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91. 发明专利

JPH03190594A AC MOTOR CONTROLLER AND CONTROL METHOD 失效
公开(公告)号：JPH03190594A
公开(公告)日：1991-08-20
申请号：JP11551690
申请日：1990-05-01
申请人： HITACHI LTD
发明人： SAKAI KEIJIRO , KUBOTA YUZURU , IKIMI TAKASHI , MUTO NOBUYOSHI , MOTOBE MITSUSACHI
IPC分类号： H02P25/04 , H02P27/06
摘要： PURPOSE:To suppress output voltage of a converter upon abrupt variation of load by producing a source current value corresponding to the load based on an electrical amount on the output side of an inverter. CONSTITUTION:Output power of an inverter 6 is obtained based on an electrical amount on the output side of the inverter 6, and an input power of a converter 3 is obtained based on the output power of the inverter 6. The input power is then divided by an AC voltage on the input side of the converter 3 thus obtaining a source current value. Consequently, a source current value which is not affected by the ripple component can be produced. When an AC current is fed to the converter 3 according to thus produced current value, required AC power can be fed to the converter 3 even upon abrupt variation of the load of a motor 5. Consequently, fluctuation of the output voltage of the converter 3 can be suppressed.

92. 发明专利

JPH03107373A POWER CONVERTER AND CONTROL METHOD THEREOF 失效
公开(公告)号：JPH03107373A
公开(公告)日：1991-05-07
申请号：JP24206889
申请日：1989-09-20
申请人： HITACHI LTD
发明人： IKIMI TAKASHI , MOTOBE MITSUSACHI , KUBOTA YUZURU , TOBARI KAZUAKI , KAMIYAMA KENZO
IPC分类号： H02M7/48 , H02P27/06
摘要： PURPOSE:To increase the basic wave component of an output voltage, without increasing the higher harmonic components, through a simple control circuit by adding same values to the instantaneous voltage command values of respective phases thereby obtaining new voltage commands. CONSTITUTION:A comparing means 6 compares three-phase instantaneous voltage commands 501-503 one another and outputs an intermediate value 603 from which the maximum value 601 and the minimum value 602 are excluded. One half of the intermediate value 603 is employed as a voltage command correction signal 605 which is then added to the instantaneous voltage commands 501-503 of respective phases thus producing new voltage commands 606-608. When the voltage command of a phase having maximum absolute value is decreased, the peak of the voltage command can be decreased without varying the load voltage. Consequently, the maximum value of the basic wave component can be increased without increasing the higher harmonic component of the output voltage by increasing the voltage command. Furthermore, it can be achieved through a simple control circuit.

93. 发明专利

JPH031905B2 失效
公开(公告)号：JPH031905B2
公开(公告)日：1991-01-11
申请号：JP16193480
申请日：1980-11-19
申请人： HITACHI LTD
发明人： OKUYAMA TOSHIAKI , KUBOTA YUZURU , NAGASE HIROSHI , MOTOBE MITSUSACHI
IPC分类号： H02M1/08 , H02M7/48 , H02M7/515

94. 发明专利

JPH0251363A POWER CONVERTER APPARATUS 失效
公开(公告)号：JPH0251363A
公开(公告)日：1990-02-21
申请号：JP19990488
申请日：1988-08-12
申请人： HITACHI LTD
发明人： UEDA SHIGETA , MOTOBE MITSUSACHI , HONDA KAZUO , MORINAGA DAISAKU
IPC分类号： H02M7/48
摘要： PURPOSE:To reduce a loss by providing each-phase positive and negative electrode arm switching element groups with a common snubber circuit and by providing also each switching element with an individual snubber circuit. CONSTITUTION:In a snubber circuit for one arm of a power converter apparatus, a positive electrode arm is composed of series-connected switching elements 4-5, and an individual snubber 2 and free-wheel diodes 8-9 connected in parallel with respective switching elements 4-5. In like manner, a negative electrode arm is also composed of switching elements 6-7, an individual snubber 3, and free-wheel diodes 10-11. Then, a common snubber 1 consisting of diodes 102-103, capacitors 104-105 and a resistance 101 is connected in parallel with both positive and negative electrode arms. Thus, said common snubber circuit 1 temporarily absorbs an overvoltage energy by turn-OFF of the whole arm and thereafter releases said energy to the AC and DC sides. Further, said individual snubber circuits 2-3 absorb said energy in the same manner.

95. 发明专利

JPH0194066A ELECTRIC POWER STEERING 失效
公开(公告)号：JPH0194066A
公开(公告)日：1989-04-12
申请号：JP24982187
申请日：1987-10-05
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： ABUKAWA TOSHIMI , OKUYAMA TOSHIAKI , TAWARA KAZUO , MARUMOTO KATSUJI , KODERAZAWA TOSHIYUKI , MOTOBE MITSUSACHI , TAKAHASHI TADASHI , ISHIKURA HISATSUGU , YAMAMURA HIROHISA , TATSUZAKI TORU , OMAE TSUTOMU , TAKAMATSU SHUICHI
IPC分类号： B62D5/04
摘要： PURPOSE:To make a power steering operate even at the time of engine stopping by making second electric power so as to fed to the electric power steering by a transfer device of a car engine stops and comes into a state of being undriven. CONSTITUTION:A charging generator 17 composes a first power source, a switching element 31, a commutating diode 32 and a reactor 33 compose a stepdown device, and a battery 19 composes a second power source. At the time of engine stopping, voltage in the batter 19 is impressed on a power control part 12 via a reverse-current blocking diode 24, and thereby a current flows into this power control part 12. Consequently, even in case of engine stopping, torque of a motor 7 identical at the time of engine rotation is securable so that auxiliary force like at the time of engine rotation is giveable to steering wheel.

96. 发明专利

JPH0194065A RESTORING FORCE CONTROLLER FOR POWER STEERING 失效
公开(公告)号：JPH0194065A
公开(公告)日：1989-04-12
申请号：JP24981787
申请日：1987-10-05
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： TAKAHASHI TADASHI , TAWARA KAZUO , ABUKAWA TOSHIMI , MARUMOTO KATSUJI , KODERAZAWA TOSHIYUKI , MOTOBE MITSUSACHI , TAKAMATSU SHUICHI , ISHIKURA HISATSUGU , YAMAMURA HIROHISA , TATSUZAKI TORU , OMAE TSUTOMU
IPC分类号： B62D5/04
摘要： PURPOSE:To aim at improvement in a steering feeling by detecting the torque required for steerage to vary according to a road state and a meteorological condition in a way of separating into acceleration, speed and steering angle components, respectively, and on the basis of these elements, making restoring force so as to be controlled. CONSTITUTION:A reduction gear mechanism 10 is connected to a pinion to be set up in a rack 9 and, in turn, a motor 11 is connected to this reduction gear mechanism 10. Each output terminal of a steering angle sensor 2 and a torque sensor 3 is connected to an input terminal of a controller 12, and an output terminal of the controller 12 is connected to an input terminal of the motor 11. In this controller 12, there are provided with an arithmetic unit 15, a memory 16, an auxiliary steering force controller 17, and a restoring force controller 18. An output signal of the arithmetic unit 15 is inputted into the auxiliary steering force controller 17 and the restoring force controller 18, an interval between the memory 16 and the arithmetic unit 15 is connected by a signal line 25, between the memory 16 and the auxiliary steering force controller by a signal line 19, and between the memory 16 and the restoring force controller 19 by a signal line 20, respectively.

97. 发明专利

JPS6490869A MOTOR POWER STEERING DEVICE 失效
公开(公告)号：JPS6490869A
公开(公告)日：1989-04-07
申请号：JP24380087
申请日：1987-09-30
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： TAWARA KAZUO , ABUKAWA TOSHIMI , MARUMOTO KATSUJI , KODERASAWA TOSHIYUKI , MOTOBE MITSUSACHI , TAKAHASHI TADASHI , TAKAMATSU SHUICHI , ISHIKURA HISATSUGU , YAMAMURA HIROHISA , TATSUZAKI TORU , OMAE TSUTOMU , OKUYAMA TOSHIAKI
IPC分类号： B62D5/04
摘要： PURPOSE:To prevent voltage fluctuation of a second voltage supply upon operation of a motor power steering device by providing two output terminals to a charging generator to be driven through an engine and connecting them respectively through voltage supplies with the motor power steering device and another electronic device. CONSTITUTION:First and second output terminals 21, 22 are provided to a driven generator 17 which is driven by the rotary shaft of an engine 13 through a belt 15 and connected with voltage supplied, i.e. batteries 9, 18. Controller 10 for a motor power steering device is connected to the output terminal of the battery 9, while a general load 12 such as an ignition plug is connected to the output terminal of the battery 18. Upon operation of the steering wheel 1, the controller 10 controls driving of a motor 11 corresponding to steering torque detected through a torque detector 3, and power of the motor 11 is applied as an auxiliary steering force onto a geared rack 5 through a gear box 6.

98. 发明专利

JPS6447611A GROUND CLEARANCE CONTROLLER INTERLOCKED WITH MOTOR-DRIVEN POWER STEERING 失效
公开(公告)号：JPS6447611A
公开(公告)日：1989-02-22
申请号：JP20170487
申请日：1987-08-14
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： MARUMOTO KATSUJI , TAWARA KAZUO , ISHIKURA HISATSUGU , YAMAMURA HIROHISA , TATSUZAKI TORU , ABUKAWA TOSHIMI , KODERAZAWA TOSHIYUKI , MOTOBE MITSUSACHI , TAKAHASHI TADASHI , TAKAMATSU SHUICHI , OMAE TSUTOMU
IPC分类号： B60G17/015 , B60G17/016 , B60G17/06 , B62D5/04 , B62D6/06
摘要： PURPOSE:To improve responsiveness, stability, and steering performance and obtain the simple constitution by controlling the damping force controller of a shock absorbing device by the torque instruction signal of a steering wheel. CONSTITUTION:The steering power of a steering wheel 2 is inputted into a power steering control circuit 71 and a ground clearance control circuit 72 from a torque sensor 5. Similarly, the steering angle is inputted into the control circuit 71 from a steering angle sensor 6, and the car speed is inputted into the control circuit 72 from a car speed sensor 11. When the car speed is over a prescribed value, and the torque value is over a prescribed value, and the steering angle is over a prescribed value, the ground clearance control circuit 72 reads the damping force corresponding to the torque value from a memory, and the car speed correction for the damping force is executed. The electric current control calculation is carried out according to the corrected damping force, and a motor 13 for actuator is driven through an actuator motor driving circuit, and the damping force of a shock absorber 12 is varied. With such constitution, responsiveness can be improved.

99. 发明专利

JPS6430461A CONTROLLER FOR POWER CONVERTER 失效
公开(公告)号：JPS6430461A
公开(公告)日：1989-02-01
申请号：JP18335687
申请日：1987-07-24
申请人： HITACHI LTD
发明人： SASAKI KAZUHIKO , KANAZAWA NAOYUKI , ARAHORI NOBORU , MOTOBE MITSUSACHI
IPC分类号： H02M1/08 , H02M1/06 , H02M7/155
摘要： PURPOSE:To improve linearity between control voltage and DC voltage, by determining a phase angle alpha with an inverse cosine function, against the control voltage from a current controlling circuit. CONSTITUTION:The main circuit of a current type inverter is composed of a power converter 3 with self arc-suppressing elements G1-G6, an overvoltage absorbing capacitor 2, and a DC reactor 4. A control circuit 6 for controlling the DC voltage Ed of the inverter is composed of a synchronous signal generator 8, an analog/digital converter 9, a data retainer 10, a central processing unit 11, an output interface 12, and a storage element 13. Besides, against control voltage from a current controlling circuit, a phase angle alpha is determined with an inverse cosine function. Then, according to the angle and a permeability, the switching pulse of the self arc-suppressing elements G1-G6 is produced, and DC power is controlled. As a result, linearity is kept between the control voltage and the DC voltage.

100. 发明专利

JPS6339470A CONTROL METHOD OF POWER CONVERTER 失效
公开(公告)号：JPS6339470A
公开(公告)日：1988-02-19
申请号：JP17996886
申请日：1986-08-01
申请人： HITACHI LTD
发明人： SASAKI KAZUHIKO , MOTOBE MITSUSACHI , HONDA KAZUO , UEDA SHIGETA , INABA HIROMI , TAKAHASHI HIDEAKI
IPC分类号： H02M7/48 , H02M7/515 , H02M7/521
摘要： PURPOSE:To reduce loss and a high-frequency component by controlling the conduction signal of a self-arc-extinguishing element so as to change over the order of distribution at every period of carriers. CONSTITUTION:An elevator controller is constituted of a power supply 1 applying DC power corresponding to load fluctuation generated in a winding machine 6 by the change of the loadage of a cage 8, a DC reactor 2, a bridge circuit 3 by self-arc-extinguishing elements G1-G6, a capacitor 4 for absorbing overvoltage and an induction motor 5 for winding. A control circuit 15 is organized of an elevator control circuit 11, a frequency command circuit 12, a distribution circuit 13 for a switching pulse train and a gate circuit 14. A first cycle commutated in succession to the first-third self-arc-extinguishing elements G1-G3 and a second cycle successively commutated in the direction opposite to said direction to the third-first self-arc-extinguishing elements G3-G1 are formed by the distribution circuit 13, and power is distributed and controlled. Accordingly, the switching times can be economized.

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