Electricity: motive power systems – Synchronous motor systems – Brushless motor closed-loop control
Reexamination Certificate
2011-03-08
2011-03-08
Duda, Rina I (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Brushless motor closed-loop control
C318S432000, C318S400220
Reexamination Certificate
active
07902776
ABSTRACT:
An improved electric motor has a rotor (124), a stator (125) having at least one phase winding strand (126), an output stage (122) for influencing the current flow in said phase winding strand, a DC link circuit (170) for supplying the output stage (122) with current, including a link circuit capacitor (178), and a control unit (132) having an arrangement (152) for sensing a value characterizing the current recharge into the link circuit capacitor (178), which control unit (132) is configured to specify commutation instants as a function of the sensed value, and to perform commutation operations in the power stage (122) at the commutation instants thus specified. Avoiding a need for prolonged “currentless intervals” permits achieving higher efficiency and power output, particularly in a motor having less than three winding phases.
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Duda Rina I
EBM-PAPST St. Beorgen GmbH and Co. KG
Oliver Intellectual Property LLC
Oliver, Esq. Milton
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