Deep-sea underwater direct current brushless motor for integrated driver

Abstract

The invention relates to a deep-sea underwater motor and provides a deep-sea underwater direct current (DC) brushless motor for an integrated driver. The motor comprises DC brushless motor stator and rotor arranged in a sealed shell; a terminal end cover is arranged on one side of the sealed shell relative to an end cover of an output shaft; a driver cabin is arranged outside the terminal end cover; a driver and a pressure compensator are arranged inside the driver cabin; the sealed shell is in sealed assembly with the driver cabin; hydraulic oil is filled with the interior of the sealed shell and the driver cabin; through holes are formed on the terminal end cover, so that the sealed shell is communicated with the driver cabin, and electric wiring of the driver is connected to the motor stator and rotor through the through holes. The invention has the advantages that: the defect that a sensor signal is easily interfered when the brushless motor is subjected to underwater application is effectively overcome, and an external cable of the motor is greatly simplified; a propeller is more compact in whole structure due to integration, and the motor can bear the pressure of seawater atthe depth of 6,000 meters; and the motor is electrically connected by employing an economic watertight joint plug-in semi-cable, and the system is low in cost.

Description

technical field [0001] The present invention relates to a deep-sea underwater motor, and more specifically relates to a deep-sea underwater DC brushless motor with an integrated drive that can be directly used to drive propellers. Background technique [0002] Underwater motors are widely used in underwater electromechanical equipment such as underwater robots. Underwater motors based on DC brushless motors have the advantages of large power-to-volume ratio, large torque, and high efficiency. Existing underwater motor, its structure mostly is to install a sealing casing outside existing motor, seals in the extension shaft part, and the electric cable of motor realizes electrical connection with the outside through the watertight connector on the sealing casing. However, the underwater motors of this structural form generally have problems such as bulky body shape, excessive radial dimension, and insufficient torque. When it is used to drive the propeller of an underwater ro...

AI Technical Summary

Problems solved by technology

Even if the three-phase wire of the motor and the signal wire of the Hall sensor are divided into two watertight connectors for transmission, the problem cannot be solved fundamentally. The cable length should not be too long, and the watertight connectors are expensive, which increases the system cost.

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