公开(公告)号：US4905134A

公开(公告)日：1990-02-27

申请号：US291501

申请日：1988-12-29

申请人： Bradley J. Recker ,  Christopher J. Rozman ,  Derrick I. Roe

发明人： Bradley J. Recker ,  Christopher J. Rozman ,  Derrick I. Roe

IPC分类号： H02J3/38 ,  H02J3/46 ,  H02M5/27 ,  H02M5/44

CPC分类号： H02M5/272 ,  H02J3/46 ,  Y10T307/615 ,  Y10T307/625

摘要： Prior variable speed constant frequency (VSCF) system controls which operate the VSCF system while it is coupled in parallel with an external AC source across a load have controlled inverter output voltage based only upon the reactive current level supplied by the inverter. This has in turn resulted in the possibility of unstable system operation under load. In order to overcome the foregoing problem, a control for controlling the supply of power to a load from an inverter coupled in parallel with an AC power source across the load senses the real and reactive components of the current supplied by the inverter and the phase displacement of the power developed by the inverter relative to the power developed by the AC power source to derive an angular displacement signal. The frequency and phase of the inverter output are controlled in dependence upon the real current component supplied by the inverter and the angular displacement signal while the magnitude of the inverter output is controlled in dependence upon the real and reactive current components. The present control is capable of operating a VSCF inverter in a stable fashion under load.

摘要翻译： 在VSCF系统与负载外部的交流电源并联的情况下，运行VSCF系统的先前的变速恒定频率（VSCF）系统控制只能根据逆变器提供的无功电流来控制逆变器的输出电压。 这反过来也导致系统运行不稳定的可能性。 为了克服上述问题，用于控制来自与跨过负载的交流电源并联连接的逆变器的负载供电的控制感测由逆变器提供的电流的实际和无功分量以及相位移 由逆变器开发的功率相对于由AC电源产生的功率来导出角位移信号。 逆变器输出的频率和相位根据由逆变器提供的实际电流分量和角位移信号进行控制，同时根据实际和无功电流分量控制逆变器输出的幅度。 本控制能够以稳定的方式在负载下操作VSCF逆变器。

公开(公告)号：US4875149A

公开(公告)日：1989-10-17

申请号：US285118

申请日：1988-12-16

申请人： Christopher J. Rozman ,  Derrick I. Roe ,  Bradley J. Recker

发明人： Christopher J. Rozman ,  Derrick I. Roe ,  Bradley J. Recker

IPC分类号： H02J3/26 ,  H02J3/38 ,  H02M5/458

CPC分类号： H02M5/458

摘要： Polyphase inverters for converting AC power into polyphase AC output power typically experience phase shifts due to unbalanced phase loading. The resulting phase error is undesirable and should be eliminated, if possible. In order to overcome the foregoing problem, a control for maintaining N-1 phase outputs at desired angular displacements relative to a reference phase output determines the angular deviation of each of the N-1 phase outputs from the desired angular displacement for such phase output and adjusts a control waveform in time for each of a number of switches based upon the angular deviation of the phase output produced by such switch so that the angular deviations are minimized.

摘要翻译： 用于将交流电转换为多相交流输出功率的多相逆变器通常由于相位负载不平衡而经历相移。 如果可能，所得的相位误差是不期望的并且应当被消除。 为了克服上述问题，相对于参考相位输出在期望的角位移保持N-1相输出的控制确定了N-1相输出中的每一个与用于这种相位输出的期望角位移的角偏差， 基于由这种开关产生的相位输出的角偏差来调整多个开关中的每一个的控制波形，使得角度偏差最小化。