A new approach for speed control of a d.c. motor fed from ac to dc sepic converter

Ahmed, Mohamed Mostafa Ramadan, Putrus, Ghanim and Shokralla, S. (2005) A new approach for speed control of a d.c. motor fed from ac to dc sepic converter. In: Electricity Distribution, 2005. CIRED 2005. 18th International Conference and Exhibition on. IEEE, Piscataway, NJ, pp. 103-107.

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A complete modelling and numerical simulation of a system comprising a separately excited d.c. motor fed from a single-phase, single-way rectifier are presented in this paper. The strategy of this approach is based on the cascade combination of a diode bridge rectifier and a Sepic (single-ended primary inductance converter) circuit. Both step-up and step-down characteristics of the output voltage can be obtained. The supply current is approximately sinusoidal and its power factor is high. A good performance is achieved with a simple control circuit and only one switch for the converter. Differential equations describing the system behaviour in different modes of operations are presented. Solving these equations enable the predication of the motor performance in both transient and stead-state conditions. The total harmonic distortion of the supply and motor currents are obtained using the numerical simulation of this system. Moreover, the effect of the duty ratio of the converter on the system performance is investigated. The experimental and simulation results confirm the theoretical analysis. The proposed configuration provides a useful rectifier with sinusoidal input current and a satisfactory motor speed regulation.

Item Type: Book Section
Uncontrolled Keywords: ac-dc convener and Sepic converter, dc motor, power electronics, rectifier
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 03 Feb 2015 09:54
Last Modified: 12 Oct 2019 19:06
URI: http://nrl.northumbria.ac.uk/id/eprint/19871

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