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| 2. |
- Petersson, Andreas, 1974, et al.
(författare)
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Comparison Between Stator-Flux and Grid-Flux-Oriented Rotor Current Control of Doubly-Fed Induction Generators
- 2004
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Ingår i: IEEE Power Electronics Specialists Conference. - 0275-9306. ; 1, s. 482-486
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Konferensbidrag (refereegranskat)abstract
- Grid-flux (or grid-voltage)-oriented rotor current control of the doubly-fed induction generator is investigated in this paper. It is shown that by using a grid-flux-oriented system, the stability and damping of the system is independent of the d component of the rotor current, in contrast to a stator-flux-oriented system. Also for the stator-flux-oriented system, a certain value of the d component of the rotor current causes the system to become unstable. Hence, with a grid-flux-oriented system it is possible to produce as much reactive power as desired from a stability point of view. The theoretical results are verified experimentally with good result.
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| 3. |
- Petersson, Andreas, 1974, et al.
(författare)
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Flicker Reduction of Stall-Controlled Wind Turbine Using Variable Rotor Resistance
- 2004
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Ingår i: Nordic Wind Energy Conference.
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Konferensbidrag (refereegranskat)abstract
- In this paper, a flicker reduction control for stall-controlled wind turbines with induction generators, using variable rotor resistance, is derived. The objective is to reduce torque fluctuations and flicker emission by using a variable rotor resistance. However, the rotor resistance can only be varied within a limited range. This puts a limit to the achievable reduction in flicker emission and torque fluctuation which is investigated in this paper.
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| 4. |
- Wallmark, Oskar, 1976, et al.
(författare)
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Loss Minimization of a PMSM Drive for a Hybrid Electric Vehicle
- 2004
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Ingår i: Proc. 11th International Power Electronics and Motion Control Conference. ; 6, s. 160-164
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Konferensbidrag (refereegranskat)abstract
- This paper considers minimization, by means of control, of losses in permanent-magnet synchronous motor (PMSM) drives in hybrid-electric vehicle (HEV) applications. A case study is presented to investigate the impact of loss minimization for an experimental PMSM drive, developed for propulsion in a series HEV. The case study shows that the additional inverter losses, due to the extra field weakening added, reduce the potential to minimize losses considerably.
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| 5. |
- Wallmark, Oskar, 1976, et al.
(författare)
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Sensorless control of PMSM drives for hybrid electric vehicles
- 2004
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Ingår i: Proc. IEEE Power Electronics Specialists Conference. - 0780383990 ; 1, s. 4017-4023
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Konferensbidrag (refereegranskat)abstract
- This paper considers the implementation of a speed and position estimator for a permanent-magnet synchronous machine in a hybrid-electric vehicle application. A modified variant of the estimator of phase-locked loop type, previously developed by Harnefors and Nee, is presented, in order to take into account effects of saliency and operation in the whole speed region. Furthermore, design rules for all parameter settings are given. Based on drive-cycle simulations, important operating points are chosen for evaluation, with good results, on an existing experimental setup.
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