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公开(公告)号：JPH08308286A
公开(公告)日：1996-11-22
申请号：JP13739595
申请日：1995-05-10
Applicant: TOYOTA MOTOR CORP
Inventor： KAWABATA YASUMI , TAGA YOSHIAKI
Abstract: PURPOSE: To control a synchronous motor by detecting the rotary angle of a rotor without sensor and using it in the motor having salient poles. CONSTITUTION: The currents Iu, Iv flowing in stator coils are detected, and the rotary angle is estimated by a rotary angle estimating unit 16 from the currents Iu, Iv. This estimation is conducted by utilizing the fact that the model of a synchronous motor 40 is provided in a synchronous motor controller 10, the deviation Δθ between the rotary angle of the model and the real rotary angle is proportional to the deviation of the actual Id current of the motor and the current of the model, and the deviation of the angular velocity of rotation of the motor is proportional to the difference between the real current Iq of the motor and the current of the model. The angular velocity of rotation is decided to be actually not largely changed, and can be obtained as a moving mean. In this case, the sampling time is reduced, and the calculating accuracy can be improved.
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公开(公告)号：JPH0880014A
公开(公告)日：1996-03-22
申请号：JP21014994
申请日：1994-09-02
Applicant: TOYOTA MOTOR CORP
Inventor： KAWABATA YASUMI , MIURA TETSUYA , MIYATANI TAKAO
Abstract: PURPOSE: To provide apparatus and method capable of preventing the positional deviation of comb teeth by preventing the occurrence of folds or cracks in an equipment for producing a stator core by winding and laminating a strip- shaped material having sinking comb teeth. CONSTITUTION: A base portion 14 of a strip-shaped material 10 is pressured by dies 18 and extended by a predetermined amount in the longitudinal direction. At this time, the pressuring amount is adjusted in such a manner that the amount of elongation increases at the outer portion after being wound round. By doing this, the strip-shaped material 10 is bent and the winding can be performed without creating folds or cracks. Also, projected stripes are provided in parallel to the cylindrical shafts on the outer periphery of a winding jig 12 of a cylindrical shape and the position of the comb teeth of the strip-shaped material 10 is restricted by this projected stripes.
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公开(公告)号：JPH0875831A
公开(公告)日：1996-03-22
申请号：JP20892894
申请日：1994-09-01
Applicant: TOYOTA MOTOR CORP
Inventor： SUGA YASUSHI , KAWABATA YASUMI
Abstract: PURPOSE: To accurately analyze behavior of a motor with actually measured information. CONSTITUTION: Prior to test of a motor correlation between a current instruction I* and motor current IM, response of the motor current IM to variation ΔI* of the current instruction I*, correlation between the current instruction I* and motor torque T, temperature characteristics of the motor torque T, the relation between the motor torque T and motor efficiency and between the revolution number N and the motor efficiency, and the like are measured as the basic characteristics of the motor under testing. Effect of disturbance such as response delay and temperature of a evaluation device and its measuring sensors is included in the measured basic characteristics. By correcting information collected during testing by using the basic characteristics measured while the current instruction I* is used as a time reference, influence of response delay can be removed.
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公开(公告)号：JPH07298528A
公开(公告)日：1995-11-10
申请号：JP8823794
申请日：1994-04-26
Applicant: TOYOTA MOTOR CORP
Inventor： KAWABATA YASUMI , MIYATANI TAKAO , YAMADA EIJI , MIURA TETSUYA
Abstract: PURPOSE:To provide a motor having high efficiency and workability by increasing the effective magnetic circuit area of a ties while sustaining high space factor of coils. CONSTITUTION:Slit-like slots 20 are made in the stator core 12 in order to increase the width of a ties 18 thus increasing the effective magnetic circuit area thereof significantly and obtaining a highly efficient motor. A formed coil body 16 inserted into each slot 20 is formed of a rectangular coil 14 having predetermined number of turns. The rectangular coil 14 has substantially square cross-section and the side thereof is substantially equal to the width of slit-like slot. The rectangular coil 14 is arranged in a row in the rear of the slot with the coil end being bent. This structure maximizes the space factor of the formed coil body 16 in the slot 20 and makes compact the coil end.
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公开(公告)号：JPH0767272A
公开(公告)日：1995-03-10
申请号：JP23569893
申请日：1993-08-26
Applicant: TOYOTA MOTOR CORP
Inventor： KAWABATA YASUMI , MIURA TETSUYA , KUBO KAORU
Abstract: PURPOSE:To reduce iron loss by employing an oriented electromagnetic steel plate in place of a non-oriented electromagnetic steel plate in a stator formed by laminating electromagnetic steel plates and to facilitate manufacture of the stator structure. CONSTITUTION:Yokes and teeth constituting a stator are split and the yoke is further split in the peripheral direction. The yoke pieces 20, 21 and the pieces 22, 23 are formed of an oriented electromagnetic steel plate such that the yoke pieces 20, 21 have easy direction of magnetization in the peripheral direction and the teeth pieces 22, 23 have easy direction of magnetization in the radial direction. The yoke pieces and the teeth pieces are jointed alternately in the laminating direction. Consequently, the direction of flux in the yoke pieces 20, 21 and teeth pieces 22, 23 is aligned with the easy direction of magnetization of oriented electromagnetic steel plate and thereby the iron loss is reduced and the efficiency of a motor 40 is enhanced.
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Patent Agency Ranking
公开(公告)号：JPH06327206A
公开(公告)日：1994-11-25
申请号：JP10855393
申请日：1993-05-10
Applicant: TOYOTA MOTOR CORP
Inventor： KAWABATA YASUMI , MIURA TETSUYA
Abstract: PURPOSE:To provide a PM type synchronous motor in which high torque and high speed rotation can be achieved. CONSTITUTION:This PM type synchronous motor has a rotor 6 in which a plurality of permanent magnets 7 are provided in circumferential form and a stator 1 in which a plurality of excitation coils 3 are provided in coaxial form with respect to the rotor 6. A spacer 9 is provided between the adjacent permanent magnets 7, thereby reducing the magnetic reluctance of magnetic flux due to a magnetizing current. Thereby, the number of magnetic flux due to the magnetizing current is increased and consequently the attraction and repulsion between the stator 1 and the rotor 6 are increased, so that the torque of the stator 1 and the rotor 6 may be increased and the high-speed rotation of the rotor 6 may be achieved.
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公开(公告)号：JPH0483115A
公开(公告)日：1992-03-17
申请号：JP19630090
申请日：1990-07-26
Applicant: TOYOTA MOTOR CORP
Inventor： OOYA EIJI , KAWABATA YASUMI
Abstract: PURPOSE:To divide one rotation to 2 as the whole of a hybrid encoder and keep a detectable precision by synchronizing the built up and fall of an absolute valve as an inclement value as a standard. CONSTITUTION:The absolute value of a rotating angle transmitted by serial signal is converted into a 8-bit parallel signal by a serial-parallel converter 2030, and then converted to a 8-bit binary code representation by a Gray code- binary code converter 3050. A pulse generated on the basis of an inclement pattern is counted as a clock by an inclement counter 3030, and latched by an inclement value latch circuit 3040 as a 8-bit count value. In a logic integrator 3051, the AND of the lowest column signal (a) of the output of the converter 3050 and the negative signal of the top column signal (b) of the circuit 3040 is calculated, and in a synchronous adding circuit 3052, the output (c) of the logic adding machine is added to the seventh column of the output of the converter 3050.
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公开(公告)号：JPH0386091A
公开(公告)日：1991-04-11
申请号：JP22061989
申请日：1989-08-28
Applicant: TOYOTA MOTOR CORP
Inventor： KAWABATA YASUMI , MIZUTANI RYOJI , YAMADA EIJI
IPC: H02P29/00
Abstract: PURPOSE:To realize high speed response of an output torque by compensating an exciting current to be supplied to a servo motor by a differentiator responsive to a detected time constant. CONSTITUTION:A differentiation compensator C2 differentiates to compensate an exciting current IF to be supplied to a servo motor SV by a differentiator responsive to the time constant of an exciter FC of the motor SV detected by detecting means C1. That is, the compensator C2 presumes the delay amount of a phase generated in the current IF by the real time constant of the exciter FC of the motor SV, and advances the phase of the current IF by the differentiation compensation matched thereto. Accordingly, the phase delay of the current IF of the motor SV, i.e., the delay of the output torque can be eliminated.
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公开(公告)号：JPH0370487A
公开(公告)日：1991-03-26
申请号：JP20360989
申请日：1989-08-04
Applicant: TOYOTA MOTOR CORP
Inventor： KAWABATA YASUMI , MIZUTANI RYOJI , YAMADA EIJI
IPC: H02P29/00
Abstract: PURPOSE:To facilitate incorporation of a servo system and to minimize the influence of a malfunction by providing exciting current detecting means for phases of a servo motor, means for sequentially storing the detected result, and means for outputting a detected result by a request from an external device. CONSTITUTION:The drive of a servo motor 20 is controlled by a logic circuit having a high speed CPU 10a and a CPU 10b as a center, and a controller 10 has a feedback control type. Current detecting coils 22, 24 for measuring an exciting current for detecting a torque, and an encoder 26 for detecting a rotating position, a rotating speed are provided. A control program for forming a servo system of the first ROM 10d, the second ROM 10e of the controller 10. Thus, incorporation with the servo system can be facilitated, and influence of a malfunction can be minimized.
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公开(公告)号：JPH02193558A
公开(公告)日：1990-07-31
申请号：JP949689
申请日：1989-01-18
Applicant: TOYOTA MOTOR CORP
Inventor： KAWABATA YASUMI
IPC: H02K29/00
Abstract: PURPOSE:To improve efficiency by a method wherein an armature coil is arranged independently from other windings, arranged continuously, so as not to be intersected and four pieces of magnets, which is larger than the number of phase of three-phase AC by one, are arranged in the spaces of respective phases while converting the polarities of the same. CONSTITUTION:A plurality of slots 24a is formed on the inner peripheral surface of an armature core 24, forming an armature 22, and armature coils 20 are wound in the slots. The coil 26 is arranged independently from other coils, arranged continuously, so as not to be intersected. A plurality of permanent magnets 34 is arranged on the outer peripheral surface of a rotor core 32 while converting the polarities thereof alternately to form a field. The field is formed by arraying four pieces of permanent magnets, which means a number consisting of the number of phases 3 of 3-phase AC plus one, in every spaces of respective phases of the armature. According to this method, a magnetic field, produced by one set of winding, will never be cancelled by another magnetic field, produced by the other winding, and a magnetic resistance between the armature and the field is constituted so as to be small whereby a rotary armature, having a high efficiency, can be obtained.
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