Electricity: motive power systems – Switched reluctance motor commutation control
Reexamination Certificate
2005-10-18
2005-10-18
Duda, Rina (Department: 2837)
Electricity: motive power systems
Switched reluctance motor commutation control
C318S434000, C318S132000, C318S432000, C318S569000, C318S600000
Reexamination Certificate
active
06956340
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.
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Kuner Arnold
Schondelmaier Hans-Dieter
Duda Rina
ebm-papst St. Georgen GmbH & Co. KG
Milton Oliver, Esq.
Ware Fressola Van Der Sluys & Adolphson LLP
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