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WHITE PAPER Ultracapacitor Applications in the Power Electronic World

By Adri an S c hneu w l y , Gi anni Sartor elli, Jurge n Auer and Bobby Maher M a x w ell T e ch n o logies, In c.

Introd uction

There has been a lot of progress in contro l and motor design, d u e to the increasing pow e r deman d in elect r ic appl icat i o n s , as w e ll as on goin g pressu res for more en v i ron m en t a lly f r ien d l y an d high efficiency s o lutions. However, designers and engineers have not been su ccessful with regard to th e electric power storage systems. This is due primarily to the fact that batteries are used to provide the power peaks in most o f the currently deve lope d solu t i on s rely in g on a pow e r st orage system. The deficiencies of battery stor age systems are many and they create a variety of design challe nges for engineer s. Batteries have a poor low-temperature perf orman c e, a v e ry li mit e d l i f e t i me u n d er ex t r eme condit ion s - resu lt in g in repeat ed replacem ent throughout the lif e of the system - and they are not designed to satisfy the most important requirements of power sources: To pro v ide bursts of power in the secon d s range over many h und reds of thousands o f c y cles [ 1 ]. Today, ultracapacitors are availab l e from major production firms in the United States, Eur o pe, and Asia, and are availab l e in a variety of sizes and co nfigurations . Figure 1: Typical availa ble ultracapacit ors from Max w el l : PC10 wi th 10 F an d BCAP0010 with 2600 F
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