Experience in developing sine-wave filter for power circuit of VVVF-drive with induction motor

Abstract

The relevance of the work reflects the increased use in domestic practice of variable frequency electric drive additional options, which include sine-wave filter; the demand for development of sine-wave filters based on domestic components. The main aim of the study: to develop guidelines for choosing the parameters of the sine-wave filters and the correct selection of the elements in the current; to consider the phenomena occurring when the capacity turn on to terminals of the load with induction motor, such as: reactive power compensation and overcompensation, self-excitation. The methods used in the study: test on a real process plant; computer simulation of an electromechanical system with a semiconductor converter based on a combination of circuit and operational principles for preparing the model. The results: the author describes some of the results of experience in the design and testing of the sine wave filter for high power VVVF-drive with high voltage induction motor with scalar control. The paper introduces the comparative results of the computer simulation of processes at different sets of the sine-wave filter and converter parameters. Some recommendations for sine-wave filter design are suggested.

Keywords

• frequency converter
• pulse width modulation of voltage
• sine wave filter
• induction motor
• capacitance
• reactive power