Gilbert Hock Beng Foo

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Interior permanent-magnet synchronous motors (IPMSMs) become attractive candidates in modern hybrid electric vehicles and industrial applications. Usually, to obtain good control performance, the electric drives of this kind of motor require one position, one dc link, and at least two current sensors. Failure of any of these sensors might lead to degraded(More)
The reliability of micro inverters is an important factor as it would be necessary to reduce cost and maintenance of the small and medium scale distributed PV power conversion systems. Electrolytic capacitors and active power decouple circuits can be avoided in micro inverters with the use of a medium voltage DC-link. Such a DC-link based micro inverter is(More)
This paper presents an improved direct torque controlled reluctance synchronous motor drive for field-weakening applications. The contribution of this paper is twofold. First, a modified direct torque control (DTC) algorithm is proposed to enable a constant switching frequency, reducing the torque ripples significantly while simultaneously retaining the(More)
This paper presents the modeling and position-sensorless vector control of a dual-airgap axial flux permanent magnet (AFPM) machine optimized for use in flywheel energy storage system (FESS) applications. The proposed AFPM machine has two sets of three-phase stator windings but requires only a single power converter to control both the electromagnetic(More)
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