公开(公告)号：US4935859A

公开(公告)日：1990-06-19

申请号：US421451

申请日：1989-10-13

申请人： Maurice A. Kirchberg ,  Alexander Cook

发明人： Maurice A. Kirchberg ,  Alexander Cook

IPC分类号： H02M5/27

CPC分类号： H02M5/272

摘要： This invention relates to a VSCF system for aircraft power generation having a DC source, the DC source producing a substantially constant voltage DC signal. An inverter is coupled to the DC source and receives the DC signal, applying a PWM pattern of switching transients to the DC signal to produce an AC signal from the DC signal. The subject invention contemplates the addition of a feedback circuit which comprises a transformer providing an inductive coupling between the AC signal at a point of regulation and the DC signal at a point between the DC source and the inverter to eliminate short duration switching transients in the PWM pattern. Modulation of the DC signal allows short duration switching transients in the PWM pattern to be lengthened, thereby avoiding physical minimum time switching limitations in the switches of the inverter. Feedback of the AC signal allows inverter frequency to be changed while maintaining synchronization between the DC signal modulation and PWM pattern fed to the inverter.

摘要翻译： 本发明涉及一种用于飞机发电的VSCF系统，其具有DC源，DC源产生基本恒定的电压DC信号。 反相器耦合到DC源并接收DC信号，将开关瞬变的PWM模式应用于DC信号以产生来自DC信号的AC信号。 本发明考虑了添加反馈电路，该反馈电路包括在调节点处的AC信号和DC源和逆变器之间的点处的DC信号之间提供电感耦合的变压器，以消除PWM中的短时间开关瞬变 模式。 直流信号的调制允许PWM模式中的短时间切换瞬变被延长，从而避免逆变器开关中的物理最小时间切换限制。 交流信号的反馈允许变频器频率同时保持直流信号调制与馈送到逆变器的PWM模式之间的同步。

公开(公告)号：US5343379A

公开(公告)日：1994-08-30

申请号：US973120

申请日：1992-11-06

申请人： Maurice A. Kirchberg ,  Alexander Cook

发明人： Maurice A. Kirchberg ,  Alexander Cook

IPC分类号： H02M7/5387 ,  H02M1/08 ,  H02M1/12

CPC分类号： H02M7/53875 ,  H02M2001/385

摘要： A method of modeling a response of an inverter having a pair of switches which are alternately operated to alternately connect first and second voltages to an inverter output to develop an inverter output voltage includes the steps of assuming the inverter output voltage is substantially at or between the first and second voltages during a dwell interval and modeling the inverter response based upon such assumption. The modeling may be used as part of a control strategy for an inverter wherein output harmonic content is minimized.

摘要翻译： 对具有交替操作以交替地将第一和第二电压交替地连接到逆变器输出以产生逆变器输出电压的一对开关的逆变器的响应建模方法包括以下步骤：假设逆变器输出电压基本上在 在停留间隔期间的第一和第二电压以及基于这样的假设建模逆变器响应。 该建模可以用作其中输出谐波含量最小化的逆变器的控制策略的一部分。

公开(公告)号：US4935860A

公开(公告)日：1990-06-19

申请号：US421222

申请日：1989-10-13

申请人： Maurice A. Kirchberg ,  Alexander Cook

发明人： Maurice A. Kirchberg ,  Alexander Cook

IPC分类号： H02M5/27

CPC分类号： H02M5/272

摘要： This invention relates to a VSCF system for aircraft power generation having a DC source, the DC source producing a substantially constant voltage DC signal. An inverter is coupled to the DC source and receives the DC signal, applying a PWM pattern of switching transients to the DC signal to produce an AC signal from the DC signal. The subject invention contemplates the addition of a DC link modulator comprising a ripple generator which varies the voltage of the DC signal to eliminate short duration switching transients in the PWM pattern. Variation of the DC signal allows short duration switching transients in the PWM pattern to be lengthened, thereby avoiding physical minimum time switching limitations in the switches of the inverter. In the preferred embodiment of the invention, an inverter controller provides a synchronizing signal to the ripple generator, which is coupled to a point between the DC source and the inverter.

摘要翻译： 本发明涉及一种用于飞机发电的VSCF系统，其具有DC源，DC源产生基本恒定的电压DC信号。 反相器耦合到DC源并接收DC信号，将开关瞬变的PWM模式应用于DC信号以产生来自DC信号的AC信号。 本发明考虑添加一个DC链路调制器，其包括纹波发生器，其改变DC信号的电压以消除PWM模式中的短持续时间切换瞬变。 直流信号的变化允许PWM模式中的短时间切换瞬变被延长，从而避免逆变器开关中的物理最小时间切换限制。 在本发明的优选实施例中，逆变器控制器向波纹发生器提供同步信号，该脉动发生器耦合到DC源和逆变器之间的点。

公开(公告)号：US4937720A

公开(公告)日：1990-06-26

申请号：US421221

申请日：1989-10-13

申请人： Maurice A. Kirchberg

发明人： Maurice A. Kirchberg

IPC分类号： H02M5/27

CPC分类号： H02M5/272

摘要： This invention relates to a VSCF system for aircraft power generation having a DC source, the DC source producing a DC signal. An inverter is coupled to the DC source and produces a constant frequency AC signal from the DC signal. It is known that, in converting the DC signal to the AC signal, the inverter distorts the DC signal, producing harmonic content therein. Accordingly, an inverter controller is provided which analytically determines distortion of the DC signal due to inverter action and alters PWM patterns fed to the inverter to precompensate for harmonic content in the DC signal.

摘要翻译： 本发明涉及用于飞机发电的VSCF系统，其具有DC源，DC源产生DC信号。 反相器耦合到DC源，并从DC信号产生恒定频率的AC信号。 众所周知，在将直流信号转换为交流信号时，逆变器扭曲直流信号，产生谐波含量。 因此，提供了一种逆变器控制器，其分析地确定由于逆变器动作引起的DC信号的失真，并且改变馈送到逆变器的PWM模式以预补偿DC信号中的谐波含量。

公开(公告)号：US6134127A

公开(公告)日：2000-10-17

申请号：US252288

申请日：1994-05-18

申请人： Maurice A. Kirchberg

发明人： Maurice A. Kirchberg

IPC分类号： H02M1/12 ,  H02M7/5395

CPC分类号： H02M1/12 ,  H02M7/5395 ,  H02M2001/0012

摘要： The present invention measures the Fourier coefficients of each controlled harmonic in a signal beginning in a present cycle of the fundamental frequency with a switching angle corresponding to each controlled harmonic and predicts what these Fourier coefficients will be before the occurrence of a corresponding switching angle in a subsequent cycle. The present invention also predicts what these Fourier coefficients would be if the corresponding switching angle in the subsequent cycle is varied. Each switching angle is then varied in the subsequent cycle only if the associated harmonic would be improved thereby; otherwise, that switching angle in not varied in the subsequent cycle.

摘要翻译： 本发明测量以基频的当前周期开始的信号中的每个受控谐波的傅立叶系数，其中转换角对应于每个受控谐波，并且预测这些傅里叶系数将在 随后的周期。 本发明还预测如果随后的周期中的对应切换角度发生变化，这些傅里叶系数将是什么。 只有当相关联的谐波被改善时，每个切换角随后在随后的循环中变化; 否则，切换角度在随后的周期内不会变化。