Abstract
Issues of operating modes of 4A series asynchronous squirrel-cage motors and AI serried motors at asymmetrical supply voltage for different values of motor shaft load are considered on the basis of simulation using Matlab software package and Simulink package. In the simulation, currents in asynchronous motor phases were evaluated as a function of K2U, KZ, and based on these results, permissible operation parameters were evaluated for induction motors. The results obtained are the basis for technical solutions aimed at improving operational reliability of asynchronous motors, they will allow taking into account permissible operating parameters of asynchronous motors not only in the design, but also in operation in power supply systems of various facilities.
Highlights
Reliability is the most important technical and economic indicator of asynchronous motors (AM) quality which defines ability to operate reliably with unchangeable technical characteristics during a given period of time under certain operating conditions [1,2]
Voltage asymmetry has a negative impact on AM, reduces operational reliability and increases risk of motor failures
– value of the motor shaft load varied from 0 to 120 % with 20 % increments at different K2U values, load is reduced by 2 times at a voltage asymmetry of 4%
Summary
Reliability is the most important technical and economic indicator of asynchronous motors (AM) quality which defines ability to operate reliably with unchangeable technical characteristics during a given period of time under certain operating conditions [1,2]. In actual electric motor operation conditions, due to various factors, there is a significant deviation from normal operating modes. The vast majority of the reason for this is poor voltage quality in the networks, in particular, asymmetry of supply voltage. Voltage asymmetry has a negative impact on AM, reduces operational reliability and increases risk of motor failures. Service life of asynchronous motors operating under full
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