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51. 发明专利

JPH11356089A SPEED ADJUSTER OF THREE-PHASE INDUCTION MOTOR, AND AIR CONDITIONER 失效
公开(公告)号：JPH11356089A
公开(公告)日：1999-12-24
申请号：JP17217598
申请日：1998-06-04
申请人： SANYO ELECTRIC CO
发明人： TSUKUI NAOTO
IPC分类号： H02P23/00 , H02P27/06 , H02P7/36
摘要： PROBLEM TO BE SOLVED: To materialize the speed adjustment of a three-phase induction motor with simple structure and besides at low cost. SOLUTION: In the speed adjuster 27 of a three-phase induction motor which adjusts the rotational speed of a three-phase induction motor (fan motor 26), diodes 30U, 30V, and 30W to apply currents to the side of the three-phase induction motor and transistors 31U, 31V, and 31W capable of apply currents to the side of a three-phase AC power source are connected in parallel with each of three lines of windings 35U, 35V, and 35W for connecting a three-phase AC power source 34 with the three-phase induction motor, and the on-off operation of the transistors is controlled by the control signal sent from a speed adjusting controller 33.

52. 发明专利

JP2991706B1 失效
公开(公告)号：JP2991706B1
公开(公告)日：1999-12-20
申请号：JP25902298
申请日：1998-09-11
申请人： MITSUBISHI MATERIARU KK
发明人： NAKAEGAWA TOMOHIDE
IPC分类号： H02P23/00 , H02P25/04 , H02P27/06 , H02P7/63 , H02P7/36

53. 发明专利

JPH11320640A DRIVE CONTROLLER FOR INJECTION MOLDING MACHINE 失效
公开(公告)号：JPH11320640A
公开(公告)日：1999-11-24
申请号：JP13371298
申请日：1998-05-15
申请人： HITACHI LTD
发明人： MURAMATSU MASAHARU , KOBAYASHI TAKAO , SUGIURA MASAKI
IPC分类号： B29C45/66 , B29C45/76 , H02P23/00 , H02P7/36
摘要： PROBLEM TO BE SOLVED: To achieve mold clamping at sufficiently high torque with a low capacitance by providing one-phase coil of a permanent-magnet type motor separated into a plurality of coils, and by detecting the positions of the mold clamping and mold releasing so as to be switched to a parallel-connection and a series-connection. SOLUTION: An injection molding machine connects two coils U1 , U2 in a U-phase of a motor coil 1 at the connecting terminals U11 , U12 , U21 , U22 in series or in parallel. The switching from the parallel-Y connection to the series-Y connection of the motor coil 1 is exerted by detecting the positions directly before the mold clamping in the mold clamping process, and by turning the (a) contact point 2 of the switch ON and turning the (b) contact point 3 OFF, so as to be switched from the parallel- to the series-connections. On the other hand, the switching from the series-Y connection to the parallel-Y connection is exerted by detecting the retreated position from the switching position of the mold clamping process in the mold releasing process, and by turning the (b) contact point 3 of the motor coil ON and turning the (a) contact point 2 OFF, so as to be switched from the series- to para-connections. This permits each region of a high-speed low-torque and a low-speed high-torque to be used appropriately.

54. 发明专利

JPH11308894A PROCESS FOR POWER FAILURE OF MOTOR 失效
公开(公告)号：JPH11308894A
公开(公告)日：1999-11-05
申请号：JP12421498
申请日：1998-04-18
申请人： YASKAWA ELECTRIC CORP
发明人： MORIMOTO SHINYA , OGURO RYUICHI , FUJII SHUICHI
IPC分类号： H02P3/18 , H02P21/36 , H02P23/00 , H02P23/20 , H02P25/10 , H02P27/06 , H02P7/63 , H02P7/36
摘要： PROBLEM TO BE SOLVED: To extend in the maximum extent the time required until the control is disabled, by reducing the rotating speed of motor until a DC voltage becomes lower than the lower limit voltage in the preset reduction rate when the detected DC voltage becomes lower than the power failure detection level voltage, and until voltage control returns to the ordinary control when the DC voltage exceeds the lower limit value voltage. SOLUTION: An AC voltage supplied from an AC power supply 1 is rectified to a DC voltage, a PN voltage thereof is smoothed via a DC capacitor 3 and is then applied to an inverter 6. This voltage is then detected by a PN voltage detecting means 4 and is then applied to a controller 5. Here, the lower limit allowable voltage of a DC voltage and the power failure detecting level voltage are set. When a detected value of DC voltage from the PN voltage detecting means 4 becomes lower than the power failure detecting level voltage during the motor operation, the motor is reduced in rotating speed until it exceeds the lower limit allowable voltage in the preset reduction rate. When the DC voltage exceeds toe lower limit allowable voltage, voltage control is returned to the ordinary control. As a result, the time required until the control is disabled during the power failure can be extended during the operation of motor.

55. 发明专利

JPH11299287A SPEED CONTROLLER FOR SINGLE-PHASE INDUCTION MOTOR 失效
公开(公告)号：JPH11299287A
公开(公告)日：1999-10-29
申请号：JP14499598
申请日：1998-04-16
申请人： ITO YOSHINORI
发明人： ITO YOSHINORI
IPC分类号： H02P23/00 , H02P25/04 , H02P7/36
摘要： PROBLEM TO BE SOLVED: To provide a speed controller which is capable of quickly responding to the switching of polarity of a load applied to a single-phase induction motor and has small variations in rotation at the time of low speed rotation and is simple in structure. SOLUTION: One end of a primary winding 2 and of an auxiliary winding 3 of a single-phase induction motor are connected to both ends of a capacitor 4 and then are connected to variable resistors 5, 6 respectively and finally connected to a power supply 9 through switches 7, 8. The other end of the primary winding 2 and of the auxiliary winding 3 on the opposite side from the capacitor 4-connected ends are connected to the power supply 9. Under this connecting condition, the potential across the capacitor 4 is changed by closing both of the switches 7, 8, and thereby changing resistance values of the variable resistors 5, 6 to change the voltage and the phase to be supplied to primary winding 2 and the auxiliary winding 3 of the single-phase induction motor. With this method, the speed and the rotating direction of the single phase induction motor can be determined according to the balance with a load.

56. 发明专利

JP2943427B2 失效
公开(公告)号：JP2943427B2
公开(公告)日：1999-08-30
申请号：JP20532391
申请日：1991-08-16
申请人： FUJI DENKI KK
发明人： SATO KATSURA , TANAKA JUNZO
IPC分类号： H02P23/00 , H02P23/24 , H02P25/10 , H02P7/36

57. 发明专利

JPH11197075A VACUUM CLEANER 失效
公开(公告)号：JPH11197075A
公开(公告)日：1999-07-27
申请号：JP564598
申请日：1998-01-14
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： FUJIWARA TOSHIAKI
IPC分类号： A47L9/28 , H02P21/22 , H02P23/00 , H02P25/04 , H02P25/10 , H02P7/36 , H02P7/638
摘要： PROBLEM TO BE SOLVED: To provide a cleaner with a high suction force within a range of electric current capacity of a braker in an ordinary home by raising the suction force by a simple constitution even when the suction force tends to decrease. SOLUTION: A relay coil 7a is connected to an output of an electric current detecting part 6 and when it is connected in series to a suction force setting part 1 and the suction force is high, a relay part connected to NC contact points in parallel is provided at a phase cut setting part 5 for reducing amt. of passing electric current to a fan motor 3 and when the suction force is lowered, output of the electric current detecting part 6 is decreased and electric power supply to the relay coil 7a is decreased and a relay contact point 7b makes a short circuit with a phase cut setting part 5 and increases the amt. of electric current passing the through fan motor 3 to increase the suction force.

58. 发明专利

JPH11150968A PHASE SPLITTING CAPACITOR PERMANENT MAGNET SYNCHRONOUS MOTOR 失效
公开(公告)号：JPH11150968A
公开(公告)日：1999-06-02
申请号：JP33509897
申请日：1997-11-18
申请人： SHIBAURA MECHATRONICS CORP
发明人： NISHIYAMA HIROAKI , NAKATSUKA HARUO
IPC分类号： H02P1/50 , H02K21/12 , H02P21/05 , H02P21/34 , H02P23/00 , H02P23/04 , H02P23/20 , H02P25/04 , H02P25/10 , H02P25/18 , H02P7/36
摘要： PROBLEM TO BE SOLVED: To obtain a phase splitting capacitor permanent magnet synchronous motor which prevents a rotor from being pulled into a speed of synchronous rotation when it is brought close to the speed of synchronous rotation and which prevents a shock when it is jumped instantaneously into the speed of synchronous rotation by a method wherein a plurality of winding groups which are wound on a stator so as to constitute a main winding are connected in parallel. SOLUTION: A main winding 1 is formed in such a way that a first winding group 2 and a second winding group 3 which are composed of one winding or of a plurality of windings are connected in parallel. Electric power is supplied to a stator in which the main winding 1, an auxiliary winding 4 and a capacitor 5 are connected to a single-phase power supply 6, and a rotor is turned. A detection means detects that the speed of rotation of the rotor is pulled into a speed of synchronous rotation. Then, the respective windings 2, 3 for main winding 1 are changed over to their series connection from their parallel connection by a main winding changeover mechanism. Thereby, the amount of a current flowing inside main winding 1 is reduced, and the efficiency of a motor is enhanced.

59. 发明专利

JP2890091B2 失效
公开(公告)号：JP2890091B2
公开(公告)日：1999-05-10
申请号：JP34536993
申请日：1993-12-21
申请人： SANRYUSHA KK
发明人： OZAKI SHIGEHITO
IPC分类号： H02H7/085 , H02P3/06 , H02P3/18 , H02P21/36 , H02P23/00 , H02P23/24 , H02P25/022 , H02P25/04 , H02P25/10 , H02P7/36

60. 发明专利

JPH1118482A CURRENT COMMAND GENERATION CIRCUIT 失效
公开(公告)号：JPH1118482A
公开(公告)日：1999-01-22
申请号：JP16732197
申请日：1997-06-24
申请人： MITSUBISHI HEAVY IND LTD
发明人： HOSHINO AKIHIRO , ISOBE SHINICHI
IPC分类号： H02P23/00 , H02P7/36
摘要： PROBLEM TO BE SOLVED: To deal with a motor rotating at high speed by delivering a current command to a motor, depending on the current waveform from a current waveform derive means and a torque command indicative of a torque being applied to the motor. SOLUTION: A current command generating circuit is constituted a position detector 101, a current waveform derive section 102 and a current command signal derive section 103. The position detector 101 delivers a sensor signal of the same frequency as the induced voltage of motor (induced voltage waveform) to the current waveform derive section 102. The current waveform deriving section 102 generates a stepwise waveform which is analogous to the induced voltage waveform of motor based on a sensor signal outputted from the position detector 101 and then filters the stepwise waveform so as to derive a current waveform. The current command signal deriving section 103 receives a current waveform from the current waveform deriving section 102 and a torque command which is indicative of a torque being applied with respect to the motor and produces a current command signal for the motor by multiplying them.

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