System and method for tuning transformers

Patent metadata

Field	Value
Publication number	US-10060962-B2
Application number	US-201514675541-A
Country	US
Kind code	B2
Filing date	Mar 31, 2015
Priority date	Mar 31, 2014
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

A system and method for tuning a transformer is provided. A transformer fixture may connect a switching network to a plurality of inductors of a transformer. At least one computing device may calculate a target number of turns for a primary coil and a secondary coil of the transformer based on a frequency response of the transformer. The switching network may connect the inductors of the transformer together in a pattern that results in the primary coil and secondary coil having the target number of turns.

First claim

The invention claimed is:

1. A method for tuning a transformer comprising:
instructing, by at least one computing device, an impedance analyzer to execute a frequency sweep of a transformer, the transformer including a first coil and a second coil;
determining, by the at least one computing device, a frequency value corresponding to a maximum impedance of the transformer observed during the frequency sweep;
in response to the frequency value being outside of a threshold frequency range, instructing, by the at least one computing device, a switching network coupled to the transformer to adjust a number of turns of the first coil of the transformer, the switching network being coupled to a fixture coupled to the transformer;
determining, by the at least one computing device, an impedance value of the transformer corresponding to a predetermined frequency;
in response to the impedance value being outside of a threshold impedance range, instructing, by the at least one computing device, the switching network to adjust a number of turns of the second coil of the transformer; and
determining, by the at least one computing device following a second frequency sweep by the impedance analyzer, a second impedance value of the transformer corresponding to the predetermined frequency, and instructing the switching network to adjust the number of turns on the second coil of the transformer in response to the second impedance value being outside of the threshold impedance range.

2. The method of claim 1 , wherein the impedance value is determined following the number of turns of the first coil of the transformer being adjusted by the switching network.

3. The method of claim 2 , further including instructing, by the at least one computing device following adjustment of the number of turns of the first coil by the switching network, the impedance analyzer to provide a signal to the transformer at the predetermined frequency and to monitor the impedance of the transformer at the predetermined frequency.

4. The method of claim 1 , wherein the instructing the switching network includes controlling the switching network to selectively open and close a plurality of electrical switches coupled to a plurality of inductors of the transformer to adjust the number of turns of the first and second coils.

5. The method of claim 1 , further including calculating, by the at least one computing device, a target number of turns of the first coil, and determining, by the at least one computing device, a connection pattern of a plurality of inductors of the first coil that identifies which inductors of the first coil to connect to at least one terminal of the transformer to achieve the target number of turns, wherein the instructing includes communicating switch commands to the switching network based on the connection pattern.

6. The method of claim 1 , wherein the first coil is a primary coil of the transformer and the second coil is a secondary coil of the transformer.

7. The method of claim 1 , wherein the threshold frequency range includes the predetermined frequency.

Assignees

• Us Navy
• Us Navy

Inventors

• Kure Josue
• Gomez Timothy
• Arvin Patrick

Classifications

• G01R31/62

  Testing of transformers · CPC title

• H01F27/42

  Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils (circuits for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output H02P13/00; impedance networks H03H) · CPC title

• G01R29/20 Primary

  Measuring number of turns; Measuring transformation ratio or coupling factor of windings · CPC title

• G01R23/00

  Arrangements for measuring frequencies; Arrangements for analysing frequency spectra · CPC title

• G01R27/02

  Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant (by measuring phase angle only G01R25/00) · CPC title