Method for processing data for an electronically commutated motor and motor for carrying out said method

US6956340B2 · kind B2 · utility

Assignee

• ebm-papst St. Georgen GmbH & Co. KG · DE

Inventors

• Hans-Dieter Schondelmaier · St. Georgen, DE
• Arnold Kuner · St. Georgen, DE

Key dates

• Filing date: Dec 5, 2002
• Grant date: Oct 18, 2005
• Expiry date: Mar 22, 2023

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02P6/08
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

The invention relates to a computer-controlled electronically commutated motor (ECM) and to an improved method for processing data therein. The computer's program executes the steps of: a) defining, in recurrent steps, the rotor position region in which a current pulse is to flow through the at least one winding phase, and the duration (TCurr) of that current pulse; b) sensing, in recurrent steps, the rotation-speed-dependent time period (TPP) required by the rotor to pass through a predetermined rotation angle range; c) monitoring the ratio between that rotation-speed-dependent time period (TPP) and the duration (Tcurr) of the current pulses; and d) as a function of the magnitude of that ratio, choosing a time to perform, in the computer, at least one predetermined calculation, either during (Flag_Fct_Within=1) the duration (TCurr) of a current pulse or in a time span outside (Flag_Fct_Within=0) a current pulse. As a result of this judicious time allocation, even an inexpensive computer can perform both commutation control and other calculation tasks without time conflicts.