Voltage-current phase-based method for linear and rotary transformer systems, and associated systems and methods
US11467003B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 2020 |
| Grant date | Oct 11, 2022 |
| Priority date | — |
| Expiry date | Apr 10, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F27/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A representative phase-shift based method for using a transformer system to detect movement of an object, and associated systems and methods are disclosed. A representative transformer system detects movement of an object and includes an excitation coil configured to receive an excitation coil input signal that results from an input sinusoidal signal. The transformer further includes first and second sensing coils, and a core configured to be operatively coupled to the object. The core moves relative to the first and second sensing coils when the object moves. First and second impedance loads are connected to the first and second sensing coils, respectively. The two impedance loads have different phase-shifting characteristics. A phase-shift sensing circuit determines a phase-shift between the excitation coil input signal and the input sinusoidal signal that is correlated with a position of the core relative to the first and second sensing coils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.