Logan’s new FlexaGen™ is a variable speed motor/generator, typically driven by the main propulsion engines, through Logan’s innovative FlexaDrive™ multi-drive gearbox system.

The FlexaGen™is designed to be a standardized power conversion building block that permits operators to select pre-integrated, plug and play units of electrical power for their vessels. FlexaGen™ systems are supplied with all necessary power conversion and control equipment, and can be used to support the vessel’s electrical bus, displace an auxiliary diesel generator, or to power specific consumers directly such as bow-thrusters or cargo handling equipment. With standard configurations of 50KW, 75KW and 100KW available, FlexaGen™ is both scalable, and where required, customizable in both size and configuration. 

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FlexaGen™ delivers cost effective power generation solutions for clients and is suitable either for new build or retrofit projects. 
FlexaDriveT™/ FlexaGen™ systems are a smart choice for vessel designers as they accommodate the consolidation of multiple functionalities into a single, small footprint, low cost and expandable platform. In addition to motor/generators, FlexaDrive™ PTOs can be added, as required, to power such vessel services as fuel & hydraulic pumps, steering gears, cooling pumps etc.  


Logan FlexaDriveTM / FlexaGenTM  Systems:Conventional FlexaDrive /  FlexaGen installation showing multiple input/output options

The Logan FlexaDrive: is a multiple pump drive system, sandwiched between your engine and clutch, or transmission; allowing up to ten (10) live PTO / PTI pumps pads for a wide range of hydraulic requirements such as drive shafts, pumps, pulleys, and clutchable power take-offs.

The Logan FlexaGen: utilizes a variable speed motor generator, installed on a FlexaDrive tower, to provide low level propulsion instead of running the large main engines. The same unit can seamlessly function as a genset, and support vessel services, whenever the main engine is running – and further contribute by lowering emissions, fuel consumption, and engine maintenance. An added benefit is increased redundancy, which makes the vessel power plant more robust.


Platform for Hybrid Provision:

Platform for Hybrid Provision | Logan Clutch

The FlexaDrive™/ FlexaGen™ products can also serve as the platform for a “right-sized”, hybrid propulsion system. The FlexaDrive™ HT (Hybrid Technology) system is a full featured alternative to more expensive systems that are currently being marketed in the marine industry. Depending on vessel requirements, the FlexaDrive™ HT system can provide a wide range of operational modes including electric only, diesel electric, mechanical only, bollard boost and more.

 


Single Source for Power:Conventional FlexaDrive!22/ FlexaGen!22  installation showing multiple input/output options

Imagine a new or repowered vessel where the main engines are able to provide propulsive power AND drive electric generators, bow thrusters, and mission specific equipment – plus provide back-up and redundancy for critical vessel systems. The Logan FlexaDrive and FlexaGen make this possible. Full power control shaft with fractional power take off towers.

Logan FlexaDriveTM Advantages

  • Significantly reduces diesel engine operating hours, emissions, fuel consumption and engine maintenance
  • Variable speed motor generator can act as a Genset 
  • Up to ten (10) live PTO / PTI positions 
  • Up to five (5) cartridge style pump drive towers (up to 200 HP / 150 kW for each tower – 600 HP total) for current requirements and future scalability 
  • Flexible couplings in SAE 11.5”, 14”,18” and 21” flywheel sizes
  • For engine capacities from  200 HP (150 kW) up to 5000 HP (3700 kW) @ 2600 RPM
  • Short axial length – Full torque transmission

 

Logan FlexaDriveTM / FlexaGenTM Systems:

The Logan FlexaDrive: is a multiple pump drive system, sandwiched between your engine and clutch, or transmission, allowing up to ten (10) live PTO / PTI pumps pads for a wide range of requirements such as drive shafts, pumps, pulleys, and clutchable power take-offs.

The Logan FlexaGen: utilizes a variable speed motor generator, installed on a FlexaDrive tower, to provide low level propulsion instead of running the large main engines. The same unit can seamlessly function as a genset, and support vessel services, whenever the main engine is running – and further contribute by lowering emissions, fuel consumption, and engine maintenance. An added benefit is increased redundancy, which makes the vessel power plant more robust.


FlexaGen Variable Speed Generator - How it Works

Using a standard asynchronous induction motor is a shaft generator creating electrical power from the main engine and supporting vessel services. It utilizes modern power converter technology and creates an AC output at plant frequency (eg 50Hz or 60Hz) irrespective of the

shaft rpm. The maximum available power developed by this ‘FlexaGen’ ls dependent on shaft rpm, the motor/generator sizing and drive sizing. Ultimately there is a limit of 150kW (at 3000 rpm) for each position on the FlexaDrive. Multiple positions can be used to increase the overall power.

The ‘FlexaGen’ can mimic the properties of a diesel generator and can be configured to run in parallel, sharing load proportionally according to its configuration settings. It can also support the AC bus independently up to its maximum power capability (limited by its own rating and the shaft rpm).

It can be used to mitigate the effects of large step loads on the bus, or to replace a diesel generator connected to the common bus (providing n+1 redundancy), or to make the running of diesel generators unnecessary while the main engine is running. It can also act as a ‘bus saver’ to maintain the bus in the event that other sources (eg diesel gens) fail.

 

FeaturesInternal and External View of Single 99 kW System

  • Three Standard Sizes 50, 75 and 99kW systems
  • Full electrical power output at either 1200 or 1800RPM input speeds (FlexaDrive has 1.43-1.98 speed increase from input shaft speed.)
  • Maximum motor speed is 2x full power speed.
  • Modular electrical cabinet, single cabinet of multiple smaller cabinets
  • Prewired for fast installation in a yard or afloat
  • Automatically synchronizes on to any bus or with any generator
  • Optional “dead bus” startup option
  • Complete documentation set

Logan 99 kW FlexaGen System Depiction

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