Abstract
In the drives of high-speed devices, such as a blood centrifuge, dynamic states also play an important role in terms of the time and quality of the tests performed. The article presents the application of modified equations resulting from the mathematical model of an induction motor to model dynamic phenomena during motor start-up, both with mains supply and with frequency start-up. The applied solution considers the phenomenon of current displacement in the rotor bar and the phenomenon of saturation. The comparison of the obtained results with the experiment shows that the method is sufficiently accurate. The obtained results can also be extended to higher power machines and to modeling other dynamic states.
Highlights
The presented model has been implemented in the own DYNF program, enabling determination of dynamic waveforms of an induction motor both when powered from the the determination of dynamic waveforms of an induction motor both when powered from mains and an inverter
Comparing the simulation results with the measurement shows that the proposed model allows for high simulation accuracy for dynamic states both for the direct start-up at the mains frequency and for the frequency start-up
The developed model can be successfully used to model other dynamic states, such as free coasting, reclosing, switching the number of pole pairs, voltage fluctuations and short-circuiting at the motor terminals, reversing, braking by counter-connection or dynamic, both in low and higher power motors. It enables the improvement of the motor design for static operating states and dynamic states
Summary
The article aimed to simulate the dynamic waveforms during the frequency start-up of the induction motor to drive the plasma centrifuge using the circuit model and analyze the influence of the frequency converter control parameters on the start-up dynamics. For this purpose, a mathematical model expressed in a rectangular coordinate system located on a complex plane was used, considering non-linear phenomena occurring in the motor, such as the phenomenon of saturation of the magnetic flux circuit and current displacement in the rotor bar. The presented considerations can be used to study the dynamic states of induction machines in other applications, for example, in electric vehicles
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
