公开(公告)号：US20110168697A1

公开(公告)日：2011-07-14

申请号：US13062302

申请日：2010-07-30

申请人： Shun Kazama ,  Masaki Tagome ,  Makoto Kitabatake

发明人： Shun Kazama ,  Masaki Tagome ,  Makoto Kitabatake

IPC分类号： H05B6/04 ,  H02M7/44

CPC分类号： H05B6/062 ,  H02M1/14 ,  H05B6/04

摘要： To aim to reduce ripple current flowing through a capacitor in a power converter apparatus including a converter, the capacitor and an inverter. A current sensor 6 is connected between a capacitor 5 and an inverter circuit 7 for detecting current Iinv flowing from the capacitor 5 to the inverter circuit 7. A frequency detecting subunit 11 performs fast Fourier transform on a waveform of the current Iinv to detect a frequency of a frequency component having the largest amplitude. Also, the frequency detecting subunit 12 detects a zero-cross point of the frequency component having the largest amplitude. Then a carrier signal control subunit 13 performs control such that a frequency and a rise time of a PWM carrier signal for driving the converter circuit 4 match the frequency and the zero-cross point that have been detected by the frequency detecting subunit 11 and the phase detecting subunit 12.

摘要翻译： 旨在减少在包括转换器，电容器和逆变器的功率转换器装置中流过电容器的纹波电流。 电流传感器6连接在电容器5和逆变器电路7之间，用于检测从电容器5流向逆变器电路7的电流Iinv。频率检测子单元11对电流Iinv的波形执行快速傅里叶变换，以检测频率 具有最大振幅的频率分量。 此外，频率检测子单元12检测具有最大振幅的频率分量的零交叉点。 然后，载波信号控制子单元13执行控制，使得用于驱动转换器电路4的PWM载波信号的频率和上升时间与由频率检测子单元11检测到的频率和零交叉点相匹配， 检测子单元12。

公开(公告)号：US08885368B2

公开(公告)日：2014-11-11

申请号：US13641757

申请日：2011-06-17

申请人： Shun Kazama ,  Masaki Tagome ,  Makoto Kitabatake

发明人： Shun Kazama ,  Masaki Tagome ,  Makoto Kitabatake

IPC分类号： H02M1/12 ,  H02M7/5387 ,  H02M7/497 ,  H02M1/15 ,  H03K17/16

CPC分类号： H03K17/164 ,  H02M1/15 ,  H02M7/497 ,  H02M7/5387

摘要： A power converter for effectively reducing switching noise is provided. The power converter comprises a capacitor 111; switching devices Q11a and Q11b connected to the capacitor 111 in parallel; and a controller 105 that controls each switching device individually to perform switching operations. Each of the switching devices Q11a and Q11b forms a closed circuit together with the capacitor 111. The controller 105 controls the switching devices Q11a and Q11b to perform switching operations of switching ON or OFF at different timings such that at least two closed circuits including the switching devices Q11a and Q11b mutually cancel ringing voltages occurring therein, each ringing voltage occurring due to the switching operations performed by a corresponding switching device and having a frequency defined by an inductance of a corresponding closed circuit and an output capacity of a switching device included in the corresponding closed circuit.

摘要翻译： 提供了一种有效降低开关噪声的电源转换器。 功率转换器包括电容器111; 并联连接到电容器111的开关器件Q11a和Q11b; 以及控制器105，其分别控制各开关装置进行切换动作。 开关装置Q11a，Q11b与电容器111一起形成闭合电路。控制部105控制切换装置Q11a，Q11b，在不同的定时进行接通或断开的切换动作，使至少包含切换的2个闭合电路 设备Q11a和Q11b相互抵消其中发生的振铃电压，由于由相应的开关装置执行的开关操作而产生的振铃电压，并且具有由相应的闭合电路的电感和包括在其中的开关装置的输出容量定义的频率 相应闭路。

公开(公告)号：US08680794B2

公开(公告)日：2014-03-25

申请号：US13133775

申请日：2010-11-18

申请人： Shun Kazama ,  Makoto Kitabatake ,  Masaki Tagome

发明人： Shun Kazama ,  Makoto Kitabatake ,  Masaki Tagome

IPC分类号： H02P5/68

CPC分类号： H02M7/53871 ,  B60L1/003 ,  B60L1/02 ,  B60L11/1803 ,  B60L15/08 ,  B60L2210/40 ,  B60L2220/14 ,  B60L2220/16 ,  B60L2220/46 ,  B60L2270/147 ,  H02M2001/008 ,  H02P27/08 ,  Y02T10/644 ,  Y02T10/645 ,  Y02T10/7005 ,  Y02T10/7241 ,  Y10T307/406

摘要： A small-sized load drive system which, even with three three-phase inverters, significantly reduces noise regardless of control duty ratio. The load drive system includes three-phase inverters, and first, second, and third control units. The inverters are connected to loads, respectively. The first control unit generates sawtooth wave voltage and controls the inverter according to the sawtooth wave voltage. The second control unit generates inverse sawtooth wave voltage and controls the inverter according to the inverse sawtooth wave voltage. The third control unit generates triangular wave voltage which has ramps respectively equal to the sawtooth/inverse sawtooth wave voltage and either has a same phase or is out of phase by half a period relative to the sawtooth/inverse sawtooth wave voltage, and also controls the inverter according to the triangular wave voltage.

摘要翻译： 即使使用三个三相逆变器，小型负载驱动系统也可以显着降低噪声，而不管控制占空比如何。 负载驱动系统包括三相逆变器以及第一，第二和第三控制单元。 逆变器分别连接到负载。 第一控制单元产生锯齿波电压，并根据锯齿波电压控制逆变器。 第二控制单元产生反锯齿波电压，并根据逆锯齿波电压控制逆变器。 第三控制单元产生三角波电压，其三角波电压分别等于锯齿波/反锯齿波电压，并且相对于锯齿波/反锯齿波电压具有相同相位或相位相差一半的周期，并且还控制 变频器根据三角波电压。

公开(公告)号：US20130039100A1

公开(公告)日：2013-02-14

申请号：US13641757

申请日：2011-06-17

申请人： Shun Kazama ,  Masaki Tagome ,  Makoto Kitabatake

发明人： Shun Kazama ,  Masaki Tagome ,  Makoto Kitabatake

IPC分类号： H02M1/12

CPC分类号： H03K17/164 ,  H02M1/15 ,  H02M7/497 ,  H02M7/5387

摘要： A power converter for effectively reducing switching noise is provided. The power converter comprises a capacitor 111; switching devices Q11a and Q11b connected to the capacitor 111 in parallel; and a controller 105 that controls each switching device individually to perform switching operations. Each of the switching devices Q11a and Q11b forms a closed circuit together with the capacitor 111. The controller 105 controls the switching devices Q11a and Q11b to perform switching operations of switching ON or OFF at different timings such that at least two closed circuits including the switching devices Q11a and Q11b mutually cancel ringing voltages occurring therein, each ringing voltage occurring due to the switching operations performed by a corresponding switching device and having a frequency defined by an inductance of a corresponding closed circuit and an output capacity of a switching device included in the corresponding closed circuit.

摘要翻译： 提供了一种有效降低开关噪声的电源转换器。 功率转换器包括电容器111; 并联连接到电容器111的开关器件Q11a和Q11b; 以及控制器105，其分别控制各开关装置进行切换动作。 开关装置Q11a，Q11b与电容器111一起形成闭合电路。控制部105控制切换装置Q11a，Q11b，在不同的定时进行接通或断开的切换动作，使至少包含切换的2个闭合电路 设备Q11a和Q11b相互抵消其中发生的振铃电压，由于由相应的开关装置执行的开关操作而产生的振铃电压，并且具有由相应的闭合电路的电感和包括在其中的开关装置的输出容量定义的频率 相应闭路。

公开(公告)号：US20120119690A1

公开(公告)日：2012-05-17

申请号：US13386966

申请日：2011-02-15

申请人： Noriyoshi Nishiyama ,  Makoto Kitabatake

发明人： Noriyoshi Nishiyama ,  Makoto Kitabatake

IPC分类号： H02P6/08 ,  H02K3/28

CPC分类号： H02K1/146 ,  H02K3/20 ,  H02K3/28 ,  H02K21/16 ,  H02K21/222 ,  H02P6/10 ,  H02P25/18

摘要： A synchronous motor drive system improves the design flexibility regarding torque characteristics as compared with conventionally available design flexibility. A synchronous motor has a rotor and a stator. Each of at least two adjacent stator teeth has a slit formed at the tip thereof. Each of a plurality of stator teeth has a main coil wound therearound in concentrated winding. Between each two adjacent teeth having a slit, a sub-coil is wound around in a manner of being accommodated in the respective slits. The drive device separately controls electric current supplied to the main coils and electric current supplied to the sub-coil.

摘要翻译： 与常规可用的设计灵活性相比，同步电机驱动系统提高了转矩特性的设计灵活性。 同步电动机具有转子和定子。 至少两个相邻的定子齿中的每一个在其尖端处形成有狭缝。 多个定子齿中的每一个具有卷绕在集中绕组上的主线圈。 在具有狭缝的每个两个相邻齿之间，子线圈以容纳在各个狭缝中的方式缠绕。 驱动装置分别控制供给主线圈的电流和供给到副线圈的电流。

公开(公告)号：US08896178B2

公开(公告)日：2014-11-25

申请号：US13386966

申请日：2011-02-15

申请人： Noriyoshi Nishiyama ,  Makoto Kitabatake

发明人： Noriyoshi Nishiyama ,  Makoto Kitabatake

IPC分类号： H02K3/28 ,  H02P6/08 ,  H02K21/16 ,  H02K3/16 ,  H02K3/20 ,  H02K29/12 ,  H02K1/14 ,  H02K21/22 ,  H02P6/10 ,  H02P25/18

CPC分类号： H02K1/146 ,  H02K3/20 ,  H02K3/28 ,  H02K21/16 ,  H02K21/222 ,  H02P6/10 ,  H02P25/18

摘要： A synchronous motor drive system improves the design flexibility regarding torque characteristics as compared with conventionally available design flexibility. A synchronous motor has a rotor and a stator. Each of at least two adjacent stator teeth has a slit formed at the tip thereof. Each of a plurality of stator teeth has a main coil wound therearound in concentrated winding. Between each two adjacent teeth having a slit, a sub-coil is wound around in a manner of being accommodated in the respective slits. The drive device separately controls electric current supplied to the main coils and electric current supplied to the sub-coil.

摘要翻译： 与常规可用的设计灵活性相比，同步电机驱动系统提高了转矩特性的设计灵活性。 同步电动机具有转子和定子。 至少两个相邻的定子齿中的每一个在其尖端处形成有狭缝。 多个定子齿中的每一个具有卷绕在集中绕组上的主线圈。 在具有狭缝的每个两个相邻齿之间，子线圈以容纳在各个狭缝中的方式缠绕。 驱动装置分别控制供给主线圈的电流和供给到副线圈的电流。

公开(公告)号：US08693226B2

公开(公告)日：2014-04-08

申请号：US13639182

申请日：2011-10-28

申请人： Makoto Kitabatake ,  Shun Kazama

发明人： Makoto Kitabatake ,  Shun Kazama

IPC分类号： H02M3/335

CPC分类号： H02M7/5387 ,  H01L29/1608 ,  H01L29/66068 ,  H01L29/7806 ,  H01L29/7828 ,  H02M7/003

摘要： An inverter comprising: a circuit including arms connected in parallel, each of the arms including a first switch and a second switch connected in series; and a gate drive circuit configured to control, by pulse-width modulation using synchronous rectification, each of the first switch and the second switch to switch to an on-state or an off-state, wherein each of the first switch and the second switch includes: a channel region that is conductive in both a forward direction and a reverse direction in the on-state, and that is not conductive in the forward direction in the off-state; and a diode region that is combined as one with the channel region, and that is conductive only in the reverse direction, the diode region being unipolar, and the gate drive circuit synchronizes a timing at which the gate drive circuit outputs a signal for causing the first switch to switch to the on-state with a timing at which the gate drive circuit outputs a signal for causing the second switch to switch to the off-state, and synchronizes a timing at which the gate drive circuit outputs a signal for causing the first switch to switch to the off-state with a timing at which the gate drive circuit outputs a signal for causing the second switch to switch to the on-state.

摘要翻译： 一种逆变器，包括：包括并联连接的臂的电路，每个臂包括串联连接的第一开关和第二开关; 以及栅极驱动电路，被配置为通过使用同步整流的脉冲宽度调制来控制第一开关和第二开关中的每一个以切换到导通状态或截止状态，其中第一开关和第二开关 包括：在导通状态下在正向和反向都是导通的沟道区，并且在截止状态下在正向上不导通; 以及二极管区域，其与沟道区域一体化，并且仅在相反方向上导通，二极管区域是单极的，并且栅极驱动电路同步门驱动电路输出信号的定时， 第一开关切换到导通状态，栅极驱动电路输出用于使第二开关切换到截止状态的信号的定时，并且使门驱动电路输出用于使 第一开关以栅极驱动电路输出用于使第二开关切换到导通状态的信号的定时切换到断开状态。

公开(公告)号：US20130021831A1

公开(公告)日：2013-01-24

申请号：US13639182

申请日：2011-10-28

申请人： Makoto Kitabatake ,  Shun Kazama

发明人： Makoto Kitabatake ,  Shun Kazama

IPC分类号： H02M7/538

CPC分类号： H02M7/5387 ,  H01L29/1608 ,  H01L29/66068 ,  H01L29/7806 ,  H01L29/7828 ,  H02M7/003

摘要： An inverter comprising: a circuit including arms connected in parallel, each of the arms including a first switch and a second switch connected in series; and a gate drive circuit configured to control, by pulse-width modulation using synchronous rectification, each of the first switch and the second switch to switch to an on-state or an off-state, wherein each of the first switch and the second switch includes: a channel region that is conductive in both a forward direction and a reverse direction in the on-state, and that is not conductive in the forward direction in the off-state; and a diode region that is combined as one with the channel region, and that is conductive only in the reverse direction, the diode region being unipolar, and the gate drive circuit synchronizes a timing at which the gate drive circuit outputs a signal for causing the first switch to switch to the on-state with a timing at which the gate drive circuit outputs a signal for causing the second switch to switch to the off-state, and synchronizes a timing at which the gate drive circuit outputs a signal for causing the first switch to switch to the off-state with a timing at which the gate drive circuit outputs a signal for causing the second switch to switch to the on-state.

摘要翻译： 一种逆变器，包括：包括并联连接的臂的电路，每个臂包括串联连接的第一开关和第二开关; 以及栅极驱动电路，被配置为通过使用同步整流的脉冲宽度调制来控制第一开关和第二开关中的每一个以切换到导通状态或截止状态，其中第一开关和第二开关 包括：在导通状态下在正向和反向都是导通的沟道区，并且在截止状态下在正向上不导通; 以及二极管区域，其与沟道区域一体化，并且仅在相反方向上导通，二极管区域是单极的，并且栅极驱动电路同步门驱动电路输出信号的定时， 第一开关切换到导通状态，栅极驱动电路输出用于使第二开关切换到截止状态的信号的定时，并且使门驱动电路输出用于使 第一开关以栅极驱动电路输出用于使第二开关切换到导通状态的信号的定时切换到断开状态。

公开(公告)号：US07846828B2

公开(公告)日：2010-12-07

申请号：US12338395

申请日：2008-12-18

申请人： Osamu Kusumoto ,  Makoto Kitabatake ,  Masao Uchida ,  Kunimasa Takahashi ,  Kenya Yamashita ,  Masahiro Hagio ,  Kazuyuki Sawada

发明人： Osamu Kusumoto ,  Makoto Kitabatake ,  Masao Uchida ,  Kunimasa Takahashi ,  Kenya Yamashita ,  Masahiro Hagio ,  Kazuyuki Sawada

IPC分类号： H01L21/28 ,  H01L21/44

CPC分类号： H01L29/7828 ,  H01L21/046 ,  H01L21/0475 ,  H01L21/0485 ,  H01L21/30625 ,  H01L29/1029 ,  H01L29/105 ,  H01L29/1608 ,  H01L29/365 ,  H01L29/41766 ,  H01L29/66068 ,  H01L29/7838 ,  H01L29/812

摘要： Ion implantation is carried out to form a p-well region and a source region in parts of a high resistance SiC layer on a SiC substrate, and a carbon film is deposited over the substrate. With the carbon film deposited over the substrate, annealing for activating the implanted dopant ions is performed, and then the carbon film is removed. Thus, a smooth surface having hardly any surface roughness caused by the annealing is obtained. Furthermore, if a channel layer is epitaxially grown, the surface roughness of the channel layer is smaller than that of the underlying layer. Since the channel layer having a smooth surface is provided, it is possible to obtain a MISFET with a high current drive capability.

摘要翻译： 进行离子注入以在SiC衬底上的高电阻SiC层的部分中形成p阱区域和源极区域，并且在衬底上沉积碳膜。 通过沉积在基板上的碳膜，进行用于激活注入的掺杂离子的退火，然后除去碳膜。 因此，获得了退火几乎没有表面粗糙度的光滑表面。 此外，如果沟道层外延生长，则沟道层的表面粗糙度小于下层的表面粗糙度。 由于提供了具有平滑表面的沟道层，所以可以获得具有高电流驱动能力的MISFET。

公开(公告)号：US07462540B2

公开(公告)日：2008-12-09

申请号：US10553845

申请日：2005-01-28

申请人： Kunimasa Takahashi ,  Makoto Kitabatake ,  Kenya Yamashita ,  Masao Uchida ,  Osamu Kusumoto ,  Ryoko Miyanaga

发明人： Kunimasa Takahashi ,  Makoto Kitabatake ,  Kenya Yamashita ,  Masao Uchida ,  Osamu Kusumoto ,  Ryoko Miyanaga

IPC分类号： H01L21/00

CPC分类号： H01L21/046

摘要： A method for fabricating a semiconductor device includes the steps of implanting ions into a silicon carbide thin film (2) formed on a silicon carbide substrate (1), heating the silicon carbide substrate in a reduced pressure atmosphere to form a carbon layer (5) on the surface of the silicon carbide substrate, and performing activation annealing with respect to the silicon carbide substrate in an atmosphere under a pressure higher than in the step of forming the carbon layer (5) and at a temperature higher than in the step of forming the carbon layer (5).

摘要翻译： 一种制造半导体器件的方法包括以下步骤：将离子注入形成在碳化硅衬底（1）上的碳化硅薄膜（2）中，在减压气氛中加热碳化硅衬底以形成碳层（5） 在碳化硅衬底的表面上，并且在比形成碳层（5）的步骤高的压力的气氛中，并且在高于形成步骤的温度的气氛中，相对于碳化硅衬底进行激活退火 碳层（5）。