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1. 发明专利

JPH0830321A CONTROL PANEL WITH HELP FUNCTION 失效
公开(公告)号：JPH0830321A
公开(公告)日：1996-02-02
申请号：JP16825194
申请日：1994-07-20
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： IBORI SATOSHI , TOKASHIKI MUTSUO , BABA SHIGEYUKI , TAKADA NAOKI , ITO KAZUHIRO , SHIMOZU TADAO , HIROTA MASAYUKI
IPC分类号： G05B23/02
摘要： PURPOSE:To provide a control panel for equipment such as an inverter, with which explanation information required for operations can be sufficiently provided, to be sufficiently miniaturized while improving convenience. CONSTITUTION:When operation conditions or the like are displayed on a display screen 3 by an operation button 4 of a control panel 1, corresponding to this display, an indication expressing any prescribed page in a manual is simultaneously displayed at a line F of this display screen 3. When a selection setting operation is performed by the operating button 4 of the control panel 1, corresponding to the operation conditions set by this operation, the number of a page describing information such as the meaning of that setting or the method effective for the operation in the manual is automatically displayed on the line F of the display screen 3 so that the manual can be easily and simply referred to and effectively utilized as well. As a result, even a biginner can always perform the exact operation in a short time, and the convenience of the inverter can be sufficiently improved.

2. 发明专利

JPS62147991A CONTROLLER FOR AC MOTOR 失效
公开(公告)号：JPS62147991A
公开(公告)日：1987-07-01
申请号：JP28554685
申请日：1985-12-20
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： SHIMOZU TADAO , IBORI SATOSHI , TAKANO TSUTOMU
IPC分类号： H02P21/05 , H02P21/22 , H02P23/00 , H02P23/04 , H02P23/07 , H02P25/04 , H02P27/06
摘要： PURPOSE:To reduce the current capacity of a chopper and the capacity of a filter condenser respectively and miniaturize a device lightening the weight, by working the differential value of DC waveform positively to the output command value of the chopper. CONSTITUTION:By a differential value output means 15, the output of a DC current transformer 17 is received, and the differential value output of this output is generated. Voltage command COV is added to the output of the differential value output means 15 by an arithmetic operation means 16. By this organization, when direct current is increased, then the output of the arithmetic operation means 16 is worked so that the output voltage of a chopper 4 may be reduced, and when current is reduced, then the output is worked so that the output voltage of the chopper 4 may be increased.

3. 发明专利

JPS61288787A OPERATING METHOD FOR INDUCTION MOTOR 失效
公开(公告)号：JPS61288787A
公开(公告)日：1986-12-18
申请号：JP12982785
申请日：1985-06-17
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： SHIMOZU TADAO , NANTO KENJI , FUJI KUNIHIKO , ISOGAI MASAMI
IPC分类号： H02P3/18
摘要： PURPOSE:To brake an induction motor while regenerating a braking energy to a power source without increasing the capacity of a power converter by switching the motor energized by the output of frequency converting means through a transformer to a commercial power source and regeneratively braking the motor. CONSTITUTION:An inverter 2 and an AC transformer 3 are energized by an AC power source 1. The inverter 2 or the transformer 3 are switched by switches 5, 6 and connected with an induction motor 4. The inverter 2 supplies an output of the frequency larger than the power source 1 through the switch 5 to the motor 4, and the witch 6 is closed when the motor 4 is braked to regeneratively brake it through the transformer 3.

4. 发明专利

JPS61139273A Controller for current type inverter 失效
标题翻译：电流型逆变器控制器
公开(公告)号：JPS61139273A
公开(公告)日：1986-06-26
申请号：JP25991484
申请日：1984-12-11
申请人： Hitachi Keiyo Eng Co Ltd , Hitachi Ltd
发明人： ISOGAI MASAMI , IBORI SATOSHI , SHIMOZU TADAO
IPC分类号： H02M7/48
CPC分类号： H02M7/48
摘要： PURPOSE:To reduce the vibration and noise of an inverter capacity reduction motor by intermittently turning ON a self-extinguishing element near the time when the output current of an inverter becomes the maximum value. CONSTITUTION:A pulse train superposed on a gate signal turns ON a self- extinguishing element Su near the maximum current flowed to a self- extinguishing element Sx connected in series with a self-extinguishing element Su controlled by a gate signal. Thus, the saturated waveform is eliminated near the maximum value of positive and negative input currents to an AC machine 5, and approached to a sinusoidal wave to reduce the vibration and noise of an inverter capacity reduction motor.
摘要翻译：目的：通过在变频器的输出电流达到最大值的时候间歇地接通自熄元件，减少变频器容量降低电机的振动和噪音。构成：叠加在门信号上的脉冲串将导通一个自熄元件Su，该最大电流流过自熄元件Sx，该自熄元件Sx与由栅极信号控制的自熄元件Su串联。因此，在AC电机5的正，负输入电流的最大值附近消除饱和波形，并且接近正弦波，以减少变频器容量降低电动机的振动和噪声。

5. 发明专利

JPH0775382A METHOD AND DEVICE FOR CONTROLLING OPERATION OF INDUCTION ELECTRIC MOTOR 失效
公开(公告)号：JPH0775382A
公开(公告)日：1995-03-17
申请号：JP9868994
申请日：1994-05-12
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： IBORI SATOSHI , SHIMOZU TADAO , YABU MASATOMO
IPC分类号： H02P1/30 , H02P27/06 , H02P7/63
摘要： PURPOSE:To rapidly and smoothly restart an induction electric motor when power supply to the induction electric motor is suspended. CONSTITUTION:If it is judged that there is no residual voltage when restarting an induction electric motor after a power supply momentary stop occurs during the operation of the induction electric motor and when power recovers after the power supply momentary stop, an AC power is applied to the induction electric machine, the AC power to the induction electric motor is cut off after the application, the frequency of the residual voltage generated at the primary side terminal of the induction electric motor is detected after the cut off, and then the induction electric motor is restarted according to the detected frequency, thus rapidly and smoothly restarting the induction electric motor after the momentary stop.

6. 发明专利

JPH0775381A OPERATION CONTROL METHOD OF INDUCTION ELECTRIC MOTOR 失效
公开(公告)号：JPH0775381A
公开(公告)日：1995-03-17
申请号：JP9868894
申请日：1994-05-12
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： IBORI SATOSHI , SHIMOZU TADAO , YABU MASATOMO
IPC分类号： H02P1/30 , H02P27/06 , H02P7/63
摘要： PURPOSE:To rapidly and smoothly restart an induction electric motor when the power supply to the induction motor is suspended. CONSTITUTION:When the power supply to an induction electric motor is temporarily suspended and then is restarted, a frequency which is detected from the residual voltage at the primary side terminal of the induction electric motor on restarting is retained and then the frequency is changed at an operating frequency, thus smoothly and rapidly restarting the induction electric motor after momentary stop.

7. 发明专利

JPH04286239A COMMUNICATION EQUIPMENT 失效
公开(公告)号：JPH04286239A
公开(公告)日：1992-10-12
申请号：JP7373391
申请日：1991-03-14
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： TSUJI NORITOSHI , SHIMOZU TADAO , FUJII HIROSHI , SAITO YASUO , YAMAUCHI YUTAKA
IPC分类号： G06F11/20 , G06F13/00 , H04L12/40
摘要： PURPOSE:To provide communication equipment which is able to change and select a master station optionally and very easily without necessitating the change of the connection of a signal line, and has the large degree of freedom for system configuration. CONSTITUTION:Equipment constituting a slave station in a system is provided with a switching means 25,35,45 necessary for giving a function a the master station. Then, since any slave station becomes capable of being used as the master station by only operating the switching means 25,35,45, the change of the system configuration or the case of a fault can be easily dealt with, and down time can be drastically reduced.

8. 发明专利

JPS61244276A CONTROLLER OF POWER CONVERTER 失效
公开(公告)号：JPS61244276A
公开(公告)日：1986-10-30
申请号：JP8544485
申请日：1985-04-23
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： IBORI SATOSHI , SHIMOZU TADAO , ISOGAI MASAMI
IPC分类号： H02M7/48 , H02M7/515
摘要： PURPOSE:To prevent an overvoltage by providing inhibiting means of arc extinguishing control and attenuating a DC current without turning OFF a GTO even at power source interruption time such as a momentary power interruption time, thereby suppressing a spike voltage. CONSTITUTION:A gate signal controller has a buffer 6, a photocoupler 7, resistors Z1-Z3, capacitors C1, C2, forward/reverse bias discriminator 8, a forward bias driver 9, a reverse bias driver 10 and a full-wave rectifier 11. Thus, a PWM signal 15 from a PWM controller is input through a buffer 6 to a photocoupler 7, the discriminator 8 is operated by its output signal to decide to select either one of the drivers 9, 10 so that a gate current Ig becomes proportional to a PWM pulse signal. In this case, a power source defect detector 12, a base driver 13 and a transistor 14 are provided, a DC current is attenuated without turning OFF the GTO1 at power source defect time such as momentary power interruption time to prevent an overvoltage from being induced.

9. 发明专利

JPH08336296A OPERATION CONTROL METHOD FOR INDUCTION MOTOR 失效
公开(公告)号：JPH08336296A
公开(公告)日：1996-12-17
申请号：JP16184696
申请日：1996-06-21
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： IBORI SATOSHI , SHIMOZU TADAO , YABU MASATOMO
IPC分类号： H02H7/00 , H02P1/30 , H02P27/06 , H02P7/63
摘要： PURPOSE: To restart an induction motor quickly and smoothly by a method wherein power is fed temporarily after power interruption and then power supply from a power converter to the induction motor is interrupted again before the induction motor is restarted depending on the frequency of residual voltage in the induction motor detected after power interruption. CONSTITUTION: Upon occurrence of instantaneous power interruption, a control circuit 14 interrupts the output from a drive circuit 15 to an inverter 2. r.p.m. of an induction motor 3 begins to decrease with a slight time lag behind occurrence of instantaneous power interruption and the residual voltage also begins to decrease. When the residual voltage is zero upon recovery from instantaneous power interruption, a re-excitation command circuit 10 and a command circuit 11 are operated to release interruption of output from the induction motor 3 which is thereby operated. Upon elapse of a predetermined time, the output is interrupted again. Upon further elapse of a predetermined time, the residual voltage is detected and when it is not zero, soft start is performed through a residual voltage detection circuit 6, a frequency detection circuit 7, a frequency setting circuit 8, and an output voltage soft start circuit 9 by squeezing the output voltage based on the frequency setting.

10. 发明专利

JPH06335288A METHOD AND APPARATUS FOR CONTROLLING ALTERNATING CURRENT MOTOR 失效
公开(公告)号：JPH06335288A
公开(公告)日：1994-12-02
申请号：JP504494
申请日：1994-01-21
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： IBORI SATOSHI , SHIMOZU TADAO , AKIYAMA YUTAKA , OKAYASU YOSHIYUKI , YABU MASATOMO
IPC分类号： H02P1/30 , H02M7/72 , H02P27/06 , H02P7/63
摘要： PURPOSE:To provide a method and an apparatus for controlling alternating current motors wherein a speed command is quickly and smoothly given after the end of a momentary power failure until the speed becomes a speed set by a target speed command means. CONSTITUTION:If input to a voltage type inverter is interrupted and then power supply is restored during the regenerative operation of an alternating current motor 4, the rate of change in the output of an output gradually changing means is made higher than that when starting the motor from a standstill. The increased rate of the output change is continued until a target speed is approached. This apparatus consists of a power rectifier 1, a smoothing capacitor 3, a power inverter 2, a target speed command means and the output gradually changing means. The apparatus is also provided with a momentary power failure detecting means 7 that detects the occurrence of a momentary power failure in the input to the power rectifier. The output gradually changing means 8 is constituted as follows: If the momentary power failure detecting means generates a signal representing that recovery from a power failure has been completed during the regenerative operation of the alternating current motor, the ratio of change in the output of the output gradually changing means 8 is made higher than that when starting the alternating current motor at a standstill, and the ratio of change is kept increased until the speed increases nearly to a target speed.

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