WO1988006374A1 - Rotor de moteur a aimant permanent - Google Patents

Rotor de moteur a aimant permanent Download PDF

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Publication number
WO1988006374A1
WO1988006374A1 PCT/JP1988/000150 JP8800150W WO8806374A1 WO 1988006374 A1 WO1988006374 A1 WO 1988006374A1 JP 8800150 W JP8800150 W JP 8800150W WO 8806374 A1 WO8806374 A1 WO 8806374A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic flux
motor
permanent magnet
rotor
yokes
Prior art date
Application number
PCT/JP1988/000150
Other languages
English (en)
Japanese (ja)
Inventor
Masatoyo Sogabe
Kazushi Kumagai
Original Assignee
Fanuc Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to KR1019870701021A priority Critical patent/KR930007668B1/ko
Application filed by Fanuc Ltd filed Critical Fanuc Ltd
Publication of WO1988006374A1 publication Critical patent/WO1988006374A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B65H7/06—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed
    • B65H7/12—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to double feed or separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30—Feeding material to presses

Definitions

  • the present invention relates to a motor having a permanent magnet fixed to an outer periphery thereof.
  • a main magnetic flux forming a magnetic path between the permanent magnets and a magnetic flux generated based on a current flowing through a winding on the stator side (hereinafter referred to as an armature working magnetic field).
  • an armature working magnetic field This is called a bundle. Due to the performance of the motor, the current flowing through the windings in each slot of the stator must flow (in phase) in synchronization with the change in the main magnetic flux exerted by the permanent magnet on the rotor. As a result, the armature reaction magnetic flux generated by the current flowing through the winding is out of phase with the main magnetic flux by ⁇ 2 on the rotor.
  • the magnetic permeability of the magnetic steel sheet material has the characteristic of rapidly decreasing as the magnetic flux density increases.After all, the current flowing through the windings of the steel sheet increases, so that the magnetic steel sheet constitutes a stator, etc. The magnetic resistance of the main magnetic flux passing through the stator is reduced, and the magnetic flux density of the main magnetic flux passing through the stator is reduced. This means that it is difficult to increase the output torque of the motor.
  • the output torque peaks when the current flowing through the winding is increased. Disclosure of the invention
  • an object of the present invention is to improve as much as possible the peak torque of the output torque of the motor in order to solve such a problem.
  • the present invention is characterized in that a plurality of jokes are arranged and fixed at equal intervals on the outer periphery of a mouth core at a constant interval from each other, and a permanent magnet is fixed on the outer periphery of each of the jokes.
  • the present invention provides an electric motor rotor structure.
  • each magnetic flux has a different path on the leader.
  • the gap between the adjacent yokes of each of the above is a concave part of the rotor, and the armature counteraction ⁇ Since the high magnetic flux density part passes through this concave part, the magnetic resistance due to air in this concave part And the magnetic flux density of the armature reaction magnetic flux decreases. Therefore, even if the current is increased, the decrease in the magnetic permeability of the electromagnetic plate such as the stator can be reduced as much as possible, so that the output torque is improved.
  • FIG. 1 is a cross-sectional view showing a part of a stator according to the present invention, along with a part of a stator shown by an imaginary line, which is enlarged and separated in a radial direction with respect to a rotor, and is shown by an arrow I-I in FIG. ,
  • Fig. 2 is a side view of ⁇ -Even shown in Fig. 1,
  • FIG. 3 shows the change in permeability with respect to the magnetic flux density
  • FIG. 4 is a graph showing the chemical characteristics.
  • a rotor core 12 in which electromagnetic layers are laminated is fixed to a rotor shaft 10, and the outer periphery of the rotor core 12 has the same thickness and the same shape on the outer periphery.
  • the yokes 13 are arranged and fixed at equal intervals in the circumferential direction. In view of the performance of the electric motor, it is desirable that the yoke 13 is formed by laminating electromagnetic steel sheets in the same manner as the rotor core 12. C.
  • each yoke 13 may be formed as a separate part from the rotor core 12 by using some ferromagnetic material and then welded and fixed to the outer periphery of the rotor core 12.
  • a permanent magnet 14 is attached and fixed to the outer periphery of each yoke 13.
  • the contour of the permanent magnet 14 is composed of a sign curve or an approximate curve on both sides in the longitudinal direction of the mouthpiece shaft 10, and the shape of the yoke 13 is also identical to that of the permanent magnet 14. . Therefore, each two yokes 13 adjacent to each other form a recess 20 having a shape sandwiched between the side surfaces 18 of the yokes 13.
  • the shape of the yoke 13 is most preferably the same as the shape of the permanent magnet 14, but is not necessarily limited to this.
  • the shape of the permanent magnet 14 is preferably a sin curve, but is not limited to this.
  • a motor having a motor with a permanent magnet 14 fixed on its outer periphery, a main magnetic flux forming a path between the permanent magnets and a stator 30 And an armature reaction magnetic flux generated based on the current flowing through the winding 32 of the armature. Due to the performance of the motor, the current flowing through the winding 32 in each slot 34 of the stator 30 must flow (in phase) in line with the change in the main magnetic flux exerted by the permanent magnet on the rotor. There is. In other words, during the rotation of the rotor, the permanent magnet 14 and the winding 3 are in the positional relationship shown in FIG.
  • the armature reaction magnetic flux generated by the current flowing through the winding 32 is out of phase with the main magnetic flux by ⁇ 2 on the rotor.
  • the main path of the main magnetic flux is indicated by a circle 22 by a solid line
  • the main path of the armature reaction magnetic flux is indicated by a circle 24 by a broken line.
  • the strength of the main magnetic flux is strong near the circle 22 and weaker toward the center of the circle 22.
  • the strength of the armature reaction magnetic flux is strong near the circle 24 and weaker near the center.
  • the magnetic permeability of the electromagnetic base material constituting the rotor core 12, the yoke 13 and the stator core 36 decreases as the magnetic flux density ⁇ ⁇ ⁇ increases. Therefore, in order to increase the output torque of a conventional motor in which the rotor is not provided with a stop 20, if the current flowing through the winding 32 is increased, the armature reaction magnetic flux becomes stronger, and as a result, Will decrease the magnetic permeability. Therefore, the magnetic resistance to the path of the main magnetic flux increases, and the output torque does not increase as intended.
  • the recesses 20 are provided by the yokes 13 adjacent to each other at positions corresponding to the positions between the adjacent permanent magnets 14, and the positions of the recesses 20 allow passage of the armature reaction magnetic flux. It exists in the middle of circle 24, which is the main route. Air has low magnetic permeability and high resistance to magnetic flux. In other words, the presence of the recess 20 makes it possible to reduce the armature reaction magnetic flux generated by the current flowing through the winding 32, thereby reducing the magnetic permeability of each electromagnetic plate. It is possible to reduce as much as possible and increase the output torque.
  • the electromagnetic cores of the rotor core, yoke, and stator core through which the main magnetic flux passes are formed. It is possible to reduce the decrease in the magnetic permeability of the plate as much as possible and increase the output torque. In other words, the output torque peaking phenomenon can be improved as much as possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

Structure de rotor d'un moteur. Des culasses (13), chacune équipée d'un aimant permanent (14) fixé à sa circonférence extérieure,sont disposées et fixées autour de la circonférence extérieure d'un noyau central de rotor (12), avec des entrefers prédéterminés entre eux, de telle sorte qu'ils forment des rainures (20) entre les culasses (13). La couche d'air de cette rainure (20) joue le rôle d'une grosse résistance magnétique menant à une voie principale (24) du flux magnétique généré à partir de la face d'un stator (30). Par conséquent, la baisse de perméabilité mu de chacun des noyaux de rotor (12) de la culasse (13) et du noyau du stator (36) peut être limitée et la force de tension de sortie du moteur peut être augmentée tout en minimisant la résistance magnétique dans le chemin principal (22) du flux magnétique principal, généré à partir de l'aimant permanent (14).
PCT/JP1988/000150 1986-03-11 1988-02-16 Rotor de moteur a aimant permanent WO1988006374A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019870701021A KR930007668B1 (ko) 1986-03-11 1987-03-11 디스텍커의 더블-블랭크 검출장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62/31560 1987-02-16
JP62031560A JPS63202247A (ja) 1987-02-16 1987-02-16 永久磁石を用いた電動機のロ−タ構造

Publications (1)

Publication Number Publication Date
WO1988006374A1 true WO1988006374A1 (fr) 1988-08-25

Family

ID=12334558

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1988/000150 WO1988006374A1 (fr) 1986-03-11 1988-02-16 Rotor de moteur a aimant permanent

Country Status (4)

Country Link
EP (1) EP0303703A4 (fr)
JP (1) JPS63202247A (fr)
KR (1) KR930007668B1 (fr)
WO (1) WO1988006374A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5545938A (en) * 1991-12-10 1996-08-13 British Technology Group Ltd Doubly salient reluctance machines

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006014389A (ja) * 2004-06-22 2006-01-12 Daikin Ind Ltd 回転子、電動機、圧縮機及び送風機、並びに空気調和器
CN107482804B (zh) * 2017-07-31 2019-05-31 江苏大学 一种减小齿槽转矩的新型表贴式永磁同步电机

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50131009A (fr) * 1974-04-04 1975-10-16
JPS6165868U (fr) * 1984-10-05 1986-05-06

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1060028B (de) * 1955-11-24 1959-06-25 Ernst Massar Dr Ing Dauermagneterregte elektrische Maschine
JPS5951223B2 (ja) * 1977-03-15 1984-12-12 電気音響株式会社 ロ−タ−
JPS5759462A (en) * 1980-09-24 1982-04-09 Meidensha Electric Mfg Co Ltd Assembling method for rotary electric machine
FR2538182B1 (fr) * 1983-12-08 1989-05-05 Kollmorgen Tech Corp Servomoteur a courant continu du type a collecteur a aimants permanents
JPS6158457A (ja) * 1984-08-29 1986-03-25 Fanuc Ltd 永久磁石界磁同期電動機
US4729160A (en) * 1985-08-14 1988-03-08 Kollmorgen Technologies Corporation Method for manufacturing a composite sleeve for an electric motor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50131009A (fr) * 1974-04-04 1975-10-16
JPS6165868U (fr) * 1984-10-05 1986-05-06

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0303703A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5545938A (en) * 1991-12-10 1996-08-13 British Technology Group Ltd Doubly salient reluctance machines

Also Published As

Publication number Publication date
KR930007668B1 (ko) 1993-08-18
EP0303703A4 (fr) 1989-06-21
JPS63202247A (ja) 1988-08-22
EP0303703A1 (fr) 1989-02-22
KR880701178A (ko) 1988-07-26

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