Invention Application
WO2007022164A2 SYSTEM AND METHOD FOR PARALLEL CONTROL OF VARIABLE FREQUENCY DRIVES 审中-公开
用于变频驱动器并行控制的系统和方法

SYSTEM AND METHOD FOR PARALLEL CONTROL OF VARIABLE FREQUENCY DRIVES
Abstract:
A method for controlling at least two variable frequency drives connected in parallel. The method comprises, for each variable frequency drive, communicating a magnetizing current component value to a master controller, and receiving a speed demand, a flux demand, and an average magnetizing current component value from the master controller. The method also comprises determining a motor speed and a motor flux based on measurements of a stator voltage and current of a motor coupled to the variable frequency drive, determining a speed reference based on a torque current component value, and determining a flux reference based on the magnetizing current component value and the average magnetizing current component value. The method further comprises adjusting a torque current component based on the speed reference and/or adjusting a magnetizing current component based on the flux reference.
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