DocumentCode :
1910576
Title :
Controlled AC drives with ride-through capability at power interruption
Author :
Holtz, Joachim ; Lotzkat, Wolfgang
Author_Institution :
Wuppertal Univ., Germany
fYear :
1993
fDate :
2-8 Oct 1993
Firstpage :
629
Abstract :
General-purpose PWM (pulse width modulated) inverter drives are equipped with an undervoltage protection mechanism, causing the system to shut down within a few milliseconds after a power interruption in the mains. This may entail loss or damage of material in such critical applications as the production of textile fibers on paper, or with extruder drives. The proposed solution to this problem is to recover some of the mechanical energy stored in the rotating masses. When a power interruption occurs, a sequence of fast feedforwarded commands is applied to force an immediate transition into the regeneration mode. During the interrupt interval, the drive system continues to operate at almost zero torque, just regenerating a minor amount of power to cover the electrical losses in the inverter. The method is implemented in an additional software package to be used with general-purpose inverter drives of limited dynamic performance. Experimental results are presented
Keywords :
AC motors; electric drives; invertors; machine control; pulse width modulation; PWM inverter drives; controlled AC drives; electrical losses; fast feedforwarded commands; interrupt interval; power interruption; regeneration mode; ride-through capability; software package; stored energy recovery; undervoltage protection mechanism; Acceleration; Control systems; DC motors; Power supplies; Power system stability; Production; Pulse width modulation; Pulse width modulation inverters; Torque; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industry Applications Society Annual Meeting, 1993., Conference Record of the 1993 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-1462-X
Type :
conf
DOI :
10.1109/IAS.1993.298885
Filename :
298885
Link To Document :
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