Marine underwater shaftless coreless electric propeller

Abstract

The invention relates to a marine underwater shaftless coreless electric propeller, and in particular relates to an open marine underwater electric propeller with a hollow structure. The propeller is characterized by comprising a shell, a coreless stator winding, an outer rotor structure and an inner rotor structure. The coreless stator winding is arranged between the outer rotor structure and the inner rotor structure, the coreless stator winding can generate an electromagnetic torque when current is introduced, and the outer rotor structure and the inner rotor structure can sense the electromagnetic torque of the coreless stator winding at the same time and directly generate driving force for driving a ship to travel. In addition, the marine underwater shaftless coreless electric propeller has the advantages that 1 as the coreless stator winding has no iron core structure of a silicon steel sheet, the problem of energy consumption caused by hysteresis resistance and eddy resistance is avoided, and the power of the electric propeller is improved; and 2 as the transmission technology of a magnetic suspension bearing is adopted, the rolling friction resistance and lubrication maintenance of the bearing are avoided, and the electric propeller can work underwater for a long time.

Description

Technical field [0001] The present invention relates to the field of the motor, particularly, relates to an underwater marine shaftless, coreless electric propulsion. Background technique [0002] In the prior art permanent magnet motor, the permanent magnet is mainly composed of iron core windings and a stator composed of an outer rotor structure, since the stator winding coils are sequentially disposed in the cogging silicon steel core, between the stator windings and the permanent magnets of the outer rotor the air gap, will naturally produce a magnetic field attracting the permanent magnet rotor cogging torque resistance of silicon steel core, when the input current of the stator winding, which is attracted to stator teeth structure will produce magnetic hysteresis and eddy current drag iron loss heat resistance, a relative increase in energy consumption wheel motor effects the output power of the motor. Therefore, a high energy conversion efficiency coreless wheel motor tech...

AI Technical Summary

Problems solved by technology

[0002] In the existing permanent magnet motor technology, it is mainly composed of a stator core winding and a permanent magnet outer rotor structure. Since the stator winding coils are sequentially arranged in the tooth slots of the silicon steel sheet iron core, the gap between the stator winding and the permanent magnet outer rotor In the air gap, there will naturally be a cogging resistance torque of the permanent magnet rotor magnetic field to attract the silicon steel sheet iron core. When the stator winding inputs current, the attracted stator cogging structure will generate hysteresis resistance and eddy current The iron loss heat energy of the resistance relatively increases the internal energy consumption of the hub motor and affects the output power of the motor

Therefore, the ironless hub motor technology with high energy conversion efficiency will become the technological innovation direction in the field of electric vehicles. The magnetic field lines of the electromagnetic torque of the ironless stator winding will be weakened

In order to solve the problem of relatively weak electromagnetic torque, the magnetic flux density of the permanent magnet rotor must be increased, which will inevitably increase the production cost of the permanent magnet of the hub motor

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