US 12,459,389 B2
Onboard medium-voltage vessel electric charging apparatus and method for onboard charging
Bijan Zahedi, Kongsberg (NO); Jens Hjorteset, Björöyhamn (NO); and Joao Pedro Meira Rego, Kongsberg (NO)
Assigned to Kongsberg Maritime AS, Horten (NO)
Appl. No. 18/699,926
Filed by Kongsberg Maritime AS, Horten (NO)
PCT Filed Oct. 7, 2022, PCT No. PCT/NO2022/050226
§ 371(c)(1), (2) Date Apr. 10, 2024,
PCT Pub. No. WO2023/063830, PCT Pub. Date Apr. 20, 2023.
Claims priority of application No. 20211217 (NO), filed on Oct. 11, 2021.
Prior Publication US 2024/0408991 A1, Dec. 12, 2024
Int. Cl. B60L 53/62 (2019.01); B60L 53/22 (2019.01); H02J 3/16 (2006.01)
CPC B60L 53/62 (2019.02) [B60L 53/22 (2019.02); H02J 3/16 (2013.01); B60L 2200/32 (2013.01); B60L 2210/30 (2013.01); H02J 2310/42 (2020.01)] 20 Claims
OG exemplary drawing
 
1. An onboard medium-voltage vessel electric charging apparatus (10), the apparatus (10) being connected to an AC power supply (40) at one side and to at least one onboard energy storage device (60) at the other side, comprising:
a rectifier unit (20) comprising a rectifier transformer (21) and at least one rectifier bridge (22) arranged in series between the AC power supply (40) and the at least one energy storage device (60); and
a controllable compensation unit (30) arranged in series between (i) the rectifier unit (20) or (ii) at least one energy storage device (60) and the AC power supply (40) in front of the rectifier transformer (21), wherein
the controllable compensation unit (30) is configured to compensate for voltage variations of the at least one energy storage device (60) by adding a series voltage phasor (Vs) with different amplitude and phase angle to supplied AC voltage (Vv) to adjust rectifier voltage (Vrec) of the rectifier unit (20).