THEORETICAL COMPARISON OF MOTIONAL AND TRANSFORMER EMF DEVICE DAMPING EFFICIENCY
✍ Scribed by K.E. GRAVES; D. TONCICH; P.G. IOVENITTI
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 284 KB
- Volume
- 233
- Category
- Article
- ISSN
- 0022-460X
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✦ Synopsis
In this paper, theoretical comparison between electromagnetic dampers based on a &&motional emf '' and &&transformer emf '' design is presented. Transformer emf devices are based on the generation of emf in a stationary circuit, in which the emf is generated by a time-varying magnetic "eld linking the circuit. Motional emf devices are based on the generation of emf due to a moving conductor within a stationary magnetic "eld. Both of these designs can be used as damping elements for applications such as semi-active and regenerative vehicle suspension systems. The "ndings herein are provided so as to evaluate the most e$cient device for such applications. The analysis consists of comparing the damping coe$cient of the electromagnetic devices for a given magnetic "eld and given volume of conducting material. It has been found that for a limited range of dimensions, the transformer emf devices can be more then 1)2 times as e$cient as the motional emf devices. However, for most realistic situations, motional emf devices will have the highest e$ciency.