Propulsion systems are designed to meet the specific requirements of each vessel. We offer state-of-the-art systems employing Load Commutated Inverter (LCI) or Pulse Width Modulated (PWM) converter technology driving synchronous or induction motors depending upon the application. In addition, we can also offer propulsion systems using our latest PPH podded technology. These may be configured as commercial system for auxiliary ships, which may or may not be ruggedized for the naval duty. As requirements become more navalized, the systems offered can encompass CODLAG and CODLOG systems as well as IEP/IFEP systems.
The trend towards high power, compact Pulse Width Modulated (PWM) fed induction motors was made possible by developments in electrical machine design and digital control techniques that were pioneered in the early 1990's.
These early examples were developed for industrial applications and although the induction motors were 2x3 phase and transformer fed, the principle of Advanced Induction Motors (AIM) under variable speed control was established.
The AIM motor was designed for converter starting which allows more flexibility and optimization of the electromagnetic design. This, in turn, enables improved efficiency and power factor whilst allowing a larger air gap to provide a good shock withstand capability. The modern naval AIM system consists of a multi-phase machine driven by its complementary PWM converter.
Key features for naval applications include: 
- high power density
- high efficiency
- direct connection to high voltages (no transformers)
- low noise & vibration
- any water cooling
- high shock withstand
- redundancy
- low through-life cost and maintenance.
This system, which has had the advantage of exhaustive testing at land-based test sites in both the UK & the USA, is installed in the Royal Navy's Type 45 Destroyer and forms the baseline propulsion design for the future aircraft carriers of the Royal Navy and the French Navy and for the US Navy's DDG1000 programs.