Measuring apparatus including phase locked loop and measuring method thereof
US10215784B1 · kind B1 · utility
0Cited by
9References
15Claims
0Family size
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Key dates
| Filing date | Dec 6, 2017 |
| Grant date | Feb 26, 2019 |
| Priority date | — |
| Expiry date | Dec 6, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A measuring system, during a measurement process thereof, uses a phase-locked loop mechanism of a stator phase voltage and a stator phase current of a three-phase AC motor to effectively remove harmonics and to sense and obtain the amplitude effective values of the phase voltage and the phase current of the three-phase AC motor and the phase difference between the phase voltage and phase current. Therefore, the measuring apparatus is capable of quickly and accurately calculating the input power of the motor without having to measure the parameters of the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.