Siemens Industry, Inc.

Siemens Energy & Automation, Inc.

Siemens Aktiengesellschaft

Ronald Gaillot

Mukul Rastogi

Xuan Zhang

John Channing Bousfield, Iii

Ralph Flaugher

Yusuke Fukuta

Anthony C Schneider

Jr Ralph Flaugher

A system and method for limiting input voltage to a power delivery system having regeneration capability. According to various embodiments, the system includes a regulator having a multiple input variables and at least one output variable; and an accumulator in communication with the regulator wherein the accumulator presets the output of the regulator to facilitate a quick output as well as accumulates error values related to the multiple input variables and facilitates a change by the regulator to the at least one output variable based upon the accumulated values.

System and method for limiting input voltage to a power delivery system having regeneration capability

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.

System and method for parallel control of variable frequency drives

Growing community of inventors

Lower Burrell, PA, United States of America

Ronald Gaillot