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A comparative study of synchronous current control schemes based on FCS-MPC and PI-PWM for a two-motor three-phase drive

A comparative study of synchronous current control schemes based on FCS-MPC and PI-PWM for a two-motor three-phase drive
A comparative study of synchronous current control schemes based on FCS-MPC and PI-PWM for a two-motor three-phase drive
A two-motor drive, supplied by a five-leg inverter, is considered in this paper. The independent control of machines with full dc-bus voltage utilization is typically achieved using an existing pulsewidth modulation (PWM) technique in conjunction with field-oriented control, based on PI current control. However, model predictive control (MPC), based on a finite number of control inputs [finite-control-set MPC (FCS-MPC)], does not utilize a pulsewidth modulator. This paper introduces three FCS-MPC schemes for synchronous current control in this drive system. The first scheme uses all of the available switching states. The second and third schemes are aimed at reducing the computational burden and utilize a reduced set of voltage vectors and a duty ratio partitioning principle, respectively. Steady-state and transient performances are analyzed and compared both against each other and with respect to the field-oriented control based on PI controllers and PWM. All analyses are experimental and use the same experimental rig and test conditions. Comparison of the predictive schemes leads to the conclusion that the first two schemes have the fastest transient response. The third scheme has a much smaller current ripple while achieving perfect control decoupling between the machines and is of low computational complexity. Nevertheless, at approximately the same switching loss, the PI-PWM control yields the lowest current ripple but with slower electrical transient response.
pi control, electric current control, invertors, machine control, machine vector control, motor drives, predictive control, transient response, fcs-mpc, pi current control, pi-pwm, computational complexity, dc-bus voltage utilization, fastest transient response, field-oriented control, finite-control-set mpc, five-leg inverter, model predictive control, pulsewidth modulation technique, synchronous current control scheme, two-motor three-phase drive, inverters, predictive models, radio frequency, rotors, stators, switches, vectors, multi-motor drives, reduced-switch-count inverters, vector control
0278-0046
3867-3878
Lim, C.S.
3c5571b0-a770-4808-b55f-fdc89b495fbe
Levi, E.
068c5db6-2328-46b5-aa66-92f6502375fc
Jones, M.
cf34ab48-f4e0-40d8-9ce5-8f3b9cfe236e
Rahim, N.A.
f18d145d-e792-43ab-8283-63d8802213a9
Hew, W.P.
a23d7286-140c-44cc-84fc-5e78a97dc062
Lim, C.S.
3c5571b0-a770-4808-b55f-fdc89b495fbe
Levi, E.
068c5db6-2328-46b5-aa66-92f6502375fc
Jones, M.
cf34ab48-f4e0-40d8-9ce5-8f3b9cfe236e
Rahim, N.A.
f18d145d-e792-43ab-8283-63d8802213a9
Hew, W.P.
a23d7286-140c-44cc-84fc-5e78a97dc062

Lim, C.S., Levi, E., Jones, M., Rahim, N.A. and Hew, W.P. (2014) A comparative study of synchronous current control schemes based on FCS-MPC and PI-PWM for a two-motor three-phase drive. IEEE Transactions on Industrial Electronics, 61 (8), 3867-3878. (doi:10.1109/TIE.2013.2286573).

Record type: Article

Abstract

A two-motor drive, supplied by a five-leg inverter, is considered in this paper. The independent control of machines with full dc-bus voltage utilization is typically achieved using an existing pulsewidth modulation (PWM) technique in conjunction with field-oriented control, based on PI current control. However, model predictive control (MPC), based on a finite number of control inputs [finite-control-set MPC (FCS-MPC)], does not utilize a pulsewidth modulator. This paper introduces three FCS-MPC schemes for synchronous current control in this drive system. The first scheme uses all of the available switching states. The second and third schemes are aimed at reducing the computational burden and utilize a reduced set of voltage vectors and a duty ratio partitioning principle, respectively. Steady-state and transient performances are analyzed and compared both against each other and with respect to the field-oriented control based on PI controllers and PWM. All analyses are experimental and use the same experimental rig and test conditions. Comparison of the predictive schemes leads to the conclusion that the first two schemes have the fastest transient response. The third scheme has a much smaller current ripple while achieving perfect control decoupling between the machines and is of low computational complexity. Nevertheless, at approximately the same switching loss, the PI-PWM control yields the lowest current ripple but with slower electrical transient response.

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More information

Accepted/In Press date: 15 September 2013
e-pub ahead of print date: 21 October 2013
Published date: August 2014
Keywords: pi control, electric current control, invertors, machine control, machine vector control, motor drives, predictive control, transient response, fcs-mpc, pi current control, pi-pwm, computational complexity, dc-bus voltage utilization, fastest transient response, field-oriented control, finite-control-set mpc, five-leg inverter, model predictive control, pulsewidth modulation technique, synchronous current control scheme, two-motor three-phase drive, inverters, predictive models, radio frequency, rotors, stators, switches, vectors, multi-motor drives, reduced-switch-count inverters, vector control
Organisations: EEE

Identifiers

Local EPrints ID: 390574
URI: http://eprints.soton.ac.uk/id/eprint/390574
ISSN: 0278-0046
PURE UUID: 9c5cf3d9-8d8f-4aca-a69f-74b22d27bde8

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Date deposited: 05 Apr 2016 10:33
Last modified: 15 Jul 2019 20:39

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Contributors

Author: C.S. Lim
Author: E. Levi
Author: M. Jones
Author: N.A. Rahim
Author: W.P. Hew

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