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1. 发明专利

JPH10295065A SINGLE-PHASE INDUCTION MOTOR 失效
公开(公告)号：JPH10295065A
公开(公告)日：1998-11-04
申请号：JP10003497
申请日：1997-04-17
申请人： HITACHI LTD , HITACHI TAGA MOTOR KK
发明人： YASUJIMA TOSHIYUKI , TAWARA KAZUO , MORIYAMA KAZUYOSHI , KONNO TAKEO , MIYASHITA KUNIO
IPC分类号： H02K1/16 , H02K17/08
摘要： PROBLEM TO BE SOLVED: To reduce the wire diameter of a winding the consumption amount of copper for the winding, and the cost by a method, wherein an inside main winding and an outside main winding are arranged concentrically around the magnetic pole of a main winding and an inside auxiliary winding and an outside auxiliary winding are arranged concentrically around the magnetic pole of an auxiliary winding. SOLUTION: In a main winding 10, an inside winding 10A which is wound at two-slot pitches and an outside winding 10B which is wound at four-slot pitches are wound around a curved teeth part. In an auxiliary winding 11, an inside winding 11A which is wound at two-slot pitches and an outside winding 11B which is wound at four-slot pitches are wound around the curved teeth part in such a way that the auxiliary winding 11 is deviated by an electrical angle of 90 deg. (a mechanical angle of 45 deg.) from the main winding 10. Thereby, the overlap of the coil end of the main winding 10 with the coil end of the auxiliary winding 11 is eliminated, and the length in the axial direction of a stator can be made short. At the same time, the circumferential length of the windings can be made short, and the resistance value of the windings can be reduced. The wire diameter of the windings can be made small according to the reduction portion of the resistance value of the windings, and the consumption amount of copper for the windings can be reduced.

2. 发明专利

JPH10295064A SINGLE-PHASE INDUCTION MOTOR 失效
公开(公告)号：JPH10295064A
公开(公告)日：1998-11-04
申请号：JP10003297
申请日：1997-04-17
申请人： HITACHI LTD , HITACHI TAGA MOTOR KK
发明人： YASUJIMA TOSHIYUKI , TAWARA KAZUO , MORIYAMA KAZUYOSHI , KONNO TAKEO , MIYASHITA KUNIO
IPC分类号： D06F37/30 , H02K1/16 , H02K17/08
摘要： PROBLEM TO BE SOLVED: To reduce the wire diameter of a winding and the consumption amount of copper for the winding by a method, wherein an inside main winding and an outside main winding are arranged concentrically around an upright teeth part on the side of a main winding and an inside auxiliary winding, and an outside auxiliary winding are arranged concentrically around an upright teeth part on the side of an auxiliary winding. SOLUTION: In a main winding 10, an inside winding 10A which is wound at three- slot pitches and an outside winding 10B which is wound at five-slot pitches are wound around a straight teeth part. In an auxiliary winding 11, an inside winding 11A which is wound at three-slot pitches and an outside winding 11B which is wound at five-slot pitches are wound around a straight teeth part, in such a way that the auxiliary winding is deviated by an electrical angle of 90 deg. (by a mechanical angle of 45 deg.) from the main winding 10. Thereby, the overlap of the coil end part of the main winding 10 with the coil end part of the auxiliary winding 11 is eliminated, and the length in the axial direction of a stator can be made short. At the same time, the circumferential length of the windings can be made short, and the resistance value of the windings can be made small. The wire diameter of the windings can be made small, according to the reduction portion of the resistance value of the windings.

3. 发明专利

JPH07217592A ELECTRIC MOTOR 失效
公开(公告)号：JPH07217592A
公开(公告)日：1995-08-15
申请号：JP908494
申请日：1994-01-31
申请人： HITACHI LTD , HITACHI TAGA MOTOR KK
发明人： NAKAI TAKAHIRO , TOYOSHIMA HISANORI , KIHARA MANABU , OGAWA FUMIHIRO , JORAKU FUMIO , GOMITA HISAMITSU , MIYASHITA KUNIO
IPC分类号： F04D29/053 , F04D29/04
摘要： PURPOSE:To prevent the occurrence of bending of a rotary shaft owing to varnish processing on the rotor of an electric motor and to reduce the generation of vibration and noise owing to the bending of the rotary shaft when the electric motor is operated. CONSTITUTION:An insulating cylinder with which a rotary shaft 7 is covered and which has one end side making contact with an armature core 11 and a patch 13 fitted in the outer periphery of the insulating cylinder and making contact with the end face of the armature core are arranged on both sides of the end face in an axial direction of the armature core. A gap is provided between the rotary shaft 7 and the inner periphery. Since the gap is provided between the rotary shaft 7 and the inner periphery of the insulating cylinder, even when a deviation occurs to the contraction force of varnish, the contraction force is absorbed by bending of the insulating cylinder into the gap, the generation of the stress of the rotary shaft 7 is reduced, and bending of the rotary shaft 7 is prevented from occurring. Thereby, an electric blower 1 to reduce the generation of vibration and noise without increasing a rotation balance owing to eccentricity of the rotary shaft 7 is provided.

4. 发明专利

JPH01286758A PERMANENT MAGNET TYPE SYNCHRONOUS MOTOR 失效
公开(公告)号：JPH01286758A
公开(公告)日：1989-11-17
申请号：JP11469788
申请日：1988-05-13
申请人： HITACHI LTD , HITACHI TAGA MOTOR KK
发明人： MATSUBAYASHI JUN , TAJIMA FUMIO , MIYASHITA KUNIO , TAKADA KAZUAKI , KUBOKURA KUNIAKI , TOYODA EIJI
IPC分类号： H02K21/14 , H02K29/08
摘要： PURPOSE:To increase a torque at the time of start by interposing a protrusion partly protruding from a rotor core between permanent magnets, and differentiating the widths from the pitch of the slots of a stator. CONSTITUTION:The rotor 101 of a permanent magnet type synchronous motor is composed of permanent magnets 102, a rotor core 103, a motor shaft 105, etc. In this case, protrusions 103A (4 positions) partly protruding from the outer periphery of the core 103 made of a high permeability material are interposed between the magnets 102. The outer periphery of the protrusion 103A is disposed in the same plane as those of the outer peripheries of the magnets 102. The protrusion 103A is composed of a laminated silicon steel plate of the same material as that of the core 103, and has higher permeability than that of the magnet 102. Thus, the protrusion 103A has a magnetism collecting effect to increase the quantity of magnetic fluxes to a stator when a large current flows. As a result, torque characteristic is improved, and a cogging torque is decreased.

5. 发明专利

JPH08237985A MOTOR DRIVER 失效
公开(公告)号：JPH08237985A
公开(公告)日：1996-09-13
申请号：JP3647095
申请日：1995-02-24
申请人： HITACHI LTD , HITACHI TAGA MOTOR KK
发明人： YASUJIMA TOSHIYUKI , TAWARA KAZUO , MIYASHITA KUNIO , GOMITA HISAMITSU , KONNO TAKEO , MORIYAMA KAZUYOSHI
IPC分类号： H02P25/04 , H02P21/02 , H02P21/04 , H02P21/14 , H02P21/18 , H02P21/20 , H02P21/24 , H02P21/34 , H02P23/02 , H02P23/03 , H02P23/07 , H02P23/14 , H02P23/16 , H02P23/24 , H02P27/02 , H02P5/402
摘要： PURPOSE: To obtain an appropriate torque while minimizing the input power by simulating the speed-torque characteristics of a motor to detect the torque of the motor and then switching a plurality of capacitors depending on the torque. CONSTITUTION: A characteristics simulator 30 stores motor characteristics corresponding to the capacity of capacitor and determines the torque TO1-TO3 of each characteristics from the rotational speed N. A torque setter 34 estimates the load torque level TR from the load mode MOD. A comparator 31 compares the load torque level TR with the torque TO1-TO3 of each characteristics and selects the minimum operable characteristics. A characteristics switch 32 generates a signal providing a capacitance for realizing the selected characteristics and delivers gate signals G1, G2 through a drive circuit. A signal for determining the rotational direction based on a rotational direction command AL is then generated from a signal generator 33 and gate signals G3, G4 are delivered through the drive circuit 35.

6. 发明专利

JPH0812002A CRUSHING AND VOLUME REDUCING MACHINE 失效
公开(公告)号：JPH0812002A
公开(公告)日：1996-01-16
申请号：JP14600894
申请日：1994-06-28
申请人： HITACHI LTD , HITACHI TAGA TECH KK , HITACHI TAGA MOTOR KK
发明人： HIROSE ETSURO , MIYASHITA KUNIO , GOMITA HISAMITSU
IPC分类号： B65F1/10 , B02C18/00 , B30B9/32 , B02C18/40
摘要： PURPOSE:To facilitate the cutter mounting/demounting work and improve the maintenance performance of a crusher, by holding a cutter unit on a box-shaped cutter base arranged below a hopper body. CONSTITUTION:A main spindle 25 on which cutters 24 and 26 are installed and a driven shaft constitute a cutter unit 22 whose both ends are axially supported by a peir of side plates 32 and 33, and can be demounted as unit from a cutter base 21, and disassembly work is facilitated. Further, after the cutter units 24 and 26 are polished, the unit 22 is assembled by utilizing the side plates 32 and 33, and incorporated to the cutter base 21 of the body, and since the adjustment of the gap between the cutters 24 and 26 can be carried out in the assembled state to the unit, the workability can be improved. Accordingly, the cutter is formed to a unit, and incorporated in a unit state into a crusher body, and since disassembly is facilitated, the maintenance performance is improved drastically.

7. 发明专利

JPH04207951A PERMANENT MAGNET-TYPE SYNCHRONOUS MOTOR AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH04207951A
公开(公告)日：1992-07-29
申请号：JP32918890
申请日：1990-11-30
申请人： HITACHI LTD , HITACHI TAGA MOTOR KK
发明人： MATSUBAYASHI JUN , TAKADA KAZUAKI , TAJIMA FUMIO , MIYASHITA KUNIO , KUBOKURA KUNIAKI , WATANABE TAKASHI
IPC分类号： H02K29/08 , H02P6/22 , H02P6/30
摘要： PURPOSE:To conduct forward and reverse rotational operation efficiently by grasping the phase shift amount preliminarily and by outputting the conduction of a stator while shifting input of the normal and reverse rotational operation command to a driving circuit from the input of a rotary magnetic pole detecting signal. CONSTITUTION:In a salient pole-structured rotor, a machine load control circuit 10 starts control of the machine load 7 and commands a location.speed control circuit 5 to start rotation control after it receives an operation command from an operation command circuit 11. The location.speed control circuit 5 controls a motor 1 so that the speed of the motor 1 may be the one ordered by a speed command circuit 6. In other words, the location.speed control circuit 5 outputs a normal rotation or reverse rotation signal and a PWM signal. Then, the normal rotation or reverse rotation signal is inputted to a pattern generation circuit 15. To the pattern generation circuit 15, a counter data is also inputted from a counter circuit 13 and a magnetic pole signal is inputted from a magnetic pole sensor 2. Then, the pattern generation circuit 15 outputs a driving pattern corresponding to the inputted signals. A driving circuit 4 drives according to this driving pattern, keeping the motor 1 driving.

8. 发明专利

JP2001129288A FULLY AUTOMATIC WASHING AND DRYING MACHINE 失效
公开(公告)号：JP2001129288A
公开(公告)日：2001-05-15
申请号：JP2000309431
申请日：2000-10-10
申请人： HITACHI LTD
发明人： TAWARA KAZUO , YASUJIMA TOSHIYUKI , OHARAGI HARUO , OKUYAMA TOSHIAKI , ENDO TSUNEHIRO , FUJIMOTO NOBORU , MIYASHITA KUNIO , HIROSE ETSURO
IPC分类号： D06F33/02 , D06F25/00 , D06F37/40
摘要： PROBLEM TO BE SOLVED: To provide a fully automatic washing machine and a fully automatic washing and drying machine which are excellent in performance. SOLUTION: This fully automatic washing and drying machine does washing, spinning and drying by having an outer frame, an outer tub suspended/supported in the outer frame, a basket rotatably arranged in the outer tub, a rotary body rotatably arranged in the basket and a motor supplied with electric power from a variable frequency control device, and is characterized by switching washing and spinning (otherwise washing, spinning or drying) by a clutch by having the clutch for transmitting or not transmitting torque of the motor to the basket and a speed reduction gear for decelerating rotation of the motor.

9. 发明专利

JPH11103587A SPEED CONTROLLER FOR ELECTRIC MOTOR 失效
公开(公告)号：JPH11103587A
公开(公告)日：1999-04-13
申请号：JP21084298
申请日：1998-07-27
申请人： HITACHI LTD
发明人： YAMASHITA KOJIRO , ENDO TSUNEHIRO , MIYASHITA KUNIO , KASHIWAZAKI SUSUMU , IIZUKA KENICHI
IPC分类号： H02P6/06 , H02P6/08 , H02P27/06 , H02P27/08 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To control a speed of an electric motor in a wide range, by executing a speed control of the motor by using a step-up chopper in a high speed range, and conducting a PWM control by a power converter in a low speed range. SOLUTION: AC voltage in AC power source 1 is converted into a DC voltage via a rectifier 2 and step-up chopper 3. Thus, DC power is supplied to an inverter 4. A synchronous motor 5 is driven by the inverter. A microcomputer 6 inputs various programs necessary to drive the motor 5, and executes processing of an inverter drive signal 18 to a driver 9a for the inverter, current command 19 to a power source current controller 11, output of a voltage signal 20 to an inverter controller 9, and the like. The chopper 3 forms a drive signal to a transistor 3b by the controller 11. Thus, an amplitude of power source current 10 is changed by altering ON time and OFF time of the transistor 3b.

10. 发明专利

JPH1052093A SPEED CONTROLLER FOR MOTOR 失效
公开(公告)号：JPH1052093A
公开(公告)日：1998-02-20
申请号：JP734497
申请日：1997-01-20
申请人： HITACHI LTD
发明人： YAMASHITA KOJIRO , ENDO TSUNEHIRO , MIYASHITA KUNIO , KASHIWAZAKI SUSUMU , IIZUKA KENICHI
IPC分类号： H02M7/48 , H02P6/06 , H02P27/06 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To control the rotating speed of a motor over a wide range, by controlling the intermittent operations of the switching element of a booster chopper circuit in a high-speed region and pulse width modulation so that the deviation of the detected speed of the motor from a commanded speed can become zero in a low-speed region. SOLUTION: In a region where a DC voltage is higher than a power supply voltage 21, the DC voltage is controlled by using a booster chopper circuit and an inverter is set to a high-speed control mode. In the other region, the booster chopper circuit controls the DC voltage to a constant voltage, and the inverter is set to a low-speed control mode in which PWM control is performed. The inverter is switched to the high-speed mode from the low-speed mode when the PWM control duty of the inverter becomes 100% and to the low-speed mode from the high-speed mode when the DC voltage becomes lower than a set voltage. Therefore, the speed of a motor can be controlled over a wide range.

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