Abstract
The solution of the problem of connecting an asynchronous machine with a squirrel-cage rotor to a transistor converter after their disconnection in the absence of a rotor speed sensor is considered. This problem may arise in the drives of pumps, fans, in wind power plants and in other systems, if it is necessary to urgently breaking the mechanism or to ensure its uninterrupted operation. In the article, the problem is solved in relation to the ship's electric propulsion system. When the drive power is lost, the propeller and the rotor of the machine are first slowed down relatively quickly to a speed corresponding to the speed of the vessel. Then braking slows down due to the large inertia of the vessel. The significant duration of the process allows the use of an algorithm for determining the rotor speed, based on testing the machine by feeding the stator of an asynchronous motor from an inverter with low voltages with a frequency that varies within the specified limits. Mathematical and computer models of the system are constructed, numerical experiments are performed confirming the effectiveness of the considered solution.
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 callMore From: LETI Transactions on Electrical Engineering & Computer Science
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
