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1. 发明授权

US06545885B2 Isolated operation prevention device for distributed power supply and interharmonic detection method 失效
公开(公告)号：US06545885B2
公开(公告)日：2003-04-08
申请号：US09803945
申请日：2001-03-13
申请人： Shoji Nishimura , Yoshifumi Minowa , Masakuni Asano , Noriaki Tokuda , Tokuo Emura , Yoshihiro Hada
发明人： Shoji Nishimura , Yoshifumi Minowa , Masakuni Asano , Noriaki Tokuda , Tokuo Emura , Yoshihiro Hada
IPC分类号： H02J102
CPC分类号： H02J3/1842 , H02J3/01 , H02J3/24 , Y02E40/22 , Y02E40/40
摘要： A power fluctuation monitoring unit which monitors and detects the power fluctuation at a receiving point 9 by means of the measurement results of the voltage at injection point 14 of an intermediate-order harmonic current and the current at incoming line 10, a power compensation unit which forms the compensation power injection signal for canceling out the power fluctuation based on the detection results of the power fluctuation, and an inverter device 18 which is driven and controlled by the signal resulting from the addition of the intermediate-order harmonic current injection signal and the compensation power injection signal and injects the intermediate-order harmonic current and the compensation power into the injection point, are equipped.

2. 发明授权

US6114859A Harmonic characteristic measuring method and harmonic characteristic measuring apparatus 失效
标题翻译：谐波特征测量方法和谐波特征测量仪器
公开(公告)号：US6114859A
公开(公告)日：2000-09-05
申请号：US114133
申请日：1998-07-13
申请人： Isao Koda , Masakazu Tsukamoto , Yasuhiro Fuwa , Shoji Nishimura , Yoshifumi Minowa , Yasuyuki Natsuda
发明人： Isao Koda , Masakazu Tsukamoto , Yasuhiro Fuwa , Shoji Nishimura , Yoshifumi Minowa , Yasuyuki Natsuda
IPC分类号： G01R19/25 , G01R23/20 , G01R27/28 , G01R23/16 , G01R25/00 , H02H3/26
CPC分类号： G01R19/2506 , G01R23/20
摘要： Single-phase currents at two frequencies f.alpha. and f.beta. (f.alpha.
摘要翻译：在三相电压的两相之间注入系统基波频率fs的非整数倍的两个频率fα和fβ（fα

3. 发明申请

US20060245223A1 Inverter apparatus 失效
标题翻译：变频器
公开(公告)号：US20060245223A1
公开(公告)日：2006-11-02
申请号：US10565389
申请日：2004-07-23
申请人： Yoshitaka Sugawara , Katsunori Asano , Mitsuru Matsukawa , Yoshifumi Minowa , Toshihiko Shikata
发明人： Yoshitaka Sugawara , Katsunori Asano , Mitsuru Matsukawa , Yoshifumi Minowa , Toshihiko Shikata
IPC分类号： H02M7/5387
CPC分类号： H02M7/521 , H02M1/32 , H02M1/38 , H02M2001/0012
摘要： A problem to be solved by the present invention is to eliminate variation in potential in a turn-off time period of each GTO element, and to stabilize a gate drawing current by surely performing the turn-off of the GTO element. In an inverter apparatus (11) having a three-phase inverter (14) configured to include paired GTO elements UP, UN, VP, VN, WP, and WN connected in a bridge configuration and to convert a power supply voltage, which is supplied from a dc power supply (13), by the GTO elements UP, UN, VP, VN, WP, and WN into an ac voltage, an inverter control portion has a simultaneous switching prevention function of delaying a turn-on operation of each of the GTO elements VN and WN, which correspond to phases other than a phase corresponding to an optional one of the GTO elements and also correspond to an electrode opposite to an electrode corresponding to the optional one of the GTO elements, for example, the GTO element UP, by a predetermined time in a case where a turn-on command signal for turning on each of the GTO elements VN and WN, which correspond to the other phases, is generated within a predetermined time period since the turn-off of the optional one of the GTO elements.
摘要翻译：本发明要解决的问题是消除每个GTO元件的关断时间段中的电位变化，并且通过可靠地执行GTO元件的关断来稳定栅极引出电流。在具有三相逆变器（14）的逆变器装置（11）中，被配置为包括以桥式配置连接的配对GTO元件UP，UN，VP，VN，WP和WN，并且转换供给的电源电压通过GTO元件UP，UN，VP，VN，WP和WN从直流电源（13）到交流电压，逆变器控制部分具有同时切换防止功能，延迟每个的接通操作 GTO元件VN和WN，其对应于除了与GTO元件中的任选一个相对应的相位之外的相位，并且还对应于与对应于GTO元件中的任选一个的电极相对的电极，例如GTO元件在从可选择性的关闭之后的预定时间段内产生用于接通与其他相位对应的GTO元件VN和WN的每个的导通命令信号的情况下的预定时间其中一个GTO元素。

4. 发明授权

US07570502B2 Inverter apparatus comprising switching elements 失效
标题翻译：包括开关元件的逆变器装置
公开(公告)号：US07570502B2
公开(公告)日：2009-08-04
申请号：US10565389
申请日：2004-07-23
申请人： Yoshitaka Sugawara , Katsunori Asano , Mitsuru Matsukawa , Yoshifumi Minowa , Toshihiko Shikata
发明人： Yoshitaka Sugawara , Katsunori Asano , Mitsuru Matsukawa , Yoshifumi Minowa , Toshihiko Shikata
IPC分类号： H02M7/5387
CPC分类号： H02M7/521 , H02M1/32 , H02M1/38 , H02M2001/0012
摘要： A problem to be solved by the present invention is to eliminate variation in potential in a turn-off time period of each GTO element, and to stabilize a gate drawing current by surely performing the turn-off of the GTO element. In an inverter apparatus having a three-phase inverter configured to include paired GTO elements an inverter control portion has a simultaneous switching prevention function of delaying a turn-on operation of each of the GTO elements which correspond to phases other than a phase corresponding to an optional one of the GTO elements and also correspond to an electrode opposite to an electrode corresponding to the optional one of the GTO elements by a predetermined time in a case where a turn-on command signal for turning on each of the GTO elements is generated within a predetermined time period since the turn-off of the optional one of the GTO elements.
摘要翻译：本发明要解决的问题是消除每个GTO元件的关断时间段中的电位变化，并且通过可靠地执行GTO元件的关断来稳定栅极引出电流。在具有配置为包括成对的GTO元件的三相逆变器的逆变器装置中，逆变器控制部具有同时切换防止功能，其延迟对应于除了相应于相同的相位之外的相位的每个GTO元件的接通操作在GTO元件中可选的一个，并且在用于接通每个GTO元件的接通命令信号的情况下，也对应于与对应于GTO元件中的任选一个GTO元件的电极相对预定时间的电极自从关闭任选的一个GTO元件以来的预定时间段。

5. 发明授权

US06326796B1 Harmonic measuring method and a current injection device for harmonic measurement 失效
标题翻译：谐波测量方法和谐波测量电流注入装置
公开(公告)号：US06326796B1
公开(公告)日：2001-12-04
申请号：US09110997
申请日：1998-07-06
申请人： Isao Koda , Masakazu Tsukamoto , Shoji Nishimura , Katsuhiko Uno , Yasuyuki Natsuda , Yoshifumi Minowa
发明人： Isao Koda , Masakazu Tsukamoto , Shoji Nishimura , Katsuhiko Uno , Yasuyuki Natsuda , Yoshifumi Minowa
IPC分类号： G01R2316
CPC分类号： G01R19/2513 , G01R23/20
摘要： A harmonic injection point a is set on a power line extending downstream from a harmonic measuring point b in an electric power system. The currents of interharmonics are injected to the harmonic injection point a by a current injection device. The frequencies of the interharmonics are located on both sides of the frequency of an n-th targeted harmonic in frequency spectrum and each of the frequencies is a nonintegral multiple of the frequency of a fundamental wave of an electric power transmitted by the electric power system. The current values and voltage values of the interharmonics at the harmonic measuring point are detected to thereby obtain admittance values of an equivalent circuit of a power line extending upstream from the harmonic measuring point b when the interharmonics flow therethrough. An admittance value of the equivalent circuit of the power line when the targeted harmonic flows therethrough is determined by interpolating the admittance values for the interharmonics. Measurement is made of a harmonic characteristic of the power line extending upstream from the harmonic measuring point b, which is set at a point located upstream from the harmonic injection point a.
摘要翻译：谐波注入点a设置在电力系统中从谐波测量点b的下游延伸的电力线上。通过电流注入装置将间谐波注入到谐波注入点a。间谐波的频率位于频谱中第n个目标谐波的频率的两侧，并且每个频率是由电力系统发送的电力的基波的频率的非整数倍。检测谐波测量点的间谐波的电流值和电压值，从而获得当谐波测量点b从上升到谐波测量点b的上游的电力线的等效电路的导纳值。通过内插间谐波的导纳值来确定目标谐波流过的电力线的等效电路的导纳值。由谐波测量点b上游延伸的电力线的谐波特性进行测量，该谐波测量点b设置在位于谐波注入点a上游的点。

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