Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Synchronizing or phasing control
Reexamination Certificate
2007-09-11
2007-09-11
Masih, Karen (Department: 2837)
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Synchronizing or phasing control
C318S072000, C318S132000, C318S254100, C318S434000, C318S599000
Reexamination Certificate
active
11295935
ABSTRACT:
A method of controlling synchronous running of a plurality of electronically commutated motors (22, 24, 26), each of which includes a stator having a stator winding (40, 42, 44), a permanent-magnet rotor (28, 30, 32), and at least one arrangement (34, 36, 38), associated with the respective motor, for sensing its rotor position and for generating a rotor position signal (H1, H2, H3). Also provided is an energization arrangement (46), to which the stator windings (40, 42, 44) of the motors are connected. The method includes the steps of detecting occurrence of a predetermined state of the rotor position signals (H1, H2, H3) and, in response thereto, triggering simultaneously commutation of the currents in all the motors.
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ebm-papst St. Georgen GmbH & Co. KG
Masih Karen
Oliver, Esq. Milton
Ware Fressola Van Der Sluys & Adolphson LLP
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