公开(公告)号：JPH1066314A

公开(公告)日：1998-03-06

申请号：JP21448896

申请日：1996-08-14

Applicant: TOYOTA MOTOR CORP

Inventor： FUJI TAKAJI ,  KAWABATA YASUMI ,  MIURA TETSUYA

IPC: H02K15/085 ,  H02K15/04 ,  H02K15/06

Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a stator of a motor by which slot-inserted parts of a stator can be located in slots efficiently and the other parts than inserted in the slots are let to project less and therefore the size of a motor can be reduced and the stator can be assembled in the motor easily and does not interfere with coil pieces. SOLUTION: After a flat-type wire is wound by a specified number of turns, slot-inserted sections (coil sides) 12, 14 are clamped separately. By rotating one of the slot-inserted sections by 180 deg. in the direction at right angles with the winding direction, twisted sections are formed in coil ends 16, 18. With the twisted sections being located parallelly, the coil sides 12, 14 are inserted into specified slots successively. Since the twisted sections are inclined toward the shaft direction of a stator core, the core projects less out of the stator core and thereby a stator can be made small. Furthermore, since the twisted sections of adjacent coil pieces are located nearly parallel with each other, an installation area can be reduced. The coil pieces 10 are not brought into contact with each other and thereby the coating of the flat-type wire is prevented from being damaged.

公开(公告)号：JPH0946965A

公开(公告)日：1997-02-14

申请号：JP22586995

申请日：1995-08-09

Applicant: TOYOTA MOTOR CORP

Inventor： TAGA YOSHIAKI ,  KAWABATA YASUMI ,  YAMADA EIJI ,  MIYATANI TAKAO ,  MIZUTANI RYOJI

IPC: H02K7/11 ,  B60K6/20 ,  B60K6/448 ,  B60K6/52 ,  B60K17/356 ,  B60K23/08 ,  B60L7/14 ,  B60L50/15 ,  B60L50/16 ,  B60W10/06 ,  B60W10/08 ,  B60W10/26 ,  B60W10/30 ,  B60W20/00 ,  H02K51/00

Abstract: PROBLEM TO BE SOLVED: To output torque in a direction equal to the rotating direction of an output shaft of a prime mover by highly efficiently transmitting or utilizing power obtained from the prime mover. SOLUTION: A clutch motor 30 has an outer rotor 32 connected to a crank shaft 56 of a prime mover 50 and an inner rotor 34 connected to a drive shaft 22. An assisting motor 40 has a rotor 42 coupled with a drive shaft 22. These motors 30 and 40 controlled by a controller 80. If a current is applied to a three-phase coil 36 of a clutch motor 30, and the outer rotor 32 and the inner rotor 34 are coupled to each other with a predetermined slip, then the energy for slipping is recovered in the form of electric energy through a first driven circuit 91. If an assisting motor 40 is controlled through a second drive circuit 92 by using the power stared above, then a torque is given to the drive shaft 22 by the assisting motor 40.

公开(公告)号：JPH08331884A

公开(公告)日：1996-12-13

申请号：JP15543195

申请日：1995-05-29

Applicant: TOYOTA MOTOR CORP

Inventor： KAWABATA YASUMI ,  TAGA YOSHIAKI

IPC: B60L11/18 ,  B60L15/02 ,  H02P6/06 ,  H02P6/08 ,  H02P6/10 ,  H02P6/17 ,  H02P6/182 ,  H02P6/28 ,  H02P21/00 ,  H02P21/05 ,  H02P21/18 ,  H02P21/22 ,  H02P21/24 ,  H02P21/28 ,  H02P23/04 ,  H02P25/02 ,  H02P27/04 ,  H02P27/08

Abstract: PURPOSE: To control an output torque in accordance with an electrical angle by a method wherein, when the absolute values of respective phase currents are expressed by sine waves, the increase/decrease correction is applied over a certain period before and after an electrical angle at which the absolute value is maximum and, further, the phase currents other than the phase current to which the correction is applied are also subjected to the increase/decrease correction so as to have all the phase currents are balanced as a whole. CONSTITUTION: A correction calculating unit 12 corrects an external current command in accordance with the load status of a synchronous mode 40, etc., and performs the calculation to correct the respective phase currents of the synchronous mode 40. The difference between the output of the correction calculating unit 12 and the output of a 3 phase/2-phase conversion unit 18 is calculated and the calculated result is used for control as a feedback quantity. In accordance with the detected electrical angle, when the absolute values of respective phase currents are expressed by sine waves, the increase/decrease correction is applied over the ±180 deg./2n period of the electrical angle at which the absolute value is maximum so as to have the maximum value of the sine wave as an upper limit. At the same time, the phase currents other than the phase current to which the correction is applied are also subjected to the increase/decrease correction so as to have all the phase currents are balanced as a whole.

公开(公告)号：JPH08205437A

公开(公告)日：1996-08-09

申请号：JP2753195

申请日：1995-01-23

Applicant: TOYOTA MOTOR CORP ,  TOYOTA CENTRAL RES & DEV

Inventor： KAWABATA YASUMI ,  YAMADA EIJI ,  MIURA TETSUYA ,  ARAKAWA TOSHIFUMI ,  INAGUMA YUKIO

IPC: H02K1/08 ,  H02K1/27 ,  H02K21/16

Abstract: PURPOSE: To obtain a three-phase synchronous motor employing permanent magnets and utilizing the reluctance torque by providing salient poles in which steep variation in the density of flux passing through the salient pole is prevented as the motor rotates. CONSTITUTION: At the abutting part of a permanent magnet 51 and a salient pole 71, the inner peripheral end part of the permanent magnet 51 is rounded at a predetermined radius of curvature and the outer circumferential end part of the salient pole 71 is rounded at a predetermined curvature. Consequently, the flux passing through the salient pole 71 passes through the corner of the permanent magnet 51 easily and variation in the density of flux passing the back side in the rotational direction of the salient pole 71 is suppressed. This structure prevents steep variation of flux density at the salient pole 71 and suppresses energy loss due to steep variation of flux density and heating. The outer circumferential end part of the salient pole may not be rounded but may be composed of a low permeability member.

公开(公告)号：JPH07177788A

公开(公告)日：1995-07-14

申请号：JP23850094

申请日：1994-09-05

Applicant: TOYOTA MOTOR CORP

Inventor： KAWABATA YASUMI ,  YAMADA EIJI ,  MIURA TETSUYA ,  TAGA YOSHIAKI

IPC: H02P6/16 ,  B60L11/18 ,  B60L15/02 ,  H02P6/06 ,  H02P6/08 ,  H02P6/182 ,  H02P6/185 ,  H02P6/21 ,  H02P6/22 ,  H02P6/28 ,  H02P6/20

Abstract: PURPOSE:To accurately and easily detect an electrical angle even if a rotor is still for practical control by detecting at least two current behaviors determined by the inductance of a coil winding which is correlated with the electrical angle and then determining the position of the rotor by referring to the relationship between the current behavior and the electrical angle being stored in advance. CONSTITUTION:A CPU 120 outputs a predetermined signal to a voltage application part 130 and applies a specific voltage between the terminals U and VW of a motor 40, takes in the output of a current detector 102 via an ADC 112, and then measures the lapse time until U-phase current reaches a specific value. Then, a specific voltage is applied between the terminals V and WU similarly and the lapse time until V-phase current reaches a specific value is measured. Then, an electrical angle is obtained by referring to a table stored in a memory 122 in advance from these two lapse times. The electrical angle signal is output to a motor control circuit 100 and is used to set the phase of a signal applied to each phase as the position information of a rotor when starting a motor 40.

公开(公告)号：JPH07143714A

公开(公告)日：1995-06-02

申请号：JP31116293

申请日：1993-11-16

Applicant: TOYOTA MOTOR CORP

Inventor： KAWABATA YASUMI ,  YAMADA EIJI ,  MIURA TETSUYA

IPC: H02K21/14 ,  H02K1/16

Abstract: PURPOSE:To restrain the generation of torque ripples and to restrain the pulsation of an output torque. CONSTITUTION:A permanent magnet-type sunchronous motor 10 is provided with a rotor 30 and a stator 50. The rotor 30 is provided with permanent magnets 41 to 44. The stator 50 is provided with tooth parts 54, and a coil which geenrates a rotating magnetic field in the stator 50 is wound between the individual tooth parts 54. In addition, the inner circumferential side of the tooth parts 54 is provided with a cylindrical cylinder 58. The cylinder 58 is welded in a state that it has been brought into contact with tip ends of all the tooth parts 54. By this constitution, even when the escape position of a magnetic flux from the permanent magnets 41 to 44 is situated in gaps between the tooth parts 54, the magnetic flux escapes to the nearest tooth part 54 through the cylindrical cylinder 58. As a result, the magnetic flux is not cut in the gaps between the tooth parts 54, and a change in the magnetic flux becomes gentle.

公开(公告)号：JPH07143694A

公开(公告)日：1995-06-02

申请号：JP30731293

申请日：1993-11-11

Applicant: TOYOTA MOTOR CORP

Inventor： MIURA TETSUYA ,  KAWABATA YASUMI ,  YAMADA EIJI

IPC: H02K1/24 ,  H02K1/27 ,  H02K19/10 ,  H02K21/14

Abstract: PURPOSE:To amplify the output torque of a synchronous motor by examining the positional relation between a permanent magnet and salient pole and making the peak time of magnet torque coincident with that of reluctance torque. CONSTITUTION:A three-phase synchronous motor is equipped with a stator 30 and rotor 20. The rotor 24 constituting the rotor 20 has two salient poles 51 and 52. The position of the salient pole 51 is shifted from the position of a permanent magnet 26 by 45 deg. in electrical angle in the rotating direction of the rotor 20. When the synchronous motor is constituted in such a way, the peak time of magnet torque can be made coincident with that of reluctance torque.

公开(公告)号：JPH0759280A

公开(公告)日：1995-03-03

申请号：JP21819093

申请日：1993-08-09

Applicant: TOYOTA MOTOR CORP

Inventor： KAWABATA YASUMI ,  YAMADA EIJI ,  MIURA TETSUYA

IPC: H02K1/27 ,  H02K19/10 ,  H02K21/14

Abstract: PURPOSE:To prevent the leakage of magnetic flux due to the permanent magnet of an inner magnet type synchronous motor and to enhance the degree of freedom of designing. CONSTITUTION:Permanent magnets 51 and 54 are laid out at positions for dividing a rotor 50 into four parts and then a plurality of slits 70 are provided at a rotor 57 nearly vertically to the magnetic pole surface of the permanent magnet 51 or 54. The slit is formed to be longer at the outer-periphery side in diameter direction and shorter at the inner-periphery side. With this configuration, magnetic flux can be guided by the slit 70 with the permanent magnet 51 or 54, thus preventing leakage to the side of a stator 30 at an unneeded position and increasing the magnetic flux contributing to an output torque. As a result, the output torque of a synchronous motor 40 can be increased.

公开(公告)号：JPH0483118A

公开(公告)日：1992-03-17

申请号：JP19630390

申请日：1990-07-26

Applicant: TOYOTA MOTOR CORP

Inventor： OOYA EIJI ,  KAWABATA YASUMI

IPC: G01D5/245 ,  G01D5/244 ,  G01D5/249 ,  G01P3/487

Abstract: PURPOSE:To precisely synthesize rotating number with rotating angle by building up and falling the output of the counter of a multiple rotation detecting part synchronously with the fall timing of the top column of a rotary encoder. CONSTITUTION:A reset signal to a rotating number counter part 94 and a control signal are transmitted from a rotary encoder converter to a circuit base by a cable through terminals 211, 201 and through terminals 213, 203, respectively. On the other hand, the rotating number converted to serial signal, the absolute value of rotating angle similarly converted to serial signal, a timing signal, and a two-phase inclement pulse are transmitted from the circuit base to the rotary encoder converter by the cable through terminals 202, 212, through terminals 204, 214, through terminals 205, 215, and through 206, 207, 216, and 217, respectively. Thus, even if the detecting precision of a multiple rotation detecting part is such that one rotation of a rotating shaft can be recognized, the same precision as the time of detecting one rotation by the rotary encoder can be kept.

公开(公告)号：JPH02101997A

公开(公告)日：1990-04-13

申请号：JP25106588

申请日：1988-10-05

Applicant: TOYOTA MOTOR CORP

Inventor： KAWABATA YASUMI ,  MIZUTANI RYOJI

IPC: H02P27/06

Abstract: PURPOSE:To enable production of desired torque by calculating the compensation amount of current phase and voltage based on a relation of the current phase and voltage with respect to the rotary speed of a servo motor then correcting a current command value. CONSTITUTION:A state detecting means M2 detects the rotary speed of a servo motor M1 which is employed, in a current compensation amount determining means M5, for estimating the positional delay of actual current from a current command value, and the phase of the current command value calculated through a current command value calculating means M3 is advanced by the amount corresponding to the delay through a current command value correcting means M7. Consequently, the phase delay of the actual current to the rotary position of the motor M1 is eliminated. Furthermore, a voltage compensation amount determining means M6 estimates voltage drop due to induced voltage and a current command value correcting means M7 increments the current command value correspondingly. By such arrangement, droppage of current due to induced voltage can be compensated and the current can be controlled such that desired torque will be produced.