Electric marine propulsion system with sensorless control algorithm




The electric propulsion for speedboat with sensorless vector control was developed for the US manufacturer who needed the electric powertrain for various marine applications. The advantages of an electric drive in marine use are many: water and air non-pollution, reduced engine noise, almost unnecessary maintenance etc.

The prototype of the drive that was developed was used as a test version on rowing regattas for the transportation of judges. The most prominent part of the project was to develop an algorithm for sensorless vector control since existing electric motor had no speed nor position measuring devices, which gave him a price advantage. The project has used MC 30 motor controller and Cognitio PCD for powering the electronics from the existing battery pack. The first sensorless FOC algorithm of Cognitio Elektronika to control the electric motor was developed then. The MC 30, as the motor controller with one of the industry’s highest power density, is one of the few controllers that could be fitted in a small space available for the motor controller and other electronics, without compromising the system’s performance. The complete system works reliably and safely for the environment and users, giving the new and different experience to the user.