| 1. |
- Haghbin, Saeid, 1977, et al.
(författare)
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A Combined Motor/Drive/Battery Charger Based on a Split-Windings PMSM
- 2011
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Ingår i: 7th IEEE Vehicle Power and Propulsion Conference, VPPC 2011, Chicago, 6-9 September 2011. - 9781612842486
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Konferensbidrag (refereegranskat)abstract
- An integrated motor/drive/battery charger is proposed, designed and simulated for vehicles using grid power to charge the system batteries. The machine stator windings are re-configured by a relay-based switching device for charging to constitute a special grid connected generator. This rotary generator (machine with re-configured windings) provides an isolated three-phase power source for the inverter to make a three-phase boost battery charger. The system design and operation in the charging and traction modes are explained for the proposed integrated motor/drive/battery charger. The charging power is half of the traction power for the proposed system. Simulation results are provided to verify the proper operation for the proposed system.
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| 2. |
- Henriksson, Andreas, 1979, et al.
(författare)
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Simulating the EMI Characteristics of Step-Down DC/DC Converters
- 2011
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Ingår i: 7th IEEE Vehicle Power and Propulsion Conference, VPPC 2011, Chicago, 6-9 September 2011. - 9781612842486
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Konferensbidrag (refereegranskat)abstract
- This paper addresses a complete analysis of the EMI problems associated with step down DC/DC converters and evaluate the effectiveness of solutions that aim to minimize the conducted emissions. Different simulation model of diodes are analyzed and a full converter including PCB stray elements is implemented in Simplorer. To increase the accuracy and account for higher frequencies in the conducted emissions, the coupling between circuit elements in the input filter is taken into account. If the EMI performance of the simulation model is compared with measurements, both for synchronous and nonsynchronous rectification, it is concluded that the complete EMI signature can be simulated with satisfactory accuracy by a detailed model including stray elements and mutual couplings. Synchronous rectification can help to lower the conducted emission levels and a co-packaged Schottky diode in the low-sideswitch can decrease the emission levels even further by reducing the influence of the reverse recovery of the inherent body diode.
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| 3. |
- Javdani Erfani, Mehdi, 1982, et al.
(författare)
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Performance and Losses Analysis of Charging and Discharging Mode of a Bidirectional DC/DC Fullbridge Converter Using PWM Switching Pattern
- 2011
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Ingår i: 7th IEEE Vehicle Power and Propulsion Conference, VPPC 2011, Chicago, 6-9 September 2011. - 9781612842486
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Konferensbidrag (refereegranskat)abstract
- Bi-directional isolated on-board chargers are potential options in grid-connected vehicle applications in the future smart grid environment. For a two-stage bi-directional on-board charger consisting of an AC/DC converter and an isolated DC/DC converter, performance analysis has been conducted for the DC/DC stage. The DC/DC converter has full-bridge topology where the loss analysis has been done for different switching devices, transformer and inductor and for different operating points in both directions. A robust controller is designed for DC/DC converter to prevent the battery voltage overshoot. This DC/DC stage has a high efficiency figure, around 95%, in both battery charging and battery to the grid power transfer modes.
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| 4. |
- Nilsson, Tomas, 1983-, et al.
(författare)
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Optimized Engine Transients
- 2011
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Ingår i: Proceedings of the 7th IEEE vehicle power and propulsion conference. - : IEEE. - 9781612842486 ; , s. 1-6
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Konferensbidrag (refereegranskat)abstract
- Recent development has renewed the interest in drivetrain concepts which give a higher degree of freedom by disconnecting the engine and vehicle speeds. This freedom raises the demand for active control, which especially during transients is not trivial but of which the quality is crucial for the success of the drivetrain concept. This work attempts to analyze and explain the fuel optimal solution for the simplest drivetrain setup, which is an engine connected to a load which does not restrict the engine speed. This is made by using a Willan's model for the engine and deriving the fuel optimal solution during output power transients. The analysis is made with dynamic programming, Pontryagin's maximum principle and backward simulation under a static optimal line restriction. The analysis show that the optimal transients can be explained, visualized and, in simple cases, derived from phase planes of the engine speed and the Lagrange multiplier. In these cases the time needed for computation was reduced a factor >; 1000 compared to dynamic programming. Restricting the engine to the static optimal line turns out to be very close to optimal, even during highly transient operation, while reducing the time needed for computation a factor ≫ 1000.
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