![]() The shaft generator is installed in the shaft line between the low-speed main diesel engine and the propeller.However, the shaft generator can be arranged and driven by the main engine in various configurations. For example, it is possible to select a shaft generator speed range of 60% to 100% of the main engine speed with a constant system output.Īll shaft generator systems have one thing in common: The active power required for the mains is generated by the main engine. The useful speed range of the shaft generator can be defined from the ship’s operational requirements. Shaft generator systems with frequency converters supply a three-phase current of constant voltage and frequency to the mains at variable main engine speeds. No step-up transformer for 400 V, 450 V, 690 V and 6,6 kV solutions.Geared shaft generator as standard brushless synchronous generator.Water cooling of the power electronics with connection to the ship’s fresh water cooling system.Just 2 components – shaft generator and the frequency converter panel – to be installed resulting in reduced volume and weight as well as lower costs for foundation, cables and cable work.High mains quality with excellent harmonic distortion content due to high IGBT pulse frequency.PWM frequency converter system with more economic power generation thanks to improved efficiency.This configuration has the following features and benefits: An additional synchronous compensator is no longer needed to generate the reactive power or the short circuit current, and is not required for the voltage control or for the filter circuits in order to lower the harmonics to admissible levels. Wärtsilä’s shaft generator systems are designed with PWM frequency converters using modern IGBT technology. ![]()
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