Design of flux-weakening space vector control algorithms for permanent magnet brushless DC machines on suitable synchronous reference frames

The design of space vector control (SVC) systems suitable for flux-weakening operation of permanent magnet brushless DC machines (PMBDCMs) is presented in this study. The proposed design approach enables overcoming the critical issues arising from the non-linearities of PMBDCM voltage and torque equ...

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Bibliographic Details
Published in:IET electrical systems in transportation Vol. 9; no. 4; pp. 215 - 225
Main Authors: Serpi, Alessandro, Porru, Mario, Fois, Giuseppe, Damiano, Alfonso
Format: Journal Article
Language:English
Published: The Institution of Engineering and Technology 01.12.2019
Subjects:
back‐emf
brushless DC motors
constant‐power speed range
control system synthesis
DC link
demagnetisation
demagnetising current components
electric potential
flux‐weakening space vector control algorithms
machine theory
machine vector control
magnetic flux
numerical analysis
numerical simulation
permanent magnet brushless DC machines
permanent magnet machines
PI control
PI regulator
PMBDCM constraint management
PMBDCM torque demand
PMBDCM voltage equation
Special Issue: Selected Papers from the 2017 and 2018 IEEE Vehicle Power and Propulsion Conference
SVC design
synchronous reference frames
torque
torque equations
torque ripple
trapezoidal shapes
voltage control
magnetic flux
back-emf
flux-weakening space vector control algorithms
synchronous reference frames
torque
DC link
PMBDCM voltage equation
PMBDCM torque demand
trapezoidal shapes
demagnetising current components
constant-power speed range
machine vector control
numerical analysis
torque ripple
numerical simulation
PI control
demagnetisation
PMBDCM constraint management
permanent magnet brushless DC machines
control system synthesis
electric potential
machine theory
SVC design
torque equations
permanent magnet machines
PI regulator
brushless DC motors
voltage control
ISSN:2042-9738, 2042-9746, 2042-9746
Online Access:Get full text
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Description
Summary:The design of space vector control (SVC) systems suitable for flux-weakening operation of permanent magnet brushless DC machines (PMBDCMs) is presented in this study. The proposed design approach enables overcoming the critical issues arising from the non-linearities of PMBDCM voltage and torque equations; these issues derive from the trapezoidal shapes of back-emfs and affect PMBDCM constraint management significantly. The SVCs presented in this study have been developed within two different synchronous reference frames, both of which enable distinguishing torque and demagnetising current components clearly. Therefore, reference torque current component is determined in accordance with PMBDCM torque demand, while reference demagnetising current component is computed through a voltage follower PI regulator, which processes the voltage deficit detected on the DC-link. In this regard, a novel synchronous reference frame is proposed in this study, which improves PMBDCM constraint management and results into a wider constant-power speed range, but at the cost of some torque ripple. The enhanced performances achievable by SVC approaches are highlighted by numerical simulations, which regard the comparison among the SVCs and an SVC with no flux-weakening capability, at different operating conditions.
ISSN:2042-9738
2042-9746
2042-9746
DOI:10.1049/iet-est.2018.5108