A marine permanent magnet transmission device

Abstract

The invention relates to a permanent magnet transmission device for a boat and solves the problems of the existing permanent magnet transmission device for the boat that the device capacity of a variable frequency driving device is great, the lacked passage operation torque pulsation is great, and the low-speed stator magnetic density wave sine degree is poor. The permanent magnet transmission device comprises a variable frequency driving device and a permanent magnet motor, wherein the variable frequency driving device comprises two variable frequency driving device passages, the electrical topology structures of the variable frequency driving device passages are completely consistent, the two variable frequency driving device passages respectively comprise a first variable frequency driving device passage and a second variable frequency driving device passage, and the first variable frequency driving device passage and the second variable frequency driving device passage are respectively connected with the permanent magnet motor. The permanent magnet transmission device has the advantages that two driving paths capable of independently working and operating are formed, the power supply voltage is fully utilized, the torque pulsation in the whole life cycle is small, the vibration noise is low, the universality of the variable frequency driving device is high, the current in the device can be in an acceptable range under the condition of low power supply voltage power supplying, and the permanent magnet transmission device is particularly suitable for electric propulsion of the boat.

Description

Technical field [0001] The invention relates to a marine transmission device, in particular to a marine permanent magnet transmission device. Background technique [0002] Traditional ship power plants, mainly diesel engines and steam turbines, have made important contributions to the development of ships and shipping. However, these power plants have also hindered their further development due to some inherent shortcomings, such as occupying too much space. For ships with diesel engines and steam turbines as the main engine, the engine room space is occupied by bulky engines, mechanical transmissions, reducers and shafting, etc. The utilization rate of the cabin space is greatly reduced, and the effective load is reduced. The working environment is poor. The engine room with diesel engine or steam turbine as the main engine not only has high vibration, high noise, but also has a lot of oil pollution. Exhaust gas emissions affect air quality and poor sanitary conditions. The hos...

AI Technical Summary

Problems solved by technology

[0003] The permanent magnet transmission is an important development direction of the transmission in the electric propulsion system. It is more and more widely used in various types of ships. The conventional permanent magnet transmission for ships is composed of a permanent magnet motor and a variable frequency drive. Each permanent magnet motor The phase winding is a single complete set of windings, instead of dividing into two sets of half windings. The number of components of the variable frequency drive device is small, but the capacity of the components of the variable frequency drive device is high. When the variable frequency drive device fails and the channel is missing, the permanent magnet The motor operates with a lack of phase, and the torque ripple is large. At the same time, the sine degree of the stator air gap magnetic field becomes worse, which will make the vibration and noise performance of the device worse.

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