Patent · US Active

Variable frequency drive and methods for filter capacitor fault detection

US8937796B2 · kind B2 · utility

8Cited by
25References
24Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJun 26, 2012
Grant dateJan 20, 2015
Priority date
Expiry dateApr 11, 2033

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01R31/64
  • WIPO fieldElectrical machinery, apparatus, energy
  • WIPO sectorElectrical engineering

Abstract

Variable frequency motor drives and control techniques are presented in which filter capacitor faults are detected by measuring filter neutral node currents and/or voltages and detecting changes in a frequency component of the measured neutral condition and/or based on input current unbalance.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.