公开(公告)号：US6031746A

公开(公告)日：2000-02-29

申请号：US148559

申请日：1998-09-04

申请人： Robert Louis Steigerwald ,  William Frederick Wirth ,  Ljubisa Dragolijub Stevanovic ,  John Norton Park

发明人： Robert Louis Steigerwald ,  William Frederick Wirth ,  Ljubisa Dragolijub Stevanovic ,  John Norton Park

IPC分类号： H03F3/217 ,  H02M7/00

CPC分类号： H03F3/2171

摘要： A partial-voltage buck regulator controls a high-voltage bus to a full-bridge circuit such that overall switching losses are reduced and distributed. Low-voltage buck regulator devices are PWM-switched when high output voltage is needed, and high-voltage bridge devices are PWM-switched when low output voltage is needed. A variable input power supply, which may be operated in a high power factor mode, can adjust the input bus voltages to achieve optimum performance for a given magnetic resonance imaging sequence.

摘要翻译： 部分电压降压调节器将高压总线控制到全桥电路，从而减少和分配总开关损耗。 当需要高输出电压时，低压降压稳压器件被PWM切换，当需要低输出电压时，高压桥式器件被PWM切换。 可以在高功率因数模式下操作的可变输入电源可以调节输入总线电压以实现给定磁共振成像序列的最佳性能。

公开(公告)号：US08644037B2

公开(公告)日：2014-02-04

申请号：US12173549

申请日：2008-07-15

申请人： Ravisekhar Nadimpalli Raju ,  Richard S. Zhang ,  Ljubisa Dragolijub Stevanovic ,  Jeffrey Neal Slotnick ,  Robert Louis Steigerwald ,  Luis Jose Garces

发明人： Ravisekhar Nadimpalli Raju ,  Richard S. Zhang ,  Ljubisa Dragolijub Stevanovic ,  Jeffrey Neal Slotnick ,  Robert Louis Steigerwald ,  Luis Jose Garces

IPC分类号： H02M5/45 ,  H02M7/00

CPC分类号： H02M5/458 ,  H02M5/271

摘要： An AC-AC Converter for an AC source which in one embodiment has a first rectifier section rectifying the AC source into a first pulsed DC link voltage signal and a high frequency modulating section coupled to the first pulsed DC link voltage signal and producing a high frequency AC voltage signal. A high frequency transformer is coupled to the high frequency AC voltage signal producing a transformed high frequency AC signal. There is a second rectifier section coupled to the transformed high frequency AC signal and producing a second pulsed DC voltage signal and an unfolder section coupled to the second pulsed DC voltage signal and producing an output AC signal.

摘要翻译： 一种用于AC电源的AC-AC转换器，其在一个实施例中具有将AC源整流为第一脉冲DC链路电压信号的第一整流器部分和耦合到第一脉冲DC链路电压信号的高频调制部分，并产生高频 交流电压信号。 高频变压器耦合到产生变换的高频AC信号的高频AC电压信号。 存在耦合到变换的高频AC信号并产生第二脉冲DC电压信号的第二整流器部分和耦合到第二脉冲DC电压信号并产生输出AC信号的非转储部分。

公开(公告)号：US20100014325A1

公开(公告)日：2010-01-21

申请号：US12173549

申请日：2008-07-15

申请人： Ravisekhar Nadimpalli Raju ,  Richard S. Zhang ,  Ljubisa Dragolijub Stevanovic ,  Jeffrey Neal Slotnick ,  Robert Louis Steigerwald ,  Luis Jose Garces

发明人： Ravisekhar Nadimpalli Raju ,  Richard S. Zhang ,  Ljubisa Dragolijub Stevanovic ,  Jeffrey Neal Slotnick ,  Robert Louis Steigerwald ,  Luis Jose Garces

IPC分类号： H02M5/45

CPC分类号： H02M5/458 ,  H02M5/271

摘要： An AC-AC Converter for an AC source which in one embodiment has a first rectifier section rectifying the AC source into a first pulsed DC link voltage signal and a high frequency modulating section coupled to the first pulsed DC link voltage signal and producing a high frequency AC voltage signal. A high frequency transformer is coupled to the high frequency AC voltage signal producing a transformed high frequency AC signal. There is a second rectifier section coupled to the transformed high frequency AC signal and producing a second pulsed DC voltage signal and an unfolder section coupled to the second pulsed DC voltage signal and producing an output AC signal.

摘要翻译： 一种用于AC电源的AC-AC转换器，其在一个实施例中具有将AC源整流为第一脉冲DC链路电压信号的第一整流器部分和耦合到第一脉冲DC链路电压信号的高频调制部分，并产生高频 交流电压信号。 高频变压器耦合到产生变换的高频AC信号的高频AC电压信号。 存在耦合到变换的高频AC信号并产生第二脉冲DC电压信号的第二整流器部分和耦合到第二脉冲DC电压信号并产生输出AC信号的非转储部分。