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    • 68. 发明申请
    • Closed Loop Control of a Cyclo-Converter
    • 环形转换器的闭环控制
    • US20130194844A1
    • 2013-08-01
    • US13805427
    • 2011-06-15
    • Michael John HarrisonKevin LeeTomasz KotulaYakov Familiant
    • Michael John HarrisonKevin LeeTomasz KotulaYakov Familiant
    • H02M7/72
    • H02M7/72H02M1/4258H02M5/271Y02B70/126
    • A three-phase resonant cyclo-converter including a closed loop control module for controlling the switching frequency of the cyclo-converter, the closed loop control module including: a voltage signal development module arranged to develop a voltage signal representative of a voltage output waveform of the cyclo-converter, a storage module arranged to accumulate voltage signal values for phase portions of the voltage output waveform, where the voltage signal values are based on a voltage error signal and accumulated historical voltage signal values for the same corresponding phase portions, and a switching frequency control module arranged to develop a switching frequency control signal to control the switching frequency of the cyclo-converter based on the accumulated voltage signal values for corresponding phase portions of the voltage output waveform, and a proportional voltage signal based on a difference between the developed voltage signal and a reference voltage signal.
    • 一种三相谐振循环转换器,包括一个用于控制该循环转换器的开关频率的闭环控制模块,该闭环控制模块包括:一个电压信号开发模块,用于产生一个代表电压输出波形的电压信号 循环转换器,存储模块,其被布置成对电压输出波形的相位部分累积电压信号值,其中电压信号值基于电压误差信号和相同对应相位部分的累积历史电压信号值,以及 开关频率控制模块,其被布置成基于所述电压输出波形的相应相位部分的累积电压信号值来开发开关频率控制信号以控制所述循环转换器的开关频率;以及基于所述电压输出波形之间的差的比例电压信号 开发出电压信号和参考电压信号。
    • 69. 发明申请
    • SYSTEM AND METHOD FOR DETECTING PHASE LOSS AND DIAGNOSING DC LINK CAPACITOR HEALTH IN AN ADJUSTABLE SPEED DRIVE
    • 用于检测相位损失和诊断直流链路电容器健康在可调节速度驱动器中的系统和方法
    • US20130155729A1
    • 2013-06-20
    • US13326886
    • 2011-12-15
    • Kevin Lee
    • Kevin Lee
    • H02M5/458
    • H02P23/12G01R31/028G01R31/42H02P29/0241H02P29/032
    • A system and method for detecting input phase loss in an adjustable speed drive (ASD) includes an input unit to detect operating data from the ASD. The operating data includes a DC link current of the ASD. The system also includes a state observer that is adapted to receive the operating data from the input unit and extract a DC link capacitor current of the ASD using the DC link current. The system also includes a controller programmed to compare the extracted DC link capacitor current to a predetermined fault range and generate a fault indication of an input phase loss if the extracted DC link capacitor current is within the predefined fault range. The controller is also programmed to calculate an estimated lifespan of the DC link capacitor based on the extracted DC link capacitor current.
    • 用于检测可调速驱动器(ASD)中的输入相位损耗的系统和方法包括用于检测来自ASD的操作数据的输入单元。 操作数据包括ASD的直流链路电流。 该系统还包括状态观察器,其适于从输入单元接收操作数据,并使用DC链路电流提取ASD的DC链路电容器电流。 该系统还包括被编程为将所提取的DC链路电容器电流与预定故障范围进行比较的控制器,并且如果提取的DC链路电容器电流在预定义的故障范围内,则产生输入相位损失的故障指示。 控制器还被编程为基于所提取的DC链路电容器电流来计算DC链路电容器的估计寿命。