Electricity: motive power systems – Synchronous motor systems – Brushless motor closed-loop control
Reexamination Certificate
2008-01-16
2010-06-01
Benson, Walter (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Brushless motor closed-loop control
C318S599000, C318S801000, C363S040000, C363S078000, C702S064000
Reexamination Certificate
active
07728538
ABSTRACT:
There is a method of estimating values of winding currents, at an instant of a period, in a winding of a load, controlled in space vector modulation mode through symmetrical control phases. The winding is cyclically coupled between two supply lines through respective switches. A measuring device is alternately coupled to the supply lines. A current of one supply line, with anticipation smaller than or equal to half of the period with respect to the instant and chosen so the current is equal in amplitude to the winding current, and a current of the supply line with delay equal to the anticipation with respect to the instant, is measured. The winding current is estimated at the instant based upon the supply line currents. A threshold interval is fixed between consecutive switching edges of control phases of the winding and another control phase of the switching period wherein current is measured.
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D'Angelo Giuseppe
Moselli Giovanni
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Benson Walter
Colon-Santana Eduardo
Jorgenson Lisa K.
STMicroelectronics S.R.L.
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