Pfingsten Partners has acquired Dynapower, AC and DC power supply manufacturer. The Burlington, VT-based company designs and manufactures power transformers, rectifiers and bidirectional inverters that convert electricity between AC and DC. Pfingsten will look to increase the company's market share in its power supply end markets and capitalize on an opportunity in smart grid energy storage adoption. Headquartered in Chicago, Pfingsten's four funds have acquired 88 manufacturing, distribution and business services companies since its first investment in 1991.