Patent Number: 6,297,975

Title: Generalized method of paralleling voltage amplifiers

Abstract: A generalized method for balancing paralleled power converters is disclosed wherein (N) power converters, generally voltage amplifiers, are parallel and have current sensors positioned so as to form a differencing equation for the circulating current, and use that difference current as feedback to the paralleled power converters to force the circulating current to zero. The current sensors are current transforming transducers, where (N-1) transducers are included and where the feedback from the (N-1) transducers is distributed to summing amplifiers, which according to their gain distribution, balances the power converters. The system also includes passive magnetic devices to facilitate current sharing, where the devices are generally inductors which are designed to store no magnetic energy when under balanced excitation.

Inventors: Stanley; Gerald R. (Osceola, IN)

Assignee: Crown Audio, Inc.

International Classification: H02M 7/48 (20060101); H02M 007/00 ()

Expiration Date: 10/02/2018