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The paper describes the method for indirect determination of the torque, power and energy indices of an induction motor shaft. A developed research laboratory stand is presented. It enables load testing of an induction motor with a possibility of direct measuring the torque, speed, currents and voltages of the researched motor. The analysis of the experimental research of the method for indirect determination...
Operation of a variable-frequency electric drive with damages in power electric circuit of the motor stator results in asymmetry of the motor phase current charge, increase of heating losses in certain phases, occurrence of variable components of electromagnetic torque and consumed power. Such operation modes significantly influence both motor operation and frequency converter operation, as long operation...
A method for provision of operability of a variable-frequency electric drive with vector control in the presence of breakages in the induction motor stator power electric circuit is presented. Analysis of electromagnetic torque orthogonal components in an analytical form has revealed that the influence of breakages, causing induction motor stator circuits asymmetry, on the electric drive operating...
One of the reasons for deterioration of the efficiency of operation of a variable-frequency electric drive (VFED) with scalar control consists in occurrence of asymmetry of induction motor (IM) parameters. Apart from appearance of variable components of consumed power and electromagnetic torque, such asymmetry causes deterioration of operating mode of an autonomous voltage inverter (AVI). Assessment...
Operation of an induction motor with electric or magnetic asymmetry of stator windings results in uneven distribution of losses in copper across stator phases and appearance of variable components of electromagnetic torque and consumed power. Such operating modes considerably influence both operation of the motor and operation of the technological mechanism on the whole, as there appears continuous...
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