公开(公告)号：US4967334A

公开(公告)日：1990-10-30

申请号：US406263

申请日：1989-09-12

申请人： Alexander Cook ,  John Dhyanchand ,  Rasappa Palaniappan ,  Dwight Schmitt

发明人： Alexander Cook ,  John Dhyanchand ,  Rasappa Palaniappan ,  Dwight Schmitt

IPC分类号： H02M1/12

CPC分类号： H02M1/12

摘要： A filter system for removing selected frequencies from AC power provided on at least two phase lines and a neutral line includes a phase-to-phase filter for removing a first selected AC component at a first frequency from the AC power wherein the frequency component has a line-to-phase displacement within first or second ranges. A phase-to-neutral filter is also provided for removing a second selected AC component at a second frequency different from the first frequency from the AC power wherein the second frequency component has a line-to-line phase displacement outside of the first and second ranges.

摘要翻译： 用于从至少两相线路和中性线路上提供的AC电力中去除所选频率的滤波器系统包括用于从AC功率移除第一频率的第一选定AC分量的相间滤波器，其中频率分量具有 第一或第二范围内的线间位移。 还提供了一个相间中性滤波器，用于以不同于第一频率的第二频率从AC功率去除第二选定的AC分量，其中第二频率分量在第一和第二频率之外具有线间相位偏移 范围。

公开(公告)号：US06462429B1

公开(公告)日：2002-10-08

申请号：US09512163

申请日：2000-02-24

申请人： John Dhyanchand ,  Donald G. Fair ,  Chai-Nam Ng

发明人： John Dhyanchand ,  Donald G. Fair ,  Chai-Nam Ng

IPC分类号： F02N1104

CPC分类号： H02K17/42 ,  F02N11/04 ,  H02K11/048

摘要： A generator/starter system for starting an engine and for tapping power from the engine in order to generate electricity includes a squirrel cage rotor, a main stator winding, an auxiliary stator winding, and an excitation source. The main stator winding is magnetically coupled to the squirrel cage rotor so as to provide an AC output in response to rotation of the squirrel cage rotor and so as to rotate the squirrel cage rotor in response to an AC input. The auxiliary stator winding is magnetically coupled to the squirrel cage rotor so as to provide excitation current when the main stator winding is providing the AC output. The source of excitation current is coupled to the auxiliary stator winding.

公开(公告)号：US5495403A

公开(公告)日：1996-02-27

申请号：US363136

申请日：1994-12-24

申请人： John Dhyanchand ,  Chai-Nam Ng ,  Vietson Nguyen ,  Richard Arbanella

发明人： John Dhyanchand ,  Chai-Nam Ng ,  Vietson Nguyen ,  Richard Arbanella

IPC分类号： H02M7/48 ,  H02M1/12

CPC分类号： H02M7/483 ,  H02M5/10

摘要： A summing transformer includes first and second sets of primary windings and first and second sets of secondary windings. The primary windings of the first set are connected in a wye configuration whereas the windings of the second set are connected in a delta configuration and the sets of primary windings are connected to form a wye-delta configuration having terminals coupled to the outputs of an inverter bridge. Each winding of the first set of secondary windings is interconnected with a winding of the second set of secondary windings. Circuitry is provided for operating the inverter bridge such that a stepped phase output waveform is produced at each of a plurality of phase outputs.

摘要翻译： 一个求和变压器包括第一和第二组初级绕组和第一和第二组次级绕组。 第一组的初级绕组连接成一个叶状配置，而第二组的绕组以三角形配置连接，并且初级绕组组被连接以形成具有耦合到反相器的输出的端子的叶形三角形结构 桥。 第一组次级绕组的每个绕组与第二组次级绕组的绕组互连。 提供了用于操作逆变器桥的电路，使得在多个相输出中的每一个产生阶梯相输出波形。

公开(公告)号：US4973902A

公开(公告)日：1990-11-27

申请号：US448251

申请日：1989-12-11

申请人： John Dhyanchand ,  Vietson Nguyen

发明人： John Dhyanchand ,  Vietson Nguyen

IPC分类号： H02H7/06

CPC分类号： H02H7/06

摘要： A variable speed, constant frequency aircraft power system uses current sensing diodes to rectify the power generator output. The current flow through pairs of diodes is compared to generate phase currents to detect feeder faults.

摘要翻译： 变速恒频飞机电力系统使用电流感应二极管来整流发电机输出。 将通过成对的二极管的电流进行比较以产生相电流以检测馈线故障。

公开(公告)号：US4542440A

公开(公告)日：1985-09-17

申请号：US548141

申请日：1983-11-02

申请人： P. R. K. Chetty ,  John Dhyanchand ,  Pierre Thollot

发明人： P. R. K. Chetty ,  John Dhyanchand ,  Pierre Thollot

IPC分类号： H02H7/12 ,  H02M3/28 ,  H02M3/337

CPC分类号： H02M3/3378

摘要： A push-pull converter has transistor power switches which conduct alternately to connect a DC source with the primary windings of an output transformer. A turn-off snubber circuit is connected with each power switch. When a power switch is turned on, snubber current pulses flow in the circuits connected with both switches. A switch current sensor circuit has a current transformer with an output winding inductively coupled with each of the conductors connected between the power switches and the primary windings of the output transformer. The snubber current pulses through the conductors are 180.degree. out of phase and are suppressed in the current transformer output. The switch current signal from the secondary of the current transformer is free of snubber current pulses and is used in a flux balance circuit and in a pulse-by-pulse current limiter.

摘要翻译： 推挽转换器具有晶体管功率开关，其交替地导通以将DC源与输出变压器的初级绕组连接。 关闭缓冲电路与每个电源开关连接。 当电源开关打开时，缓冲电流脉冲在与两个开关连接的电路中流动。 开关电流传感器电路具有电流互感器，其输出绕组与连接在功率开关和输出变压器的初级绕组之间的每个导体感应耦合。 通过导体的缓冲电流脉冲相位为180°，并在电流互感器输出中被抑制。 来自电流互感器的次级的开关电流信号没有缓冲电流脉冲，并且用于通量平衡电路和逐脉冲电流限制器。