CN109878675A - A kind of bi-motor coaxial-type pneumoelectric mixing ship power system - Google Patents
A kind of bi-motor coaxial-type pneumoelectric mixing ship power system Download PDFInfo
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- CN109878675A CN109878675A CN201910149494.2A CN201910149494A CN109878675A CN 109878675 A CN109878675 A CN 109878675A CN 201910149494 A CN201910149494 A CN 201910149494A CN 109878675 A CN109878675 A CN 109878675A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
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Abstract
The purpose of the present invention is to provide a kind of bi-motor coaxial-type pneumoelectric mixing ship power systems, including gas machine, generator, motor, battery, fuel cell, clutch, gear-box, propeller, natural gas storage feedway, transformation device, bank electricity device, network of ship, ship to load.Gas machine is connected by clutch with gear-box, first motor and the second motor pass through clutch respectively and are connected with gear-box, generator is connected with gearbox output, and two motors are connected by same axis, and electric power source is battery, generator and fuel cell.The present invention uses diversified energy arrangement form, with multiple-working mode, it can satisfy demand of the ship under various environment and operating condition, gas machine, motor can be made to maintain high efficient area always, reduce the fuel consumption and discharge of gas machine, the dynamic response of ship is improved simultaneously, and expands the navigable area of ship.
Description
Technical field
The present invention relates to a kind of ship power systems, specifically ship hybrid power system.
Background technique
As international oil price quickly goes up, and the implementation of emission regulation being increasingly stringenter, this is just to the economy of ship
More stringent requirements are proposed for property and emission performance, and energy-saving and emission-reduction have become the vital task in the national economic development.Ship is high
The means of transport of energy consumption, energy-conserving and emission-cutting technology become everybody and pay close attention to and one of the hot spot of research.
As following environment strategy, we are to reduce energy consumption and reduce CO2, SOx, NOx and PM discharge as target.
There are many pollutions and discharge that method can reduce ship, and wherein the best way is to utilize alternative energy source.Natural gas is as hair
The fuel of motivation is the inexorable trend of the following engine of boat and ship development, and natural gas has environmentally protective, economical and practical, safe and reliable
The advantages of.But it is limited by natural gas engine technical level at this stage is not high, that there are dynamic responses is poor for natural gas engine,
The disadvantages of underpower.
Pure electric vehicle watercraft electric propulsion system is the forward position of the following marine technology research, has good economy, manipulation
The advantages that property, safety, low noise and low pollution.However, influenced by generation mode, power density and energy storage technology,
Pure electric vehicle ship at this stage can not reach high performance speed, acceleration and automatic control, and cruising ability is also by its battery
Capacity restricts.
Hybrid power ship has the advantages of internal combustion engine propelling ship and pure Electrical Propulsion Ship concurrently: promoting compared to internal combustion engine
Ship can select operating mode according to payload, guarantee the fuel economy under all operating conditions, redundancy is good；Compared to pure
Electrical Propulsion Ship, initial stage input cost is low, and cruising ability is strong.The Technology of Hybrid Electric Vehicle of ship solves energy problem and skill
Contradiction between art is immature realizes the efficient utilization of fuel, is transitioned into pure electric power from traditional mechanical propulsion for ship and pushes away
Into feasible scheme is provided, therefore, developing hybrid power ship has very great meaning.
Summary of the invention
The purpose of the present invention is to provide the dynamic property, a kind of bi-motor coaxial-types of economy and emission performance that improve ship
Pneumoelectric mixing ship power system.
The object of the present invention is achieved like this:
A kind of bi-motor coaxial-type pneumoelectric mixing ship power system of the present invention, it is characterized in that: including gas machine, gear
Case, generator, the first motor, the second motor, LNG fluid reservoir, gear-box include first gear, second gear, the first tooth
Wheel engage with second gear, and generator connects the by second clutch by first clutch connection first gear, gas machine
One gear, the first motor connect second gear by third clutch, and the second motor passes through the 4th clutch connection second
Gear, propeller connect the first motor, and LNG fluid reservoir is separately connected gas machine, fuel cell, fuel by the heat exchanger that gasifies
Battery, battery pass through respective transformation device respectively and are connected with network of ship, bank electricity device, ship load connection ship electricity
Net.
The present invention may also include:
1, using mechanically-propelled mode, the mechanically-propelled mode includes that gas machine promotes mode, gas machine+generator to push away
Progressive die formula；
Gas machine promotes mode: second clutch, third clutch closure, other clutches disconnect, the first motor, the
The power supply of two motor disconnects, and propeller is driven by gas machine；
Gas machine+generator promotes mode: first clutch, second clutch, third clutch closure, first is electronic
The power supply disconnection of machine, the second motor, power a part that gas machine issues drive propeller, and another part power drives power generation
Machine power generation, network of ship can be imported by generating electricity.
2, using electric propulsion mode, the electric propulsion mode includes that battery promotes mode, fuel cell propulsion module
Formula, mixing electric propulsion mode, bank electricity charge mode；
Battery promotes mode: all clutches disconnect, and propeller is by the first motor drive, electricity needed for the first motor
It can be provided by battery through network of ship；Alternatively, third clutch, the 4th clutch are closed, other clutches are disconnected, propeller
By the second motor drive, electric energy needed for the second motor is provided by battery through network of ship；Alternatively, third clutch,
Four clutches closure, other clutches disconnect, and propeller is by the first motor, the second motor drive, the first motor, second
Electric energy needed for motor is provided by battery through network of ship；
Fuel cell promotes mode: all clutches disconnect, and propeller is by the first motor drive, needed for the first motor
Electric energy is provided by fuel cell through network of ship；Alternatively, third clutch, the 4th clutch are closed, other clutches are disconnected, spiral shell
Paddle is revolved by the second motor drive, and electric energy needed for the second motor is provided by fuel cell through network of ship；Alternatively, third clutch
Device, the 4th clutch closure, other clutches disconnect, and for propeller by the first motor, the second motor drive, first is electronic
Electric energy needed for machine, the second motor is provided by fuel cell through network of ship；
Mixing electric propulsion mode: having a clutch disconnection, and propeller is by the first motor drive, electric energy needed for the first motor
It is provided by battery, fuel cell through network of ship；Alternatively, third clutch, the 4th clutch are closed, other clutches are disconnected
It opens, by the second motor drive, electric energy needed for the second motor is provided by battery, fuel cell through network of ship propeller；
Alternatively, third clutch, the 4th clutch are closed, other clutches are disconnected, and propeller is driven by the first motor, the second motor
Dynamic, electric energy needed for the first motor, the second motor is provided by battery, fuel cell through network of ship；
Bank electricity charge mode: ship is battery by bank electricity charging unit external power supply when harbour and bank are stopped
Charging.
3, using hybrid propulsion mode, the hybrid propulsion mode include gas machine+motor promote mode, gas machine+
Motor auxiliary power generation promotes mode；
Gas machine+motor promotes mode: second clutch, third clutch closure, other clutches disconnect, propeller
It is driven jointly by gas machine and the first motor, electric energy needed for the first motor is provided by network of ship；Alternatively, the second clutch
Device, third clutch, the 4th clutch closure, other clutches disconnect, and propeller is driven jointly by gas machine and the second motor
Dynamic, electric energy needed for the second motor is provided by network of ship；Alternatively, second clutch, third clutch, the 4th clutch close
It closes, other clutches disconnect, and propeller drives jointly by gas machine and the first motor, the second motor, the first motor, the
Electric energy needed for two motor is provided by network of ship；
Gas machine+motor auxiliary power generation promotes mode: first clutch, second clutch, third clutch closure,
He disconnects clutch, and a part of power that gas machine is issued drives electrical power generators, and network of ship, gas can be imported by generating electricity
Machine another part power and the first motor drive propeller jointly, and electric energy needed for the first motor is provided by network of ship；Institute
There is clutch closure, a part of power that gas machine is issued drives electrical power generators, and network of ship, gas can be imported by generating electricity
Machine another part power and the second motor drive propeller jointly, and electric energy needed for the second motor is provided by network of ship；Or
Person, a part of power that gas machine is issued drive electrical power generators, and network of ship can be imported by generating electricity, gas machine another part
Power and the first motor, the second motor drive propeller jointly, and electric energy needed for the first motor, the second motor is by ship
Power grid provides.
Present invention has an advantage that
1. the invention proposes a kind of bi-motor coaxial-type pneumoelectric mixing ship power system, it is provided with gas machine, electronic
Machine, Power coverage range is wide, can satisfy power demand of the ship under more multi-state, and gas machine and motor can be made more preferable
Work in high efficient area, to reduce the fuel consumption of gas machine, improve the economy and emission performance of ship.
2. the arrangement of more than kinds of power source improves the reliability and applicability of ship, by the closure of clutch and disconnected
It opens, multiple-working mode may be implemented in hybrid power system provided by the present invention, improves ship hybrid power to the maximum extent
The efficiency of system can select suitable operating mode according to practical power demand and ship's navigation environment.The program can not only
Meet the discharge standard in different harbours and sea area, moreover it is possible to it is immature between further stringent discharge standard that technology be effectively relieved
Contradiction improves the economy and emission performance of ship.
3. motor has outstanding dynamic response, can closing and unlatching at any time, can be fast in ship variable working condition
The motivation of adjustment output of speed, improves the dynamic response of ship, reduces system maintenance.
4. significantly noise reduction may be implemented in electric propulsion, the navigable area of ship is increased, improves crewman's
Life comfort.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
It illustrates with reference to the accompanying drawing and the present invention is described in more detail:
In conjunction with Fig. 1, a kind of bi-motor coaxial-type pneumoelectric mixing ship power system of the present invention, including network of ship 1, bank electricity
Device 2, battery 3, battery transformation device 4, ship load 5, fuel cell transformation device 6, fuel cell 7, LNG tank 8, gas
Change heat exchanger 9, generator transformation device 10, gas machine 11, gear-box 12, generator 13, motor 14a, 14b, propeller 15,
Clutch 16a, 16b, 16c, 16d.11 output end of gas machine is connected by clutch 16b with the input terminal of gear-box 12, is generated electricity
Machine 13, motor 14a, 14b pass through clutch 16a, 16c, 16d respectively and are connected with gear-box, propeller 15 and motor 14a's
Output end is connected.LNG tank 8 is connected by the heat exchanger 9 that gasifies with gas machine 11, fuel cell 7.Fuel cell 7, battery 3 divide
Not Tong Guo transformation device 4,6 be connected with network of ship, bank electricity device 2, ship load 5 are connected with network of ship 1.
In the present embodiment, the preferred net gas engine of gas machine 11 or dual fuel engine, generator 13, motor
14a, 14b preferably have many advantages, such as high efficiency, high power density, service life long magneto, the preferred power density of battery 3 is high,
The small ferric phosphate lithium cell of volume weight.Solid oxide type of the natural gas as fuel preferably can be used directly in fuel cell 7
Fuel cell or phosphoric acid type fuel cell, gasification heat exchanger 9 preferably have the resistance to ultralow temperature heat exchanger of multistage cold energy heat exchange.
Operating mode of the invention mainly includes mechanically-propelled mode, electric propulsion mode, hybrid propulsion mode.
1. mechanically-propelled mode
Mechanically-propelled mode can be divided into: gas machine promotes mode, gas machine+generator to promote mode.
1) gas machine promotes mode: under this kind of operating mode, clutch 16b, 16c closure, other clutches are disconnected, electricity
The power supply of motivation 14a, 14b disconnects, and propeller 15 is driven by gas machine 11.
2) gas machine+generator promotes mode: under this kind of operating mode, clutch 16a, 16b, 16c closure, and motor
The power supply of 14a, 14b disconnect, and power a part that gas machine 11 issues drives propeller 15, and another part power drives generator
13 power generations, network of ship 1 can be imported by generating electricity.
2. electric propulsion mode
Electric propulsion mode can be divided into: battery promotes mode, fuel cell to promote mode, mixing electric propulsion mode, bank
Electric charge mode.
1) battery promotes mode: under this kind of operating mode, all clutches are disconnected, and propeller 15 is by motor 14a
It drives, electric energy needed for motor 14a is provided by battery 3 through network of ship 1；Alternatively, clutch 16c, 16d be closed, other from
Clutch disconnects, and propeller 15 is driven by motor 14b, and electric energy needed for motor 14b is provided by battery 3 through network of ship 1；Or
Person, clutch 16c, 16d closure, other clutches disconnect, and propeller 15 is driven by motor 14a, 14b, motor 14a, 14b
Required electric energy is provided by battery 3 through network of ship 1.
2) fuel cell promotes mode: under this kind of operating mode, all clutches are disconnected, and propeller 15 is by motor
14a drives, and electric energy needed for motor 14a is provided by fuel cell 7 through network of ship 1；Alternatively, clutch 16c, 16d are closed,
He disconnects clutch, and propeller 15 is driven by motor 14b, and electric energy needed for motor 14b is by fuel cell 7 through network of ship 1
It provides；Alternatively, clutch 16c, 16d are closed, other clutches are disconnected, and propeller 15 is driven by motor 14a, 14b, motor
Electric energy needed for 14a, 14b is provided by fuel cell 7 through network of ship 1.
3) it mixes electric propulsion mode: under this kind of operating mode, there is clutch disconnection, propeller 15 is driven by motor 14a
Dynamic, electric energy needed for motor 14a is provided by battery 3, fuel cell 7 through network of ship 1；Alternatively, clutch 16c, 16d are closed
It closes, other clutches disconnect, and propeller 15 is driven by motor 14b, and electric energy needed for motor 14b is by battery 3, fuel cell
7 provide through network of ship 1；Alternatively, clutch 16c, 16d be closed, other clutches disconnect, propeller 15 by motor 14a,
14b drives, and electric energy needed for motor 14a, 14b is provided by battery 3, fuel cell 7 through network of ship 1.
4) bank electricity charge mode: under this kind of operating mode, ship can be charged when harbour and bank are stopped by bank electricity
2 external power supply of device is the charging of battery 3.
3. hybrid propulsion mode
Hybrid propulsion mode can be divided into: gas machine+motor promotes mode, gas machine+motor auxiliary power generation propulsion module
Formula.
1) gas machine+motor promotes mode: under this kind of operating mode, clutch 16b, 16c closure, and other clutches
It disconnects, propeller 15 is driven jointly by gas machine 11 and motor 14a, and electric energy needed for motor 14a is provided by network of ship 1；
Alternatively, clutch 16b, 16c, 16d are closed, other clutches are disconnected, and propeller is driven jointly by gas machine 11 and motor 14b
Dynamic, electric energy needed for motor 14b is provided by network of ship 1；Alternatively, clutch 16b, 16c, 16d are closed, other clutches are disconnected
It opens, propeller is driven jointly by gas machine 11 and motor 14a, 14b, and electric energy needed for motor 14a, 14b is mentioned by network of ship 1
For.
2) gas machine+motor auxiliary power generation promotes mode: under this kind of operating mode, clutch 16a, 16b, 16c are closed
It closes, other clutches disconnect, and a part of power that gas machine 11 is issued drives generator 13 to generate electricity, and ship can be imported by generating electricity
Power grid 1,11 another part power of gas machine and motor 14a drive propeller 15 jointly, and electric energy needed for motor 14a is by ship
Power grid 1 provides；All clutch closures, a part of power that gas machine 11 is issued drive generator 13 to generate electricity, generated electricity energy
Network of ship 1 is imported, 11 another part power of gas machine and motor 14b drive propeller 15, electricity needed for motor 14b jointly
It can be provided by network of ship 1；Alternatively, a part of power that gas machine 11 is issued drives generator 13 to generate electricity, generating electricity can converge
Enter network of ship 1,11 another part power of gas machine and motor 14a, 14b drive propeller 15, motor 14a, 14b jointly
Required electric energy is provided by network of ship 1.
In above-mentioned mode: the long-time that mechanically-propelled mode is suitable for vessel motion stable conditions is cruised, or to ship
Discharge and the not high region of noise requirements；Electric propulsion mode is suitable for the feelings of low-power requirements when ship pulls in shore or departs from port
Condition, or navigation is in the region having higher requirements to ship discharge and noise；Hybrid propulsion mode is suitable for ship to propulsion
When power or the speed of a ship or plane have certain demand.
The marine diesel subsidiary engine of arrangement power generation, ship can not be had to using ship hybrid power system provided by the invention
Load 5 required for electric power provided by battery 3 or fuel cell 7, if generator 13 run when if preferentially using its issue
Electric energy, the priority that ship loads 5 electricity consumptions is: generator 13 is greater than fuel cell 7 and is greater than battery 3.
Claims (5)
1. a kind of bi-motor coaxial-type pneumoelectric mixing ship power system, it is characterized in that: include gas machine, gear-box, generator,
First motor, the second motor, LNG fluid reservoir, gear-box include first gear, second gear, first gear and the second tooth
Wheel engagement, generator by first clutch connect first gear, gas machine by second clutch connection first gear, first
Motor connects second gear by third clutch, and the second motor connects second gear, propeller by the 4th clutch
The first motor is connected, LNG fluid reservoir is separately connected gas machine, fuel cell, fuel cell, battery by the heat exchanger that gasifies
It is connected respectively by respective transformation device with network of ship, bank electricity device, ship load connection network of ship.
2. a kind of bi-motor coaxial-type pneumoelectric mixing ship power system according to claim 1, it is characterized in that: using machine
Tool promotes mode, and the mechanically-propelled mode includes that gas machine promotes mode, gas machine+generator to promote mode；
Gas machine promotes mode: second clutch, third clutch closure, other clutches disconnect, the first motor, the second electricity
The power supply of motivation disconnects, and propeller is driven by gas machine；
Gas machine+generator promotes mode: first clutch, second clutch, third clutch closure, the first motor, the
The power supply of two motor disconnects, and power a part that gas machine issues drives propeller, and another part power drives generator hair
Electricity, network of ship can be imported by generating electricity.
3. a kind of bi-motor coaxial-type pneumoelectric mixing ship power system according to claim 1 or 2, it is characterized in that: adopting
Progressive die formula is pushed in electricity consumption, and the electric propulsion mode includes that battery promotes mode, fuel cell to promote mode, mixing electric propulsion
Mode, bank electricity charge mode；
Battery promotes mode: all clutches disconnect, propeller by the first motor drive, electric energy needed for the first motor by
Battery is provided through network of ship；Alternatively, third clutch, the 4th clutch are closed, other clutches are disconnected, and propeller is by the
Two motor drives, electric energy needed for the second motor are provided by battery through network of ship；Alternatively, third clutch, the 4th from
Clutch closure, other clutches disconnect, and propeller is the first motor, second electronic by the first motor, the second motor drive
Electric energy needed for machine is provided by battery through network of ship；
Fuel cell promotes mode: all clutches disconnect, and propeller is by the first motor drive, electric energy needed for the first motor
It is provided by fuel cell through network of ship；Alternatively, third clutch, the 4th clutch are closed, other clutches are disconnected, propeller
By the second motor drive, electric energy needed for the second motor is provided by fuel cell through network of ship；Alternatively, third clutch,
4th clutch closure, other clutches disconnect, and propeller is by the first motor, the second motor drive, the first motor, the
Electric energy needed for two motor is provided by fuel cell through network of ship；
Mixing electric propulsion mode: having a clutch disconnection, and propeller is by the first motor drive, and electric energy needed for the first motor is by storing
Battery, fuel cell are provided through network of ship；Alternatively, third clutch, the 4th clutch are closed, other clutches are disconnected, spiral shell
Paddle is revolved by the second motor drive, and electric energy needed for the second motor is provided by battery, fuel cell through network of ship；Alternatively,
Third clutch, the 4th clutch closure, other clutches disconnect, and propeller is by the first motor, the second motor drive, and the
Electric energy needed for one motor, the second motor is provided by battery, fuel cell through network of ship；
Bank electricity charge mode: ship is when harbour and bank are stopped, to charge the battery by bank electricity charging unit external power supply.
4. a kind of bi-motor coaxial-type pneumoelectric mixing ship power system according to claim 1 or 2, it is characterized in that: adopting
With hybrid propulsion mode, the hybrid propulsion mode includes that gas machine+motor promotes mode, gas machine+motor auxiliary hair
Electric propulsion mode；
Gas machine+motor promotes mode: second clutch, third clutch closure, other clutches disconnect, and propeller is by gas
Body machine and the first motor drive jointly, and electric energy needed for the first motor is provided by network of ship；Alternatively, second clutch,
Three clutches, the 4th clutch closure, other clutches disconnect, and propeller is driven jointly by gas machine and the second motor, the
Electric energy needed for two motor is provided by network of ship；Alternatively, second clutch, third clutch, the 4th clutch are closed, other
Clutch disconnects, and propeller drives jointly by gas machine and the first motor, the second motor, the first motor, second electronic
Electric energy needed for machine is provided by network of ship；
Gas machine+motor auxiliary power generation promotes mode: first clutch, second clutch, third clutch closure, other from
Clutch disconnects, and a part of power that gas machine is issued drives electrical power generators, and network of ship can be imported by generating electricity, and gas machine is another
A part of power and the first motor drive propeller jointly, and electric energy needed for the first motor is provided by network of ship；It is all from
Clutch closure, a part of power that gas machine is issued drive electrical power generators, and network of ship can be imported by generating electricity, and gas machine is another
A part of power and the second motor drive propeller jointly, and electric energy needed for the second motor is provided by network of ship；Alternatively, gas
A part of power that body machine is issued drives electrical power generators, and network of ship can be imported by generating electricity, gas machine another part power
Propeller is driven jointly with the first motor, the second motor, and electric energy needed for the first motor, the second motor is by network of ship
It provides.
5. a kind of bi-motor coaxial-type pneumoelectric mixing ship power system according to claim 3, it is characterized in that: using mixed
Propulsion mode is closed, the hybrid propulsion mode includes that gas machine+motor promotes mode, gas machine+motor auxiliary power generation to push away
Progressive die formula；
Gas machine+motor promotes mode: second clutch, third clutch closure, other clutches disconnect, and propeller is by gas
Body machine and the first motor drive jointly, and electric energy needed for the first motor is provided by network of ship；Alternatively, second clutch,
Three clutches, the 4th clutch closure, other clutches disconnect, and propeller is driven jointly by gas machine and the second motor, the
Electric energy needed for two motor is provided by network of ship；Alternatively, second clutch, third clutch, the 4th clutch are closed, other
Clutch disconnects, and propeller drives jointly by gas machine and the first motor, the second motor, the first motor, second electronic
Electric energy needed for machine is provided by network of ship；
Gas machine+motor auxiliary power generation promotes mode: first clutch, second clutch, third clutch closure, other from
Clutch disconnects, and a part of power that gas machine is issued drives electrical power generators, and network of ship can be imported by generating electricity, and gas machine is another
A part of power and the first motor drive propeller jointly, and electric energy needed for the first motor is provided by network of ship；It is all from
Clutch closure, a part of power that gas machine is issued drive electrical power generators, and network of ship can be imported by generating electricity, and gas machine is another
A part of power and the second motor drive propeller jointly, and electric energy needed for the second motor is provided by network of ship；Alternatively, gas
A part of power that body machine is issued drives electrical power generators, and network of ship can be imported by generating electricity, gas machine another part power
Propeller is driven jointly with the first motor, the second motor, and electric energy needed for the first motor, the second motor is by network of ship
It provides.
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Cited By (5)
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| CN111332448A (en) * | 2020-03-28 | 2020-06-26 | 哈尔滨工程大学 | Integrated power turbine single-shaft double-motor ship ammonia-electricity hybrid power system |
| CN112339963A (en) * | 2019-08-08 | 2021-02-09 | 株洲中车时代电气股份有限公司 | Direct-current networking ship electric propulsion system and method |
| CN113734406A (en) * | 2020-05-28 | 2021-12-03 | 中国船舶重工集团公司第七一一研究所 | LNG driving system based on distance oar |
| CN115092373A (en) * | 2022-05-27 | 2022-09-23 | 广东逸动科技有限公司 | Power device, control method thereof, marine propeller and ship |
| WO2023187766A1 (en) * | 2022-04-01 | 2023-10-05 | Ecomar Propulsion Ltd | An energy management and control system |
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