US 11,952,094 B2
Marine power system
Harri Lipponen, Helsinki (FI); Arber Haxhiu, Helsinki (FI); Sami Kanerva, Helsinki (FI); and Mikko Kajava, Helsinki (FI)
Assigned to ABB Schweiz AG, Baden (CH)
Filed by ABB Schweiz AG, Baden (CH)
Filed on May 3, 2021, as Appl. No. 17/306,446.
Claims priority of application No. 20173227 (EP), filed on May 6, 2020.
Prior Publication US 2021/0347459 A1, Nov. 11, 2021
Int. Cl. B63H 21/17 (2006.01); B60L 50/70 (2019.01); H02M 7/44 (2006.01); H02P 27/06 (2006.01)
CPC B63H 21/17 (2013.01) [B60L 50/70 (2019.02); H02M 7/44 (2013.01); H02P 27/06 (2013.01); B60L 2200/32 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A marine power system comprising:
multiple of fuel cells:
multiple of DC/AC converters; and
at least one propulsion motor,
wherein:
each fuel cell of the multiple of fuel cells is connectable to an input of a DC/AC converter of the multiple of DC/AC converters
at least one group of the multiple of DC/AC converters is connectable to the at least one propulsion motor to provide variable frequency and amplitude voltage to the at least one propulsion motor,
at least one of the multiple of DC/AC converters if connectable to a fixed frequency AC bus to provide voltage with a fixed frequency and amplitude to the fixed frequency AC bus,
the power system further comprises a transformer which is connectable between an output of the at least one of the multiple of DC/AC converters and the fixed frequency AC bus, and
the transformer comprises multiple of primary windings, each primary winding being connectable to a separate DC/AC converter, and a secondary winding connectable to the fixed frequency AC bus.