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Electric Drive Based on an Open-End Winding Surface PM Synchronous Machine with a Floating Capacitor Bridge

Amerise, Albino; Rovere, Luca; Formentini, Andrea; Mengoni, Michele; Zarri, Luca; Zanchetta, Pericle


Albino Amerise

Luca Rovere

Andrea Formentini

Michele Mengoni

Luca Zarri


A speed control scheme is presented for a 3-phase surface permanent magnet synchronous machine with an openend stator winding fed by a three-phase inverter and a floating bridge inverter. The latter is used to compensate for the reactive power of the main inverter and to maximize the active power received by the motor, without exceeding the available stator current and DC-link voltage. To reduce the switching losses, the DC-link voltage of the floating inverter bridge varies depending on the operating condition of the motor and the controllability requirements of the system. The experimental results show that a significant improvement in the speed range at constant power is achievable, proportionally to the DC-link voltage of the floating bridge inverter.


Amerise, A., Rovere, L., Formentini, A., Mengoni, M., Zarri, L., & Zanchetta, P. (2020). Electric Drive Based on an Open-End Winding Surface PM Synchronous Machine with a Floating Capacitor Bridge. IEEE Transactions on Industry Applications, 56(3), 2709-2718.

Journal Article Type Article
Acceptance Date Feb 24, 2020
Online Publication Date Mar 2, 2020
Publication Date 2020-05
Deposit Date Mar 16, 2020
Publicly Available Date Mar 17, 2020
Journal IEEE Transactions on Industry Applications
Print ISSN 0093-9994
Electronic ISSN 1939-9367
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 56
Issue 3
Pages 2709-2718
Keywords permanent magnet machines, motor drives, AC motors, variable speed drives, pulse width modulation inverters, multilevel systems
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