This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Open AccessArticle
Control Range and Power Efficiency of Multiphase Cage Induction Generators Operating Alone at a Varying Speed on a Direct Current Load
by
Piotr Drozdowski
Piotr Drozdowski
Faculty of Electrical and Computer Engineering, Cracow University of Technology, Warszawska 24 Str., 31-155 Cracow, Poland
Energies 2025, 18(15), 4108; https://doi.org/10.3390/en18154108 (registering DOI)
Submission received: 29 June 2025
/
Revised: 26 July 2025
/
Accepted: 30 July 2025
/
Published: 2 August 2025
Abstract
The aim of the article is to determine the control range of a multiphase squirrel cage induction generator with more than three stator phases, operating in a wide range of driving speeds. The generator produces an output DC voltage using a multiphase converter operating as a PWM rectifier. The entire speed range is divided into intervals in which the sequence of stator phase voltages and, in effect, the number of pole pairs, is changed. In each interval, the output voltage is regulated by the frequency and amplitude of the stator voltages causing the highest possible power efficiency of the generator. The system can be scalar controlled or regulated using field orientation. Generator characteristics are calculated based on the set of steady-state equations derived from differential equations describing the multiphase induction machine. The calculation results are compared with simulations and with the steady-state measurement of the vector-controlled nine-phase generator. Recognizing the reliability of the obtained results, calculations are performed for a twelve-phase generator, obtaining satisfactory efficiency from 70% to 85% in the generator speed range from 0.2 to 1.0 of the assumed reference speed of 314 rad/s. The generator producing DC voltage can charge an electrical energy storage system or can be used directly to provide electrical power. This solution is not patented.
Share and Cite
MDPI and ACS Style
Drozdowski, P.
Control Range and Power Efficiency of Multiphase Cage Induction Generators Operating Alone at a Varying Speed on a Direct Current Load. Energies 2025, 18, 4108.
https://doi.org/10.3390/en18154108
AMA Style
Drozdowski P.
Control Range and Power Efficiency of Multiphase Cage Induction Generators Operating Alone at a Varying Speed on a Direct Current Load. Energies. 2025; 18(15):4108.
https://doi.org/10.3390/en18154108
Chicago/Turabian Style
Drozdowski, Piotr.
2025. "Control Range and Power Efficiency of Multiphase Cage Induction Generators Operating Alone at a Varying Speed on a Direct Current Load" Energies 18, no. 15: 4108.
https://doi.org/10.3390/en18154108
APA Style
Drozdowski, P.
(2025). Control Range and Power Efficiency of Multiphase Cage Induction Generators Operating Alone at a Varying Speed on a Direct Current Load. Energies, 18(15), 4108.
https://doi.org/10.3390/en18154108
Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details
here.
Article Metrics
Article metric data becomes available approximately 24 hours after publication online.