Propulsion device without gear box for vector control of permanent magnet synchronous motor of electric ship

Abstract

The invention relates to a propulsion device without a gear box for the vector control of a permanent magnet synchronous motor of an electric ship. Two power supplies are respectively electrically connected with an FOC (Field Oriented Control) vector control frequency converter through a propulsion operation platform and a cable; the FOC vector control frequency converter is electrically connected with a permanent magnet brushless synchronous motor through a cable; the permanent magnet brushless synchronous motor is coaxially connected with a rotary transformer and a propeller and mechanically connected with a speed indicating generator; the rotary transformer is electrically connected with the FOC vector control frequency converter through a cable; the speed indicating generator is electrically connected with the combined type propulsion operation platform through a cable; and the speed indicating generator and a storage battery are electrically connected with the FOC vector control frequency converter through cables. The invention directly drives the permanent magnet brushless synchronous motor by adopting the vector control without using the gear box and a brake, thereby optimizing the control characteristics of the electric ship and saving the electric energy.

Description

technical field [0001] The invention relates to a propulsion device of an electric ship, in particular to a permanent magnet synchronous motor vector control gearless propulsion device of the electric ship. Background technique [0002] At present, traditional diesel engines directly propel ships occupying a dominant position. Diesel engines are inefficient (less than 30%) and pollute. There is smoke, odor, noise, and industrial oil and water. The reason for the low efficiency is that the energy taken away by flue gas and cooling water cannot be recovered as much as on land. A variety of reasons, from the perspective of the propulsion link, are that the kinetic energy loss is relatively large, and the kinetic energy cannot be recovered. The reasons for the inefficiency of the direct propulsion mode of the diesel engine include that the shafting is too long and the inertia is too large, the working mode is determined by the nature of the ship's advance and retreat speed, freq...

AI Technical Summary

Problems solved by technology

In terms of the overall scheme of ship electric propulsion, there is still a lack of an overall optimized and more energy-saving electric propulsion scheme

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