Patent · US Active

Phase current regulation in BLDC motors

US9479096B2 · kind B2 · utility

2Cited by

2References

9Claims

0Family size

Assignee

MELEXIS TECHNOLOGIES NV · BE

Inventors

Jan Heynlein · Erfurt, DE
Thomas Freitag · Hamburg, DE
Christian Paintz · Erfurt, DE

Key dates

Filing date	Nov 3, 2014
Grant date	Oct 25, 2016
Priority date	—
Expiry date	Nov 3, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH02H7/0838
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method is provided for determining a phase current direction and a zero-crossing moment of the phase current in a sinusoidally controlled brushless direct current motor. The brushless direct current motor comprises a coil per phase and the phase of the brushless direct current motor is driven by a half bridge driver. The half bridge driver comprises a high side field effect transistor and a low side field effect transistor. The method comprising the following steps: measuring the drain source voltage over the high side field effect transistor and low side field effect transistor, and determining the zero crossing moment of the phase current by determining the current direction based on the measured drain source voltages and by determining the moment the current changes direction.

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