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1. 发明专利

JP2001314090A INVERTER DEVICE 失效
公开(公告)号：JP2001314090A
公开(公告)日：2001-11-09
申请号：JP2000132843
申请日：2000-04-27
申请人： HITACHI LTD , HITACHI KEIYO ENG & SYS LTD
发明人： SAKAI KEIJIRO , OKUYAMA TOSHIAKI , NAKATSU KINYA , ISHIDA SEIJI , FUJII HIROSHI , KATO JUNJI , HIRAGA MASAHIRO
IPC分类号： H02M7/48 , H02P27/06 , H02P27/08 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To accurately perform current limiting in the case of the automatic torque boost control and overload of an AC electric motor by an AC phase current obtained from the DC input current of an inverter. SOLUTION: This inverter device is provided with a first sample-and-hold circuit for sampling and holding the DC input current in a gate state for turning on only one phase and turning off the other two phases out of the three phases of the positive side arm switching element or the negative side arm switching element of a three-phase inverter, and a second sample-and-hold circuit for sampling/holding the DC input current in a gate state for turning on the second phase and turning off the other phase, thus varying the output frequency or output voltage of the inverter according to the first and second sample-and-hold circuit output value that changes with 120-degree phase period of the inverter output voltage phase.

2. 发明专利

JP2007189897A Method for controlling ac motor 有权
标题翻译：控制交流电机的方法
公开(公告)号：JP2007189897A
公开(公告)日：2007-07-26
申请号：JP2007106665
申请日：2007-04-16
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SAKAI KEIJIRO , ONDA KENICHI , TOMITA HIROYUKI
IPC分类号： H02P27/06 , H02P21/00 , H02P27/04
摘要： PROBLEM TO BE SOLVED: To provide an AC motor control method, which accurately measures the primary resistance in a motor that affects the vector control by a large amount and obtains precision vector control characteristic, even when the motor temperature changes. SOLUTION: This method measures the secondary time constant and the inertial moment of the motor, prior to operation, and calculates the DC excitation time Tset, based on them. To quickly decelerate and stop the AC motor, this method makes a constant DC current flow via an inverter for a Tset time, beginning when a deceleration command reaches the proximity of stoppage frequency. In addition, primary resistance is obtained in the motor, from the ratio of the motor voltage that is to be applied to the motor current. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种AC电动机控制方法，其即使当电动机温度变化时，也能够高精度地测量影响矢量控制的电动机中的初级电阻并获得精确矢量控制特性。
解决方案：该方法在运行前测量电机的次级时间常数和惯性力矩，并根据它们计算直流励磁时间Tset。为了快速减速并停止交流电机，该方法使得在减速指令达到停止频率附近时，通过变频器进行Tset时间的恒定直流电流流动。此外，从电动机电压与电动机电流的比例来看，在电动机中获得一次电阻。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2005151726A Linear motor and xy stage 有权
标题翻译：线性电机和XY级
公开(公告)号：JP2005151726A
公开(公告)日：2005-06-09
申请号：JP2003387344
申请日：2003-11-18
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KIM HOUNG JOONG , SAKAI KEIJIRO , SHIBATA HITOSHI
IPC分类号： H02K41/00 , H02K41/02 , H02K41/03
CPC分类号： H02K41/03 , H02K2201/18
摘要： PROBLEM TO BE SOLVED: To provide a linear motor, in which the entire length of the linear motor can be shortened by shortening a distance between armatures at the making of a multiple phase structure.
SOLUTION: The linear motor includes the armature having facing parts facing via the secondary side and a winding which is wound around the secondary side. Further, the linear motor has the facing parts, in which the armature is opposed via the secondary side and the winding in the armature and wound at the same position in a direction perpendicular to the secondary side.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种线性电动机，其中通过缩短在制造多相结构时电枢之间的距离可以缩短线性电动机的整个长度。解决方案：线性电动机包括具有经由次级侧面对的面对部分的电枢和缠绕在次级侧的绕组。此外，线性电动机具有面对部分，其中电枢经由次级侧相对，并且电枢中的绕组相对，并且在垂直于次级侧的方向上缠绕在相同位置。版权所有（C）2005，JPO＆NCIPI

4. 发明专利

JP2004166356A Linear drive device 有权
标题翻译：线性驱动装置
公开(公告)号：JP2004166356A
公开(公告)日：2004-06-10
申请号：JP2002327669
申请日：2002-11-12
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KIM HOUNG JOONG , MAKI KOJI , TADOKORO HISAO , SHIMANE HIDEKI , SHIBATA HITOSHI , SAKAI KEIJIRO
IPC分类号： H02K41/03
CPC分类号： H02K41/03
摘要： PROBLEM TO BE SOLVED: To solve the problem of a conventional linear drive device that the overall length of an armature increases in proportion to the number of phases when a linear motor of polyphase structure is constituted by coupling a plurality of armature units and thereby the installation location is limited.
SOLUTION: The linear drive device comprises a plurality of armature units 3 each consisting of a magnetic material arranged with a conductor coil 4, and an armature arranged with a plurality of armature units 3. The armature unit 3 has a plurality of parts where the pole teeth face each other and the pole teeth at the adjacent facing parts are staggered. A secondary member 6 is interposed between pole teeth constituting the facing parts and the armature unit 3 is arranged with the coil 4 on each opposite side.
COPYRIGHT: (C)2004,JPO
摘要翻译：解决的问题：为了解决现有的线性驱动装置的问题，即当多相结构的线性电动机通过耦合多个电枢单元而构成时，电枢的总长度与相位数成比例地增加，因此安装位置有限。线性驱动装置包括多个电枢单元3，每个电枢单元3由布置有导体线圈4的磁性材料和布置有多个电枢单元3的电枢组成。电枢单元3具有多个部件其中极齿彼此面对并且在相邻的面对部分处的极齿交错。副构件6设置在构成对置部分的极齿之间，电枢单元3布置成在每个相对侧上具有线圈4。版权所有（C）2004，JPO

5. 发明专利

JP2003037999A Inverter system 有权
标题翻译：逆变器系统
公开(公告)号：JP2003037999A
公开(公告)日：2003-02-07
申请号：JP2001223066
申请日：2001-07-24
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SAKAI KEIJIRO , OKUYAMA TOSHIAKI , NAKATSU KINYA , TOMITA HIROYUKI , KATO JUNJI , FURUKAWA TEIICHI
IPC分类号： H02P23/00 , H02P1/16 , H02P21/00 , H02P27/04 , H02P7/36
CPC分类号： H02P1/16 , H02P21/34
摘要： PROBLEM TO BE SOLVED: To prevent over excitation if torque boost voltage is largely set to acquire high starting torque in a multipurpose inverter and the like. SOLUTION: An induced voltage indication Em* is acquired from an inverter's primary frequency indication ω1*, then a torque boost voltage indication ΔVz* corresponding to the ω1* from a torque boost voltage indicator 8 and standard phase indication θd* from an integrator 9 are output. Exciting current Id (equivalent to no-load current) of a motor is detected by a uvw/dq exchanger 11. Deviation of exciting current limitation level indication Idmax* and exciting current detection value Id is input in a limiter process part 13, and torque boost voltage compensation amount ΔVc to change the ΔVz* is output so that the Id reaches at the Idmax* or less. The inverted ΔVz* is regarded as the lowest limiter value of the limiter process part. A last torque boost voltage indication after compensation ΔVt* is determined by adding these ΔVc and ΔVz*, and a q axis voltage indication Vq* of inverter output voltage is determined by adding these ΔVt* and Em*.
摘要翻译：要解决的问题：为了在多功能逆变器等中获得高起动转矩时大力设定转矩提升电压，防止过励磁。解决方案：从变频器的主要频率指示ω1*获取感应电压指示Em *，然后从转矩提升电压指示器8对应于ω1*的转矩提升电压指示ΔVz*和来自积分器9的标准相位指示θd* 输出。电动机的励磁电流Id（相当于空载电流）由uvw / dq交换机11检测。励磁电流限制电平指示Idmax *和励磁电流检测值Id的偏差被输入限幅器处理部13，并且转矩输出升压电压补偿量ΔVc以改变ΔVz*，使得Id达到Idmax *或更小。反转ΔVz*被认为是限幅器处理部分的最低限幅值。通过加上这些ΔVc和ΔVz*来确定补偿后的最后一个转矩提升电压指示ΔVt*，并通过将这些ΔVt*和Em *相加来确定逆变器输出电压的q轴电压指示Vq *。

6. 发明专利

JPH08251927A ERRONEOUS WIRING DETECTOR 失效
公开(公告)号：JPH08251927A
公开(公告)日：1996-09-27
申请号：JP5225495
申请日：1995-03-13
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： YAMAMOTO TOSHIHIKO , SAKAI KEIJIRO , TAMADA KATSUHIRO , KAZUSA HIROYUKI
IPC分类号： H02H3/24 , H02M7/48 , H02M7/493
摘要： PURPOSE: To block throw-in of AC main power supply by providing means for opening a switch when the DC output voltage from a DC power supply does not exceed a predetermined level thereby detecting short circuit at DC section before the AC main power supply is thrown in. CONSTITUTION: When erroneous wiring is not present, a charging current flows from the DC power supply 17 of an erroneous wiring detector 19 through a route L1 to smoothing capacitors 6, 8 to raise the charging voltage VC. The forward drop voltage VP of a diode DP, the voltage V2 across a resistor 3, and the base-emitter voltage VB of a transistor Q7 are then subtracted from the charging voltage VC. When the difference exceeds the break voltage VZ of a constant voltage diode Zd, a base current is fed to the transistor Q7 and the emitter-collector thereof is conducted to feed the coil of an electromagnetic relay 18 with a current through a current limit resistor R1. Consequently, the contacts of the electromagnetic relay 18 are closed to produce an interlock signal for an electromagnetic switch 2.

7. 发明专利

JPH0834695B2 失效
公开(公告)号：JPH0834695B2
公开(公告)日：1996-03-29
申请号：JP23767190
申请日：1990-09-07
申请人： HITACHI LTD
发明人： IKIMI TAKASHI , MOTOBE MITSUSACHI , KUBOTA YUZURU , TOBARI KAZUAKI , SAKAI KEIJIRO , KAMYAMA KENZO , TAKAHASHI JUNICHI
IPC分类号： H02M7/21 , H02M7/12 , H02M7/48 , H02P27/08

8. 发明专利

JPH0634585B2 失效
公开(公告)号：JPH0634585B2
公开(公告)日：1994-05-02
申请号：JP23132084
申请日：1984-11-05
申请人： HITACHI LTD
发明人： MUTO NOBUYOSHI , SAKAI KEIJIRO , HATSUTORI MOTONOBU , NAGATO JUICHIRO
IPC分类号： H02M7/48 , H02P27/06 , H02P7/63

9. 发明专利

JPH0528078B2 失效
公开(公告)号：JPH0528078B2
公开(公告)日：1993-04-23
申请号：JP19160884
申请日：1984-09-14
申请人： HITACHI LTD
发明人： MUTO NOBUYOSHI , SAKAI KEIJIRO , UEDA AKITERU , ISHIBASHI AKIRA , OKAJIMA IKUO
IPC分类号： H02P21/05 , H02P21/22 , H02P23/04 , H02P23/07 , H02P25/02 , H02P27/06 , H02P27/08

10. 发明专利

JPH02146963A CONTROLLER FOR VOLTAGE TYPE PWM INVERTER 失效
公开(公告)号：JPH02146963A
公开(公告)日：1990-06-06
申请号：JP29821688
申请日：1988-11-28
申请人： HITACHI LTD
发明人： SAKAI KEIJIRO , MUTO NOBUYOSHI , MOTOBE MITSUSACHI , FUJII HIROSHI
IPC分类号： H02M7/48
摘要： PURPOSE:To reduce distortion stably by installing the correction-quantity variable setting circuit of pulse width of a PWM signal and a dead-time period variable setting circuit. CONSTITUTION:A voltage type PWM inverter 3 is composed of the IGBTs 4a, 4b, etc., of a high-speed switching element, converts the DC output of a DC power 1 into AC, and variable-speed controls an induction motor 2. The controller has a modulated-wave generating circuit 6, a triangular-wave generating circuit 7, a comparator 8, a pulse-width correction circuit 9, a dead time circuit 10, an error-voltage polarity detector 11 and an arm voltage detector 12. The functions of a correction-quantity variable setting circuit and a dead- time variable setting circuit for setting the quantity of correction and the value of the dead time at arbitrary values are given to one-chip micro-computer 13. Accordingly, the quantity of correction is changed in response to load currents, thus allowing accurate correction at all times.

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