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Wybrane algorytmy regulacji napięcia zastosowane przy energooszczędnej pracy silników indukcyjnych

Zielińska M.J., Zieliński W.

Maszyny Elektryczne : zeszyty problemowe

2004

Nr 69

145-148

Economic efficiency of a driving system depends on rated energy indicators of a motor. The article considers energy-saving operation possibilities for an induction motor at feeding voltage control. Factors that can enhance energy indicators, such as current input to the motor, power factor and efficiency, have been given. Motor load can vary within a wide range depending on the kind of its operation. Energy indicators can be enhanced by applying varied voltage depending on the load rate. Therefore, simultaneous change of voltage and load makes the motor operate at higher values of energy indicators, which decide over energy consumption. At rated load a motor has to be fed with rated voltage, while decreasing load should be accompanied by an adequate voltage reduction. Minimal voltage is required at open-circuit operation condition. Voltage reduction brings about a decrease of voltage-dependent energy losses and an increase of power factor and efficiency, which leads to a reduced power input and consequently to saving of electrical energy. The article presents voltage control algorithms, which ensure maintaining energy indicators at an adequate predefined level. The indicators have been enhanced and energy savings have been calculated for various algorithms of voltage control.

Zagadnienia mocy biernej przy pracy energooszczędnej silnika indukcyjnego

Krygier J.

Przegląd Elektrotechniczny

1999

nr 7-8

186-190