Marine drive system

Details Marine drive system Marine drive system

B - Operations, Transporting

63

H

342/34.4

B63H 21/12 (2006.01) B63G 8/08 (2006.01) F42B 19/24 (2006.01) H02P 23/00 (2006.01)

Patent

CA 1167147

-14- RMD-1149 MARINE DRIVE SYSTEM ABSTRACT OF THE DISCLOSURE A marine drive system utilizing a multiphase induction motor for driving the propulsion propeller of the drive from a battery power supply. The number of phases defined by the motor stator winding, in the pre- ferred embodiment of the invention, is at least four and the windings are excited by a corresponding plurality of inverters connected one each to the windings from the power supply batteries for exciting the windings. Har- monic currents in the windings are effectively suppressed by providing the drive motor in a configuration having high leakage reactance in the stator. The windings may be arranged as multiples of three-phase windings. In the illustrated embodiment, the inverters are arranged to define three three-phase half-bridge inverters for excit- ing three sets of three-phase windings of the motor stator.

406191

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