Novel electric propulsion system

Abstract

The invention discloses a novel electric propulsion system. The system comprises an internal combustion engine, an electric generator, an electric distribution system, a propulsion motor and a propeller, wherein the electric generator is in cable connection with the propulsion motor through the electric distribution system; the propulsion motor is connected with the propeller through a clutch and a speed reducer; both the electric generator and the propulsion motor are synchronous motors; and the propeller is an adjustable pitch propeller. The novel electric propulsion system effectively solves the problems of high investment cost, electric loss, severe harmonic pollution, difficult maintenance and high failure risk due to the adoption of a variable frequency technique by the electric propulsion system in the prior art and also solves the problems of high voltage drop in a system power grid and big torque born by a starting transient mechanical shaft due to the high starting transient current in the electric propulsion system in the prior art. The novel electric propulsion system has little investment, convenient installation and maintenance, a low running cost, high system reliability, low failure risk in a use process and a remarkable economic benefit.

Description

technical field [0001] The invention relates to a propulsion system, especially a novel electric propulsion system for various ships or other water mobile structures. Background technique [0002] For ships or other water mobile structures driven by traditional internal combustion engines with fixed-pitch propellers, the navigation speed is achieved by adjusting the speed of the internal combustion engine, and the nitrogen oxide emissions of the internal combustion engine are much higher under variable speed operation than under constant speed operation. Its exhaust emissions usually exceed the standard. In the environment of energy saving and emission reduction, the electric propulsion system came into being. The characteristics of the electric propulsion system are: good economy, fuel saving; good maneuverability and safety of the ship. The electric propulsion system uses multiple internal combustion engines, which will not completely lose power when individual units fail...

AI Technical Summary

Problems solved by technology

[0015] The present invention provides an input for solving the problems of high investment cost, large power loss and harmonic pollution, difficult maintenance, and high risk of failure of power equipment for ships sailing on water due to the use of frequency conversion technology in the electric propulsion system of the prior art. A new type of electric propulsion system with less energy consumption, convenient installation and maintenance, low operating costs, high system reliability, and low failure risk during use

[0016] Another object of the present invention is to solve the problems of the electric propulsion system in the prior art that the current at the moment of starting is large, resulting in a large voltage drop of the system grid and the torque received by the mechanical bearing at the moment of starting, and to provide a non-inrush current, mechanical New electric propulsion system with small bearing torque

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