Patent ID: 8299638
Filing Date: 2012-10-30
Classification: B60L,B63H,B63J

Abstract:
1. A propulsion system for ships and other mobile marine structures, comprising: a driving machine having a mechanical rotating output; a generator comprising a permanently magnetized synchronous machine having a first number of poles; a propulsion motor comprising a permanently magnetized synchronous machine having a second number of poles; wherein the propulsion motor is configured so that it has essentially the same operating characteristics as the generator; a propulsion device; wherein the generator and the propulsion motor are directly connected by an electrical connection; wherein the generator is run by the driving machine; wherein the generator generates electricity of a frequency according to a rotational speed of the driving machine; and wherein rotation of the propulsion motor is synchronized with the generator; wherein the propulsion motor rotates at a speed according to the frequency of electricity supplied from the generator and causes the rotation of the propulsion device.