An Enhanced Finite-Settling-Step Direct Torque and Flux Control (FSS-DTFC) for IPMSM Drives

Sehwan Kim; Jul-Ki Seok

An Enhanced Finite-Settling-Step Direct Torque and Flux Control (FSS-DTFC) for IPMSM Drives

Sehwan Kim

Jul-Ki Seok

Vol. 16, No. 4, pp. 1367-1374, Jul. 2016

10.6113/JPE.2016.16.4.1367

Discrete-time current limit (DTCL)

Finite-settling-step direct torque and flux control (FSS-DTFC)

Maximum inverter voltage utilization

Steady-state current limit (SSCL)

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Abstract

This paper presents a discrete-time version of voltage and current limited operation using an enhanced direct torque and flux control method for interior permanent magnet synchronous motor (IPMSM) drives. A command voltage vector for airgap torque and stator flux regulation can be uniquely determined by the finite-settling-step direct torque and flux control (FSS-DTFC) algorithm under physical constraints. The proposed command voltage vector trajectories can be developed to achieve the maximum inverter voltage utilization for the discrete-time current limit (DTCL)-based FSS-DTFC. The algorithm can produce adequate results over a number of the potential secondary upsets found in the steady-state current limit (SSCL)-based DTFC. The fast changes in the torque and stator flux linkage improve the dynamic responses significantly over a wide constant-power operating region. The control strategy was evaluated on a 900W IPMSM in both simulations and experiments.

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Cite this article

[IEEE Style]

S. Kim and J. Seok, "An Enhanced Finite-Settling-Step Direct Torque and Flux Control (FSS-DTFC) for IPMSM Drives," Journal of Power Electronics, vol. 16, no. 4, pp. 1367-1374, 2016. DOI: 10.6113/JPE.2016.16.4.1367.

[ACM Style]

Sehwan Kim and Jul-Ki Seok. 2016. An Enhanced Finite-Settling-Step Direct Torque and Flux Control (FSS-DTFC) for IPMSM Drives. Journal of Power Electronics, 16, 4, (2016), 1367-1374. DOI: 10.6113/JPE.2016.16.4.1367.