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- W2059867609 abstract "Conventional thyristor-based load commutated inverter (LCI)-fed wound field synchronous machine operates only above a minimum speed that is necessary to develop enough back emf to ensure commutation. The drive is started and brought up to a speed of around 10–15% by a complex ‘dc link current pulsing’ technique. During this process, the drive have problems such as pulsating torque, insufficient average starting torque, longer starting time, etc. In this regard a simple starting and low-speed operation scheme, by employing an auxiliary low-power voltage source inverter (VSI) between the LCI and the machine terminals, is presented in this study. The drive is started and brought up to a low speed of around 15% using the VSI alone with field oriented control. The complete control is then smoothly and dynamically transferred to the conventional LCI control. After the control transfer, the VSI is turned off and physically disconnected from the main circuit. The advantages of this scheme are smooth starting, complete control of torque and flux at starting and low speeds, less starting time, stable operation, etc. The voltage rating of the required VSI is very low of the order of 10–15%, whereas the current rating is dependent on the starting torque requirement of the load. The experimental results from a 15.8 hp LCI-fed wound field synchronous machine are given to demonstrate the scheme." @default.
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- W2059867609 date "2011-01-01" @default.
- W2059867609 modified "2023-10-18" @default.
- W2059867609 title "Starting scheme for load commutated inverter-fed wound field synchronous machine using an auxiliary low-power voltage source inverter" @default.
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- W2059867609 doi "https://doi.org/10.1049/iet-epa.2010.0122" @default.
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