公开(公告)号：JPH07255159A

公开(公告)日：1995-10-03

申请号：JP6792494

申请日：1994-03-11

Applicant: TOYOTA MOTOR CORP

Inventor： MIURA TETSUYA ,  KAWABATA YASUMI ,  YAMADA EIJI

IPC: H02K21/16

Abstract: PURPOSE:To improve control characteristic and efficiency by approximating an inverse electromotive force generated in a coil to a sine wave in an external magnetic field type synchronous motor. CONSTITUTION:In a synchronous 3-phase motor having the even number of magnetic pole pairs, permanent magnets 51 to 54 are not arranged in the positions having equal interval but in the positions which are deviated forward and backward from each other by an electric angle of 30 degrees. Namely, electric angle of one magnetic pole pair is set to 330 degrees, while electric angle of the other pair is set to 390 degrees. As a result, an electromotive force generated at the coil of phase U, for example, is deviated in the phase forward and backward in one coil and the other coil and its composite voltage is not generated in the rectangular shape and has a part which is changing step by step at the rising and falling edges. As a result, an electromotive force generated in the coil of each phase, that is, a terminal voltage between phases is approximated to a sine wave to improve control characteristic and efficiency of a synchronous type 3-phase motor.

公开(公告)号：JPH0739097A

公开(公告)日：1995-02-07

申请号：JP17833193

申请日：1993-07-19

Applicant: TOYOTA MOTOR CORP

Inventor： KAWABATA YASUMI ,  MIURA TETSUYA

IPC: H02K3/18 ,  H02K3/12 ,  H02K3/38 ,  H02K3/50 ,  H02K3/52

Abstract: PURPOSE:To reduce the length of the rotating shaft direction of a motor by a method wherein formed coils in one slot are connected to formed coils in other same phase slots with conducting members individually. CONSTITUTION:Required number of formed coils 20 in one slot are connected to formed coils 20 in other same phase slots individually with conducting members 14 which are laminated in the rotating shaft direction of a motor with insulating layers in crossover coils 10 therebetween. Therefore, coils of the respective phases can be constructed without bundling a plurality of conductors. As a result, a variation in inductance values and fluctuation in torque can be reduced and the efficiency of the motor can be improved and, by utilizing the crossover coils 10, protruding lengths of coil ends in the rotating shaft direction can be reduced. With this constitution, the length of the rotating shaft direction of the motor can be reduced.

公开(公告)号：JPH0739091A

公开(公告)日：1995-02-07

申请号：JP20024193

申请日：1993-07-19

Applicant: TOYOTA MOTOR CORP

Inventor： KAWABATA YASUMI ,  YAMADA EIJI ,  MIURA TETSUYA

IPC: H02K1/02 ,  H02K1/24 ,  H02K1/27

Abstract: PURPOSE:To increase the reluctance torque Tr of a synchronous motor having salient poles on the outer circumference of its rotor and increase the output torque of the motor. CONSTITUTION:Permanent magnets 52 are attached to the outer circumference of the rotor of a three-phase synchronous motor and salient pole 71 and or 74 is provided between the permanent magnets 52. A slit 81 and or 84 is formed in the center part of the salient pole 71 and or 74 in a radial direction and, further, the inner circumference side end of the slit 81 and or 84 is extended along the inner circumference. As a result, a loop-shaped magnetic path in the salient poles is difficult to be formed and a d-axis inductance Ld is reduced. On the other hand, a q-axis inductance Lq is increased. As a result, a reluctance torque Tr which is proportional to the difference between the a-axis inductance Ld and the 1-axis inductance Lq can be increased. Therefore, if the output torque of the synchronous motor is increased, the performance (for instance, the running distance, the maximum speed, etc.) of an electric vehicle on which the motor is mounted can be improved.

公开(公告)号：JPH05199705A

公开(公告)日：1993-08-06

申请号：JP559792

申请日：1992-01-16

Applicant: TOYOTA MOTOR CORP

Inventor： MIZUTANI RYOJI ,  MIYATANI TAKAO ,  KAWABATA YASUMI ,  KUBO KAORU

IPC: H02K7/12

Abstract: PURPOSE:To realize a torque constant variable type motor having a smaller size and a simpler structure. CONSTITUTION:A cylinder 45 is assembled in a rotor body 16. A piston 46 for driving a motor hydraulically or by a ball screw in an axial direction is provided in the cylinder 45. The piston 46 is coupled to a thrust ring 28 through a bearing 48, and the ring 28 is coupled to a yoke 22. When the piston 46 moves in an axial direction of a rotor, this movement is transmitted to the yoke 22 through the ring 28, and the yoke 22 and a permanent magnet 24 on its surface slide in the axial direction of the rotor. A positional relationship to a core 34 of a stator is varied, and an operating magnetic flux area and/or gap is altered. As a result, an output torque and a maximum speed are varied. Accordingly, since means for varying the positional relationship between the rotor and the stator is assembled in the rotor, an entire structure is simplified and reduced in size.

公开(公告)号：JPH02202329A

公开(公告)日：1990-08-10

申请号：JP1839989

申请日：1989-01-27

Applicant: TOYOTA MOTOR CORP ,  TOYOTA CENTRAL RES & DEV

Inventor： KAWABATA YASUMI ,  MIZUTANI RYOJI ,  INAGUMA YUKIO ,  OOTATSU TAIJI ,  ARAKAWA TOSHIFUMI

IPC: H02K1/27 ,  H02K21/16

Abstract: PURPOSE:To reduce the cogging torque of an apparatus to almost zero by specifying the circumferential length L of a permanent magnet. CONSTITUTION:The external cylinder of an apparatus forms a stator 34, where magnetic poles 33 are arranged, and the internal cylinder thereof a rotor 38 where magnets 36 are arranged. Further, the circumferential length L of each permanent magnet (20, 36) is determined as follows: L=n.Pp+a.g+b.gp+c.Pp (when n is an arbitrary integer, a is 0.4 to 0.6, b is 0.3 to 0.5 and c is -0.06 to -0.04.) In this manner, the rotation of the title motor is made smooth.

公开(公告)号：JPH0255594A

公开(公告)日：1990-02-23

申请号：JP20689688

申请日：1988-08-20

Applicant: TOYOTA MOTOR CORP

Inventor： KAWABATA YASUMI ,  INAGAKI ATSUHITO

IPC: H02P5/46

Abstract: PURPOSE:To operate the servo system of each motor with maximum efficiency by controlling a control motor to be modified according to servo system feedback information of a control motor to be monitored. CONSTITUTION:An operating condition monitoring means C1 for the controller of a control motor monitors servo system feedback information of a control motor SM to be monitored. An input modifying means C2 modifies the electrical input SI of an objective control motor SM in a plurality of control motors SM from the result of monitoring through the operating condition monitoring means C1.

公开(公告)号：JPH0255593A

公开(公告)日：1990-02-23

申请号：JP20689488

申请日：1988-08-20

Applicant: TOYOTA MOTOR CORP

Inventor： KAWABATA YASUMI ,  INAGAKI ATSUHITO

IPC: H02P5/46

Abstract: PURPOSE:To stabilize the quality, such as the machining accuracy, of a driving object at a high level by detecting the displacement between a driven object and the drive shaft of a control motor and grasping the actual driving condition of the driven object then controlling the control motor form the grasped driving condition. CONSTITUTION:A displacement detecting means C1 for the controller of the control motor detects relative displacement between the drive shaft of a predetermined control motor SM in a plurality of control motors SM and an object to be driven through the control motor. An input modifying means C2 modifies the electrical input SI of the objective control motor SM from the detection result of the displacement detecting means C1.

公开(公告)号：JPH01305314A

公开(公告)日：1989-12-08

申请号：JP13609288

申请日：1988-06-02

Applicant: TOYOTA MOTOR CORP

Inventor： OOYA EIJI ,  MIYATANI TAKAO ,  KAWAMURA KEIJI ,  KAWABATA YASUMI

IPC: G01D5/249

Abstract: PURPOSE:To attain miniaturization and to measure precisely an angle of rotation and the number of rotations by providing separate means to detect an absolute signal, an incremental signal and a reference position signal for a rotary disk and a fixed plate respectively. CONSTITUTION:An absolute (or incremental) signal detecting means outputs signals showing higher-order 8 bits b8-b15 (or lower-order 7 bits b1-b7) of an angle of rotation, and the angle of rotation is detected roughly (or finely) from these signals. A reference position detecting means is constructed by providing an annular magnet 26 having a reference position pattern recorded thereon in juxtaposition on the back surface of a rotary disk 14. A variation in a magnetic pattern of the magnet 26 is detected by magnetism detecting elements 28A and 28B, reference position signals ZA and ZB thereof are made to be 9-bit signals B1-B9, higher-order 8 bits B1-B8 are corrected subsequently by the lowest-order bit of the 9-bit signals and the highest-order bit b15 of the rotation angle signals, and the corrected bits are taken as the number of rotations. Accordingly, the correct number of rotations is obtained when pulses obtained by the signals ZA and ZB are found at a position whereat the highest- order bit b15 of the rotation angle signals is not varied.

公开(公告)号：JPS63108225A

公开(公告)日：1988-05-13

申请号：JP25324886

申请日：1986-10-24

Applicant: TOYOTA MOTOR CORP

Inventor： KAWABATA YASUMI

IPC: G01D5/249 ,  G01D5/245

Abstract: PURPOSE:To obtain a reliable detection board which never performs misdetection by forming an annular pattern of a such a magnetized body that the magnetized body has boundary parts between N and S poles extending the radial direction into two in the circumferential direction and the N and S poles differ in magnetic flux direction in the peripheral direction of respective annular patterns according to the logical level of a signal. CONSTITUTION:The respective annular patterns 2A-2D are made of magnetized bodies, which have the boundary parts between the N and S poles extending in the circumferential direction while dividing the radial direction into two; and the N and S poles are formed by magnetization wherein the magnetic flux direction is made different in the peripheral direction of the respective annular patterns 2A-2D according to the logical level of the signal. Consequently, whether the logical level is '0' or '1' in the peripheral direction of each annular pattern can be decided by detecting which direction magnetic flux flows in an to the radial direction of the annular pattern.

公开(公告)号：JPS59157713A

公开(公告)日：1984-09-07

申请号：JP3055683

申请日：1983-02-25

Applicant: Toyota Motor Corp

Inventor： HASEGAWA KAZUHIKO ,  UCHISHIBA IZUMI ,  TAMANO SUSUMU ,  SATOU YOSHIMASA ,  KAWABATA YASUMI

IPC: B23K7/00 ,  G05B19/4093

CPC classification number: G05B19/40931 ,  G05B2219/35287 ,  Y02P90/265

Abstract: PURPOSE:To attain an NC fusing machine where it is unnecessary to pay attention to a complicated NC code by inputting only coordinates of inflection points attained from a working drawing, a simple working shape, and the plate thickness of a work to generate NC data automatically. CONSTITUTION:X-Y coordinates are taken on a basis of the working drawing, and coordinate values of inflection points are obtained and are converted to data in accordance with a prescribed rule table. As an example, the code for cutting the work from the current point to coordinates (200, 300) along an arc (radius 150) is ''arc 200;300;150''. Next, a ''data generation'' mode is selected from a key group 16d for operation, and a numeric key group 16a and the first and the second character key groups 16b and 16c are operated to input data in accordance with steps. A ''drawing display'' mode is set for the purpose of checking whether this inputted drawing data is correct or not, and a drawing 17 is displayed on a drawing display part 18.

Abstract translation: 目的：为了获得NC定影机，只需输入从工作图中获得的拐点的坐标，简单的工作形状和自动生成NC数据的工件的板厚，就不需要注意复杂的NC代码 。 构成：基于工作图进行X-Y坐标，获得拐点的坐标值，并根据规定的规则表转换为数据。 作为示例，用于将工件从当前点沿坐标（200,300）沿弧线（半径150）切割的代码是“弧200; 300; 150”。 接下来，从用​​于操作的键组16d中选择“数据生成”模式，并且操作数字键组16a和第一和第二字符键组16b和16c以根据步骤输入数据。 为了检查该输入的图形数据是否正确而设定了“绘图显示”模式，并且在绘图显示部分18上显示图形17。