The cylinder-type linear synchronous motor according to claim 1, wherein a portion of the annular permanent magnet facing the magnetic pole portion of the one or more stator cores constitutes the plurality of permanent magnets constituting the permanent magnet row.

The cylinder type linear synchronous motor according to claim 6, wherein the stator core is configured by laminating a plurality of comb-shaped steel plates so that the magnetic pole surface of the stator core has an arc shape.