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71. 发明专利

JPS52122817A ROTARY MACHINE 失效
公开(公告)号：JPS52122817A
公开(公告)日：1977-10-15
申请号：JP3920676
申请日：1976-04-09
申请人： HITACHI LTD
发明人： SUGIURA YASUYUKI , MIYASHITA KUNIO , OKUDA HIROSHI , YASUDA IZURU , TATSUMI TAMOTSU
IPC分类号： H02K19/08
摘要： PURPOSE:To make the magnetic flux density on a winding groove and control the amplitude of the pulsation magnetic flux within the gap between a rotor a and a stator on a small scale by locating a magnetic body outside the aperture of the winding groove.

72. 发明专利

JPS51121119A MEANS FOR DRIVING HYSTERESIS MOTOR 失效
公开(公告)号：JPS51121119A
公开(公告)日：1976-10-22
申请号：JP4521675
申请日：1975-04-16
申请人： HITACHI LTD
发明人： MIYASHITA KUNIO , SUGIURA YASUYUKI , OKUDA HIROSHI , MATSUDA YASUO
IPC分类号： H02P27/06 , H02P25/02
摘要： PURPOSE:To provide a hysteresis motor drive means of a simple construction, which can permit improvement of the efficiency of the hysteresis motor.

73. 发明专利

JPS5181924A 失效
公开(公告)号：JPS5181924A
公开(公告)日：1976-07-17
申请号：JP629575
申请日：1975-01-16
申请人： HITACHI LTD
发明人： MYASHITA KUNIO , SUGIURA YASUYUKI , OKUDA HIROSHI , MATSUDA YASUO
IPC分类号： H02P27/06 , H02P23/16 , H02P23/26 , H02P25/02

74. 发明专利

JPS5145208A 失效
公开(公告)号：JPS5145208A
公开(公告)日：1976-04-17
申请号：JP11816374
申请日：1974-10-16
申请人： HITACHI LTD
发明人： SUGIURA YASUYUKI , MYASHITA KUNIO , OKUDA HIROSHI , YASUDA IZURU
IPC分类号： H02K7/02 , H02K19/08

75. 发明专利

JPS5110314A 失效
公开(公告)号：JPS5110314A
公开(公告)日：1976-01-27
申请号：JP8106274
申请日：1974-07-17
申请人： HITACHI LTD
发明人： MYASHITA KUNIO , SUGIURA YASUYUKI
IPC分类号： H02K19/08

76. 发明专利

JPS515512A 失效
公开(公告)号：JPS515512A
公开(公告)日：1976-01-17
申请号：JP7633874
申请日：1974-07-05
申请人： HITACHI LTD
发明人： MYASHITA KUNIO , SUGIURA YASUYUKI , OKUDA HIROSHI
IPC分类号： B01D59/20 , B04B5/08 , B04B9/04 , H02K19/08

77. 发明专利

JP2001340000A CONSTANT POWER OPERATION CONTROL METHOD OF INDUCTION MOTOR 失效
公开(公告)号：JP2001340000A
公开(公告)日：2001-12-07
申请号：JP2000160501
申请日：2000-05-30
申请人： HITACHI LTD
发明人： SUGIURA YASUYUKI , YAMASHITA KOJIRO , SHIMADA KEIZO
IPC分类号： H02P27/06 , H02P21/00 , H02P21/22 , H02P21/36 , H02P23/07 , H02P27/04 , H02P27/08 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To contrive electric power saving in high speed range and enable small size and lightweight of a device by performing V/F constant control in a low speed range and constant voltage control in the high speed range. SOLUTION: An angular speed arithmetic part 7 determines the output angular speed 18 of an electric motor in accordance with a superordinate angular speed instruction 16 when the speed of an induction motor 5 is controlled. A rated power instruction part 8 sets the rated angular speed instruction value 19 and the rated excitation current instruction value 20 of a rated power point in accordance with the item of the electric motor. An excitation current instruction part 9 selects a constant rated excitation current instruction value when an output angular speed is the rated angular speed instruction value or less to realize V/F control as excitation current, and when the output angular speed is the rated angular speed instruction value or more, the excitation current Idn realizes constant voltage control by performing control so that the multiplied value of the excitation current and the output angular speed is equal to the multiplied value of the rated excitation current instruction value and the rated angular speed instruction value. d-axis voltage Vd and q-axis voltage Vq are obtained from an excitation current instruction Idn and q-axis feedback current Iqf, and a PWM pulse is given to a reverse converter 4.

78. 发明专利

JP2000228888A CONTROL OF INDUCTION MOTOR AND DEVICE THEREOF 失效
公开(公告)号：JP2000228888A
公开(公告)日：2000-08-15
申请号：JP2966299
申请日：1999-02-08
申请人： HITACHI LTD
发明人： SUGIURA YASUYUKI , ABE JUN
IPC分类号： H02P27/06 , H02P5/41
摘要： PROBLEM TO BE SOLVED: To start in a short time, when a motor is starting up and restarting from instantaneous power failure, and prevent the motor from generating overcurrent for a stable operation. SOLUTION: A control part 7 of an induction motor is provided with a command part 9, an acceleration/deceleration control part 10, a current angular velocity control part 14, a current control discriminating circuit 15, a switching device 16, an angular velocity command part 17, an instantaneous stop acceleration/deceleration control 30, an instantaneous stop setting current control 32, an exciting current variable speed circuit 31, and a feedback current selective circuit 33, stores a value of output angular velocity prior to instantaneous stop to an output angular velocity storage circuit when power failure occurs instantaneously. When is restarts from instantaneous stop, verifies that the induction voltage of a motor became equal to a specified value or lower, takes the angular velocity stored in the output angular velocity as an initial value to return to the output angular velocity, and compares the feedback torque current of the larger existing current and the set current for current angular velocity control, thereby enables restarting from instantaneous stop extending across the four quadrants of the motor.

79. 发明专利

JPH11122999A METHOD AND EQUIPMENT FOR CONTROLLING INDUCTION MOTOR 失效
公开(公告)号：JPH11122999A
公开(公告)日：1999-04-30
申请号：JP29958697
申请日：1997-10-16
申请人： HITACHI LTD
发明人： SUGIURA YASUYUKI , YAMASHITA KOJIRO , KATO TETSUYA
IPC分类号： H02P21/00 , H02P21/22 , H02P21/36 , H02P23/07 , H02P23/20 , H02P23/24 , H02P27/04 , H02P27/08
摘要： PROBLEM TO BE SOLVED: To smoothly and efficiently accelerate or decelerate an induction motor without causing overexcitation, even at a low speed or at idle, and to prevent an overcurrent even when the load of the motor is increased. SOLUTION: A controlling section 7 of an induction motor is provided with an acceleration and deceleration controlling section 10, a current angular velocity control section 15, a current controlling and discriminating circuit 16, a switch 17, and an angular velocity commanding section 18. During operation, when an angular velocity ωout output from the angular velocity commanding section is smaller than the rated angular velocity in the acceleration and deceleration controlling section 10, an acceleration angular velocity is added to the output angular velocity, and when it becomes larger than a rated angular velocity, the acceleration angular velocity is subtracted from the output angular velocity for moving the motor into a steady- state operation. When a torque current Iqf becomes larger than a set current 9-5 with an increase in the load of the motor, the connection state is switched by the switch 17, and then in the current angular velocity controlling section, a current angular velocity ωi is generated by multiplying a deviation current, which is a difference between torque current and the set current produced by a proportionality constant set by a constant-setting operation 9-4 and then the current angular velocity is subtracted from the output angular velocity to execute control of the current angular velocity.

80. 发明专利

JPH1169899A CONTROL AND CONTROLLER FOR INDUCTION MOTOR 失效
公开(公告)号：JPH1169899A
公开(公告)日：1999-03-09
申请号：JP22775097
申请日：1997-08-25
申请人： HITACHI LTD
发明人： KATO TETSUYA , SUGIURA YASUYUKI
IPC分类号： H02M7/48 , H02P21/00 , H02P23/07 , H02P23/08 , H02P27/04 , H02P27/08 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To improve the voltage utilization factor of a PWM inverter, by calculating a sinewave waveform with the frequency of three times of a basic frequency, and superimposing the voltage of three-time frequency on the respective phases of three-phase output. SOLUTION: A sinewave generation part 20 obtains three-phase AC voltage Vu to Vw for applying to a motor 5, a voltage utilization improving part 22 produces the voltage waveform of a triple frequency using the magnitude of motor voltage V1 computed at a vector computing part 19 and a phase θ for as a phase difference (δ), and it is added to respective phases of the three-phase AC voltage Vu to Vw outputted from the sinewave generation part 20. A PWM computing circuit 21 compares the three-phase AC voltage Vu to Vw with a carrier wave, such as a chopping wave, produces PWM pulses Tu, Tx, Tv, Ty, Tw, and Tz, applies it to the gate of the semiconductor element of an inverter 4, and drives a motor 5 with a desired frequency and AC voltage added to the motor 5. By superimposing the voltage of the triple frequency on the respective phases of a three-phase output voltage, and calculating the sinewave waveform with three-time frequency of basic frequency, it is possible to improve voltage utilization factor without applying load to control.

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