Patent · US Expired

Method for effecting the power-optimal control of BLDC motors

US7315142B2 · kind B2 · utility

5Cited by

6References

21Claims

0Family size

Assignee

MELEXIS NV · BE

Inventors

Harald Lindemann · Bad Berka, DE
Joergen Sturm · Weimar, DE

Key dates

Filing date	Feb 24, 2004
Grant date	Jan 1, 2008
Priority date	—
Expiry date	Feb 24, 2024

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P80/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method for a power optimal control of a BLDC motor by continuously updated commutation points and circuit assembly for a power optimal control of a BLDC motor. The method includes measuring a time difference (ΔT) between two immediately subsequent zero crossings (TN1, TN2) of first and second motor phases, and performing a commutation of an immediately next motor phase after substantially one-half of the time difference (ΔT/2) elapses after the zero crossing of the second motor phase (TN2). The commutation is performed for all phases in a continuous manner in accordance with a switching algorithm (Tcommutation=TN2+(ΔT/2)).

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