Novel Rotor Design of Wound Field Synchronous Motor for Torque Ripple Reduction in ISG System
- 14 Downloads
This paper describes a method to reduce the torque ripple for the Wound Field Synchronous Motor, which does not use a permanent magnet. When a WFSM is used in an Integrated Starter Generator system, it must have a higher power density than other automotive motors in order to satisfy the size constraints and required power. An increase in the power density creates a magnetic flux saturation in the rotor, and this soon becomes the cause of an increase in the torque ripple of motor. An increase in the torque ripple can degrade the Noise Vibration Harshness characteristics of automotive by creating vibration and noise in the engine start-up mode, in which the maximum torque is generated in an ISG system. This paper proposes a method of reducing the torque ripple via a design that uses a flux barrier model in the WFSM’s rotor. The Response Surface Method is used to optimize the flux barrier model, and Finite Element Method is used to to verify the torque ripple reduction.
Key WordsISG WFSM Flux barrier Torque ripple Response surface method Finite element method
Unable to display preview. Download preview PDF.
- Cai, W. (2004). Comparison and review of electric machines for integrated starter alternator applications. Proc. IEEE Int. Conf. Industrial Application Systems, Seattle, Washington, USA.Google Scholar
- Hayashi, S., Morikawa, M. and Murasaki, M. (2003). Tasks and provisions for motor generator designing. Denso Technical Review, 81, 115–119.Google Scholar
- Hendershot, J. R. and Miller, T. J. E. (2010). Design of Brushless Permanent Magnet Machine. 2nd edn. Motor Design Books LLC. Florida, USA.Google Scholar
- Hong, J. P. (2013). Trends of wound field synchronous motor development. Auto Journal, Korean Society of Automotive Engineers, 3510, 31–37.Google Scholar
- Kelly, J., Scanes, P. and Bloore, P. (2014). Specification and design of a switched reluctance 48 V belt integrated starter generator for mild hybrid passenger car applications. SAE Paper No. 2014-01-1890.Google Scholar
- Murata, Y. and Morimoto, S. (2001). Design and Control of IPMSM. Ohm Press. Tokyo, Japan.Google Scholar
- Rick, A. and Sisk, B. (2015). A simulation based analysis of 12 V and 48 V microhybrid systems across vehicle segements and drive cycles. SAE Paper No. 2015-01-1151.Google Scholar
- Shimizu, H., Okubo, T. and Abe, M. (2013). Development of an integrated electrified powertrain for a newly developed electric vehicle. SAE Paper No. 2013-01-1759.Google Scholar
- Umeda, A. and Mastumura, S. (2002). Development of a higher performance alternator. Denso Technical Review, 71, 56–62.Google Scholar