Title :
Analysis of parallel operation methods of PWM inverter sets for an ultra-high speed elevator
Author :
Yoshikawa, Toshifumi ; Inaba, Hiromi ; Mine, Toshisuke
Author_Institution :
Res. Lab., Hitachi Ltd., Japan
fDate :
6/22/1905 12:00:00 AM
Abstract :
Characteristics of some current control schemes that are for an inverter parallel set operation and easily implemented by microprocessor, are analyzed. To analyze an inverter parallel set system, equivalent circuits separated into two groups are derived. One group generates a motor current, the other generates a cross current flowing between inverters, and they are decoupling approximately. Thus, these circuits are utilized to comprehend the behavior of an inverter parallel set system. Applying these circuits, three current control schemes based on a suboscillation current control are analyzed and a control scheme, which can regulate both the motor current and the cross current, shows excellent performance
Keywords :
PWM invertors; electric current control; equivalent circuits; induction motor drives; lifts; machine control; PWM inverter sets; cross current generation; current control schemes; equivalent circuits; induction motor drives; inverter parallel set system; motor current generation; parallel operation methods; suboscillation current control; ultra-high speed elevator; Control systems; Current control; DC motors; Elevators; Equivalent circuits; Frequency; Insulated gate bipolar transistors; Microprocessors; Pulse width modulation inverters; Voltage;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2000. APEC 2000. Fifteenth Annual IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-5864-3
DOI :
10.1109/APEC.2000.822803
