Electric propulsion converter for ocean fishing boat

Abstract

The invention relates to an electric propulsion converter device for an ocean fishing boat, and in particular relates to an electric propulsion converter for an ocean fishing boat. The electric propulsion converter comprises a cabinet; a power unit, a control unit, a cooling unit and wiring harnesses are arranged in the cabinet; the power unit comprises a rectifier module, an inverter chopper module and a direct-current support capacitor; the rectifier module comprises a rectifier input copper bar, a rectifier power module and a main contactor; the inverter chopper module comprises a three-phase inverter output copper bar and an inverter chopper power module; the control unit comprises a traction control unit, a sensor, a filter and a power supply; the cooling unit comprises a heat exchanger, a water pump, a water replenishing box, a pipeline, a temperature sensor, a pressure sensor, a valve and a cooling pipeline; and the wiring harnesses include low-voltage wiring harness and high-voltage wiring harness. Electric transmission based on the converter gradually replaces the traditional transmission mode by the advantages, such as low speed, large toque, uniform low-speed operation, flexible configuration and high reliability; the electric transmission is the mainstream development direction of ship propulsion; and thus, the electric propulsion converter has wide application prospect.

Description

technical field [0001] The invention relates to a converter for electric propulsion of an ocean-going fishing vessel, in particular to a converter for electric propulsion of an ocean-going fishing vessel. Background technique [0002] For a long time, the transmission mode of fishing boats in my country is mainly driven by the diesel engine through the shaft system. The transmission mode is as follows: figure 1 As shown, the main propulsion system adopts the way that the diesel engine directly drives the propeller through the shaft system. In order to match the speed of the diesel engine and the propeller, and also facilitate the switching of the propulsion and braking conditions of the whole ship, the switching of the diesel engine is generally between the diesel engine and the propeller. A reduction gearbox or a clutch is arranged between them. The direct drive of traditional diesel engine for ocean-going fishing boats has the following disadvantages: 1) When the propulsi...

AI Technical Summary

Problems solved by technology

The direct drive of traditional diesel engine for ocean-going fishing boats has the following disadvantages: 1) When the propulsion diesel engine is running at low or high speed, the fuel economy is poor, the pollution is high, the emission is large, the energy saving and environmental protection are poor, the efficiency is low, and the operating cost is high; 2) The propeller The speed is strictly limited by the idle speed and maximum speed of the diesel engine, low speed and high speed operation efficiency, poor overload capacity, severe mechanical wear of the power device, easy mechanical fatigue of the transmission shaft, high maintenance cost; 3) diesel engines generally choose high-power low-speed diesel engines, and The propulsion shafting is mechanically connected, the main shaft is very long, and the layout of the engine room is relatively fixed and inflexible. When the whole ship brakes or adjusts the speed, the vibration impact is strong and the engine room is noisy.

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