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    • 43. 发明公开
    • POSITION DETECTION DEVICE FOR MOVABLE MAGNET TYPE LINEAR MOTOR
    • POSITIONSDETEKTORFÜRBEWEGLICHEN MAGNETLINEARMOTOR
    • EP2451061A1
    • 2012-05-09
    • EP09846846.5
    • 2009-12-25
    • Sabanci UniversityFujitec Co., Ltd
    • MARKON SandorONAT Ahmet
    • H02K41/03H02P25/06
    • H02P25/06H02K11/225H02K29/12H02K41/031H02P6/006H02P6/18H02P6/182
    • The present invention provides a position detector which can detect the position of a mover on the side of a stator, and which realizes detection with high accuracy in a moving magnet type linear motor.
      In a moving magnet type linear motor including: a stator 2 with a plurality of coils placed in one direction; and a mover 3 with a permanent magnet so placed as to be opposed to the stator 2, a position detector according to one embodiment of the present invention detects the position of the mover 3. The position detector includes a magnetic body 5 fixed to the mover 3. One or two or more coils are selected and a voltage is applied to the selected coil while a current or a voltage induced in a coil adjacent to the selected coil is measured, and the position of the magnetic body 5 that changes in response to the position of the mover 3 is determined based on the measured current or the measured voltage.
    • 本发明提供一种位置检测器,其能够检测定子侧面的动子的位置,并且在移动磁体型直线电动机中实现高精度的检测。 在一种移动磁体型线性电动机中,包括:具有沿一个方向设置的多个线圈的定子2; 以及具有与定子2相对设置的永磁体的动子3,根据本发明的一个实施例的位置检测器检测动子3的位置。位置检测器包括固定到动子的磁体5 选择一个或两个或更多个线圈,并且在测量与所选择的线圈相邻的线圈中感应出的电流或电压时,向所选线圈施加电压,并且测量响应于 基于测量的电流或测量的电压来确定动子3的位置。
    • 50. 发明公开
    • Permanent magnet rotor of brushless motor and production method thereof
    • 永磁转子的无刷电动机,以及制备方法
    • EP1009085A2
    • 2000-06-14
    • EP00106063.1
    • 1993-08-10
    • SEIKO EPSON CORPORATION
    • Nagate, TakashiIshiguro, AkiyoshiYamakoshi, Issei
    • H02K1/27
    • H02K1/276H02K1/2746H02K21/14H02K29/03H02K29/12
    • In a brushless motor which includes a stator (26) and a rotor (1) rotatably supported inside the stator and wherein the rotor has a yoke (2) formed by laminating a large number of steel sheets (4), the yoke has an even number of magnetic poles (5) protruding outward, and a permanent magnet (3) for a field is inserted into each, or every other, magnetic poles, the permanent magnet rotor of the present invention has a structure in which the permanent magnet for the field is inserted into a slot (6) formed in the magnetic pole, and protuberances (9) striking the side surfaces of the permanent magnet for the field are disposed at the right and left portions of the slot. Further, in the present invention, in the brushless motor of this kind, engagement pawls (12) engaging with the permanent magnet for the field are so disposed as to protrude, reliefs (13) for absorbing a bend of the engagement pawl are formed in those of the steel sheets laminated to form the yoke which correspond to the engagement pawl. The steel sheets of the yoke are deviated on one or both ends sequentially in the rotating direction. A bridge width at both ends of the slot is set to be greater than the greater one of a width capable of being punched out and a width allowed from a mechanical strength due to a centrifugal force between the width capable of being punched out, a width allowed from the number of passing magnetic fluxes and the width allowed from the mechanical strength due to the centrifugal force. Further, at least one connecting portion of gap is provided to each magnetic pole so as to laminate the steel sheets. The bridge width at both end of the slot is set to be smaller than a width from the outside portion of the permanent magnet for the field to the outside edge of the magnetic pole.