Ultra-low-speed high-torque motor and crane using this motor

Abstract

The invention discloses a super-low-speed high-torque motor and a crane with the motor. The motor comprises an outer rotor and a stator. The stator is provided with a stator temperature sensor for collecting a temperature signal within the stator. The outer cylinder inner side of the outer rotor is fixedly equipped with a plurality of permanent magnets which are the same tile-shaped hexahedral structures and are regularly arranged along a circumferential direction and an axial direction. A plurality of permanent magnets are arranged in any circumferential and any axial direction. Two circumferential side faces of the permanent magnets are inclined plane shapes with inside cutting angle shapes, and the angle of a cutting angle is 5 degrees to 35 degrees. According to the crane with the motor, the outer cylinder of the motor is used as the winding drum of a lifting mechanism. The motor can normally run in the condition of low speed (super low speed) and large torque, the operation is stable, the vibration is small, the noise is small, the temperature rise is small, and the motor is mainly used for a crane, a port machine, a tower crane, an elevator, a winding machine and other similar occasion.

Description

technical field [0001] The invention relates to an ultra-low-speed high-torque motor, and also to a high-torque crane that directly uses the outer drum of the motor as a reel. Background technique [0002] Existing motors include a rotor and a stator, and usually adopt a structure in which the stator is outside the rotor. There are also some motors with the rotor outside and the stator inside. This type of motor is called an outer rotor motor. The stator iron core of the outer rotor motor is installed on the fixed central shaft, and the windings are embedded in the iron core. The rotor is cylindrical and located outside the stator. The two ends of the outer cylinder of the rotor are provided with fixed discs, which are connected with the central shaft through bearings. After the winding is energized, a rotating magnetic field is generated, which interacts with the permanent magnet installed on the inner wall of the rotor to drive the rotor to rotate. Existing motors of this...

AI Technical Summary

Problems solved by technology

Existing motors of this kind run well at high speeds, but when they need to run at low speeds (including ultra-low speeds), the negative effects such as harmonic torque and cogging torque become very obvious, temperature rises, vibration and noise increase Large, output drops, and even irreversible demagnetization may occur, these defects seriously hinder the application of external rotor motors at low speeds

[0003] Since the existing motor cannot run at low speed and high torque, when it is used to drive the reel in a crane, it needs to set up a huge gearbox for deceleration, which not only has a large volume, complex structure, high production cost and maintenance cost, but also brings inconvenience necessary power consumption

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