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1. 发明申请

WO2005027332A1 POWER REGULATOR FOR POWER INVERTER 审中-公开
标题翻译：电力逆变器功率调节器
公开(公告)号：WO2005027332A1
公开(公告)日：2005-03-24
申请号：PCT/US2004/029303
申请日：2004-09-09
申请人： SQUARE D COMPANY
发明人： COLBY, Roy, Stephen , KOCHER, Mark, John , CARSON, Gerald, Benjamin
IPC分类号： H02M7/537
CPC分类号： H02M7/53803 , H02J3/1835 , H02J3/48 , H02J2003/388 , Y02E40/30 , Y10T307/406 , Y10T307/544 , Y10T307/735
摘要： A power inverter includes a regulator circuit that controls real and reactive power output by the inverter. The regulator measures real and reactive output power by calculating x-phasor components of the inverter's voltage and current output waveforms. Phasor calculation can be adapted for one or more pairs of single-phase voltages and currents. Determining the fundamental in-phase and quadrature components of output voltage and current reduces computational complexity by permitting the regulator to perform its power control processing largely in a dc signal domain, and enables separate real and reactive power control. The power inverter can include islanding detection logic, which exploits the ability to separately control reactive power. Exemplary islanding detection logic is based on determining whether changing the amount of reactive power output by the inverter induces an output frequency shift.
摘要翻译：电力逆变器包括调节器电路，其控制由逆变器输出的实际和无功功率。调节器通过计算逆变器电压和电流输出波形的x相量分量来测量实际和无功输出功率。相量计算可以适用于一对或多对单相电压和电流。确定输出电压和电流的基本同相和正交分量通过允许调节器在大直径信号域中执行其功率控制处理来降低计算复杂度，并且实现单独的有功和无功功率控制。功率逆变器可以包括孤岛检测逻辑，其利用单独控制无功功率的能力。示例性孤岛检测逻辑基于确定是否改变由逆变器输出的无功功率的量引起输出频移。

2. 发明申请

WO2006121694A3 ELECTRONIC OVERLOAD RELAY FOR MAINS-FED INDUCTION MOTORS 审中-公开
公开(公告)号：WO2006121694A3
公开(公告)日：2006-11-16
申请号：PCT/US2006/016749
申请日：2006-05-01
申请人： SQUARE D COMPANY , GAO, Zhi , HABETLER, Thomas, G. , HARLEY, Ronald, G. , COLBY, Roy, Stephen
发明人： GAO, Zhi , HABETLER, Thomas, G. , HARLEY, Ronald, G. , COLBY, Roy, Stephen
IPC分类号： H02H6/00 , G01R31/34
摘要： An induction motor having a rotor and a stator is protected during running overloads by connecting the motor to an overload protection relay that can be tripped to interrupt power to the motor in the event of an overload, tracking the stator winding temperature of the motor during running overloads with a hybrid thermal model by online adjustment in the hybrid thermal model, and tripping the overload protection relay in response to a predetermined running overload condition represented by the tracked stator winding temperature. In one embodiment of the invention, the stator winding temperature is tracked by use of an online hybrid thermal model that uses the resistance of the rotor as an indicator of rotor temperature and thus of the thermal operating conditions of the motor. The hybrid thermal model incorporates rotor losses and heat transfer between the rotor and the stator, and approximates the thermal characteristics of the rotor and stator.

3. 发明申请

WO2005067120A1 METHOD AND APPARATUS FOR POWER INVERTER SYNCHRONIZATION 审中-公开
标题翻译：电力逆变器同步的方法和装置
公开(公告)号：WO2005067120A1
公开(公告)日：2005-07-21
申请号：PCT/US2004/040997
申请日：2004-12-08
申请人： SQUARE D COMPANY
发明人： COLBY, Roy, Stephen , KOCHER, Mark, John , CARSON, Gerald, Benjamin
IPC分类号： H02J3/38
CPC分类号： H02J3/42 , H02M7/53832 , H02M7/5395 , H02M2001/0012 , Y10T307/313 , Y10T307/406 , Y10T307/544
摘要： A control circuit synchronizes an ac power inverter to the mains voltage of an electrical grid by matching the fundamental phasor components of the inverter’s output voltage to the fundamental phasor components of the mains voltage. Once such matching meets an acceptable voltage error threshold, the control circuit initiates contactor closure, verifies contactor closure, and then initiates a changeover from voltage-mode control used in synchronization operations to a current-mode control of the inverter’s output. The control circuit provides corresponding disconnection control when disconnection from the grid is desired, wherein the regulated power of the inverter is ramped down in controlled fashion until it reaches a lower threshold whereupon contactor opening is initiated. Once contactor opening is verified, regulation control reverts to stand-alone voltage mode control or to shut down, as needed or desired.
摘要翻译：控制电路通过将逆变器的输出电压的基本相量分量与电源电压的基本相量分量相匹配来将交流功率逆变器与电网的电源电压同步。一旦这种匹配满足可接受的电压误差阈值，控制电路启动接触器闭合，验证接触器闭合，然后启动从同步操作中使用的电压模式控制切换到变频器输出的电流模式控制。当期望从电网断开时，控制电路提供对应的断开控制，其中逆变器的调节功率以受控的方式下降，直到其达到较低的阈值，从而开启接触器的开启。一旦验证接触器打开，调节控制就会根据需要或需要恢复到独立的电压模式控制或关闭。

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