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1. 发明授权

US06353543B2 Switching circuit of power conversion apparatus 失效
标题翻译：电力转换装置的开关电路
公开(公告)号：US06353543B2
公开(公告)日：2002-03-05
申请号：US09858341
申请日：2001-05-14
申请人： Kazuyuki Itoh , Yoshihisa Okita , Katsuaki Tanaka
发明人： Kazuyuki Itoh , Yoshihisa Okita , Katsuaki Tanaka
IPC分类号： H02M3335
CPC分类号： H02M7/5387 , H02M3/1584 , H02M3/33576
摘要： A switching circuit for a power conversion apparatus capable of reducing conduction loss to provide a higher efficiency, and achieving downsizing and weight-reduction and higher driving frequency based on the improved efficiency is disclosed. A driving transistor is connected to a switching main transistor to supply a driving power for ON-OFF driving thereto, and an auxiliary power source composed of a current transformer is provided between the main transistor and the driving transistor. An auxiliary transistor having a lower switching loss than that of the main transistor is connected in parallel with the main transistor to form a main switch in combination with the main transistor. A current-driven type transistor serves as the main transistor, and voltage-driven type transistors serve as both of the driving transistor and the auxiliary transistor. The auxiliary transistor is adapted to be driven at a higher speed than that of the main transistor when the main transistor is turned on, and adapted to be driven at a lower speed than that of the main transistor when the main transistor is turned off.
摘要翻译：公开了一种用于能够降低传导损耗以提供更高效率并且基于提高的效率实现小型化和减轻重量并且实现更高驱动频率的功率转换装置的开关电路。驱动晶体管连接到开关主晶体管以提供用于导通驱动的驱动电源，并且在主晶体管和驱动晶体管之间设置由电流互感器组成的辅助电源。具有比主晶体管低的开关损耗的辅助晶体管与主晶体管并联连接以与主晶体管组合形成主开关。电流驱动型晶体管用作主晶体管，电压驱动型晶体管用作驱动晶体管和辅助晶体管两者。当主晶体管导通时，辅助晶体管适于以比主晶体管更高的速度被驱动，并且当主晶体管截止时，辅助晶体管适于以比主晶体管低的速度被驱动。

2. 发明授权

US06208541B1 PWM inverter apparatus 有权
标题翻译： PWM逆变器装置
公开(公告)号：US06208541B1
公开(公告)日：2001-03-27
申请号：US09599926
申请日：2000-06-22
申请人： Kazuyuki Itoh , Yoshihisa Okita , Katsuaki Tanaka
发明人： Kazuyuki Itoh , Yoshihisa Okita , Katsuaki Tanaka
IPC分类号： H02M324
CPC分类号： H02M7/538 , H02M2001/0048 , Y02B70/1491
摘要： This PWM inverter apparatus includes a first and second current control type semiconductor switching elements connected in series which are connected in parallel to a DC power supply. An output is generated by alternately switching the first and second semiconductor switching elements. Resistive semiconductor switching elements having a higher switching speed than the first and second semiconductor switching elements and a resistance-to-current characteristics producing a voltage drop are respectively connected in parallel to respective the first and second semiconductor switching elements. In a half cycle of an alternating output current, while the output current is higher than a predetermined rate with respect to a peak current, a switching timing is controlled to produce a switching control signal to the resistive semiconductor switching elements ahead of a switching control signal to the first and second semiconductor switching elements, and to terminate the switching control signal to the resistive semiconductor switching elements at a time when a predetermined period passes after the switching control signal given to the first and second semiconductor switching elements has been terminated. In the half cycle of the alternating output current, while the output current is lower than the predetermined rate with respect to the peak current, the switching timing is controlled to generate the output by the switching operation only of the resistive semiconductor switching elements.
摘要翻译：该PWM逆变器装置包括并联连接到DC电源的串联连接的第一和第二电流控制型半导体开关元件。通过交替地切换第一和第二半导体开关元件来产生输出。具有比第一和第二半导体开关元件更高的开关速度的电阻半导体开关元件和产生电压降的电阻 - 电流特性分别并联连接到第一和第二半导体开关元件。在交流输出电流的半周期中，当输出电流相对于峰值电流高于预定速率时，控制切换定时以在切换控制信号之前产生到电阻性半导体开关元件的切换控制信号并且在给予第一和第二半导体开关元件的开关控制信号已经终止之后，在预定周期经过时，将开关控制信号终止于电阻性半导体开关元件。在交流输出电流的半周期中，当输出电流相对于峰值电流低于预定速率时，控制开关定时以仅通过电阻式半导体开关元件的开关操作产生输出。

3. 发明授权

US06438004B1 Power conversion apparatus utilizing soft switching resonant snubber circuitry 失效
标题翻译：利用软开关谐振缓冲电路的电力转换装置
公开(公告)号：US06438004B1
公开(公告)日：2002-08-20
申请号：US10033412
申请日：2001-12-26
申请人： Katsuaki Tanaka , Yoshihisa Okita , Kazuyuki Itoh
发明人： Katsuaki Tanaka , Yoshihisa Okita , Kazuyuki Itoh
IPC分类号： H02H7122
CPC分类号： H02M7/5233 , H02M1/12 , H02M7/4826 , H02M2001/0048 , Y02B70/1491
摘要： The present invention discloses a power conversion apparatus comprising a control circuit for generating a switching signal at the timing allowing soft-switching to be achieved, and free from any occurrence of ripple. The power conversion apparatus includes a first main switch (Q1) and a second main switch (Q2) which are connected in series with each other. One of the ends of the first main switch is connected with the positive side of a DC power supply, and one of the ends of the second main switch is connected to the negative side of the DC power supply. A diode (D1, D2) is connected in parallel with each of the main switches so as to become reverse biased with respect to the DC power supply. A main-switch snubber capacitor (C1, C2) is connected in parallel with each of the main switches. A load is connected with the junction between the pair of main switches, and the main switches are controllably switched according a switching signal from a control circuit to generate an output. A first auxiliary resonant circuit including serial-connected first and second auxiliary switches (Q3, Q4, Q5, Q6) and a resonant inductor (L1) connected in series with the second auxiliary switch is connected with each of the positive side of the DC power supply and the junction between the two main switches. A diode is connected to each of the first and second auxiliary switches so as to become reverse biased with respect to the DC power supply. The control circuit provides a turn-on signal to the first and second auxiliary switches according to a voltage signal as an input representing the voltage across each of the main switches and auxiliary switches from voltage detecting means before a turn-on signal as the switching signal is provided to the first main switch.
摘要翻译：本发明公开了一种电力转换装置，包括控制电路，用于在允许实现软切换的时刻产生开关信号，并且不发生纹波。电力转换装置包括第一主开关（Q1）和第二主开关（Q2），它们彼此串联连接。第一主开关的一端与直流电源的正极连接，第二主开关的一端与直流电源的负极连接。二极管（D1，D2）与每个主开关并联连接，以便相对于直流电源反向偏置。主开关缓冲电容器（C1，C2）与每个主开关并联连接。负载与一对主开关之间的连接点连接，并且主开关根据来自控制电路的开关信号可控地切换以产生输出。包括串联连接的第一和第二辅助开关（Q3，Q4，Q5，Q6）和与第二辅助开关串联连接的谐振电感器（L1）的第一辅助谐振电路与直流电源的正极侧供应和两个主开关之间的连接处。二极管连接到第一和第二辅助开关中的每一个，以便相对于直流电源反向偏置。控制电路根据作为输入的电压信号向第一辅助开关和第二辅助开关提供导通信号，该输入表示在作为开关信号的导通信号之前，来自电压检测装置的每个主开关和辅助开关上的电压被提供给第一主开关。

4. 发明授权

US06414854B2 Driving device and method of switching element in power conversion apparatus using current-controlled semiconductor switching element 失效
公开(公告)号：US06414854B2
公开(公告)日：2002-07-02
申请号：US09873606
申请日：2001-09-07
申请人： Kazuyuki Itoh , Yoshihisa Okita , Katsuaki Tanaka , Yoshinobu Takayanagi
发明人： Kazuyuki Itoh , Yoshihisa Okita , Katsuaki Tanaka , Yoshinobu Takayanagi
IPC分类号： H02M3335
CPC分类号： H02M1/08 , H02M3/155 , H02M2001/0048 , Y02B70/1491
摘要： In a power conversion apparatus using a semiconductor switching element, a collector-emitter voltage detecting device is provided to detect the collector-emitter voltage in the semiconductor switching element in the power conversion apparatus in order to comprehensively reduce switching loss and conduction loss arising in a switching element. A base current supplied to the switching element is controlled based on the detected collector-emitter voltage so as to control the collector-emitter voltage or control a regenerative power to be transmitted from a switching element driving power supply to an external auxiliary power supply or the like. This provides an optimum driving in consideration of factors including dispersion in a specific current amplification factor (hfe) of the switching element, variance in the hfe caused by temperature, and variance in the hfe to a current flowing through the switching element, for reducing a sum of conduction loss and driving power of the switching element.

5. 发明授权

US06614667B1 Method and apparatus for driving switching element in power converter 失效
标题翻译：用于驱动电源转换器中的开关元件的方法和装置
公开(公告)号：US06614667B1
公开(公告)日：2003-09-02
申请号：US09830102
申请日：2001-04-23
申请人： Kazuyuki Itoh , Yoshihisa Okita , Katsuaki Tanaka , Yoshinobu Takayanagi
发明人： Kazuyuki Itoh , Yoshihisa Okita , Katsuaki Tanaka , Yoshinobu Takayanagi
IPC分类号： H02M3335
CPC分类号： H02M1/08 , H03K17/04213 , H03K17/0424 , H03K2217/0036
摘要： A power conversion apparatus capable of reducing the conduction loss to achieve high efficiency yielding a downsized and weight-reduced apparatus and a method for driving such a power conversion apparatus is disclosed. A power conversion apparatus comprising a switching-element driving circuit which includes a current transformer having a primary coil connected to an current control type switching element, and a driving-current generating circuit formed of a secondary coil of the current transformer and a rectifying circuit connected to the secondary coil, wherein an output current generated in the driving-current generating circuit is supplied to the switching element as a driving current of the switching element, and a method for driving the switching element of such a power conversion apparatus are disclosed. This method comprises the steps of detecting an output current of the switching element, and extracting a part of the output current of the driving-current generating circuit out of the switching-element driving circuit so as to variably controlling the driving current of the switching element in response to the output current of the switching element. Preferably, the output current of the driving-current generating circuit extracted out of the switching-element driving circuit is supplied to any other auxiliary power supply as a regenerative power.
摘要翻译：公开了一种能够降低传导损耗以实现高效率产生小型化和减重装置的电力转换装置和用于驱动这种电力转换装置的方法。一种电力转换装置，包括开关元件驱动电路，该开关元件驱动电路包括具有连接到电流控制型开关元件的初级线圈的电流互感器以及由电流互感器的次级线圈形成的驱动电流产生电路和连接到电流互感器的整流电路到二次线圈，其中在驱动电流产生电路中产生的输出电流作为开关元件的驱动电流被提供给开关元件，并且公开了一种用于驱动这种电力转换装置的开关元件的方法。该方法包括以下步骤：检测开关元件的输出电流，并将驱动电流产生电路的输出电流的一部分提取出开关元件驱动电路，以便可变地控制开关元件的驱动电流响应于开关元件的输出电流。优选地，从开关元件驱动电路抽出的驱动电流产生电路的输出电流作为再生电力被提供给任何其它辅助电源。

6. 发明授权

US06316931B1 Magnetic sensor apparatus and current sensor apparatus 失效
标题翻译：磁传感器装置和电流传感器装置
公开(公告)号：US06316931B1
公开(公告)日：2001-11-13
申请号：US09484796
申请日：2000-01-18
申请人： Shiro Nakagawa , Kazuyuki Itoh , Yoshihisa Okita , Katsumi Yabusaki
发明人： Shiro Nakagawa , Kazuyuki Itoh , Yoshihisa Okita , Katsumi Yabusaki
IPC分类号： G01R3300
CPC分类号： G01V3/101 , G01R15/20
摘要： It is an object of the invention to provide a magnetic sensor and a current sensor that exhibit high performance at low costs. A magnetic sensor has a magnetic core (1) having a magnetic saturation property and a sensor coil (2) wound around the magnetic core (1). An end of a detection coil (20) is connected to an end of the sensor coil (2). The other end of the detection coil (20) is grounded. The magnetic sensor further comprises a drive circuit (3) and a detection circuit (4). The drive circuit (3) has a series resonance circuit part of which is made up of the sensor coil (2). To the sensor coil (2) the drive circuit (3) supplies a resonance current flowing into the series resonance circuit as an alternating current that allows the magnetic core (1) to reach a saturation region. The detection circuit (4) detects a magnetic field to be measured by detecting variations in resonance current flowing through the sensor coil (2).
摘要翻译：本发明的目的是提供一种以低成本呈现高性能的磁传感器和电流传感器。磁传感器具有磁饱和特性的磁芯（1）和缠绕在磁芯（1）上的传感器线圈（2）。检测线圈（20）的一端连接到传感器线圈（2）的一端。检测线圈（20）的另一端接地。磁传感器还包括驱动电路（3）和检测电路（4）。驱动电路（3）的串联谐振电路部分由传感器线圈（2）构成。驱动电路（3）向传感器线圈（2）提供作为允许磁芯（1）达到饱和区域的交流电流流入串联谐振电路的谐振电流。检测电路（4）通过检测流过传感器线圈（2）的谐振电流的变化来检测要测量的磁场。

7. 发明授权

US06411078B1 Current sensor apparatus 失效
标题翻译：电流传感器装置
公开(公告)号：US06411078B1
公开(公告)日：2002-06-25
申请号：US09487802
申请日：2000-01-20
申请人： Shiro Nakagawa , Kazuyuki Itoh , Katsuaki Tanaka , Katsumi Yabusaki
发明人： Shiro Nakagawa , Kazuyuki Itoh , Katsuaki Tanaka , Katsumi Yabusaki
IPC分类号： G01R3300
CPC分类号： G01R15/20 , G01R15/183
摘要： It is an object of the invention to provide a current sensor apparatus that reduces measurement errors resulting from variations in a position of a current path passing through the space inside a magnetic yoke. The current sensor apparatus comprises a ring-shaped magnetic yoke (2) surrounding a current path (1), part of the yoke having a gap (3), and a magnetic sensor element (4) placed in the gap (3) of the magnetic yoke (2). The magnetic sensor element (4) detects a magnetic field in the gap (3) generated by a current flowing through the current path (1) to measure the current flowing through the current path (1). The current sensor apparatus further comprises a magnetic field interrupter (5), placed between the current path (1) and the gap (3), for interrupting a magnetic field corresponding to a magnetic flux generated by the current passing through the current path (1) and not passing through the magnetic yoke (2), so that the magnetic field would not reach the magnetic sensor element (4).
摘要翻译：本发明的目的是提供一种电流传感器装置，该电流传感器装置减少了通过磁轭内的空间的电流路径的位置变化引起的测量误差。电流传感器装置包括围绕电流路径（1）的环形磁轭（2），具有间隙（3）的磁轭的一部分和放置在电机的间隙（3）中的磁传感器元件（4）磁轭（2）。磁传感器元件（4）检测由流过电流路径（1）的电流产生的间隙（3）中的磁场，以测量流过电流通路（1）的电流。电流传感器装置还包括设置在电流路径（1）和间隙（3）之间的磁场断续器（5），用于中断与通过电流路径（1）的电流产生的磁通相对应的磁场）并且不通过磁轭（2），使得磁场将不会到达磁性传感器元件（4）。

8. 发明授权

US07049793B2 Boost switching power supply 有权
标题翻译：升压开关电源
公开(公告)号：US07049793B2
公开(公告)日：2006-05-23
申请号：US10380262
申请日：2001-09-19
申请人： Kazuyuki Itoh , Katsuaki Tanaka
发明人： Kazuyuki Itoh , Katsuaki Tanaka
IPC分类号： G05F1/652
CPC分类号： H02M3/158
摘要： The present invention provides a boost switching power supply with low switching loss. The boost switching power supply of the present invention includes a coil portion 3a and a first diode 4 that are serially connected between one terminal of a DC power source 2 and one terminal of a first capacitor 5 for smoothing, a first switching element 8 connected between a node A where the coil portion 3a and the first diode 4 are connected and the other terminal of the DC power source 2, a second magnetic element 7 and a second switching element 9 that are serially connected between the node A and the other terminal of the DC power source 2, and a second diode 10 and a second capacitor 11 that are serially connected between a node where the second magnetic element 7 and the second switching element 9 are connected and the node A. According to the present invention, the switching loss of the second switching element 9 is reduced substantially because when the second switching element 9 turns ON, the increase of the current flowing in the second switching element 9 is restricted by the second magnetic element 7 and when the second switching element 9 turns OFF, the increase in voltage across the electrodes of the second switching element is restricted by the charging the second capacitor 11.
摘要翻译：本发明提供具有低开关损耗的升压开关电源。本发明的升压开关电源包括串联连接在直流电源2的一个端子和第一电容器5的一个端子之间用于平滑的线圈部分3a和第一二极管4，第一开关元件8连接在线圈部分3a和第一二极管4连接的节点A和直流电源2的另一个端子之间，串联地连接在节点A和另一个之间的第二磁性元件7和第二开关元件9 直流电源2的端子，以及串联连接在第二磁性元件7和第二开关元件9的节点与节点A之间的第二二极管10和第二电容器11.根据本发明，第二开关元件9的开关损耗大大降低，因为当第二开关元件9接通时，流过第二开关元件9的电流的增加受到限制通过第二磁性元件7，并且当第二开关元件9截止时，通过对第二电容器11充电来限制第二开关元件的电极两端的电压的增加。

9. 外观设计

USD436085S1 Piezoelectric conversion type semiconductor device 失效
公开(公告)号：USD436085S1
公开(公告)日：2001-01-09
申请号：US29106665
申请日：1999-06-18
申请人： Takashi Takizawa , Tatsuya Itoh , Kazuyuki Itoh
设计人： Takashi Takizawa , Tatsuya Itoh , Kazuyuki Itoh

10. 发明授权

US06945605B2 Chair having a slide mechanism for the seat 失效
标题翻译：座椅具有滑座机构
公开(公告)号：US06945605B2
公开(公告)日：2005-09-20
申请号：US10130750
申请日：2001-10-09
申请人： Yojiro Kinoshita , Nobuyuki Ueda , Toshiyuki Horiki , Kazuyuki Itoh , Hiroyuki Nishimura
发明人： Yojiro Kinoshita , Nobuyuki Ueda , Toshiyuki Horiki , Kazuyuki Itoh , Hiroyuki Nishimura
IPC分类号： A47C1/023 , A47C1/032 , A47C7/44 , A47C1/022 , A47C1/024
CPC分类号： A47C7/405 , A47C1/023 , A47C1/03255 , A47C7/46
摘要： A chair includes a seat portion 1(1B), a seat support 2(2B) supporting the seat portion 1, a rear seat support 3(3B) extending rearwardly upwardly relative to the seat support 2(2B), and a slide mechanism X1 (moving mechanism XB) for causing the seat portion 1(1B) to slide back and forth relative to the seat support 2 (2B). The chair is provided with a locking mechanism 100C for locking the seat portion 6C at a desired position in the fore-and-aft direction selectively, and a lever 110C for operating the locking mechanism 100C, the lever 110C being located at a position allowing the lever 110C to move together with the seat portion 6C in the fore-and-aft direction.
摘要翻译：座椅包括座部1（1B），支撑座部1的座椅支撑件2（2B），相对于座椅支撑件2（2B）向后向后延伸的后座椅支撑件3（3B），以及用于使座椅部分1（1B）相对于座椅支撑件2（2B）前后滑动的滑动机构X 1（移动机构XB）。椅子设置有用于将座椅部分6C选择性地沿着前后方向锁定在期望位置的锁定机构100C，以及用于操作锁定机构100C的杆110C，杆110C位于在允许杆110C与座部6C一起在前后方向上移动的位置。

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