broadsword
Brigadier
The GE LM2500 weighs 5.25 tons. If an industrial gas turbine weighs 15 tons, I think the difference of 10 tons is probably not an issue for a navy ship as small as a frigate. It is not 100 tons.
Chinese Marine Propulsion
- Thread starter jobjed
- Start date
broadsword
Brigadier
The number I gave was for the marine propulsion G4 series.
Since there is no dedicated thread for IEPS and the most likely first application is 055, I post it here.
I came accross of this article published in 2015
The Development of a 20MW PWM Driver for Advanced Fifteen-Phase Propulsion Induction Motors
It is writen by NUE (Naval University of Engineering, Proffesser Ma's school). In it there is this picture
This is a photo taken from another angle of Ma's test rig that we have seen in the following photo. This means that the 20MW IEPS module has been tested since 2014 at least. I red crossed the label "gearbox" because according to the article above, it is actually dummy payload "hydraulic dynamometer". I was always in doubt of it being gearbox because with low RPM electrical motors, there is no need for gearbox. The 20MW motor is running at 200RPM at maximum power output, which is low (RPM).
Worth to note is that UK use coverteam 20MW drive for their IEPS, USN Zumwalt class use the same 20MW (perhaps uprated) module as well.
I came accross of this article published in 2015
The Development of a 20MW PWM Driver for Advanced Fifteen-Phase Propulsion Induction Motors
It is writen by NUE (Naval University of Engineering, Proffesser Ma's school). In it there is this picture
This is a photo taken from another angle of Ma's test rig that we have seen in the following photo. This means that the 20MW IEPS module has been tested since 2014 at least. I red crossed the label "gearbox" because according to the article above, it is actually dummy payload "hydraulic dynamometer". I was always in doubt of it being gearbox because with low RPM electrical motors, there is no need for gearbox. The 20MW motor is running at 200RPM at maximum power output, which is low (RPM).
Worth to note is that UK use coverteam 20MW drive for their IEPS, USN Zumwalt class use the same 20MW (perhaps uprated) module as well.
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There are big differences however. UK Type 45 uses a AC power distribution and so does Zumwalt class, where as the Chinese are using medium voltage DC power distribution. This is a huge difference, and will likely contribute to quite different reliability characteristics. For a quick overview of DC vs AC power distribution system on boat, see
Most IEPS motor are DC motor. I am not sure if UK Type 45 and Zumwalt do a AC-to-DC conversion before feeding into the IEPS motor. It is interesting to note that both Type 45 and Zumwalt have been beset by electrical system/propulsion reliability issues; but it is not clear whether that had to do with the additional complexities presented by an AC distribution power system.
I know that, I was emphasizing the power output being in the same class for the similar application "destroyer around 10000 ton displacement with two drive shaft." In other words, I was trying to say that this test rig is meant for type 055 class.
No, most (if not all) IEPS use AC motor including the Chinese ones. To change RPM one need to change the frequency. A DC grid will convert the DC to AC first, then using power semiconductors to change frequency, then drive the AC motor. In the article, it says "advanced fifteen-phase propulsion induction motors". Induction motor is AC motor.
The difference between the US/UK system and Chinese system is the power bus being AC vs. DC. The motors are all AC induction motor.
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I stand corrected. Did a bit more digging. Type 45 is a VFI driven induction motor. As you said, variable frequency.
Even though the IEPS uses an AC motor, the motor frequency is decoupled from the AC distribution frequency. As such from the perspective of driving the IEPS motor there is no simplification benefits to use AC power distribution vs DC. Either way there needs to be a power driver to generate the variable frequency AC.
The benefits of DC are with grid management and design, not with the power train itself.
Hendrik_2000
Lieutenant General
Via Vincent
712 research institute developed 690V, 1000kw class and 3300V, 3000kw class IEP systems. It has also developed 5.5kw, 9.5kw, 20kw, 75kw and 200kw class shaft-less rim driven propulsion systems. It is currently developing 1000kw class versions
CSIC has produced 30kw class PEMFC fuel cells
Apparently China has been experimenting and built IEP prototype for some time now
Overview of Domestic Integrated Electric Propulsion System: Starting from Technology Tracking
Due to the high initial investment, the integrated electric propulsion system is rarely used in the civil transport ship market, but since the 21st century, the development of my country's civil ship electric propulsion technology has made great progress in the engineering ship and official ship market. In 2002, the 18,000t-class semi-submersible ship "Taiankou" built by Guangzhou Shipbuilding International for COSCO was the first self-built large-scale special ship for marine engineering in my country. It adopted two sets of SSP pod electric propulsion systems; Haijian 83" is a ship designed by our country with an all-electric propulsion system with a compact pod device. Subsequently, the Yanda train ferry, which was put into trial operation in 2006, also adopted an electric propulsion ship. In October of the same year, Tianjin Xingang Shipyard The construction of my country's first train ro-ro ship with full electric propulsion system, "China Railway Bohai No. 1", was successfully delivered. In recent years, semi-submersible heavy-duty ships, crane ships and geophysical exploration ships designed by 708 mostly use all-electric propulsion systems, such as "Hua Hailong", "CNOOC 278", "CNOOC 720" and so on. However, due to the insufficient research and development capabilities of domestic marine equipment, most of the electric propulsion systems for civil ships are designed by foreign systems integration, and the development of comprehensive electric propulsion technology is still in a passive follow-up state. The good news is that the integrated electric propulsion system of a certain university in my country has passed the prototype test and initially has the ability to ship.
The comprehensive electric propulsion ship model exhibited by CSSC
Domestic marine propulsion motor with independent intellectual property rights
The core equipment of marine electric propulsion system includes: marine inverter, marine propulsion motor, new phase-shifting transformer, power management system, etc. At the 2017 Shanghai International Maritime Exhibition, the 712th Research Institute of China Shipbuilding Industry Corporation exhibited an exhibition board to introduce its domestic 400V/690V and 3300V/6600V marine propulsion motor products with independent intellectual property rights, as well as the matching generator sets, mobile Phase transformers, propulsion inverters and side propulsion systems. It can be seen that my country has initially mastered the core technology of the integrated electric propulsion system.
According to the public information of the 712th Research Institute, the 712th Research Institute has always insisted on developing the core equipment of the domestic electric propulsion system with independent intellectual property rights. By carrying out the integration of 3 megawatt and 10 megawatt electric propulsion systems and the development of core equipment for domestic electric propulsion systems, we have provided my country's first low-voltage 690V, 1000 kilowatt-class domestic electric propulsion system and core equipment for military auxiliary ships. And my country's first set of medium-voltage 3300V, 3000-kilowatt domestic electric propulsion system and core equipment, filling the domestic technical gap, and has delivered multiple sets of ships in batches. At the same time, in view of the fact that the core equipment of the electric propulsion system of civil ships has been monopolized by foreign companies for a long time, at the beginning of 2013, the institute analyzed the characteristics of the civil market in detail, and made use of the accumulation of military technology to actively develop core equipment suitable for the electric propulsion of civil ships. Successfully developed products such as propulsion inverters, propulsion motors, air-water-cooled phase-shifting transformers, and power management systems for civil ships below 20 MW. At present, the institute has low-voltage 690V, power below 3 megawatts; medium-voltage 3300V, power below 10 megawatts, electric propulsion system integration and core equipment serialization product supply capacity, as well as low-voltage 690V, medium-voltage 3300V, power below 20 megawatts Electric propulsion system integration and core equipment supply capabilities. Among them, the 690V voltage level serialized propulsion inverter is currently the only marine inverter product that has obtained CCS type approval.
In May 2014, 712 domestic electric propulsion systems beat foreign companies to obtain a supply contract for 4 66-meter light purse seine fishing boats, realizing the first batch application of the key equipment of the domestic electric propulsion system in the field of civil ships; October , once again defeated foreign companies to obtain a supply contract for a 3,600-ton crane ship from China Railway Bridge Bureau; on October 17, the 2,800-kilowatt domestic electric propulsion system and core equipment developed for offshore engineering deep-water oilfield engineering support ships successfully completed the onshore integrated connection. The commissioning test was well received by the user, China Oilfield Services Co., Ltd.; in December, the nationally produced electric propulsion system of the institute successfully won the supply contract for the offshore test platform of the Hangzhou Institute of Applied Acoustics.
The core of the domestic integrated electric propulsion system with independent intellectual property rights in China, the propulsion motor
712 research institute developed 690V, 1000kw class and 3300V, 3000kw class IEP systems. It has also developed 5.5kw, 9.5kw, 20kw, 75kw and 200kw class shaft-less rim driven propulsion systems. It is currently developing 1000kw class versions
CSIC has produced 30kw class PEMFC fuel cells
Apparently China has been experimenting and built IEP prototype for some time now
Overview of Domestic Integrated Electric Propulsion System: Starting from Technology Tracking
Due to the high initial investment, the integrated electric propulsion system is rarely used in the civil transport ship market, but since the 21st century, the development of my country's civil ship electric propulsion technology has made great progress in the engineering ship and official ship market. In 2002, the 18,000t-class semi-submersible ship "Taiankou" built by Guangzhou Shipbuilding International for COSCO was the first self-built large-scale special ship for marine engineering in my country. It adopted two sets of SSP pod electric propulsion systems; Haijian 83" is a ship designed by our country with an all-electric propulsion system with a compact pod device. Subsequently, the Yanda train ferry, which was put into trial operation in 2006, also adopted an electric propulsion ship. In October of the same year, Tianjin Xingang Shipyard The construction of my country's first train ro-ro ship with full electric propulsion system, "China Railway Bohai No. 1", was successfully delivered. In recent years, semi-submersible heavy-duty ships, crane ships and geophysical exploration ships designed by 708 mostly use all-electric propulsion systems, such as "Hua Hailong", "CNOOC 278", "CNOOC 720" and so on. However, due to the insufficient research and development capabilities of domestic marine equipment, most of the electric propulsion systems for civil ships are designed by foreign systems integration, and the development of comprehensive electric propulsion technology is still in a passive follow-up state. The good news is that the integrated electric propulsion system of a certain university in my country has passed the prototype test and initially has the ability to ship.
The comprehensive electric propulsion ship model exhibited by CSSC
Domestic marine propulsion motor with independent intellectual property rights
The core equipment of marine electric propulsion system includes: marine inverter, marine propulsion motor, new phase-shifting transformer, power management system, etc. At the 2017 Shanghai International Maritime Exhibition, the 712th Research Institute of China Shipbuilding Industry Corporation exhibited an exhibition board to introduce its domestic 400V/690V and 3300V/6600V marine propulsion motor products with independent intellectual property rights, as well as the matching generator sets, mobile Phase transformers, propulsion inverters and side propulsion systems. It can be seen that my country has initially mastered the core technology of the integrated electric propulsion system.
According to the public information of the 712th Research Institute, the 712th Research Institute has always insisted on developing the core equipment of the domestic electric propulsion system with independent intellectual property rights. By carrying out the integration of 3 megawatt and 10 megawatt electric propulsion systems and the development of core equipment for domestic electric propulsion systems, we have provided my country's first low-voltage 690V, 1000 kilowatt-class domestic electric propulsion system and core equipment for military auxiliary ships. And my country's first set of medium-voltage 3300V, 3000-kilowatt domestic electric propulsion system and core equipment, filling the domestic technical gap, and has delivered multiple sets of ships in batches. At the same time, in view of the fact that the core equipment of the electric propulsion system of civil ships has been monopolized by foreign companies for a long time, at the beginning of 2013, the institute analyzed the characteristics of the civil market in detail, and made use of the accumulation of military technology to actively develop core equipment suitable for the electric propulsion of civil ships. Successfully developed products such as propulsion inverters, propulsion motors, air-water-cooled phase-shifting transformers, and power management systems for civil ships below 20 MW. At present, the institute has low-voltage 690V, power below 3 megawatts; medium-voltage 3300V, power below 10 megawatts, electric propulsion system integration and core equipment serialization product supply capacity, as well as low-voltage 690V, medium-voltage 3300V, power below 20 megawatts Electric propulsion system integration and core equipment supply capabilities. Among them, the 690V voltage level serialized propulsion inverter is currently the only marine inverter product that has obtained CCS type approval.
In May 2014, 712 domestic electric propulsion systems beat foreign companies to obtain a supply contract for 4 66-meter light purse seine fishing boats, realizing the first batch application of the key equipment of the domestic electric propulsion system in the field of civil ships; October , once again defeated foreign companies to obtain a supply contract for a 3,600-ton crane ship from China Railway Bridge Bureau; on October 17, the 2,800-kilowatt domestic electric propulsion system and core equipment developed for offshore engineering deep-water oilfield engineering support ships successfully completed the onshore integrated connection. The commissioning test was well received by the user, China Oilfield Services Co., Ltd.; in December, the nationally produced electric propulsion system of the institute successfully won the supply contract for the offshore test platform of the Hangzhou Institute of Applied Acoustics.
The core of the domestic integrated electric propulsion system with independent intellectual property rights in China, the propulsion motor