Invention Grant
- Patent Title: Method to balance the secondary winding current to improve the current control stability
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Application No.: US16988790Application Date: 2020-08-10
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Publication No.: US11381153B1Publication Date: 2022-07-05
- Inventor: Wei Xiong , Dane Sutherland
- Applicant: Universal Lighting Techologies, Inc.
- Applicant Address: US AL Madison
- Assignee: Universal Lighting Techologies, Inc.
- Current Assignee: Universal Lighting Techologies, Inc.
- Current Assignee Address: US AL Madison
- Agency: Patterson Intellectual Property Law, P.C.
- Main IPC: H02M1/14
- IPC: H02M1/14 ; H05B45/382 ; H05B45/35 ; H02M3/00 ; H02M3/335 ; H02M1/00

Abstract:
A power converter and method for improving the current control stability of power converter by balancing the secondary winding currents is provided herein. The power converter includes a primary circuit having switches controllably driven at an operating frequency to produce an AC output through a primary transformer winding, and a secondary circuit having first and second secondary windings having respective leakage inductances. The secondary circuit provides power at an output node based on a power transfer between the primary winding and the first and second secondary windings. At least one balance inductor is coupled in series with the first and second secondary windings, and configured to reduce a difference between the first leakage inductance and the second leakage inductance. The at least one balance inductor may further be configured to reduce a difference between first and second AC current peaks associated with the first and second secondary windings, respectively.
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